/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #2563eb;
            --primary-rgb: 30, 64, 175;
            --accent: #0284c7;
            --accent-light: #0ea5e9;
            --accent-rgb: 2, 132, 199;
            --bg-page: #f8fafc;
            --bg-alt: #f1f5f9;
            --bg-white: #ffffff;
            --text-main: #0f172a;
            --text-secondary: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --border-light: #edf2f7;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-pill: 9999px;
            --shadow-subtle: 0 4px 6px -1px rgba(30, 64, 175, 0.04), 0 2px 4px -2px rgba(30, 64, 175, 0.03);
            --shadow-card: 0 10px 25px -5px rgba(30, 64, 175, 0.06), 0 8px 10px -6px rgba(30, 64, 175, 0.03);
            --shadow-hover: 0 20px 35px -8px rgba(30, 64, 175, 0.12), 0 10px 15px -5px rgba(30, 64, 175, 0.05);
            --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Base */
        *, *::before, *::after {
            box-sizing: border-box;
        }

        body {
            font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition-fast);
        }

        a:hover {
            color: var(--accent);
        }

        /* Typography Utility */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary-light);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(37, 99, 235, 0.15);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-header {
            max-width: 760px;
            margin: 0 auto 50px auto;
            text-align: center;
        }

        .section-title {
            font-size: 2.15rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.5px;
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin: 0 auto;
        }

        .section-padding {
            padding-top: 90px;
            padding-bottom: 90px;
        }

        /* Navbar Customization */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-fast);
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .navbar-brand i {
            color: var(--accent);
            font-size: 1.5rem;
        }

        .nav-link {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 8px 18px !important;
            border-radius: var(--radius-pill);
            transition: var(--transition-fast);
        }

        .nav-link:hover, .nav-link.active {
            color: var(--primary-light) !important;
            background: rgba(37, 99, 235, 0.06);
        }

        .btn-brand-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #ffffff;
            border: none;
            padding: 11px 26px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-pill);
            box-shadow: 0 4px 14px rgba(30, 64, 175, 0.25);
            transition: var(--transition-fast);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-brand-primary:hover {
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(30, 64, 175, 0.35);
        }

        .btn-brand-outline {
            background: #ffffff;
            color: var(--primary);
            border: 1.5px solid var(--border-color);
            padding: 10px 24px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-pill);
            transition: var(--transition-fast);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-brand-outline:hover {
            border-color: var(--primary-light);
            background: rgba(37, 99, 235, 0.04);
            color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* Standard Modern Card */
        .modern-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-fast);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .modern-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.25);
        }

        /* Section 1: Hero Visual Center */
        .hero-hub {
            padding: 95px 0 85px 0;
            background: radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(30, 64, 175, 0.05) 0%, transparent 40%),
                        #ffffff;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-title {
            font-size: 2.85rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -1px;
            line-height: 1.25;
            margin-bottom: 22px;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-lead {
            font-size: 1.08rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 34px;
        }

        .hero-card-preview {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(226, 232, 240, 0.8);
            box-shadow: 0 25px 50px -12px rgba(30, 64, 175, 0.12);
            padding: 24px;
            position: relative;
        }

        .hero-preview-screen {
            background: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
            border-radius: var(--radius-md);
            padding: 24px;
            color: #ffffff;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .hero-preview-screen::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 150px;
            height: 150px;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.3) 0%, transparent 70%);
        }

        .preview-badge-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(16, 185, 129, 0.15);
            color: #34d399;
            border: 1px solid rgba(16, 185, 129, 0.3);
            border-radius: var(--radius-pill);
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .preview-badge-status::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #34d399;
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.3); }
        }

        /* Section 2: Asymmetric Grid Matrix */
        .matrix-icon-box {
            width: 54px;
            height: 54px;
            background: rgba(37, 99, 235, 0.08);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-light);
            font-size: 1.4rem;
            margin-bottom: 20px;
        }

        /* Section 3: Stat Board */
        .stat-banner {
            background: linear-gradient(135deg, #f0f7ff 0%, #e0effe 100%);
            border-top: 1px solid rgba(186, 230, 253, 0.8);
            border-bottom: 1px solid rgba(186, 230, 253, 0.8);
            padding: 60px 0;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 8px;
            letter-spacing: -1px;
        }

        .stat-label {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }

        .stat-sub {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* Section 4: Workflow Steps */
        .flow-step-card {
            position: relative;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 30px 24px;
            box-shadow: var(--shadow-subtle);
            height: 100%;
        }

        .flow-step-num {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            margin-bottom: 18px;
            box-shadow: 0 4px 10px rgba(30, 64, 175, 0.25);
        }

        /* Section 5: Media Showcase Cards */
        .media-poster-box {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .media-poster-box img, .media-poster-box .mock-poster {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-fast);
        }

        .media-poster-box:hover .mock-poster {
            transform: scale(1.04);
        }

        .play-indicator-overlay {
            position: absolute;
            width: 48px;
            height: 48px;
            background: rgba(255, 255, 255, 0.85);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.15rem;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
            transition: var(--transition-fast);
        }

        .media-poster-box:hover .play-indicator-overlay {
            transform: scale(1.15);
            background: #ffffff;
            color: var(--accent);
        }

        .pill-duration {
            position: absolute;
            bottom: 10px;
            right: 10px;
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(4px);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: var(--radius-sm);
        }

        .pill-resolution {
            position: absolute;
            top: 10px;
            left: 10px;
            background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
            color: #ffffff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            text-transform: uppercase;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
        }

        /* Section 6: Quality Comparison */
        .compare-box {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            background: #ffffff;
            padding: 36px;
            box-shadow: var(--shadow-card);
        }

        .compare-side {
            background: var(--bg-alt);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            height: 100%;
        }

        .compare-side.enhanced {
            background: linear-gradient(145deg, #eff6ff 0%, #dbeafe 100%);
            border-color: rgba(37, 99, 235, 0.25);
            position: relative;
        }

        /* Section 7: News and Insights */
        .news-focus-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            height: 100%;
        }

        .news-list-item {
            padding: 18px 20px;
            border-radius: var(--radius-md);
            background: #ffffff;
            border: 1px solid var(--border-color);
            margin-bottom: 14px;
            transition: var(--transition-fast);
        }

        .news-list-item:hover {
            border-color: var(--primary-light);
            transform: translateX(4px);
            box-shadow: var(--shadow-subtle);
        }

        /* Section 8: Multi-terminal */
        .device-badge-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 20px;
        }

        .device-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            background: #ffffff;
            border: 1px solid var(--border-color);
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        /* Section 9: Partner Logos */
        .partner-logo-cell {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition-fast);
            box-shadow: var(--shadow-subtle);
        }

        .partner-logo-cell:hover {
            color: var(--primary);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        /* Section 10: FAQ Accordion */
        .custom-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            background: #ffffff;
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }

        .custom-accordion .accordion-button {
            font-weight: 700;
            color: var(--text-main);
            font-size: 1.02rem;
            padding: 20px 24px;
            background: #ffffff;
            box-shadow: none;
        }

        .custom-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.04);
            border-bottom: 1px solid var(--border-color);
        }

        .custom-accordion .accordion-body {
            padding: 20px 24px;
            color: var(--text-secondary);
            font-size: 0.94rem;
            line-height: 1.8;
        }

        /* Section 11: Security Badges */
        .security-banner {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            box-shadow: var(--shadow-card);
        }

        .security-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .security-icon-circle {
            width: 46px;
            height: 46px;
            min-width: 46px;
            border-radius: 50%;
            background: rgba(14, 165, 233, 0.1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }

        /* Section 12: CTA Box */
        .cta-box-wrapper {
            background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #0369a1 100%);
            border-radius: var(--radius-lg);
            padding: 70px 40px;
            color: #ffffff;
            text-align: center;
            box-shadow: 0 20px 40px -10px rgba(30, 64, 175, 0.4);
            position: relative;
            overflow: hidden;
        }

        .cta-box-wrapper::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        /* Footer */
        .site-footer {
            background: #ffffff;
            border-top: 1px solid var(--border-color);
            padding: 70px 0 35px 0;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

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

        .footer-list li {
            margin-bottom: 10px;
        }

        .footer-list a {
            color: var(--text-secondary);
            font-size: 0.92rem;
        }

        .footer-list a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 50px;
            padding-top: 25px;
            border-top: 1px solid var(--border-color);
            text-align: center;
            font-size: 0.84rem;
        }

        /* Responsive Breakpoints */
        @media (max-width: 991.98px) {
            .hero-title { font-size: 2.2rem; }
            .section-title { font-size: 1.85rem; }
            .section-padding { padding-top: 65px; padding-bottom: 65px; }
            .cta-box-wrapper { padding: 50px 24px; }
        }

        @media (max-width: 767.98px) {
            .hero-title { font-size: 1.85rem; }
            .section-title { font-size: 1.6rem; }
            .modern-card { padding: 24px 20px; }
            .stat-banner { padding: 40px 0; }
        }

/* roulang page: category1 */
:root {
      --primary: #1e40af;
      --primary-light: #2563eb;
      --primary-rgb: 30, 64, 175;
      --accent: #0284c7;
      --accent-light: #0ea5e9;
      --accent-rgb: 2, 132, 199;
      --bg-page: #f8fafc;
      --bg-alt: #f1f5f9;
      --bg-white: #ffffff;
      --text-main: #0f172a;
      --text-secondary: #334155;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --border-light: #edf2f7;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --shadow-subtle: 0 4px 6px -1px rgba(30, 64, 175, 0.04), 0 2px 4px -2px rgba(30, 64, 175, 0.03);
      --shadow-card: 0 10px 25px -5px rgba(30, 64, 175, 0.06), 0 8px 10px -6px rgba(30, 64, 175, 0.03);
      --shadow-hover: 0 20px 35px -8px rgba(30, 64, 175, 0.12), 0 10px 15px -5px rgba(30, 64, 175, 0.05);
      --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    body {
      font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition-fast);
    }
    a:hover {
      color: var(--accent);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1020;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition-fast);
    }
    .navbar-brand {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .navbar-brand i {
      color: var(--accent);
      font-size: 1.5rem;
    }
    .nav-link {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-secondary);
      padding: 8px 18px !important;
      border-radius: var(--radius-pill);
      transition: var(--transition-fast);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-light) !important;
      background: rgba(37, 99, 235, 0.06);
    }
    .btn-brand-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #ffffff;
      border: none;
      padding: 11px 26px;
      font-weight: 600;
      font-size: 0.95rem;
      border-radius: var(--radius-pill);
      box-shadow: 0 4px 14px rgba(30, 64, 175, 0.25);
      transition: var(--transition-fast);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-brand-primary:hover {
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(30, 64, 175, 0.35);
    }
    .btn-brand-outline {
      background: #ffffff;
      color: var(--primary);
      border: 1.5px solid var(--border-color);
      padding: 10px 24px;
      font-weight: 600;
      font-size: 0.95rem;
      border-radius: var(--radius-pill);
      transition: var(--transition-fast);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .btn-brand-outline:hover {
      border-color: var(--primary-light);
      background: rgba(37, 99, 235, 0.04);
      color: var(--primary-light);
      transform: translateY(-2px);
    }
    .modern-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      transition: var(--transition-fast);
      position: relative;
      overflow: hidden;
    }
    .modern-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(37, 99, 235, 0.25);
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(37, 99, 235, 0.08);
      color: var(--primary-light);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(37, 99, 235, 0.15);
      margin-bottom: 12px;
    }
    .section-header {
      max-width: 760px;
      margin: 0 auto 45px auto;
      text-align: center;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      line-height: 1.35;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin: 0 auto;
    }
    .section-padding {
      padding-top: 85px;
      padding-bottom: 85px;
    }
    /* Enhanced Breadcrumb Nav */
    .breadcrumb-strip {
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      padding: 14px 0;
    }
    .breadcrumb-item a {
      color: var(--text-muted);
      font-size: 0.9rem;
      font-weight: 500;
    }
    .breadcrumb-item a:hover {
      color: var(--primary);
    }
    .breadcrumb-item.active {
      color: var(--primary);
      font-weight: 600;
      font-size: 0.9rem;
    }
    .breadcrumb-item + .breadcrumb-item::before {
      color: var(--text-muted);
      content: "›";
      font-size: 1.1rem;
      line-height: 1;
      vertical-align: middle;
    }
    .btn-back-nav {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-secondary);
      border: 1px solid var(--border-color);
      background: #ffffff;
      padding: 5px 14px;
      border-radius: var(--radius-pill);
      transition: var(--transition-fast);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-back-nav:hover {
      background: var(--bg-alt);
      color: var(--primary);
      border-color: var(--primary-light);
    }

    /* Section 1: Header Category Banner */
    .category-header-wrap {
      background: linear-gradient(180deg, #ffffff 0%, var(--bg-alt) 100%);
      border-bottom: 1px solid var(--border-color);
      padding: 55px 0;
    }
    .channel-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(2, 132, 199, 0.1);
      color: var(--accent);
      border: 1px solid rgba(2, 132, 199, 0.2);
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
    }

    /* Section 2: Matrix Filters */
    .filter-matrix-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px 30px;
      box-shadow: var(--shadow-subtle);
    }
    .filter-row {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
    }
    .filter-row:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .filter-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-secondary);
      min-width: 80px;
      padding-top: 5px;
    }
    .filter-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .filter-pill {
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-secondary);
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 5px 14px;
      border-radius: var(--radius-pill);
      cursor: pointer;
      transition: var(--transition-fast);
      user-select: none;
    }
    .filter-pill:hover {
      border-color: var(--primary-light);
      color: var(--primary-light);
      background: #ffffff;
    }
    .filter-pill.active {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      box-shadow: 0 3px 8px rgba(30, 64, 175, 0.25);
    }

    /* Section 3: Media Cards & Grid */
    .media-stream-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
      transition: var(--transition-fast);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .media-stream-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(37, 99, 235, 0.25);
    }
    .media-thumbnail-wrap {
      position: relative;
      aspect-ratio: 16 / 9;
      background: #1e293b;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-thumbnail-bg {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.85;
      transition: transform 0.4s ease;
    }
    .media-stream-card:hover .media-thumbnail-bg {
      transform: scale(1.05);
    }
    .play-floating-icon {
      position: absolute;
      width: 46px;
      height: 46px;
      background: rgba(30, 64, 175, 0.85);
      backdrop-filter: blur(4px);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-size: 1.1rem;
      opacity: 0.9;
      transition: var(--transition-fast);
      box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    }
    .media-stream-card:hover .play-floating-icon {
      background: var(--accent);
      transform: scale(1.12);
      opacity: 1;
    }
    .thumb-tag-duration {
      position: absolute;
      bottom: 8px;
      right: 8px;
      background: rgba(15, 23, 42, 0.8);
      backdrop-filter: blur(4px);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .thumb-tag-quality {
      position: absolute;
      top: 8px;
      left: 8px;
      background: rgba(2, 132, 199, 0.9);
      color: #ffffff;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
      letter-spacing: 0.5px;
    }
    .media-info-body {
      padding: 18px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 8px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      height: 3.1rem;
    }
    .media-stream-card:hover .media-title {
      color: var(--primary-light);
    }
    .media-meta-bar {
      margin-top: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-muted);
      padding-top: 10px;
      border-top: 1px solid var(--border-light);
    }

    /* Section 4: Hot Ranking */
    .ranking-item-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      gap: 16px;
      box-shadow: var(--shadow-subtle);
      transition: var(--transition-fast);
    }
    .ranking-item-card:hover {
      border-color: var(--primary-light);
      transform: translateX(4px);
    }
    .rank-num {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.15rem;
      flex-shrink: 0;
    }
    .rank-top1 { background: #fee2e2; color: #dc2626; }
    .rank-top2 { background: #ffedd5; color: #ea580c; }
    .rank-top3 { background: #fef3c7; color: #d97706; }
    .rank-default { background: var(--bg-alt); color: var(--text-muted); }

    /* Section 5: Specification Table */
    .specs-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .specs-table th {
      background: var(--bg-alt);
      color: var(--text-secondary);
      font-weight: 700;
      font-size: 0.9rem;
      padding: 14px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .specs-table td {
      padding: 14px 20px;
      font-size: 0.9rem;
      color: var(--text-secondary);
      border-bottom: 1px solid var(--border-light);
    }
    .specs-table tr:last-child td {
      border-bottom: none;
    }

    /* Section 6: Large Showcase Cards */
    .scene-big-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }
    .scene-big-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 6px;
      height: 100%;
      background: var(--primary-light);
    }
    .scene-big-card.scene-alt::before {
      background: var(--accent);
    }

    /* Section 7: FAQ Accordion */
    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md) !important;
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-subtle);
    }
    .accordion-button {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      padding: 18px 24px;
      background: #ffffff;
    }
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background: rgba(37, 99, 235, 0.04);
      box-shadow: none;
    }
    .accordion-body {
      color: var(--text-secondary);
      font-size: 0.92rem;
      line-height: 1.8;
      padding: 20px 24px;
      background: #ffffff;
    }

    /* Footer */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 70px 0 35px 0;
      color: var(--text-secondary);
    }
    .footer-brand {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 14px;
    }
    .footer-brand i {
      color: var(--accent);
    }
    .footer-list {
      list-style: none;
      padding-left: 0;
      margin-bottom: 0;
    }
    .footer-list li {
      margin-bottom: 10px;
    }
    .footer-list a {
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .footer-list a:hover {
      color: var(--primary);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-light);
      margin-top: 45px;
      padding-top: 25px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    @media (max-width: 991px) {
      .section-padding {
        padding-top: 60px;
        padding-bottom: 60px;
      }
      .section-title {
        font-size: 1.8rem;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}