/* roulang page: index */
:root {
            --bs-body-bg: #070B14;
            --bs-body-color: #E2E8F0;
            --primary-blue: #0066FF;
            --accent-cyan: #00E5FF;
            --tech-dark-bg: #070B14;
            --glass-card-bg: rgba(13, 27, 62, 0.55);
            --glass-card-border: rgba(0, 229, 255, 0.15);
            --glass-card-hover: rgba(0, 229, 255, 0.35);
            --text-title: #FFFFFF;
            --text-subtitle: #94A3B8;
            --text-muted: #64748B;
            --gradient-primary: linear-gradient(135deg, #0052D4 0%, #4364F7 50%, #6FB1FC 100%);
            --glow-shadow: 0 0 24px rgba(0, 102, 255, 0.45);
            --cyan-glow: 0 0 20px rgba(0, 229, 255, 0.5);
            --card-radius: 16px;
            --btn-radius: 10px;
        }

        /* Base Resets */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        body {
            background-color: var(--bs-body-bg);
            color: var(--bs-body-color);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            line-height: 1.68;
            overflow-x: hidden;
            position: relative;
        }

        /* Deep Tech Background Accents */
        body::before {
            content: '';
            position: absolute;
            top: -150px;
            left: 50%;
            transform: translateX(-50%);
            width: 1000px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 102, 255, 0.18) 0%, rgba(7, 11, 20, 0) 70%);
            pointer-events: none;
            z-index: 0;
        }
        .ambient-glow-2 {
            position: absolute;
            top: 1800px;
            right: -10%;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.12) 0%, rgba(7, 11, 20, 0) 70%);
            pointer-events: none;
            z-index: 0;
        }
        .ambient-glow-3 {
            position: absolute;
            top: 3600px;
            left: -10%;
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(67, 100, 247, 0.14) 0%, rgba(7, 11, 20, 0) 70%);
            pointer-events: none;
            z-index: 0;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--accent-cyan);
        }

        /* Floating Capsule Nav */
        .site-header {
            position: sticky;
            top: 18px;
            z-index: 1050;
            padding: 0 16px;
        }
        .floating-navbar {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(7, 11, 20, 0.78);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            border: 1px solid var(--glass-card-border);
            border-radius: 40px;
            padding: 10px 24px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            transition: border-color 0.3s ease;
        }
        .floating-navbar:hover {
            border-color: rgba(0, 229, 255, 0.35);
        }
        .navbar-brand-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: #FFFFFF !important;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon-sparkle {
            width: 32px;
            height: 32px;
            background: var(--gradient-primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            box-shadow: 0 0 12px var(--primary-blue);
            font-size: 0.95rem;
        }
        .nav-link-custom {
            color: #CBD5E1 !important;
            font-weight: 500;
            padding: 8px 18px !important;
            font-size: 0.95rem;
            border-radius: 20px;
            transition: all 0.25s ease;
        }
        .nav-link-custom:hover, .nav-link-custom.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 229, 255, 0.08);
        }
        .btn-nav-action {
            background: var(--gradient-primary);
            color: #FFFFFF !important;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: 30px;
            padding: 8px 22px;
            border: none;
            box-shadow: var(--glow-shadow);
            transition: all 0.3s ease;
        }
        .btn-nav-action:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.7);
        }

        /* Glassmorphism Cards */
        .glass-panel {
            background: var(--glass-card-bg);
            -webkit-backdrop-filter: blur(16px);
            backdrop-filter: blur(16px);
            border: 1px solid var(--glass-card-border);
            border-radius: var(--card-radius);
            box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            z-index: 1;
        }
        .glass-panel:hover {
            border-color: var(--glass-card-hover);
            box-shadow: 0 25px 50px -12px rgba(0, 102, 255, 0.25);
        }

        /* Section Commons */
        .section-block {
            padding: 80px 0;
            position: relative;
            z-index: 1;
        }
        .section-tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(0, 102, 255, 0.15);
            border: 1px solid rgba(0, 229, 255, 0.3);
            border-radius: 30px;
            color: var(--accent-cyan);
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .section-title {
            color: var(--text-title);
            font-weight: 800;
            font-size: 2.15rem;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .section-intro-text {
            color: var(--text-subtitle);
            font-size: 1.05rem;
            line-height: 1.75;
            max-width: 820px;
            margin: 0 auto 40px auto;
        }

        /* Glow Buttons */
        .btn-glow-primary {
            background: var(--gradient-primary);
            color: #FFFFFF;
            font-weight: 600;
            padding: 13px 32px;
            border-radius: var(--btn-radius);
            border: none;
            box-shadow: var(--glow-shadow);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-glow-primary:hover {
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.65);
        }
        .btn-glow-secondary {
            background: rgba(15, 23, 42, 0.85);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 13px 28px;
            border-radius: var(--btn-radius);
            border: 1px solid rgba(0, 229, 255, 0.3);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-glow-secondary:hover {
            color: #FFFFFF;
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
        }

        /* Hero Section */
        .hero-section {
            padding: 85px 0 70px 0;
            position: relative;
        }
        .hero-h1-title {
            font-size: 3.1rem;
            font-weight: 900;
            color: #FFFFFF;
            line-height: 1.22;
            letter-spacing: -1px;
            margin-bottom: 22px;
        }
        .hero-h1-title span {
            background: linear-gradient(90deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-description {
            font-size: 1.1rem;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 600px;
        }

        /* Hero Comparison Tiers Card (Right Column) */
        .hero-matrix-box {
            padding: 28px;
            border-radius: 20px;
            background: rgba(11, 21, 46, 0.7);
            border: 1px solid rgba(0, 229, 255, 0.25);
            box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8);
        }
        .matrix-tier-card {
            background: rgba(15, 27, 57, 0.6);
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px;
            margin-bottom: 14px;
            transition: all 0.25s ease;
        }
        .matrix-tier-card.highlighted-tier {
            border-color: var(--accent-cyan);
            background: linear-gradient(135deg, rgba(0, 102, 255, 0.22) 0%, rgba(0, 229, 255, 0.12) 100%);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
            position: relative;
        }
        .tier-badge {
            position: absolute;
            top: -10px;
            right: 18px;
            background: var(--accent-cyan);
            color: #070B14;
            font-size: 0.72rem;
            font-weight: 800;
            padding: 2px 10px;
            border-radius: 12px;
            text-transform: uppercase;
        }

        /* Metrics Board */
        .metric-card {
            padding: 30px 20px;
            text-align: center;
            border-radius: var(--card-radius);
            background: var(--glass-card-bg);
            border: 1px solid var(--glass-card-border);
        }
        .metric-value {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
            font-size: 2.7rem;
            font-weight: 800;
            color: #FFFFFF;
            text-shadow: 0 0 15px rgba(0, 229, 255, 0.55);
            line-height: 1.1;
            margin-bottom: 8px;
        }
        .metric-label {
            color: var(--accent-cyan);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .metric-sub {
            color: var(--text-muted);
            font-size: 0.82rem;
            margin: 0;
        }

        /* Service Matrix */
        .service-matrix-card {
            padding: 30px 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .service-icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 102, 255, 0.18);
            border: 1px solid rgba(0, 229, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.25rem;
            margin-bottom: 18px;
        }
        .indicator-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #10B981;
            box-shadow: 0 0 8px #10B981;
            display: inline-block;
            margin-right: 6px;
        }

        /* Benchmark Comparison Table / Cards */
        .benchmark-box {
            padding: 30px;
            border-radius: 16px;
        }
        .benchmark-col {
            padding: 24px;
            border-radius: 12px;
            height: 100%;
        }
        .benchmark-col-old {
            background: rgba(15, 23, 42, 0.45);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .benchmark-col-new {
            background: rgba(13, 33, 77, 0.6);
            border: 1px solid rgba(0, 229, 255, 0.35);
            box-shadow: inset 0 0 30px rgba(0, 102, 255, 0.15);
        }
        .compare-row {
            margin-bottom: 20px;
        }
        .progress-custom {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            overflow: hidden;
            margin-top: 6px;
        }
        .progress-bar-danger {
            background: #EF4444;
        }
        .progress-bar-neon {
            background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
            box-shadow: 0 0 10px var(--accent-cyan);
        }

        /* Timeline Milestone */
        .timeline-step {
            position: relative;
            padding-left: 36px;
            margin-bottom: 35px;
        }
        .timeline-step::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            bottom: -35px;
            width: 2px;
            background: rgba(0, 229, 255, 0.2);
        }
        .timeline-step:last-child::before {
            display: none;
        }
        .timeline-bullet {
            position: absolute;
            left: 0;
            top: 4px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: #070B14;
            border: 3px solid var(--accent-cyan);
            box-shadow: 0 0 10px var(--accent-cyan);
        }

        /* Content Article Feed */
        .feed-main-card {
            padding: 30px;
            height: 100%;
        }
        .feed-sub-card {
            padding: 20px;
            margin-bottom: 18px;
            border-radius: 12px;
            background: rgba(15, 25, 54, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.25s ease;
        }
        .feed-sub-card:hover {
            border-color: var(--accent-cyan);
            transform: translateX(4px);
        }

        /* Accordion Customization */
        .accordion-item {
            background: rgba(13, 27, 62, 0.55);
            border: 1px solid var(--glass-card-border);
            border-radius: 12px !important;
            margin-bottom: 14px;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: #FFFFFF;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 20px 24px;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            color: var(--accent-cyan);
            background: rgba(0, 102, 255, 0.12);
            border-bottom: 1px solid rgba(0, 229, 255, 0.2);
        }
        .accordion-button::after {
            filter: invert(1) brightness(2);
        }
        .accordion-body {
            color: #CBD5E1;
            padding: 22px 24px;
            line-height: 1.8;
            font-size: 0.95rem;
        }

        /* Form Customization */
        .form-control-tech {
            background: rgba(7, 13, 28, 0.75);
            border: 1px solid rgba(0, 229, 255, 0.25);
            color: #FFFFFF;
            padding: 14px 18px;
            border-radius: 10px;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }
        .form-control-tech:focus {
            background: rgba(11, 20, 42, 0.9);
            border-color: var(--accent-cyan);
            color: #FFFFFF;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
            outline: none;
        }
        .form-select-tech {
            background-color: rgba(7, 13, 28, 0.75);
            border: 1px solid rgba(0, 229, 255, 0.25);
            color: #FFFFFF;
            padding: 14px 18px;
            border-radius: 10px;
        }
        .form-select-tech:focus {
            background-color: rgba(11, 20, 42, 0.9);
            border-color: var(--accent-cyan);
            color: #FFFFFF;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
        }

        /* Footer */
        .site-footer {
            background: #04070D;
            border-top: 1px solid transparent;
            border-image: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.4), transparent) 1;
            padding: 70px 0 35px 0;
            position: relative;
            z-index: 1;
        }
        .footer-title {
            color: #FFFFFF;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 22px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 0.9rem;
        }
        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }

        /* Mobile Responsive Refinements */
        @media (max-width: 991.98px) {
            .hero-h1-title {
                font-size: 2.3rem;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .floating-navbar {
                border-radius: 20px;
                padding: 10px 16px;
            }
            .matrix-tier-card {
                margin-top: 20px;
            }
        }
        @media (max-width: 575.98px) {
            .hero-h1-title {
                font-size: 1.85rem;
            }
            .metric-value {
                font-size: 2.1rem;
            }
            .btn-glow-primary, .btn-glow-secondary {
                width: 100%;
                justify-content: center;
                margin-bottom: 10px;
            }
        }

/* roulang page: category1 */
:root {
      --bs-body-bg: #070B14;
      --bs-body-color: #E2E8F0;
      --primary-blue: #0066FF;
      --accent-cyan: #00E5FF;
      --tech-dark-bg: #070B14;
      --glass-card-bg: rgba(13, 27, 62, 0.55);
      --glass-card-border: rgba(0, 229, 255, 0.15);
      --glass-card-hover: rgba(0, 229, 255, 0.35);
      --text-title: #FFFFFF;
      --text-subtitle: #94A3B8;
      --text-muted: #64748B;
      --gradient-primary: linear-gradient(135deg, #0052D4 0%, #4364F7 50%, #6FB1FC 100%);
      --glow-shadow: 0 0 24px rgba(0, 102, 255, 0.45);
      --cyan-glow: 0 0 20px rgba(0, 229, 255, 0.5);
      --card-radius: 16px;
      --btn-radius: 10px;
    }
    body {
      background-color: var(--bs-body-bg);
      color: var(--bs-body-color);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      line-height: 1.68;
      overflow-x: hidden;
      position: relative;
    }
    body::before {
      content: '';
      position: absolute;
      top: -150px;
      left: 50%;
      transform: translateX(-50%);
      width: 1000px;
      height: 600px;
      background: radial-gradient(circle, rgba(0, 102, 255, 0.18) 0%, rgba(7, 11, 20, 0) 70%);
      pointer-events: none;
      z-index: 0;
    }
    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: all 0.3s ease;
    }
    a:hover {
      color: #FFFFFF;
      text-shadow: 0 0 8px var(--accent-cyan);
    }
    .site-header {
      position: sticky;
      top: 18px;
      z-index: 1050;
      padding: 0 16px;
    }
    .floating-navbar {
      max-width: 1200px;
      margin: 0 auto;
      background: rgba(7, 11, 20, 0.78);
      -webkit-backdrop-filter: blur(18px);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-card-border);
      border-radius: 40px;
      padding: 10px 24px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
      transition: border-color 0.3s ease;
    }
    .floating-navbar:hover {
      border-color: rgba(0, 229, 255, 0.35);
    }
    .navbar-brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF !important;
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .logo-icon-sparkle {
      width: 32px;
      height: 32px;
      background: var(--gradient-primary);
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      box-shadow: 0 0 12px var(--primary-blue);
      font-size: 0.95rem;
    }
    .nav-link-custom {
      color: #CBD5E1 !important;
      font-weight: 500;
      padding: 8px 18px !important;
      font-size: 0.95rem;
      border-radius: 20px;
      transition: all 0.25s ease;
    }
    .nav-link-custom:hover, .nav-link-custom.active {
      color: var(--accent-cyan) !important;
      background: rgba(0, 229, 255, 0.08);
    }
    .btn-nav-action {
      background: var(--gradient-primary);
      color: #FFFFFF !important;
      font-weight: 600;
      font-size: 0.9rem;
      border-radius: 30px;
      padding: 8px 22px;
      border: none;
      box-shadow: var(--glow-shadow);
      transition: all 0.3s ease;
    }
    .btn-nav-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 28px rgba(0, 229, 255, 0.7);
    }
    .glass-panel {
      background: var(--glass-card-bg);
      -webkit-backdrop-filter: blur(16px);
      backdrop-filter: blur(16px);
      border: 1px solid var(--glass-card-border);
      border-radius: var(--card-radius);
      box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      z-index: 1;
    }
    .glass-panel:hover {
      border-color: var(--glass-card-hover);
    }
    .section-block {
      padding: 60px 0;
      position: relative;
      z-index: 1;
    }
    .section-tag-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      background: rgba(0, 102, 255, 0.15);
      border: 1px solid rgba(0, 229, 255, 0.3);
      border-radius: 30px;
      color: var(--accent-cyan);
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-title {
      color: var(--text-title);
      font-weight: 800;
      font-size: 2.1rem;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-intro-text {
      color: var(--text-subtitle);
      font-size: 1.02rem;
      line-height: 1.75;
      max-width: 800px;
      margin: 0 auto 30px auto;
    }
    .btn-glow-primary {
      background: var(--gradient-primary);
      color: #FFFFFF;
      font-weight: 600;
      padding: 12px 30px;
      border-radius: var(--btn-radius);
      border: none;
      box-shadow: var(--glow-shadow);
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .btn-glow-primary:hover {
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.65);
    }
    .btn-glow-outline {
      background: rgba(13, 27, 62, 0.4);
      color: var(--accent-cyan);
      border: 1px solid rgba(0, 229, 255, 0.4);
      font-weight: 600;
      padding: 12px 36px;
      border-radius: 30px;
      transition: all 0.3s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-glow-outline:hover {
      color: #FFF;
      background: rgba(0, 102, 255, 0.25);
      border-color: var(--accent-cyan);
      box-shadow: var(--cyan-glow);
    }
    /* Section 1: Category Header */
    .category-header-wrap {
      padding: 40px 0 20px;
    }
    .breadcrumb-custom {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .breadcrumb-custom a {
      color: var(--text-subtitle);
    }
    .breadcrumb-custom a:hover {
      color: var(--accent-cyan);
    }
    .breadcrumb-custom .separator {
      color: var(--text-muted);
      font-size: 0.75rem;
    }
    .category-h1 {
      font-size: 2.3rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .category-stats-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 229, 255, 0.08);
      border: 1px solid rgba(0, 229, 255, 0.25);
      border-radius: 20px;
      padding: 4px 16px;
      font-size: 0.88rem;
      color: #A5F3FC;
    }
    /* Section 2: Filter Console */
    .filter-console-panel {
      padding: 24px;
      border-radius: 16px;
    }
    .filter-row {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      padding: 10px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
    }
    .filter-row:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .filter-label {
      width: 90px;
      font-weight: 600;
      color: var(--text-subtitle);
      font-size: 0.88rem;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .filter-item {
      padding: 5px 14px;
      font-size: 0.84rem;
      border-radius: 20px;
      color: #CBD5E1;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.2s ease;
      text-decoration: none;
    }
    .filter-item:hover {
      color: #FFFFFF;
      background: rgba(0, 229, 255, 0.1);
      border-color: rgba(0, 229, 255, 0.2);
    }
    .filter-item.active {
      background: rgba(0, 229, 255, 0.2);
      border-color: var(--accent-cyan);
      color: #FFFFFF;
      box-shadow: 0 0 12px rgba(0, 229, 255, 0.35);
      font-weight: 600;
    }
    /* Section 3: Video Cards */
    .video-grid-card {
      background: rgba(13, 27, 62, 0.65);
      border: 1px solid var(--glass-card-border);
      border-radius: 14px;
      overflow: hidden;
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .video-grid-card:hover {
      transform: translateY(-5px);
      border-color: var(--accent-cyan);
      box-shadow: 0 12px 30px rgba(0, 102, 255, 0.25);
    }
    .video-thumb-box {
      position: relative;
      width: 100%;
      padding-top: 56.25%; /* 16:9 */
      background: linear-gradient(135deg, #0d1e3d 0%, #081326 100%);
      overflow: hidden;
    }
    .video-thumb-overlay {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      background: radial-gradient(circle, rgba(0, 102, 255, 0.2) 0%, rgba(0, 0, 0, 0.6) 80%);
    }
    .play-trigger-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(0, 229, 255, 0.2);
      border: 1px solid var(--accent-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-size: 1.1rem;
      transition: all 0.3s ease;
      box-shadow: 0 0 15px rgba(0, 229, 255, 0.4);
    }
    .video-grid-card:hover .play-trigger-icon {
      transform: scale(1.15);
      background: var(--gradient-primary);
      box-shadow: 0 0 25px rgba(0, 229, 255, 0.8);
    }
    .badge-resolution {
      position: absolute;
      top: 10px;
      right: 10px;
      background: rgba(7, 11, 20, 0.85);
      border: 1px solid rgba(0, 229, 255, 0.4);
      color: #00E5FF;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 6px;
      box-shadow: 0 0 8px rgba(0, 229, 255, 0.3);
    }
    .badge-audio {
      position: absolute;
      top: 10px;
      left: 10px;
      background: rgba(0, 102, 255, 0.8);
      color: #FFFFFF;
      font-size: 0.7rem;
      font-weight: 600;
      padding: 2px 7px;
      border-radius: 4px;
    }
    .video-meta-bar {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 6px 12px;
      background: linear-gradient(180deg, transparent 0%, rgba(7, 11, 20, 0.95) 100%);
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: #94A3B8;
    }
    .video-info-body {
      padding: 16px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .video-card-title {
      font-size: 0.96rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 8px;
      line-height: 1.45;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .video-card-desc {
      font-size: 0.8rem;
      color: #94A3B8;
      line-height: 1.5;
      margin-bottom: 12px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      flex-grow: 1;
    }
    .video-card-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 10px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.78rem;
    }
    .heat-indicator {
      color: #FF7D00;
      display: flex;
      align-items: center;
      gap: 4px;
      font-weight: 600;
    }
    /* Section 4: Trending Metrics */
    .metric-rank-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.05);
      margin-bottom: 10px;
      transition: all 0.2s ease;
    }
    .metric-rank-item:hover {
      background: rgba(0, 102, 255, 0.1);
      border-color: rgba(0, 229, 255, 0.3);
    }
    .rank-num {
      width: 26px;
      height: 26px;
      border-radius: 6px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 700;
      margin-right: 12px;
    }
    .rank-num-1 {
      background: linear-gradient(135deg, #FFD700, #FFA500);
      color: #000;
      box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
    }
    .rank-num-2 {
      background: linear-gradient(135deg, #E0E0E0, #9E9E9E);
      color: #000;
    }
    .rank-num-3 {
      background: linear-gradient(135deg, #CD7F32, #8D5524);
      color: #FFF;
    }
    .rank-num-other {
      background: rgba(255, 255, 255, 0.1);
      color: #CBD5E1;
    }
    /* Section 5: Compatibility Badges */
    .compat-card {
      padding: 24px 20px;
      text-align: center;
      border-radius: 14px;
      background: rgba(13, 27, 62, 0.45);
      border: 1px solid var(--glass-card-border);
      transition: transform 0.3s ease;
    }
    .compat-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent-cyan);
    }
    .compat-icon-wrap {
      width: 54px;
      height: 54px;
      border-radius: 12px;
      background: rgba(0, 102, 255, 0.15);
      border: 1px solid rgba(0, 229, 255, 0.3);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--accent-cyan);
      margin-bottom: 14px;
    }
    .compat-check-tag {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #10B981;
      font-size: 0.78rem;
      font-weight: 600;
      background: rgba(16, 185, 129, 0.1);
      padding: 3px 10px;
      border-radius: 20px;
      margin-top: 10px;
    }
    /* Section 6: Spec Breakdown Table */
    .spec-table-wrap {
      overflow-x: auto;
    }
    .tech-spec-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      color: #CBD5E1;
      font-size: 0.9rem;
    }
    .tech-spec-table th {
      background: rgba(0, 102, 255, 0.15);
      color: var(--accent-cyan);
      padding: 14px 18px;
      font-weight: 700;
      border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    }
    .tech-spec-table td {
      padding: 14px 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      background: rgba(13, 27, 62, 0.3);
    }
    .tech-spec-table tr:hover td {
      background: rgba(0, 229, 255, 0.05);
    }
    /* Section 7: FAQ Accordion */
    .accordion-custom .accordion-item {
      background: rgba(13, 27, 62, 0.55);
      border: 1px solid var(--glass-card-border);
      border-radius: 12px !important;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-custom .accordion-button {
      background: transparent;
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1rem;
      box-shadow: none;
      padding: 18px 22px;
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      background: rgba(0, 102, 255, 0.12);
      color: var(--accent-cyan);
      border-bottom: 1px solid rgba(0, 229, 255, 0.2);
    }
    .accordion-custom .accordion-button::after {
      filter: invert(1) hue-rotate(180deg);
    }
    .accordion-custom .accordion-body {
      color: #94A3B8;
      font-size: 0.92rem;
      line-height: 1.7;
      padding: 20px 22px;
    }
    /* Footer */
    .site-footer {
      background: #04070D;
      border-top: 1px solid rgba(0, 229, 255, 0.18);
      padding: 70px 0 30px;
      position: relative;
      z-index: 1;
    }
    .footer-logo {
      font-size: 1.4rem;
      font-weight: 800;
      color: #FFFFFF;
      display: flex;
      align-items: center;
    }
    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 8px;
    }
    .footer-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 2px;
      background: var(--accent-cyan);
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-subtitle);
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
      padding-left: 4px;
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 25px;
      margin-top: 40px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }