/* roulang page: index */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }
        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.35;
            color: #fff;
            margin-bottom: 0.6em;
        }
        h1 {
            font-size: 2.5rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }

        p {
            margin-bottom: 1.2em;
            color: var(--text-secondary);
        }

        .text-cyan {
            color: var(--accent-cyan);
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }
        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
        }
        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 0;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .btn-text:hover {
            color: #fff;
            gap: 10px;
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.4);
        }
        .btn-text .arrow {
            transition: transform var(--transition-fast);
        }
        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        /* Sidebar Navigation */
        .sidebar-nav {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-secondary);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            overflow-y: auto;
            transition: transform var(--transition-smooth);
        }
        .sidebar-nav .nav-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }
        .sidebar-nav .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.03em;
            font-family: var(--font-heading);
        }
        .sidebar-nav .nav-brand .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #0B0E14;
            font-weight: 900;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-list {
            flex: 1;
            padding: 16px 0;
            overflow-y: auto;
        }
        .sidebar-nav .nav-list li {
            margin: 2px 0;
        }
        .sidebar-nav .nav-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            position: relative;
        }
        .sidebar-nav .nav-list a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.04);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }
        .sidebar-nav .nav-list a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.08);
            border-left-color: var(--accent-cyan);
            font-weight: 700;
        }
        .sidebar-nav .nav-list a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .sidebar-nav .nav-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            width: calc(100% - var(--sidebar-width));
        }

        /* Mobile Top Nav */
        .mobile-top-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: var(--bg-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 16px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-top-nav .brand-mobile {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            font-family: var(--font-heading);
        }
        .mobile-top-nav .brand-mobile .logo-icon-sm {
            width: 30px;
            height: 30px;
            border-radius: 5px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: #0B0E14;
            font-weight: 900;
        }
        .hamburger-btn {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 6px;
            transition: color var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
        }
        .hamburger-btn:hover {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 998;
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 260px;
            background: var(--bg-secondary);
            z-index: 999;
            flex-direction: column;
            overflow-y: auto;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            transform: translateX(-100%);
            transition: transform var(--transition-smooth);
        }
        .mobile-nav-panel.open {
            transform: translateX(0);
        }
        .mobile-nav-panel .nav-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 20px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
        }
        .mobile-nav-panel .nav-list a:hover,
        .mobile-nav-panel .nav-list a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.06);
            border-left-color: var(--accent-cyan);
        }

        /* Sections */
        section {
            padding: 70px 0;
            position: relative;
        }
        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* Hero Section */
        .hero-section {
            padding: 60px 0 50px;
            background: var(--bg-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .hero-icon-matrix {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-bottom: 32px;
        }
        .hero-icon-item {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            transition: all var(--transition-smooth);
        }
        .hero-icon-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .hero-status-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            align-items: center;
            margin-bottom: 24px;
            padding: 14px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-subtle);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-status-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #00FF88;
            animation: pulse-dot 2s infinite;
            box-shadow: 0 0 8px rgba(0, 255, 136, 0.6);
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 8px rgba(0, 255, 136, 0.6);
            }
            50% {
                box-shadow: 0 0 20px rgba(0, 255, 136, 1);
            }
        }
        .hero-status-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
        }
        .hero-status-text strong {
            color: #fff;
            font-weight: 700;
        }
        .hero-title-area {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 20px;
        }
        .hero-title-area h1 {
            font-size: 2.6rem;
            background: linear-gradient(135deg, #00F0FF 0%, #fff 60%, #00F0FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }
        .hero-title-area .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 650px;
            margin: 0 auto 24px;
        }
        .hero-cta-row {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .hero-data-points {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            justify-content: center;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .hero-data-point {
            text-align: center;
        }
        .hero-data-point .data-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }
        .hero-data-point .data-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* Entry Matrix */
        .entry-matrix-section {
            background: var(--bg-secondary);
            padding: 60px 0;
        }
        .entry-matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .entry-matrix-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            cursor: pointer;
            display: block;
            color: inherit;
            text-decoration: none;
        }
        .entry-matrix-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            color: inherit;
            text-shadow: none;
        }
        .entry-matrix-card .matrix-icon {
            font-size: 2.2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            display: block;
        }
        .entry-matrix-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: #fff;
        }
        .entry-matrix-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }

        /* Selling Points */
        .selling-points-section {
            background: var(--bg-primary);
            padding: 60px 0;
        }
        .selling-cards {
            display: grid;
            grid-template-columns: 1.2fr 1fr 0.8fr;
            gap: 20px;
        }
        .selling-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .selling-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .selling-card.featured {
            border-color: var(--border-strong);
            background: rgba(20, 28, 38, 0.98);
        }
        .selling-card .card-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            display: block;
        }
        .selling-card h3 {
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .selling-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .selling-card .card-accent-line {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }
        .selling-card:hover .card-accent-line {
            opacity: 1;
        }

        /* Deep Content A */
        .deep-content-a {
            background: var(--bg-primary);
            position: relative;
            padding: 60px 0;
        }
        .deep-content-a .bg-overlay {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            opacity: 0.12;
            z-index: 0;
        }
        .deep-content-a .content-inner {
            position: relative;
            z-index: 1;
            background: rgba(11, 14, 20, 0.85);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            max-width: 1000px;
            margin: 0 auto;
        }
        .deep-content-a h2 {
            color: #fff;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }
        .deep-content-a p {
            color: var(--text-secondary);
            line-height: 1.9;
            font-size: 0.95rem;
            margin-bottom: 1em;
        }
        .deep-content-a .data-table-wrap {
            overflow-x: auto;
            margin: 24px 0;
        }
        .deep-content-a table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 600px;
        }
        .deep-content-a table th {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            padding: 12px 14px;
            text-align: left;
            font-weight: 700;
            border-bottom: 2px solid var(--border-subtle);
            font-family: var(--font-mono);
            font-size: 0.85rem;
            letter-spacing: 0.03em;
        }
        .deep-content-a table td {
            padding: 10px 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            color: var(--text-secondary);
            font-family: var(--font-mono);
            font-size: 0.85rem;
        }
        .deep-content-a table tr:hover td {
            background: rgba(0, 240, 255, 0.03);
            color: #fff;
        }

        /* Scene Demo */
        .scene-demo-section {
            background: var(--bg-secondary);
            padding: 60px 0;
        }
        .scene-demo-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 40px;
        }
        .scene-demo-row:last-child {
            margin-bottom: 0;
        }
        .scene-demo-row.reverse {
            direction: rtl;
        }
        .scene-demo-row.reverse .scene-text {
            direction: ltr;
        }
        .scene-demo-row .scene-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
        }
        .scene-demo-row .scene-img:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card-hover);
        }
        .scene-demo-row .scene-img img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
        }
        .scene-demo-row .scene-text h3 {
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .scene-demo-row .scene-text p {
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* Milestone / Timeline */
        .milestone-section {
            background: var(--bg-primary);
            padding: 60px 0;
        }
        .timeline {
            position: relative;
            padding-left: 40px;
            border-left: 2px solid var(--border-subtle);
            max-width: 800px;
            margin: 0 auto;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding-left: 28px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -49px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--accent-cyan);
            border: 3px solid var(--bg-primary);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
            z-index: 2;
        }
        .timeline-item .tl-date {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
            margin-bottom: 4px;
        }
        .timeline-item h3 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 6px;
        }
        .timeline-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* Deep Content B */
        .deep-content-b {
            background: var(--bg-primary);
            padding: 60px 0;
        }
        .asymmetric-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 28px;
            align-items: start;
        }
        .asymmetric-grid .main-text {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            border: 1px solid var(--border-subtle);
        }
        .asymmetric-grid .main-text h2 {
            font-size: 1.7rem;
            margin-bottom: 18px;
        }
        .asymmetric-grid .main-text p {
            line-height: 1.9;
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 1em;
        }
        .asymmetric-grid .side-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            border: 1px solid var(--border-subtle);
            position: sticky;
            top: 80px;
        }
        .asymmetric-grid .side-card h4 {
            font-size: 1rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .asymmetric-grid .side-card .live-score-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            font-size: 0.85rem;
            font-family: var(--font-mono);
            color: var(--text-secondary);
        }
        .asymmetric-grid .side-card .live-score-item .score {
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
        }
        .asymmetric-grid .side-card .live-score-item .live-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #00FF88;
            display: inline-block;
            margin-right: 4px;
            animation: pulse-dot 2s infinite;
        }

        /* Brand Intro */
        .brand-intro-section {
            background: var(--bg-secondary);
            padding: 50px 0;
            text-align: center;
        }
        .brand-intro-block {
            max-width: 750px;
            margin: 0 auto;
            padding: 36px 32px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
        }
        .brand-intro-block .brand-logo-large {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            font-family: var(--font-heading);
            letter-spacing: 0.04em;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .brand-intro-block .brand-logo-large .bl-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #0B0E14;
            font-weight: 900;
        }
        .brand-intro-block p {
            line-height: 1.9;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* Social Proof / Reviews */
        .social-proof-section {
            background: var(--bg-primary);
            padding: 60px 0;
        }
        .review-bubbles {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 40px;
        }
        .review-bubble {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            position: relative;
            transition: all var(--transition-smooth);
        }
        .review-bubble:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card-hover);
        }
        .review-bubble::before {
            content: '\201C';
            font-size: 3rem;
            color: var(--accent-cyan);
            opacity: 0.4;
            position: absolute;
            top: 8px;
            left: 16px;
            line-height: 1;
            font-family: Georgia, serif;
        }
        .review-bubble .review-text {
            padding-top: 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            font-style: italic;
        }
        .review-bubble .reviewer {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .review-bubble .reviewer-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), #0088AA);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: #fff;
            font-weight: 700;
            flex-shrink: 0;
        }
        .review-bubble .reviewer-name {
            font-size: 0.85rem;
            color: #fff;
            font-weight: 600;
        }
        .review-bubble .reviewer-role {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .partner-logos {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: center;
            align-items: center;
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .partner-logo-placeholder {
            width: 100px;
            height: 40px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.05em;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .partner-logo-placeholder:hover {
            border-color: var(--border-subtle);
            color: #fff;
            background: rgba(0, 240, 255, 0.04);
        }

        /* News Section */
        .news-section {
            background: var(--bg-secondary);
            padding: 60px 0;
        }
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 14px;
            max-width: 900px;
            margin: 0 auto;
        }
        .news-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
        }
        .news-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card-hover);
        }
        .news-item .news-date-badge {
            flex-shrink: 0;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 0.78rem;
            font-weight: 700;
            text-align: center;
            min-width: 70px;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }
        .news-item .news-content {
            flex: 1;
        }
        .news-item .news-content h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 6px;
            font-weight: 600;
        }
        .news-item .news-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        /* Festival Campaign */
        .festival-section {
            background: linear-gradient(135deg, #0B0E14 0%, #1A1F2E 50%, #0B0E14 100%);
            padding: 50px 0;
            position: relative;
            overflow: hidden;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }
        .festival-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(0, 240, 255, 0.04) 0%, transparent 70%);
            z-index: 0;
            animation: rotate-slow 30s linear infinite;
        }
        @keyframes rotate-slow {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }
        .festival-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .festival-content .festival-badge {
            display: inline-block;
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
            border: 1px solid rgba(212, 175, 55, 0.4);
        }
        .festival-content h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .festival-content p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
        }
        .festival-gifts {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
            margin-bottom: 24px;
        }
        .festival-gift-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            text-align: center;
            min-width: 120px;
            transition: all var(--transition-smooth);
        }
        .festival-gift-card:hover {
            border-color: var(--accent-gold);
            box-shadow: 0 0 20px rgba(212, 175, 55, 0.2);
        }
        .festival-gift-card .gift-icon {
            font-size: 1.8rem;
            margin-bottom: 8px;
            display: block;
        }
        .festival-gift-card .gift-label {
            font-size: 0.85rem;
            color: #fff;
            font-weight: 600;
        }

        /* Platform Guarantee */
        .platform-guarantee-section {
            background: var(--bg-primary);
            padding: 60px 0;
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .guarantee-card {
            text-align: center;
            padding: 28px 18px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
        }
        .guarantee-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .guarantee-card .guarantee-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            display: block;
        }
        .guarantee-card h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 6px;
        }
        .guarantee-card p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 0;
        }

        /* App Download */
        .app-download-section {
            background: var(--bg-secondary);
            padding: 60px 0;
            text-align: center;
        }
        .app-download-block {
            max-width: 600px;
            margin: 0 auto;
            padding: 40px 32px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
        }
        .app-download-block h2 {
            margin-bottom: 10px;
        }
        .app-download-block p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .app-download-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-primary);
            padding: 60px 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item.active {
            border-color: var(--border-strong);
        }
        .faq-question {
            padding: 18px 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 0.95rem;
            color: #fff;
            user-select: none;
            transition: all var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 20px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* Bottom Sticky CTA */
        .bottom-sticky-cta {
            position: fixed;
            bottom: 0;
            left: var(--sidebar-width);
            right: 0;
            background: rgba(11, 14, 20, 0.95);
            border-top: 1px solid var(--border-subtle);
            padding: 12px 24px;
            z-index: 900;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: transform var(--transition-smooth);
        }
        .bottom-sticky-cta .sticky-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .bottom-sticky-cta .sticky-text strong {
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 50px 0 30px;
            margin-bottom: 56px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
        }
        .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .footer-col p,
        .footer-col li {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
            font-size: 0.85rem;
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }
        .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }
        .footer-bottom .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Responsive */
        @media screen and (max-width: 1024px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar-nav {
                display: none;
            }
            .main-content {
                margin-left: 0;
                width: 100%;
            }
            .mobile-top-nav {
                display: flex;
            }
            .mobile-nav-overlay.show {
                display: block;
            }
            .mobile-nav-panel.show {
                display: flex;
            }
            .main-content {
                padding-top: 56px;
            }
            .bottom-sticky-cta {
                left: 0;
            }
            .entry-matrix-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .selling-cards {
                grid-template-columns: 1fr 1fr;
            }
            .selling-cards .selling-card:first-child {
                grid-column: span 2;
            }
            .asymmetric-grid {
                grid-template-columns: 1fr;
            }
            .asymmetric-grid .side-card {
                position: static;
                top: auto;
            }
            .review-bubbles {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .scene-demo-row {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .scene-demo-row.reverse {
                direction: ltr;
            }
            .hero-data-points {
                gap: 16px;
            }
            .hero-data-point .data-value {
                font-size: 1.4rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            section {
                padding: 40px 0;
            }
            .section-container {
                padding: 0 20px;
            }
        }

        @media screen and (max-width: 640px) {
            .entry-matrix-grid {
                grid-template-columns: 1fr;
            }
            .selling-cards {
                grid-template-columns: 1fr;
            }
            .selling-cards .selling-card:first-child {
                grid-column: span 1;
            }
            .review-bubbles {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-icon-matrix {
                gap: 8px;
            }
            .hero-icon-item {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .hero-status-bar {
                flex-direction: column;
                gap: 8px;
                text-align: center;
                border-radius: var(--radius-md);
                padding: 12px 16px;
            }
            .hero-title-area h1 {
                font-size: 1.6rem;
            }
            .hero-title-area .hero-desc {
                font-size: 0.9rem;
            }
            .hero-data-points {
                flex-direction: column;
                gap: 10px;
            }
            .news-item {
                flex-direction: column;
                gap: 8px;
            }
            .news-item .news-date-badge {
                align-self: flex-start;
            }
            .bottom-sticky-cta {
                flex-direction: column;
                text-align: center;
                padding: 10px 16px;
                gap: 8px;
            }
            .bottom-sticky-cta .sticky-text {
                font-size: 0.8rem;
            }
            .deep-content-a .content-inner {
                padding: 24px 16px;
            }
            .asymmetric-grid .main-text {
                padding: 24px 16px;
            }
            .brand-intro-block {
                padding: 24px 16px;
            }
            .festival-content h2 {
                font-size: 1.5rem;
            }
            .timeline {
                padding-left: 24px;
            }
            .timeline-item {
                padding-left: 16px;
            }
            .timeline-item::before {
                left: -33px;
                width: 10px;
                height: 10px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }

        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }

        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .text-cyan {
            color: var(--accent-cyan);
        }

        .text-gold {
            color: var(--accent-gold);
        }

        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }

        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
        }

        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 0;
            transition: all var(--transition-fast);
        }

        .btn-text:hover {
            color: #fff;
            gap: 10px;
        }

        .btn-text i {
            transition: transform var(--transition-fast);
        }

        .btn-text:hover i {
            transform: translateX(3px);
        }

        /* 左侧导航栏 */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 0;
            border-right: 1px solid var(--border-subtle);
            overflow-y: auto;
            transition: transform var(--transition-smooth);
        }

        .sidebar-nav .nav-brand {
            padding: 22px 20px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
            flex-shrink: 0;
        }

        .sidebar-nav .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.03em;
            text-decoration: none;
        }

        .sidebar-nav .nav-brand .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-cyan), #00B8D4);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #1A1F2E;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .sidebar-nav .nav-brand a:hover {
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
            color: #fff;
        }

        .nav-list {
            flex: 1;
            padding: 16px 0;
            overflow-y: auto;
        }

        .nav-list li {
            margin: 2px 0;
        }

        .nav-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 20px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            text-decoration: none;
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-list li a .nav-icon {
            width: 22px;
            text-align: center;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .nav-list li a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.04);
            border-left-color: rgba(0, 240, 255, 0.4);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }

        .nav-list li a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.08);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.35);
        }

        .nav-footer {
            padding: 14px 20px;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            font-size: 0.75rem;
            color: var(--text-muted);
            flex-shrink: 0;
            text-align: center;
        }

        /* 主内容区 */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: calc(100% - var(--sidebar-width));
        }

        .section-container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 28px;
            width: 100%;
        }

        /* 分类页Hero */
        .category-hero {
            position: relative;
            padding: 60px 0 50px;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 20, 0.75) 0%, rgba(26, 31, 46, 0.92) 100%);
            z-index: 1;
        }

        .category-hero .hero-inner {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .category-hero .hero-badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid var(--border-subtle);
            margin-bottom: 16px;
        }

        .category-hero h1 {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            line-height: 1.3;
            letter-spacing: 0.02em;
        }

        .category-hero h1 .highlight {
            color: var(--accent-cyan);
        }

        .category-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* 数据刷新倒计时条（秒杀闪购条转化） */
        .flash-countdown-bar {
            background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(0, 240, 255, 0.1) 100%);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 24px;
            backdrop-filter: blur(6px);
        }

        .flash-countdown-bar .countdown-left {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .flash-countdown-bar .countdown-icon {
            font-size: 1.6rem;
            color: var(--accent-gold);
            animation: pulse-gold 1.5s ease-in-out infinite;
        }

        @keyframes pulse-gold {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.5;
            }
        }

        .flash-countdown-bar .countdown-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
        }

        .flash-countdown-bar .countdown-timer {
            font-family: var(--font-mono);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            background: rgba(0, 0, 0, 0.4);
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
            min-width: 100px;
            text-align: center;
        }

        .flash-countdown-bar .countdown-cta {
            flex-shrink: 0;
        }

        /* 主推战队数据卡 */
        .featured-team-card {
            background: var(--bg-card);
            border: 2px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            align-items: center;
            margin-top: 28px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth);
        }

        .featured-team-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.3);
            transform: translateY(-2px);
        }

        .featured-team-card .team-avatar {
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan-glow), rgba(0, 240, 255, 0.05));
            border: 3px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 2.2rem;
            color: var(--accent-cyan);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.2);
        }

        .featured-team-card .team-info {
            flex: 1;
            min-width: 200px;
        }

        .featured-team-card .team-name {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .featured-team-card .team-subtitle {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .featured-team-card .team-stats-row {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .featured-team-card .stat-item {
            text-align: center;
        }

        .featured-team-card .stat-value {
            font-family: var(--font-mono);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent-gold);
        }

        .featured-team-card .stat-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        .featured-team-card .team-cta {
            flex-shrink: 0;
        }

        /* 板块通用 */
        .section-block {
            padding: 56px 0;
        }

        .section-block-alt {
            background: rgba(11, 14, 20, 0.5);
            padding: 56px 0;
        }

        .section-title {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 600px;
        }

        /* 内容列表卡片 */
        .analysis-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 20px;
        }

        .analysis-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .analysis-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }

        .analysis-card .card-img-wrap {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .analysis-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition-smooth);
        }

        .analysis-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .analysis-card .card-img-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .analysis-card .card-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .analysis-card .card-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 6px;
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }

        .analysis-card .card-title {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .analysis-card:hover .card-title {
            color: var(--accent-cyan);
        }

        .analysis-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
        }

        .analysis-card .card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }

        .analysis-card .card-tags .tag {
            font-size: 0.72rem;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            background: rgba(0, 240, 255, 0.06);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 240, 255, 0.15);
            letter-spacing: 0.02em;
        }

        /* 侧边栏 */
        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 22px 20px;
            margin-bottom: 20px;
        }

        .sidebar-widget h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-subtle);
            letter-spacing: 0.02em;
        }

        .sidebar-widget .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-widget .tag-cloud .tag-link {
            font-size: 0.78rem;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: rgba(0, 240, 255, 0.05);
            color: var(--text-secondary);
            border: 1px solid rgba(0, 240, 255, 0.12);
            text-decoration: none;
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .sidebar-widget .tag-cloud .tag-link:hover {
            background: rgba(0, 240, 255, 0.15);
            color: #fff;
            border-color: var(--accent-cyan);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }

        .sidebar-widget .rank-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.88rem;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }

        .sidebar-widget .rank-list li:hover {
            color: #fff;
        }

        .sidebar-widget .rank-list .rank-num {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .sidebar-widget .rank-list .rank-num.top {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
        }

        /* 底部CTA */
        .bottom-cta-section {
            background: linear-gradient(180deg, rgba(11, 14, 20, 0.8) 0%, rgba(26, 31, 46, 0.95) 100%);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0;
            text-align: center;
        }

        .bottom-cta-section h3 {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .bottom-cta-section p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        /* 页脚 */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            flex-shrink: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }

        .site-footer .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .site-footer .footer-col p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }

        .site-footer .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.25);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .site-footer .footer-links a {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* 移动端导航 */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 200;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            font-size: 1.2rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 150;
        }

        /* 响应式 */
        @media screen and (max-width: 1024px) {
            .sidebar-nav {
                transform: translateX(-100%);
            }
            .sidebar-nav.mobile-open {
                transform: translateX(0);
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .mobile-nav-overlay.active {
                display: block;
            }
            .main-content {
                margin-left: 0;
                width: 100%;
            }
            .category-hero {
                padding: 50px 0 36px;
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .section-block,
            .section-block-alt {
                padding: 36px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .analysis-list {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
                gap: 16px;
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .featured-team-card {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .featured-team-card .team-stats-row {
                justify-content: center;
            }
            .flash-countdown-bar {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .flash-countdown-bar .countdown-left {
                justify-content: center;
            }
        }

        @media screen and (max-width: 640px) {
            .category-hero {
                padding: 40px 0 28px;
                min-height: 240px;
            }
            .category-hero h1 {
                font-size: 1.4rem;
            }
            .category-hero .hero-desc {
                font-size: 0.9rem;
            }
            .section-container {
                padding: 0 16px;
            }
            .section-block,
            .section-block-alt {
                padding: 28px 0;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .analysis-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .analysis-card .card-img-wrap {
                height: 150px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .site-footer .footer-links {
                justify-content: center;
                gap: 10px;
            }
            .featured-team-card .team-avatar {
                width: 64px;
                height: 64px;
                font-size: 1.5rem;
            }
            .featured-team-card .team-name {
                font-size: 1.2rem;
            }
            .featured-team-card .stat-value {
                font-size: 1.1rem;
            }
            .flash-countdown-bar .countdown-timer {
                font-size: 1.2rem;
                padding: 4px 12px;
            }
            .bottom-cta-section h3 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }

        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }

        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        .text-cyan {
            color: var(--accent-cyan);
        }

        .text-gold {
            color: var(--accent-gold);
        }

        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }

        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
        }

        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 0;
            transition: all var(--transition-fast);
        }

        .btn-text:hover {
            color: #fff;
            gap: 10px;
        }

        .section-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 左侧导航栏 */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            z-index: 100;
            display: flex;
            flex-direction: column;
            border-right: 1px solid rgba(0, 240, 255, 0.1);
            overflow-y: auto;
            transition: transform var(--transition-smooth);
        }

        .sidebar-nav .nav-brand {
            padding: 20px 18px;
            border-bottom: 1px solid rgba(0, 240, 255, 0.12);
        }

        .sidebar-nav .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            text-decoration: none;
            letter-spacing: 0.04em;
        }

        .sidebar-nav .nav-brand a:hover {
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            border-radius: var(--radius-sm);
            color: #0B0E14;
            font-size: 1rem;
        }

        .nav-list {
            list-style: none;
            padding: 12px 0;
            flex: 1;
        }

        .nav-list li {
            margin: 2px 0;
        }

        .nav-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 18px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            position: relative;
        }

        .nav-list li a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.05);
            border-left-color: rgba(0, 240, 255, 0.4);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }

        .nav-list li a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.08);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
        }

        .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: var(--accent-cyan);
            opacity: 0.7;
        }

        .nav-list li a.active .nav-icon {
            opacity: 1;
        }

        .nav-footer {
            padding: 14px 18px;
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* 主内容区 */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            width: calc(100% - var(--sidebar-width));
        }

        /* 移动端顶部导航 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 99;
            background: var(--bg-secondary);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
            padding: 0 16px;
            height: 56px;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            text-decoration: none;
        }

        .mobile-header .mobile-brand .logo-icon {
            width: 30px;
            height: 30px;
            font-size: 0.8rem;
        }

        .hamburger-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-sm);
            color: var(--accent-cyan);
            font-size: 1.2rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .hamburger-btn:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-cyan);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 98;
        }

        .mobile-nav-overlay.active {
            display: block;
        }

        /* Hero */
        .cat-hero {
            position: relative;
            padding: 80px 0 60px;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 20, 0.85) 0%, rgba(26, 31, 46, 0.9) 100%);
            z-index: 1;
        }

        .cat-hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .cat-hero .badge {
            margin-bottom: 16px;
        }

        .cat-hero h1 {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .cat-hero h1 span {
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .cat-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 24px;
            max-width: 680px;
        }

        .cat-hero .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            text-align: center;
        }

        .hero-stat-item .stat-number {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1.2;
        }

        .hero-stat-item .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 内容列表区 */
        .data-list-section {
            padding: 60px 0;
            background: var(--bg-primary);
        }

        .data-list-section .section-title {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .data-list-section .section-subtitle {
            color: var(--text-muted);
            margin-bottom: 36px;
            font-size: 0.95rem;
        }

        .data-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .data-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 14px;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .data-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .data-card .card-date-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.78rem;
            color: var(--accent-cyan);
            font-weight: 500;
            background: var(--accent-cyan-glow);
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            width: fit-content;
            border: 1px solid var(--border-subtle);
            white-space: nowrap;
        }

        .data-card .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .data-card .card-tag {
            font-size: 0.72rem;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            background: rgba(212, 175, 55, 0.1);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.2);
            white-space: nowrap;
        }

        .data-card .card-title {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 600;
            color: #fff;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .data-card:hover .card-title {
            color: var(--accent-cyan);
        }

        .data-card .card-summary {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .data-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            transition: gap var(--transition-fast);
        }

        .data-card:hover .card-link {
            gap: 10px;
        }

        /* 场景说明区 */
        .scenario-section {
            padding: 60px 0;
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.08);
            border-bottom: 1px solid rgba(0, 240, 255, 0.08);
        }

        .scenario-section .section-title {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
            text-align: center;
        }

        .scenario-section .section-subtitle {
            color: var(--text-muted);
            margin-bottom: 40px;
            font-size: 0.95rem;
            text-align: center;
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            transition: all var(--transition-smooth);
        }

        .scenario-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .scenario-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-cyan-glow);
            border-radius: 50%;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            border: 1px solid var(--border-subtle);
        }

        .scenario-item h3 {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }

        .scenario-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-section {
            padding: 60px 0;
            background: var(--bg-primary);
        }

        .faq-section .section-title {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
            text-align: center;
        }

        .faq-section .section-subtitle {
            color: var(--text-muted);
            margin-bottom: 36px;
            font-size: 0.95rem;
            text-align: center;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item.active {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: #fff;
            transition: color var(--transition-fast);
            user-select: none;
            gap: 12px;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            font-size: 1rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            padding: 0 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        /* CTA区域 */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(180deg, rgba(0, 240, 255, 0.04) 0%, rgba(26, 31, 46, 1) 100%);
            text-align: center;
        }

        .cta-section .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            max-width: 700px;
            margin: 0 auto;
            box-shadow: var(--shadow-glow);
        }

        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .cta-section .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 黏性底部条 */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: var(--sidebar-width);
            right: 0;
            background: rgba(11, 14, 20, 0.95);
            border-top: 1px solid var(--border-subtle);
            padding: 12px 24px;
            z-index: 90;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            transition: transform var(--transition-smooth);
        }

        .sticky-bottom-bar .sticky-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .sticky-bottom-bar .btn-primary {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        /* 页脚 */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding: 50px 0 30px;
            margin-bottom: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }

        .footer-bottom {
            border-top: 1px solid rgba(0, 240, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            align-items: center;
        }

        .footer-links a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 4px rgba(0, 240, 255, 0.3);
        }

        .footer-links span {
            color: var(--text-muted);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 0px;
            }

            .sidebar-nav {
                transform: translateX(-260px);
                width: 260px;
                box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
            }

            .sidebar-nav.mobile-open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
                width: 100%;
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                padding-top: 56px;
            }

            .cat-hero {
                padding: 50px 0 40px;
                min-height: 300px;
            }

            .cat-hero h1 {
                font-size: 1.8rem;
            }

            .data-card-grid {
                grid-template-columns: 1fr;
            }

            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }

            .sticky-bottom-bar {
                left: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .hero-stat-item .stat-number {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 640px) {
            .cat-hero {
                padding: 36px 0 30px;
                min-height: 260px;
            }

            .cat-hero h1 {
                font-size: 1.5rem;
            }

            .cat-hero .hero-desc {
                font-size: 0.9rem;
            }

            .cat-hero .hero-stats {
                gap: 16px;
            }

            .hero-stat-item .stat-number {
                font-size: 1.25rem;
            }

            .data-list-section {
                padding: 40px 0;
            }

            .data-list-section .section-title {
                font-size: 1.35rem;
            }

            .data-card {
                padding: 18px;
            }

            .data-card .card-title {
                font-size: 1rem;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .scenario-section {
                padding: 40px 0;
            }

            .scenario-section .section-title {
                font-size: 1.35rem;
            }

            .faq-section {
                padding: 40px 0;
            }

            .faq-section .section-title {
                font-size: 1.35rem;
            }

            .cta-section {
                padding: 40px 0;
            }

            .cta-section .cta-box {
                padding: 28px 18px;
            }

            .cta-section h2 {
                font-size: 1.3rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .footer-links {
                justify-content: center;
                gap: 10px;
            }

            .sticky-bottom-bar {
                flex-direction: column;
                gap: 8px;
                padding: 10px 16px;
                text-align: center;
            }

            .sticky-bottom-bar .sticky-text {
                font-size: 0.8rem;
            }

            .sticky-bottom-bar .btn-primary {
                width: 100%;
                justify-content: center;
                font-size: 0.85rem;
                padding: 10px 16px;
            }

            .section-container {
                padding: 0 16px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }
        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        .text-cyan {
            color: var(--accent-cyan);
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }
        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }
        .badge-live {
            background: rgba(255, 50, 50, 0.2);
            color: #ff4d4d;
            border: 1px solid rgba(255, 50, 50, 0.4);
            animation: livePulse 1.5s ease-in-out infinite;
        }
        @keyframes livePulse {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 50, 50, 0.5);
            }
            50% {
                box-shadow: 0 0 12px 4px rgba(255, 50, 50, 0.3);
            }
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
        }
        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 0;
            transition: all var(--transition-fast);
        }
        .btn-text:hover {
            color: #fff;
            gap: 10px;
        }

        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 左侧导航 */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            z-index: 100;
            display: flex;
            flex-direction: column;
            border-right: 1px solid var(--border-subtle);
            overflow-y: auto;
            padding: 0;
            transition: transform var(--transition-smooth);
        }
        .sidebar-nav .nav-brand {
            padding: 24px 20px 16px;
            border-bottom: 1px solid var(--border-subtle);
        }
        .sidebar-nav .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: 0.04em;
        }
        .sidebar-nav .nav-brand .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent-cyan-glow);
            border-radius: var(--radius-md);
            color: var(--accent-cyan);
            font-size: 1.1rem;
        }
        .nav-list {
            list-style: none;
            padding: 12px 0;
            margin: 0;
            flex: 1;
        }
        .nav-list li {
            margin: 0;
        }
        .nav-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            position: relative;
        }
        .nav-list li a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.05);
            border-left-color: var(--accent-cyan-light);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }
        .nav-list li a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.08);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
            text-shadow: 0 0 4px rgba(0, 240, 255, 0.2);
        }
        .nav-list li a .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .nav-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* 主内容区 */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* 移动端导航按钮 */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 200;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            font-size: 1.2rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-card);
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 99;
            cursor: pointer;
        }

        /* Hero */
        .hero-section {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 520px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 20, 0.92) 0%, rgba(26, 31, 46, 0.7) 50%, rgba(11, 14, 20, 0.85) 100%);
            z-index: 1;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 80px 0;
        }
        .hero-inner .section-container {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 48px;
            align-items: center;
        }
        .hero-text h1 {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .hero-text h1 .highlight {
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-text .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-team-card {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-glow);
            backdrop-filter: blur(10px);
        }
        .hero-team-card .team-status {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.04em;
        }
        .hero-team-card .team-count {
            font-family: var(--font-mono);
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 4px;
            text-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
        }
        .hero-team-card .team-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .hero-team-card .team-progress {
            height: 6px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 3px;
            margin: 12px 0 16px;
            overflow: hidden;
        }
        .hero-team-card .team-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #00F0FF, #00B8D4);
            border-radius: 3px;
            width: 60%;
            transition: width 1s ease;
        }
        .hero-team-card .team-avatars {
            display: flex;
            justify-content: center;
            gap: -8px;
            margin-bottom: 16px;
        }
        .hero-team-card .team-avatar-dot {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 2px solid var(--border-strong);
            background: var(--bg-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--accent-cyan);
            margin: 0 -4px;
        }
        .hero-team-card .team-avatar-dot.more {
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .hero-team-card .team-cta-row {
            display: flex;
            gap: 10px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-team-card .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-pill);
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-smooth);
            border: none;
            letter-spacing: 0.02em;
        }
        .btn-sm-primary {
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            color: #1A1F2E;
        }
        .btn-sm-primary:hover {
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }
        .btn-sm-outline {
            background: transparent;
            color: var(--accent-gold);
            border: 1.5px solid var(--accent-gold);
        }
        .btn-sm-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
        }

        /* 板块通用 */
        .section-block {
            padding: 64px 0;
        }
        .section-block.alt-bg {
            background: var(--bg-secondary);
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 36px;
            line-height: 1.6;
        }
        .section-title-row {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-title-row .section-title {
            margin-bottom: 8px;
        }

        /* 比分卡片网格 */
        .score-cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 20px;
        }
        .score-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .score-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }
        .score-card .card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 14px;
        }
        .score-card .game-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: var(--accent-cyan-glow);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border-subtle);
        }
        .score-card .match-teams {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-bottom: 10px;
        }
        .score-card .team-info {
            text-align: center;
            flex: 1;
        }
        .score-card .team-name {
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            margin-bottom: 2px;
        }
        .score-card .team-score {
            font-family: var(--font-mono);
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
        }
        .score-card .vs-divider {
            font-family: var(--font-mono);
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 600;
            flex-shrink: 0;
        }
        .score-card .card-meta {
            display: flex;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .score-card .card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .score-card .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #ff4d4d;
            display: inline-block;
            animation: livePulse 1.5s ease-in-out infinite;
        }

        /* 特色亮点 */
        .features-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .feature-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--accent-cyan-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            border: 1px solid var(--border-subtle);
        }
        .feature-card h4 {
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* 流程步骤 */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 24px 18px;
            text-align: center;
            position: relative;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .step-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            color: #1A1F2E;
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 12px;
            font-family: var(--font-mono);
        }
        .step-card h4 {
            font-weight: 700;
            color: #fff;
            font-size: 1rem;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 覆盖范围 */
        .coverage-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            text-align: center;
        }
        .coverage-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px 12px;
            transition: all var(--transition-smooth);
        }
        .coverage-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            background: var(--bg-card-hover);
        }
        .coverage-item .cov-icon {
            font-size: 1.8rem;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }
        .coverage-item .cov-name {
            font-weight: 600;
            color: #fff;
            font-size: 0.9rem;
            margin-bottom: 4px;
        }
        .coverage-item .cov-count {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--accent-gold);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .faq-item:hover {
            border-color: var(--border-strong);
        }
        .faq-question {
            padding: 16px 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            color: #fff;
            font-size: 0.95rem;
            user-select: none;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: rgba(0, 240, 255, 0.04);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
            margin: 0;
        }

        /* CTA条 */
        .cta-strip {
            background: var(--bg-secondary);
            border-top: 2px solid var(--border-strong);
            border-bottom: 2px solid var(--border-strong);
            padding: 40px 0;
            text-align: center;
        }
        .cta-strip h3 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-strip p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        /* 底部固定条 */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: var(--sidebar-width);
            right: 0;
            background: rgba(11, 14, 20, 0.94);
            border-top: 1px solid var(--border-strong);
            padding: 12px 24px;
            z-index: 90;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            backdrop-filter: blur(12px);
            flex-wrap: wrap;
            transition: transform var(--transition-smooth);
        }
        .sticky-bottom-bar .sticky-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .sticky-bottom-bar .btn-primary {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        /* 页脚 */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.78rem;
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-links span {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar-nav {
                transform: translateX(-100%);
                width: 260px;
                z-index: 150;
            }
            .sidebar-nav.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .mobile-nav-overlay.active {
                display: block;
            }
            .hero-inner .section-container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-team-card {
                max-width: 380px;
                margin: 0 auto;
            }
            .hero-text h1 {
                font-size: 2rem;
            }
            .features-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .coverage-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .score-cards-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .sticky-bottom-bar {
                left: 0;
                padding: 10px 16px;
                gap: 12px;
            }
            .section-block {
                padding: 40px 0;
            }
        }
        @media (max-width: 640px) {
            .hero-text h1 {
                font-size: 1.5rem;
            }
            .hero-text .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .features-row {
                grid-template-columns: 1fr;
            }
            .steps-row {
                grid-template-columns: 1fr;
            }
            .coverage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .footer-links {
                justify-content: center;
                gap: 10px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .score-card .team-score {
                font-size: 1.5rem;
            }
            .hero-team-card .team-count {
                font-size: 2.5rem;
            }
            .sticky-bottom-bar {
                flex-direction: column;
                text-align: center;
                padding: 10px 12px;
                gap: 8px;
            }
            .sticky-bottom-bar .sticky-text {
                font-size: 0.8rem;
            }
            .section-container {
                padding: 0 16px;
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }

        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }

        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }

        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        .text-cyan {
            color: var(--accent-cyan);
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }

        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
        }

        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 0;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .btn-text:hover {
            color: #fff;
            gap: 10px;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }

        .btn-text i {
            transition: transform var(--transition-fast);
        }

        .btn-text:hover i {
            transform: translateX(3px);
        }

        /* Sidebar Navigation */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            padding: 0;
            border-right: 1px solid var(--border-subtle);
            overflow-y: auto;
            transition: transform var(--transition-smooth);
        }

        .nav-brand {
            padding: 20px 18px;
            border-bottom: 1px solid var(--border-subtle);
            flex-shrink: 0;
        }

        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            font-family: var(--font-heading);
            letter-spacing: 0.03em;
            text-decoration: none;
        }

        .nav-brand a:hover {
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
            color: #fff;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent-cyan), #00B8D4);
            border-radius: var(--radius-md);
            color: #0B0E14;
            font-size: 1rem;
        }

        .nav-list {
            list-style: none;
            padding: 12px 0;
            margin: 0;
            flex: 1;
        }

        .nav-list li {
            margin: 0;
        }

        .nav-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 18px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            text-decoration: none;
            letter-spacing: 0.02em;
        }

        .nav-list li a:hover {
            background: rgba(0, 240, 255, 0.05);
            color: #fff;
            border-left-color: var(--accent-cyan-light);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.4);
        }

        .nav-list li a.active {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.35);
        }

        .nav-icon {
            width: 22px;
            text-align: center;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .nav-footer {
            padding: 14px 18px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.72rem;
            color: var(--text-muted);
            flex-shrink: 0;
            letter-spacing: 0.03em;
        }

        /* Mobile menu toggle */
        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 1100;
            width: 40px;
            height: 40px;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            color: var(--accent-cyan);
            font-size: 1.3rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow);
        }

        /* Main Content Area */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: calc(100% - var(--sidebar-width));
        }

        .section-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 60px 32px;
            width: 100%;
        }

        .section-container-sm {
            max-width: 900px;
            margin: 0 auto;
            padding: 50px 32px;
            width: 100%;
        }

        /* Hero Section */
        .category-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 20, 0.82) 0%, rgba(26, 31, 46, 0.9) 100%);
            z-index: 1;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 750px;
            padding: 0 24px;
        }

        .category-hero .hero-badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid var(--border-subtle);
            margin-bottom: 16px;
        }

        .category-hero h1 {
            font-family: var(--font-heading);
            font-size: 2.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
            text-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
            line-height: 1.3;
        }

        .category-hero h1 span {
            color: var(--accent-cyan);
        }

        .category-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        .category-hero .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* Content Grid */
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
            align-items: start;
        }

        .content-main {
            min-width: 0;
        }

        .content-sidebar {
            position: sticky;
            top: 24px;
        }

        /* Section Titles */
        .section-title {
            font-family: var(--font-heading);
            font-size: 1.7rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 28px;
            letter-spacing: 0.02em;
        }

        /* Feature Cards */
        .feature-cards-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 22px 18px;
            text-align: center;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }

        .feature-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }

        .feature-card .fc-icon {
            width: 50px;
            height: 50px;
            margin: 0 auto 14px;
            background: var(--accent-cyan-glow);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            border: 1px solid var(--border-subtle);
        }

        .feature-card h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .feature-card p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin: 0;
        }

        /* API Cards */
        .api-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .api-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .api-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }

        .api-card .api-method {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.04em;
            width: fit-content;
        }

        .api-method-get {
            background: rgba(0, 200, 100, 0.15);
            color: #00C864;
            border: 1px solid rgba(0, 200, 100, 0.3);
        }

        .api-method-ws {
            background: rgba(255, 160, 0, 0.15);
            color: #FFA000;
            border: 1px solid rgba(255, 160, 0, 0.3);
        }

        .api-method-post {
            background: rgba(100, 140, 255, 0.15);
            color: #648CFF;
            border: 1px solid rgba(100, 140, 255, 0.3);
        }

        .api-card h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.02em;
            margin: 0;
        }

        .api-card .api-endpoint {
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--text-muted);
            background: rgba(0, 0, 0, 0.3);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            word-break: break-all;
            letter-spacing: 0.02em;
        }

        .api-card p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin: 0;
            flex: 1;
        }

        .api-card .api-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .api-tag {
            font-size: 0.7rem;
            padding: 3px 8px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            border: 1px solid rgba(255, 255, 255, 0.1);
            letter-spacing: 0.02em;
        }

        /* Steps */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            counter-reset: step-counter;
        }

        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }

        .step-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }

        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), #00B8D4);
            color: #0B0E14;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
        }

        .step-body h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
            letter-spacing: 0.02em;
        }

        .step-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* Sidebar */
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-subtle);
        }

        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-card ul li {
            padding: 7px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .sidebar-card ul li:last-child {
            border-bottom: none;
        }

        .sidebar-card ul li a {
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .sidebar-tag {
            font-size: 0.75rem;
            padding: 5px 12px;
            border-radius: var(--radius-pill);
            background: rgba(0, 240, 255, 0.06);
            color: var(--text-secondary);
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .sidebar-tag:hover {
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            border-color: var(--border-strong);
            text-shadow: none;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
        }

        .faq-item.active {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            width: 100%;
            background: none;
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            padding: 16px 20px;
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            letter-spacing: 0.02em;
            border: none;
            font-family: var(--font-body);
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-fast);
            color: var(--accent-cyan);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent-cyan);
            background: var(--accent-cyan-glow);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 20px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.08) 0%, rgba(0, 184, 212, 0.05) 100%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .cta-banner h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .cta-banner p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 18px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 20px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-bottom: 24px;
        }

        .footer-col h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .footer-col p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 6px;
        }

        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 16px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .footer-links a {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .footer-links a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }

        .footer-links span {
            color: var(--text-muted);
        }

        /* Overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 999;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .feature-cards-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .api-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .sidebar-card {
                margin-bottom: 0;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
            }

            .sidebar-nav {
                transform: translateX(-100%);
                width: 260px;
            }

            .sidebar-nav.open {
                transform: translateX(0);
            }

            .sidebar-overlay.active {
                display: block;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                width: 100%;
            }

            .section-container {
                padding: 36px 16px;
            }
            .section-container-sm {
                padding: 32px 16px;
            }

            .feature-cards-row {
                grid-template-columns: 1fr 1fr;
            }
            .api-cards-grid {
                grid-template-columns: 1fr;
            }
            .content-sidebar {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .category-hero {
                min-height: 340px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-desc {
                font-size: 0.9rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cta-banner {
                padding: 24px 18px;
            }
            .cta-banner h3 {
                font-size: 1.15rem;
            }
            .step-item {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            .step-num {
                margin: 0 auto;
            }
        }

        @media (max-width: 520px) {
            .feature-cards-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 1.35rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --bg-section-alt: #151A26;
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }
        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            color: var(--text-primary);
            margin-top: 0;
            line-height: 1.35;
        }
        h1 {
            font-size: 2.25rem;
            font-weight: 700;
        }
        h2 {
            font-size: 1.75rem;
            font-weight: 700;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }

        .text-cyan {
            color: var(--accent-cyan);
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
        }
        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
        }
        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px 0;
            transition: all var(--transition-fast);
        }
        .btn-text:hover {
            color: #fff;
            gap: 10px;
        }

        /* Sidebar Navigation */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            z-index: 100;
            display: flex;
            flex-direction: column;
            border-right: 1px solid var(--border-subtle);
            overflow-y: auto;
            transition: transform var(--transition-smooth);
        }
        .sidebar-nav .nav-brand {
            padding: 22px 20px;
            border-bottom: 1px solid var(--border-subtle);
        }
        .sidebar-nav .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-heading);
            letter-spacing: 0.03em;
            text-shadow: none;
        }
        .sidebar-nav .nav-brand a:hover {
            text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
        }
        .sidebar-nav .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            border-radius: var(--radius-sm);
            color: #0B0E14;
            font-size: 1rem;
        }
        .sidebar-nav .nav-list {
            list-style: none;
            margin: 0;
            padding: 12px 0;
            flex: 1;
        }
        .sidebar-nav .nav-list li {
            margin: 0;
        }
        .sidebar-nav .nav-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            text-shadow: none;
        }
        .sidebar-nav .nav-list a:hover {
            background: rgba(0, 240, 255, 0.05);
            color: #fff;
            border-left-color: var(--accent-cyan-light);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }
        .sidebar-nav .nav-list a.active {
            background: rgba(0, 240, 255, 0.08);
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
        }
        .sidebar-nav .nav-icon {
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .sidebar-nav .nav-footer {
            padding: 14px 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .sidebar-nav .nav-close-btn {
            display: none;
            position: absolute;
            top: 14px;
            right: 14px;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.4rem;
            cursor: pointer;
            z-index: 10;
        }

        /* Mobile top bar */
        .mobile-top-bar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--bg-secondary);
            z-index: 99;
            align-items: center;
            padding: 0 16px;
            border-bottom: 1px solid var(--border-subtle);
        }
        .mobile-top-bar .mobile-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            font-family: var(--font-heading);
        }
        .mobile-top-bar .mobile-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            border-radius: var(--radius-sm);
            color: #0B0E14;
            font-size: 0.85rem;
        }
        .mobile-top-bar .hamburger-btn {
            margin-left: auto;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 6px;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 98;
        }
        .sidebar-overlay.active {
            display: block;
        }

        /* Main content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            padding-top: 0;
        }

        .section-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 28px;
        }
        .section-padding {
            padding: 60px 0;
        }
        .section-padding-sm {
            padding: 40px 0;
        }

        /* Hero */
        .hero-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            min-height: 420px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 20, 0.88) 0%, rgba(26, 31, 46, 0.78) 50%, rgba(11, 14, 20, 0.9) 100%);
            z-index: 1;
        }
        .hero-section .hero-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
        }
        .hero-section .hero-badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid var(--border-subtle);
            margin-bottom: 16px;
        }
        .hero-section h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .hero-section h1 span {
            color: var(--accent-cyan);
        }
        .hero-section .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-section .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Stats strip */
        .stats-strip {
            background: var(--bg-section-alt);
            border-bottom: 1px solid var(--border-subtle);
            padding: 24px 0;
        }
        .stats-strip .stat-item {
            text-align: center;
            padding: 10px 16px;
        }
        .stats-strip .stat-value {
            font-family: var(--font-mono);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent-cyan);
            line-height: 1.2;
        }
        .stats-strip .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Cards */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-strong);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }
        .card .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 14px;
        }
        .card .card-img img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }
        .card .card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .card .card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        /* Data dimension cards */
        .dimension-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-smooth);
            height: 100%;
        }
        .dimension-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .dimension-card .dim-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }
        .dimension-card h4 {
            color: #fff;
            margin-bottom: 8px;
        }
        .dimension-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 0;
        }

        /* Info block */
        .info-block {
            display: flex;
            gap: 40px;
            align-items: center;
            flex-wrap: wrap;
        }
        .info-block .info-text {
            flex: 1;
            min-width: 280px;
        }
        .info-block .info-text h2 {
            margin-bottom: 16px;
            color: #fff;
        }
        .info-block .info-text p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            margin-bottom: 12px;
        }
        .info-block .info-image {
            flex: 1;
            min-width: 280px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
        }
        .info-block .info-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .info-block.reverse {
            flex-direction: row-reverse;
        }

        /* Scenario cards */
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition-smooth);
            height: 100%;
        }
        .scenario-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .scenario-card .sc-icon {
            font-size: 2rem;
            color: var(--accent-gold);
            margin-bottom: 14px;
        }
        .scenario-card h4 {
            color: #fff;
            margin-bottom: 8px;
        }
        .scenario-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 0;
        }

        /* Steps */
        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 18px 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            color: #0B0E14;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            font-family: var(--font-mono);
        }
        .step-item .step-body h4 {
            color: #fff;
            margin-bottom: 4px;
        }
        .step-item .step-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin: 0;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            color: #fff;
            font-size: 0.95rem;
            user-select: none;
            transition: background var(--transition-fast);
            gap: 12px;
        }
        .faq-item .faq-question:hover {
            background: rgba(0, 240, 255, 0.04);
        }
        .faq-item .faq-icon {
            flex-shrink: 0;
            font-size: 1rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-item .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
        .faq-item.open {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }

        /* CTA section */
        .cta-section {
            background: var(--bg-section-alt);
            text-align: center;
            padding: 50px 0;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 550px;
            margin: 0 auto 24px;
            font-size: 0.95rem;
        }
        .cta-section .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0 24px;
            color: var(--text-secondary);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 28px;
        }
        .site-footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .site-footer .footer-col p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: var(--text-muted);
        }
        .site-footer .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
        }
        .site-footer .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }
        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            padding-top: 18px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent-cyan);
            text-shadow: none;
        }
        .site-footer .footer-links span {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* Section title */
        .section-title {
            margin-bottom: 32px;
        }
        .section-title h2 {
            color: #fff;
            margin-bottom: 8px;
        }
        .section-title .title-line {
            display: inline-block;
            width: 50px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 2px;
            margin-bottom: 10px;
        }
        .section-title p {
            color: var(--text-secondary);
            max-width: 600px;
            font-size: 0.95rem;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .sidebar-nav {
                transform: translateX(-100%);
                box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
            }
            .sidebar-nav.open {
                transform: translateX(0);
            }
            .sidebar-nav .nav-close-btn {
                display: block;
            }
            .mobile-top-bar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 56px;
            }
            :root {
                --sidebar-width: 0px;
            }
            .hero-section h1 {
                font-size: 1.75rem;
            }
            .hero-section .hero-desc {
                font-size: 0.9rem;
            }
            .info-block {
                flex-direction: column !important;
                gap: 24px;
            }
            .info-block .info-image img {
                height: 220px;
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .section-padding {
                padding: 40px 0;
            }
            .stats-strip .stat-value {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 639px) {
            .hero-section {
                min-height: 340px;
            }
            .hero-section h1 {
                font-size: 1.45rem;
            }
            .hero-section .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-section .hero-actions .btn-primary,
            .hero-section .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-links {
                justify-content: center;
            }
            .section-container {
                padding: 0 16px;
            }
            .stats-strip .stat-item {
                padding: 8px 6px;
            }
            .stats-strip .stat-value {
                font-size: 1.2rem;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .card .card-img img {
                height: 140px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #1A1F2E;
            --bg-secondary: #0B0E14;
            --bg-card: rgba(20, 25, 35, 0.95);
            --bg-card-hover: rgba(24, 30, 42, 0.98);
            --accent-cyan: #00F0FF;
            --accent-cyan-light: rgba(0, 240, 255, 0.3);
            --accent-cyan-glow: rgba(0, 240, 255, 0.15);
            --accent-gold: #D4AF37;
            --accent-gold-light: rgba(212, 175, 55, 0.25);
            --text-primary: #EAEAEA;
            --text-secondary: #B0B5BD;
            --text-muted: #7A7F88;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --border-strong: rgba(0, 240, 255, 0.35);
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-pill: 25px;
            --shadow-card: 0 4px 12px rgba(0, 240, 255, 0.08);
            --shadow-card-hover: 0 8px 28px rgba(0, 240, 255, 0.16);
            --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --sidebar-width: 240px;
            --font-heading: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-body: 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
            --font-mono: 'Roboto Mono', 'Consolas', 'Courier New', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.8;
            min-height: 100vh;
            overflow-x: hidden;
            display: flex;
            flex-direction: row;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast), text-shadow var(--transition-fast);
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button {
            cursor: pointer;
            border: none;
            font-family: var(--font-body);
            transition: all var(--transition-smooth);
        }
        button:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 0.6em;
        }
        h1 {
            font-size: 2.25rem;
            font-weight: 700;
        }
        h2 {
            font-size: 1.75rem;
            font-weight: 700;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
        }

        p {
            margin-bottom: 1em;
            color: var(--text-secondary);
        }

        .text-cyan {
            color: var(--accent-cyan);
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .text-muted {
            color: var(--text-muted);
        }

        .badge {
            display: inline-block;
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-subtle);
            white-space: nowrap;
        }
        .badge-gold {
            background: var(--accent-gold-light);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }
        .badge-red {
            background: rgba(255, 70, 70, 0.2);
            color: #ff5555;
            border: 1px solid rgba(255, 70, 70, 0.35);
            animation: pulse-badge 1.5s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00F0FF 0%, #00B8D4 100%);
            color: #1A1F2E;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #fff 0%, #00F0FF 100%);
            color: #0B0E14;
            box-shadow: 0 6px 24px rgba(0, 240, 255, 0.4);
            transform: translateY(-2px);
            text-shadow: none;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-gold);
            padding: 11px 26px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--accent-gold);
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: var(--accent-gold-light);
            color: #fff;
            border-color: #fff;
            box-shadow: 0 0 16px rgba(212, 175, 55, 0.3);
            text-shadow: none;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
            letter-spacing: 0.04em;
        }

        .section-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding: 70px 0;
        }

        /* Sidebar Navigation */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-secondary);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            border-right: 1px solid var(--border-subtle);
            overflow-y: auto;
            flex-shrink: 0;
        }
        .sidebar-nav .nav-brand {
            padding: 22px 20px;
            border-bottom: 1px solid var(--border-subtle);
            flex-shrink: 0;
        }
        .sidebar-nav .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-heading);
            text-decoration: none;
            letter-spacing: 0.03em;
        }
        .sidebar-nav .nav-brand .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #00F0FF, #00B8D4);
            border-radius: var(--radius-md);
            color: #1A1F2E;
            font-size: 1.1rem;
        }
        .nav-list {
            list-style: none;
            padding: 16px 0;
            flex: 1;
            margin: 0;
        }
        .nav-list li {
            margin: 0;
        }
        .nav-list li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
            text-decoration: none;
            font-weight: 500;
        }
        .nav-list li a .nav-icon {
            width: 22px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .nav-list li a:hover {
            color: #fff;
            background: rgba(0, 240, 255, 0.05);
            text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
            border-left-color: var(--accent-cyan-light);
        }
        .nav-list li a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.1);
            border-left-color: var(--accent-cyan);
            font-weight: 600;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
        }
        .nav-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 0.75rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        /* Main Content */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            width: calc(100% - var(--sidebar-width));
        }

        /* Mobile nav toggle */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 12px;
            left: 12px;
            z-index: 1100;
            background: var(--bg-secondary);
            border: 1px solid var(--border-subtle);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            font-size: 1.3rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-card);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 999;
        }

        /* Hero Flash Sale Bar */
        .hero-flash {
            position: relative;
            background: linear-gradient(180deg, #0B0E14 0%, #1A1F2E 100%);
            min-height: 520px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-flash::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .hero-flash::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 40%, rgba(212, 175, 55, 0.06) 0%, transparent 50%);
            z-index: 1;
        }
        .hero-flash-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .flash-countdown-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            background: rgba(0, 0, 0, 0.55);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 18px 24px;
            margin-bottom: 32px;
            backdrop-filter: blur(10px);
        }
        .flash-countdown-bar .flash-label {
            font-weight: 700;
            color: #ff5555;
            font-size: 0.95rem;
            letter-spacing: 0.04em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .flash-countdown-bar .flash-label i {
            animation: flash-icon 0.8s ease-in-out infinite;
        }
        @keyframes flash-icon {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(1.3);
            }
        }
        .countdown-timer {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .countdown-timer .time-block {
            background: #ff4444;
            color: #fff;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 1.3rem;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            min-width: 44px;
            text-align: center;
            letter-spacing: 0.05em;
        }
        .countdown-timer .time-sep {
            color: #ff8888;
            font-weight: 700;
            font-size: 1.2rem;
        }
        .hero-flash-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .hero-flash-text h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 0%, #00F0FF 60%, #fff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            color: transparent;
        }
        .hero-flash-text .subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .hero-flash-card {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-glow);
            position: relative;
            overflow: hidden;
        }
        .hero-flash-card::before {
            content: '热门回放';
            position: absolute;
            top: 14px;
            right: -30px;
            background: #ff4444;
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 40px;
            transform: rotate(25deg);
            letter-spacing: 0.05em;
        }
        .hero-flash-card img {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .hero-flash-card .card-match-title {
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 6px;
        }
        .hero-flash-card .card-match-info {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .hero-flash-card .card-match-score {
            display: flex;
            gap: 16px;
            align-items: center;
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }

        /* Section Cards */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 1.8rem;
            color: #fff;
            margin-bottom: 10px;
        }
        .section-header .section-subtitle {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header.left-align {
            text-align: left;
        }
        .section-header.left-align .section-subtitle {
            margin: 0;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .info-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            background: var(--bg-card-hover);
        }
        .info-card .card-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: var(--radius-md);
            background: var(--accent-cyan-glow);
            color: var(--accent-cyan);
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
        .info-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: #fff;
        }
        .info-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Replay Card */
        .replay-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .replay-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .replay-card .replay-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .replay-card .replay-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition-smooth);
        }
        .replay-card:hover .replay-thumb img {
            transform: scale(1.04);
        }
        .replay-card .play-overlay {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.35);
            transition: background var(--transition-smooth);
        }
        .replay-card:hover .play-overlay {
            background: rgba(0, 0, 0, 0.2);
        }
        .play-overlay .play-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 240, 255, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #1A1F2E;
            font-size: 1.3rem;
            transition: all var(--transition-smooth);
        }
        .replay-card:hover .play-icon {
            background: #00F0FF;
            transform: scale(1.1);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
        }
        .replay-card .replay-body {
            padding: 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .replay-card .replay-body .replay-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .replay-card .replay-body h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .replay-card .replay-body .replay-summary {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
            flex: 1;
            margin-bottom: 12px;
        }
        .replay-card .replay-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        /* Feature Compare */
        .feature-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .feature-compare .feature-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card-hover);
        }
        .feature-compare .feature-text h3 {
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 14px;
        }
        .feature-compare .feature-text p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }
        .feature-list li {
            padding: 8px 0;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
        }
        .feature-list li i {
            color: var(--accent-cyan);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* Stats Bar */
        .stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-block {
            text-align: center;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 16px;
            transition: all var(--transition-smooth);
        }
        .stat-block:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .stat-block .stat-number {
            font-family: var(--font-mono);
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-block .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .faq-item.active {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-glow);
        }
        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: #fff;
            font-size: 1rem;
            user-select: none;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent-cyan);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            padding: 0 22px 18px;
            max-height: 300px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(180deg, rgba(0, 240, 255, 0.04) 0%, rgba(0, 0, 0, 0.3) 100%);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .cta-inner {
            text-align: center;
            padding: 50px 24px;
        }
        .cta-inner h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
            color: #fff;
        }
        .cta-inner p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        /* Sticky Bottom Bar */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: var(--sidebar-width);
            right: 0;
            background: rgba(26, 31, 46, 0.95);
            backdrop-filter: blur(16px);
            border-top: 1px solid var(--border-subtle);
            padding: 14px 24px;
            z-index: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
        }
        .sticky-bottom-bar .sticky-text {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
        }
        .sticky-bottom-bar .sticky-text span {
            color: var(--accent-cyan);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
            text-shadow: 0 0 6px rgba(0, 240, 255, 0.3);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .footer-links a,
        .footer-links span {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 0px;
            }
            .sidebar-nav {
                transform: translateX(-100%);
                transition: transform var(--transition-smooth);
                width: 260px;
                z-index: 1001;
            }
            .sidebar-nav.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .mobile-nav-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                width: 100%;
            }
            .sticky-bottom-bar {
                left: 0;
            }
            .hero-flash-grid {
                grid-template-columns: 1fr;
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-compare {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-flash-text h1 {
                font-size: 1.9rem;
            }
        }

        @media (max-width: 640px) {
            .section-padding {
                padding: 40px 0;
            }
            .card-grid,
            .card-grid.cols-2,
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
            }
            .stats-bar {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .flash-countdown-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .hero-flash-text h1 {
                font-size: 1.5rem;
            }
            .hero-flash {
                min-height: 400px;
            }
            .sticky-bottom-bar {
                flex-direction: column;
                gap: 10px;
                padding: 12px 16px;
            }
            .feature-compare .feature-text h3 {
                font-size: 1.25rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .stat-block .stat-number {
                font-size: 1.8rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }