/* roulang page: index */
:root {
            --color-deep-900: #06080d;
            --color-deep-800: #0a0e17;
            --color-deep-700: #0f1522;
            --color-deep-600: #141c2d;
            --color-neon: #00d4ff;
            --color-neon-400: #00d4ff;
            --color-neon-500: #00b8e0;
            --color-neon-300: #4de8ff;
            --color-gold: #f59e0b;
            --color-gold-400: #fbbf24;
            --color-gold-500: #f59e0b;
            --color-surface: rgba(20, 28, 45, 0.85);
            --color-surface-light: rgba(30, 40, 60, 0.7);
            --color-text: #f1f5f9;
            --color-text-weak: #94a3b8;
            --color-text-muted: #64748b;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-strong: rgba(255, 255, 255, 0.14);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
            --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.25);
            --shadow-neon-lg: 0 0 40px rgba(0, 212, 255, 0.35);
            --shadow-gold: 0 0 20px rgba(245, 158, 11, 0.3);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s ease;
            --font-display: "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "PingFang SC", "Microsoft YaHei", sans-serif;
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-deep-900);
            background-image:
                radial-gradient(ellipse at 50% 0%, rgba(0, 180, 220, 0.06) 0%, transparent 70%),
                radial-gradient(ellipse at 20% 80%, rgba(0, 160, 200, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 60%, rgba(0, 140, 180, 0.03) 0%, transparent 60%);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-neon);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== NAVIGATION ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(6, 8, 13, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition);
        }

        .site-header.scrolled {
            background: rgba(6, 8, 13, 0.95);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.5);
            border-bottom-color: var(--color-border-strong);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.35rem;
            color: #ffffff;
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: all var(--transition);
        }

        .logo-link:hover {
            color: var(--color-neon);
            text-shadow: 0 0 18px rgba(0, 212, 255, 0.5);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-neon-500), #0284c7);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 14px rgba(0, 180, 220, 0.4);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-links a.active {
            color: var(--color-neon);
            background: rgba(0, 212, 255, 0.08);
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-neon);
            box-shadow: 0 0 8px var(--color-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            background: linear-gradient(135deg, var(--color-gold-400), var(--color-gold-600));
            color: #1a1a1a;
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            transition: all var(--transition);
            letter-spacing: 0.01em;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.5);
            color: #0a0a0a;
            background: linear-gradient(135deg, #fcd34d, var(--color-gold-500));
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 8px;
            border-radius: 8px;
            transition: all var(--transition);
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-neon);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(6, 8, 13, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            padding: 24px 20px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 18px;
            border-radius: var(--radius);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--color-text-weak);
            transition: all var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-menu a.active {
            color: var(--color-neon);
            background: rgba(0, 212, 255, 0.08);
        }

        .mobile-menu .mobile-cta {
            margin-top: 12px;
            display: block;
            text-align: center;
            padding: 14px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--color-gold-400), var(--color-gold-600));
            color: #1a1a1a;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .header-inner {
                height: 56px;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu-toggle {
                display: none;
            }
            .mobile-menu {
                display: none !important;
            }
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--color-deep-800);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            z-index: 0;
            opacity: 0.5;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6, 8, 13, 0.7) 0%, rgba(10, 14, 23, 0.85) 50%, rgba(6, 8, 13, 0.95) 100%);
            z-index: 1;
        }

        .hero-glow {
            position: absolute;
            top: 30%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(0, 180, 220, 0.2) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            text-align: center;
            max-width: 780px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: var(--color-neon);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }

        .hero-badge .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-neon);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 4px var(--color-neon), 0 0 8px var(--color-neon);
            }
            50% {
                box-shadow: 0 0 12px var(--color-neon), 0 0 24px var(--color-neon);
            }
        }

        .hero-title {
            font-family: var(--font-display);
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            color: #ffffff;
            margin: 0 0 16px;
            letter-spacing: 0.03em;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--color-neon-300), var(--color-neon-500));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: none;
            position: relative;
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--color-text-weak);
            margin: 0 0 32px;
            line-height: 1.7;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--color-gold-400), var(--color-gold-600));
            color: #1a1a1a;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
            transition: all var(--transition);
            letter-spacing: 0.02em;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.55);
            background: linear-gradient(135deg, #fcd34d, var(--color-gold-500));
        }

        .btn-primary:active {
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: all var(--transition);
            letter-spacing: 0.02em;
        }

        .btn-outline:hover {
            border-color: var(--color-neon);
            color: var(--color-neon);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
            background: rgba(0, 212, 255, 0.05);
        }

        @media (max-width: 768px) {
            .hero-section {
                min-height: 480px;
            }
            .hero-content {
                padding: 50px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 72px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-neon);
            margin-bottom: 8px;
        }

        .section-title {
            font-family: var(--font-display);
            font-size: 2.2rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 12px;
            letter-spacing: 0.02em;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--color-text-weak);
            max-width: 560px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ========== STATS PANEL (HUD) ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .stat-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--color-neon), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .stat-card:hover {
            border-color: var(--color-border-strong);
            transform: translateY(-4px);
            box-shadow: var(--shadow-neon);
        }

        .stat-card:hover::before {
            opacity: 1;
        }

        .stat-value {
            font-family: var(--font-display);
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.02em;
        }

        .stat-value .neon-accent {
            color: var(--color-neon);
            text-shadow: 0 0 14px rgba(0, 212, 255, 0.5);
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin-top: 6px;
            letter-spacing: 0.04em;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-value {
                font-size: 2rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 20px 14px;
            }
            .stat-value {
                font-size: 1.6rem;
            }
        }

        /* ========== CATEGORY CARDS ========== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 20px;
            max-width: 700px;
            margin: 0 auto;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            display: flex;
            flex-direction: row;
            min-height: 200px;
        }

        .category-card:hover {
            border-color: var(--color-neon-500);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
        }

        .category-card-img {
            width: 280px;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }

        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .category-card:hover .category-card-img img {
            transform: scale(1.06);
        }

        .category-card-body {
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .category-card-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            background: rgba(0, 212, 255, 0.12);
            color: var(--color-neon);
            margin-bottom: 12px;
            width: fit-content;
        }

        .category-card-title {
            font-family: var(--font-display);
            font-size: 1.4rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 8px;
        }

        .category-card-desc {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin: 0 0 16px;
            line-height: 1.6;
        }

        .category-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-neon);
            transition: all var(--transition);
        }

        .category-card-link:hover {
            gap: 10px;
            color: var(--color-neon-300);
        }

        .category-card-link i {
            transition: transform var(--transition);
        }

        .category-card-link:hover i {
            transform: translateX(3px);
        }

        @media (max-width: 768px) {
            .category-card {
                flex-direction: column;
            }
            .category-card-img {
                width: 100%;
                height: 180px;
            }
            .category-card-body {
                padding: 20px;
            }
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 14px;
            max-width: 800px;
            margin: 0 auto;
        }

        .news-item {
            display: flex;
            gap: 18px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: all var(--transition);
            align-items: center;
        }

        .news-item:hover {
            border-color: var(--color-border-strong);
            box-shadow: var(--shadow);
            transform: translateX(3px);
        }

        .news-thumb {
            width: 100px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-deep-700);
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-info {
            flex: 1;
            min-width: 0;
        }

        .news-title {
            font-weight: 600;
            font-size: 1rem;
            color: #ffffff;
            margin: 0 0 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }

        .news-item:hover .news-title {
            color: var(--color-neon);
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .news-meta .tag {
            padding: 2px 10px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.1);
            color: var(--color-neon);
            font-size: 0.75rem;
            font-weight: 500;
        }

        .news-empty {
            text-align: center;
            padding: 40px;
            color: var(--color-text-weak);
            font-size: 0.95rem;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
        }

        @media (max-width: 520px) {
            .news-item {
                flex-direction: column;
                gap: 12px;
            }
            .news-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* ========== FEATURE CARDS ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }

        .feature-card:hover {
            border-color: var(--color-border-strong);
            box-shadow: var(--shadow-lg);
            transform: translateY(-5px);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 160, 200, 0.1));
            color: var(--color-neon);
            font-size: 1.5rem;
            margin-bottom: 16px;
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon {
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-family: var(--font-display);
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 8px;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .feature-card {
                padding: 24px 16px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== PROCESS / PATH ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }

        .process-step {
            text-align: center;
            position: relative;
            padding: 24px 16px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            transition: all var(--transition);
        }

        .process-step:hover {
            border-color: var(--color-neon-500);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1.2rem;
            background: linear-gradient(135deg, var(--color-neon-500), #0284c7);
            color: #fff;
            margin-bottom: 12px;
            box-shadow: 0 0 14px rgba(0, 180, 220, 0.4);
        }

        .process-step h4 {
            font-weight: 600;
            color: #fff;
            margin: 0 0 6px;
            font-size: 1rem;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            margin: 0;
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--color-border-strong);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: #ffffff;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            text-align: left;
            gap: 12px;
            transition: all var(--transition);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: all var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 212, 255, 0.15);
            color: var(--color-neon);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
            color: var(--color-text-weak);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--color-deep-700);
            position: relative;
            overflow: hidden;
        }

        .cta-glow {
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(0, 200, 240, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            text-align: center;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-family: var(--font-display);
            font-size: 2rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 12px;
        }

        .cta-content p {
            color: var(--color-text-weak);
            margin: 0 0 28px;
            font-size: 1rem;
        }

        @media (max-width: 768px) {
            .cta-content h2 {
                font-size: 1.5rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-deep-900);
            border-top: 1px solid var(--color-border);
            padding: 40px 0 28px;
        }

        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-brand {
            font-family: var(--font-display);
            font-weight: 700;
            font-size: 1.1rem;
            color: #ffffff;
            letter-spacing: 0.02em;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--color-text-weak);
        }

        .footer-links a:hover {
            color: var(--color-neon);
        }

        .footer-copy {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            width: 100%;
            text-align: center;
            margin-top: 16px;
        }

        @media (max-width: 520px) {
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
        }

        /* ========== UTILITY ========== */
        .bg-deep-800 {
            background: var(--color-deep-800);
        }
        .bg-deep-900 {
            background: var(--color-deep-900);
        }
        .bg-surface {
            background: var(--color-surface);
        }
        .divider {
            height: 1px;
            background: var(--color-border);
            border: none;
            margin: 0;
        }

/* roulang page: article */
:root {
            --primary: #00c6ff;
            --primary-glow: rgba(0, 198, 255, 0.35);
            --primary-dark: #0098cc;
            --accent: #ffb800;
            --accent-glow: rgba(255, 184, 0, 0.4);
            --highlight: #00ff88;
            --highlight-glow: rgba(0, 255, 136, 0.3);
            --danger: #ff4757;
            --bg-deep: #080c14;
            --bg-body: #0d1117;
            --bg-surface: #141a24;
            --bg-card: #181e2a;
            --bg-card-hover: #1c2332;
            --bg-overlay: rgba(8, 12, 20, 0.85);
            --text-primary: #e8ecf1;
            --text-secondary: #b0b8c4;
            --text-weak: #6b7380;
            --text-muted: #4a525e;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-strong: rgba(255, 255, 255, 0.12);
            --border-glow: rgba(0, 198, 255, 0.25);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.45);
            --shadow-lg: 0 8px 36px rgba(0, 0, 0, 0.55);
            --shadow-glow: 0 0 28px rgba(0, 198, 255, 0.18);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Menlo', monospace;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s ease;
            --container-max: 1160px;
            --content-max: 820px;
            --nav-height: 64px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-deep);
            min-height: 100vh;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 198, 255, 0.03) 0%, transparent 55%),
                radial-gradient(ellipse at 70% 60%, rgba(255, 184, 0, 0.02) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 80%, rgba(0, 255, 136, 0.015) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .content-container {
            max-width: var(--content-max);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ========== 阅读进度条 ========== */
        .reading-progress-bar {
            position: fixed;
            top: 0;
            left: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--highlight), var(--accent));
            z-index: 10001;
            transition: width 0.08s linear;
            border-radius: 0 2px 2px 0;
            box-shadow: 0 0 14px var(--primary-glow);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 9999;
            background: rgba(13, 17, 23, 0.82);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            border-bottom: 1px solid var(--border-subtle);
            box-shadow: 0 1px 20px rgba(0, 0, 0, 0.35);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            gap: 20px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--primary);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 0 18px var(--primary-glow);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(0, 198, 255, 0.08);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--primary-glow);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            font-size: 0.9rem;
            font-weight: 600;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            letter-spacing: 0.02em;
            transition: all var(--transition-normal);
            box-shadow: 0 4px 16px var(--primary-glow);
            flex-shrink: 0;
        }
        .nav-cta:hover {
            color: #fff;
            box-shadow: 0 6px 24px rgba(0, 198, 255, 0.5);
            transform: translateY(-2px);
        }

        .mobile-menu-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px;
            background: rgba(20, 26, 36, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-strong);
            position: absolute;
            top: var(--nav-height);
            left: 0;
            right: 0;
            z-index: 9998;
            box-shadow: var(--shadow-lg);
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            padding: 12px 16px;
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            display: block;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(0, 198, 255, 0.07);
        }
        .mobile-menu a.mobile-cta {
            margin-top: 8px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            font-weight: 600;
            text-align: center;
            box-shadow: 0 4px 16px var(--primary-glow);
        }
        .mobile-menu a.mobile-cta:hover {
            color: #fff;
            box-shadow: 0 6px 22px rgba(0, 198, 255, 0.5);
        }

        /* ========== Article Banner ========== */
        .article-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            background: var(--bg-body) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, var(--bg-deep) 0%, rgba(8, 12, 20, 0.75) 35%, rgba(8, 12, 20, 0.45) 70%, rgba(8, 12, 20, 0.3) 100%);
            z-index: 1;
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 70%, rgba(0, 198, 255, 0.08) 0%, transparent 60%);
            z-index: 1;
        }
        .article-banner-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 48px 0 40px;
        }
        .article-banner-content .container {
            max-width: var(--content-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .banner-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            background: rgba(0, 198, 255, 0.13);
            color: var(--primary);
            border: 1px solid var(--border-glow);
            margin-bottom: 16px;
            box-shadow: 0 0 14px rgba(0, 198, 255, 0.12);
        }
        .banner-category-tag i {
            font-size: 0.7rem;
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            letter-spacing: 0.02em;
            margin-bottom: 14px;
            text-shadow: 0 2px 16px rgba(0, 0, 0, 0.5);
        }
        .banner-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }
        .banner-meta-row span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .banner-meta-row i {
            color: var(--primary);
            font-size: 0.8rem;
        }

        /* ========== HUD 信息面板 ========== */
        .hud-panel-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: -28px;
            position: relative;
            z-index: 3;
        }
        .hud-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px 18px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
        }
        .hud-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }
        .hud-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .hud-card-icon.blue {
            background: rgba(0, 198, 255, 0.12);
            color: var(--primary);
            box-shadow: 0 0 14px rgba(0, 198, 255, 0.2);
        }
        .hud-card-icon.gold {
            background: rgba(255, 184, 0, 0.12);
            color: var(--accent);
            box-shadow: 0 0 14px rgba(255, 184, 0, 0.2);
        }
        .hud-card-icon.green {
            background: rgba(0, 255, 136, 0.12);
            color: var(--highlight);
            box-shadow: 0 0 14px rgba(0, 255, 136, 0.2);
        }
        .hud-card-info {
            display: flex;
            flex-direction: column;
            gap: 3px;
        }
        .hud-card-label {
            font-size: 0.75rem;
            color: var(--text-weak);
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .hud-card-value {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            font-family: var(--font-mono);
        }

        /* ========== Main Content Area ========== */
        .article-main {
            padding: 48px 0 56px;
            position: relative;
            z-index: 1;
        }
        .article-body-wrapper {
            max-width: var(--content-max);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1fr 280px;
            gap: 40px;
            align-items: start;
        }

        .article-content-area {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            box-shadow: var(--shadow-md);
            line-height: 1.85;
            font-size: 1.05rem;
            color: var(--text-primary);
        }
        .article-content-area h2 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 14px;
            color: #fff;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--border-glow);
        }
        .article-content-area h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .article-content-area p {
            margin-bottom: 16px;
            color: var(--text-secondary);
        }
        .article-content-area strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-content-area ul,
        .article-content-area ol {
            margin: 12px 0 20px 20px;
            color: var(--text-secondary);
        }
        .article-content-area ul li,
        .article-content-area ol li {
            margin-bottom: 8px;
            position: relative;
            padding-left: 6px;
        }
        .article-content-area ul {
            list-style: disc;
        }
        .article-content-area ol {
            list-style: decimal;
        }
        .article-content-area blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 20px 0;
            background: rgba(0, 198, 255, 0.04);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content-area img {
            border-radius: var(--radius-lg);
            margin: 20px 0;
            box-shadow: var(--shadow-md);
        }
        .article-content-area a {
            color: var(--primary);
            border-bottom: 1px dotted var(--border-glow);
        }
        .article-content-area a:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        /* ========== Sidebar ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: sticky;
            top: calc(var(--nav-height) + 28px);
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-subtle);
            letter-spacing: 0.03em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h4 i {
            color: var(--primary);
            font-size: 0.85rem;
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 0.88rem;
        }
        .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: 6px;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
        }
        .sidebar-card ul li a::before {
            content: '▸';
            font-size: 0.65rem;
            color: var(--primary);
            flex-shrink: 0;
        }

        .share-buttons {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .share-btn {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: #fff;
            transition: all var(--transition-fast);
        }
        .share-btn.twitter {
            background: #1da1f2;
        }
        .share-btn.facebook {
            background: #1877f2;
        }
        .share-btn.weibo {
            background: #e6162d;
        }
        .share-btn.copy {
            background: var(--bg-surface);
            color: var(--text-secondary);
            border: 1px solid var(--border-strong);
        }
        .share-btn:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        /* ========== Related Posts ========== */
        .related-section {
            padding: 52px 0 60px;
            position: relative;
            z-index: 1;
            background: var(--bg-body);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 32px;
            letter-spacing: 0.02em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .related-card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        .related-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(8, 12, 20, 0.5) 0%, transparent 50%);
        }
        .related-card-body {
            padding: 18px;
        }
        .related-card-body .tag-sm {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 14px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(0, 198, 255, 0.1);
            color: var(--primary);
            margin-bottom: 8px;
            letter-spacing: 0.03em;
        }
        .related-card-body h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 6px;
        }
        .related-card-body h5 a {
            color: inherit;
        }
        .related-card-body h5 a:hover {
            color: var(--primary);
        }
        .related-card-body .time-sm {
            font-size: 0.78rem;
            color: var(--text-weak);
        }

        /* ========== CTA Section ========== */
        .cta-section {
            padding: 56px 0 60px;
            position: relative;
            z-index: 1;
            background: var(--bg-deep);
            text-align: center;
        }
        .cta-inner {
            background: var(--bg-card);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(0, 198, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-inner h3 {
            font-size: 1.7rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            position: relative;
            z-index: 1;
        }
        .cta-inner p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
            position: relative;
            z-index: 1;
        }
        .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            color: #fff;
            letter-spacing: 0.03em;
            box-shadow: 0 6px 24px var(--primary-glow);
            transition: all var(--transition-normal);
            position: relative;
            z-index: 1;
        }
        .btn-cta-lg:hover {
            color: #fff;
            box-shadow: 0 10px 36px rgba(0, 198, 255, 0.5);
            transform: translateY(-3px);
        }

        /* ========== Not Found State ========== */
        .not-found-state {
            text-align: center;
            padding: 80px 24px;
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .not-found-state .nf-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-state h2 {
            font-size: 1.6rem;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .not-found-state p {
            color: var(--text-weak);
            margin-bottom: 24px;
        }
        .not-found-state .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            background: var(--bg-card);
            color: var(--primary);
            border: 1px solid var(--border-glow);
            transition: all var(--transition-fast);
        }
        .not-found-state .btn-back:hover {
            background: rgba(0, 198, 255, 0.08);
            box-shadow: var(--shadow-glow);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            padding: 36px 0;
            position: relative;
            z-index: 1;
        }
        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 16px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
            letter-spacing: 0.03em;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 0.88rem;
            color: var(--text-weak);
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-copy {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .article-body-wrapper {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .sidebar-card {
                flex: 1 1 240px;
                min-width: 200px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hud-panel-row {
                grid-template-columns: repeat(2, 1fr);
                margin-top: -20px;
            }
            .article-banner h1 {
                font-size: 2rem;
            }
            .desktop-only {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .nav-links {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .article-banner {
                min-height: 260px;
            }
            .article-banner h1 {
                font-size: 1.55rem;
            }
            .article-banner-content {
                padding: 36px 0 28px;
            }
            .banner-meta-row {
                gap: 10px;
                font-size: 0.8rem;
            }
            .article-content-area {
                padding: 24px 18px;
                font-size: 0.98rem;
                border-radius: var(--radius-lg);
            }
            .hud-panel-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
                margin-top: -16px;
            }
            .hud-card {
                padding: 14px 12px;
                gap: 10px;
            }
            .hud-card-icon {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }
            .hud-card-value {
                font-size: 0.9rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card-img {
                height: 160px;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cta-inner {
                padding: 32px 20px;
            }
            .cta-inner h3 {
                font-size: 1.3rem;
            }
            .footer-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .article-sidebar {
                flex-direction: column;
            }
        }

        @media (max-width: 520px) {
            .article-banner {
                min-height: 220px;
            }
            .article-banner h1 {
                font-size: 1.3rem;
            }
            .banner-category-tag {
                font-size: 0.72rem;
                padding: 4px 10px;
            }
            .banner-meta-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .article-content-area {
                padding: 18px 14px;
                font-size: 0.92rem;
                border-radius: var(--radius-md);
            }
            .article-content-area h2 {
                font-size: 1.25rem;
            }
            .hud-panel-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
                margin-top: -10px;
            }
            .hud-card {
                padding: 10px 10px;
                gap: 8px;
                border-radius: var(--radius-md);
            }
            .hud-card-icon {
                width: 32px;
                height: 32px;
                font-size: 0.8rem;
                border-radius: var(--radius-sm);
            }
            .hud-card-label {
                font-size: 0.68rem;
            }
            .hud-card-value {
                font-size: 0.8rem;
            }
            .btn-cta-lg {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .container {
                padding: 0 14px;
            }
            .content-container {
                padding: 0 14px;
            }
            .header-inner {
                padding: 0 14px;
            }
            .logo-link {
                font-size: 1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
            .site-header {
                --nav-height: 54px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #060b14;
            --bg-surface: #0d1421;
            --bg-card: #111827;
            --bg-card-hover: #161e30;
            --bg-panel: #0f1724;
            --border-subtle: rgba(255, 255, 255, 0.06);
            --border-glow: rgba(0, 180, 255, 0.25);
            --border-neon: rgba(0, 200, 255, 0.5);
            --text-primary: #e8edf4;
            --text-secondary: #b0bcc9;
            --text-weak: #6b7385;
            --accent-cyan: #00c8ff;
            --accent-blue: #1a8cff;
            --accent-orange: #ff6b35;
            --accent-gold: #f0a830;
            --accent-green: #2ecc71;
            --accent-red: #e74c3c;
            --gradient-hero: linear-gradient(180deg, rgba(6, 11, 20, 0.4) 0%, rgba(6, 11, 20, 0.92) 70%, #060b14 100%);
            --gradient-card-border: linear-gradient(135deg, rgba(0, 200, 255, 0.3), rgba(0, 200, 255, 0.05));
            --gradient-btn: linear-gradient(135deg, #00c8ff, #1a8cff);
            --gradient-btn-hover: linear-gradient(135deg, #1ad4ff, #2a9cff);
            --gradient-tag: linear-gradient(135deg, rgba(0, 200, 255, 0.15), rgba(26, 140, 255, 0.08));
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5), 0 1px 0 rgba(255, 255, 255, 0.03) inset;
            --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 200, 255, 0.2), 0 2px 0 rgba(255, 255, 255, 0.04) inset;
            --shadow-glow: 0 0 30px rgba(0, 200, 255, 0.15), 0 0 60px rgba(0, 200, 255, 0.05);
            --shadow-btn: 0 4px 20px rgba(0, 180, 255, 0.3);
            --shadow-btn-hover: 0 6px 30px rgba(0, 200, 255, 0.45);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
            --max-width: 1240px;
            --header-height: 70px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            font-size: 16px;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        input {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== HEADER ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(13, 20, 33, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-subtle);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .site-header.scrolled {
            background: rgba(10, 16, 26, 0.95);
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
            border-bottom-color: rgba(0, 180, 255, 0.15);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            opacity: 0.85;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--gradient-btn);
            color: #fff;
            font-size: 1rem;
            box-shadow: var(--shadow-btn);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links a {
            display: block;
            padding: 8px 18px;
            border-radius: 25px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-links a.active {
            color: #fff;
            background: rgba(0, 200, 255, 0.12);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 24px;
            border-radius: 25px;
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--gradient-btn);
            color: #fff;
            white-space: nowrap;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition-smooth);
            letter-spacing: 0.3px;
        }

        .nav-cta:hover {
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
            color: #fff;
        }

        .mobile-menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--border-glow);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 16, 26, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 32px 24px;
            gap: 6px;
            z-index: 999;
            border-top: 1px solid var(--border-subtle);
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 20px;
            border-radius: var(--radius-md);
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #fff;
            background: rgba(0, 200, 255, 0.1);
        }

        .mobile-menu .mobile-cta {
            margin-top: 12px;
            background: var(--gradient-btn);
            color: #fff;
            text-align: center;
            font-weight: 600;
            box-shadow: var(--shadow-btn);
        }

        .mobile-menu .mobile-cta:hover {
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            margin-top: var(--header-height);
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--gradient-hero);
            z-index: 1;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-neon), transparent);
            z-index: 2;
            opacity: 0.6;
        }

        .banner-content {
            position: relative;
            z-index: 3;
            padding: 60px 0 50px;
            width: 100%;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 25px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 200, 255, 0.08);
            border: 1px solid rgba(0, 200, 255, 0.2);
            margin-bottom: 20px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .banner-badge i {
            font-size: 0.75rem;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(1.5);
            }
        }

        .banner-title {
            font-size: clamp(2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .banner-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), #60dfff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .banner-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .banner-stats-row {
            display: flex;
            gap: 40px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .banner-stat {
            display: flex;
            align-items: baseline;
            gap: 8px;
        }

        .banner-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            font-family: var(--font-mono);
            letter-spacing: -1px;
        }

        .banner-stat-label {
            font-size: 0.85rem;
            color: var(--text-weak);
            font-weight: 500;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 70px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--accent-cyan);
            margin-bottom: 10px;
        }

        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-weak);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ========== ARTICLES GRID ========== */
        .articles-section {
            background: var(--bg-deep);
            padding: 60px 0 80px;
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
            gap: 24px;
        }

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

        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: rgba(0, 200, 255, 0.2);
            background: var(--bg-card-hover);
        }

        .article-card-thumb {
            position: relative;
            width: 100%;
            height: 220px;
            overflow: hidden;
            background: var(--bg-surface);
            flex-shrink: 0;
        }

        .article-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .article-card:hover .article-card-thumb img {
            transform: scale(1.06);
        }

        .article-card-thumb .thumb-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(6, 11, 20, 0.7) 100%);
            z-index: 1;
        }

        .article-card-tag-row {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .article-card-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(0, 0, 0, 0.6);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 200, 255, 0.3);
            backdrop-filter: blur(6px);
            letter-spacing: 0.5px;
        }

        .article-card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-body.no-thumb {
            padding-top: 24px;
        }

        .article-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

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

        .article-card-summary {
            font-size: 0.9rem;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-weak);
            padding-top: 12px;
            border-top: 1px solid var(--border-subtle);
        }

        .article-card-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .article-card-meta i {
            font-size: 0.75rem;
            opacity: 0.7;
        }

        .article-card-no-thumb {
            border-left: 3px solid var(--accent-cyan);
        }

        /* ========== PAGINATION ========== */
        .pagination-row {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 48px;
            flex-wrap: wrap;
        }

        .pagination-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .pagination-btn:hover {
            color: #fff;
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
        }

        .pagination-btn.active {
            background: var(--gradient-btn);
            color: #fff;
            border-color: transparent;
            font-weight: 700;
            box-shadow: var(--shadow-btn);
        }

        .pagination-btn.disabled {
            opacity: 0.35;
            pointer-events: none;
            cursor: default;
        }

        /* ========== HUD STATS PANEL ========== */
        .stats-panel-section {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            padding: 50px 0;
        }

        .stats-hud-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-hud-card {
            background: var(--bg-panel);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-subtle);
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .stat-hud-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 0 0 4px 4px;
            opacity: 0.6;
        }

        .stat-hud-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }

        .stat-hud-icon {
            font-size: 1.6rem;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            opacity: 0.9;
        }

        .stat-hud-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            font-family: var(--font-mono);
            letter-spacing: -1px;
            line-height: 1;
            margin-bottom: 6px;
        }

        .stat-hud-label {
            font-size: 0.85rem;
            color: var(--text-weak);
            font-weight: 500;
            letter-spacing: 0.5px;
        }

        /* ========== TAGS CLOUD ========== */
        .tags-section {
            background: var(--bg-deep);
            padding: 50px 0 30px;
        }

        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: 25px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .tag-chip:hover {
            color: #fff;
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.08);
        }

        .tag-chip.active-tag {
            background: var(--gradient-tag);
            border-color: var(--border-neon);
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .tag-chip .tag-count {
            font-size: 0.72rem;
            color: var(--text-weak);
            background: rgba(255, 255, 255, 0.05);
            padding: 2px 8px;
            border-radius: 12px;
        }

        /* ========== COMPARISON PANEL ========== */
        .comparison-section {
            background: var(--bg-surface);
            padding: 70px 0;
            border-top: 1px solid var(--border-subtle);
        }

        .comparison-panel {
            display: grid;
            grid-template-columns: 1fr 60px 1fr;
            gap: 0;
            align-items: stretch;
            background: var(--bg-panel);
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
        }

        .comparison-side {
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
        }

        .comparison-side.left-side {
            border-right: 1px solid var(--border-subtle);
        }

        .comparison-side.right-side {
            border-left: 1px solid var(--border-subtle);
        }

        .comparison-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-deep);
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--accent-orange);
            letter-spacing: 1px;
            writing-mode: vertical-lr;
            text-orientation: mixed;
            border-left: 1px solid var(--border-subtle);
            border-right: 1px solid var(--border-subtle);
        }

        .comparison-team {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .comparison-team .team-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .team-dot.blue {
            background: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 200, 255, 0.6);
        }

        .team-dot.orange {
            background: var(--accent-orange);
            box-shadow: 0 0 12px rgba(255, 107, 53, 0.6);
        }

        .comparison-stats {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .comparison-stat-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-subtle);
        }

        .comparison-stat-row:last-child {
            border-bottom: none;
        }

        .comparison-stat-label {
            font-size: 0.85rem;
            color: var(--text-weak);
        }

        .comparison-stat-value {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-mono);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-deep);
            padding: 70px 0;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item:hover {
            border-color: var(--border-glow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            text-align: left;
            cursor: pointer;
            transition: color var(--transition-fast);
            gap: 12px;
        }

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

        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-weak);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--bg-surface);
            padding: 70px 0;
            border-top: 1px solid var(--border-subtle);
            text-align: center;
        }

        .cta-card {
            background: var(--bg-panel);
            border-radius: var(--radius-xl);
            padding: 50px 40px;
            border: 1px solid var(--border-subtle);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(0, 200, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-card h3 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
            line-height: 1.7;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            background: var(--gradient-btn);
            color: #fff;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
            letter-spacing: 0.3px;
        }

        .cta-btn:hover {
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-3px);
            color: #fff;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-subtle);
            padding: 40px 0;
            text-align: center;
        }

        .footer-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 16px;
        }

        .footer-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-links a {
            font-size: 0.9rem;
            color: var(--text-weak);
            transition: color var(--transition-fast);
        }

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

        .footer-copy {
            font-size: 0.8rem;
            color: var(--text-weak);
            opacity: 0.7;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .stats-hud-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .articles-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }

            .comparison-panel {
                grid-template-columns: 1fr;
            }

            .comparison-divider {
                writing-mode: horizontal-tb;
                padding: 10px 0;
                font-size: 0.9rem;
                border-left: none;
                border-right: none;
                border-top: 1px solid var(--border-subtle);
                border-bottom: 1px solid var(--border-subtle);
            }

            .comparison-side.left-side {
                border-right: none;
                border-bottom: 1px solid var(--border-subtle);
            }

            .comparison-side.right-side {
                border-left: none;
                border-top: 1px solid var(--border-subtle);
            }
        }

        @media (max-width: 768px) {
            .desktop-only {
                display: none !important;
            }

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

            .nav-links {
                display: none;
            }

            .nav-cta.desktop-only {
                display: none;
            }

            .page-banner {
                min-height: 300px;
            }

            .banner-content {
                padding: 40px 0 36px;
            }

            .banner-stats-row {
                gap: 24px;
            }

            .banner-stat-num {
                font-size: 1.5rem;
            }

            .articles-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .article-card-thumb {
                height: 180px;
            }

            .stats-hud-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stat-hud-card {
                padding: 20px 16px;
            }

            .stat-hud-value {
                font-size: 1.8rem;
            }

            .cta-card {
                padding: 36px 24px;
            }

            .cta-card h3 {
                font-size: 1.4rem;
            }

            .section {
                padding: 48px 0;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .comparison-side {
                padding: 24px 20px;
            }

            .tags-cloud {
                gap: 8px;
            }

            .tag-chip {
                padding: 7px 14px;
                font-size: 0.82rem;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 0.93rem;
            }

            .faq-answer-inner {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .banner-title {
                font-size: 1.6rem;
            }

            .banner-desc {
                font-size: 0.92rem;
            }

            .banner-stats-row {
                gap: 16px;
                flex-direction: column;
            }

            .stats-hud-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .stat-hud-value {
                font-size: 1.5rem;
            }

            .stat-hud-label {
                font-size: 0.75rem;
            }

            .article-card-body {
                padding: 16px;
            }

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

            .pagination-btn {
                min-width: 34px;
                height: 34px;
                font-size: 0.8rem;
                padding: 0 10px;
            }

            .cta-btn {
                padding: 12px 28px;
                font-size: 0.9rem;
            }

            .comparison-team {
                font-size: 1.15rem;
            }
        }