/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #0099cc;
            --primary-glow: rgba(0, 212, 255, 0.35);
            --secondary: #7b2ff7;
            --secondary-glow: rgba(123, 47, 247, 0.35);
            --accent: #ff6b35;
            --bg-dark: #0a0e1a;
            --bg-dark-alt: #080c16;
            --bg-card: #111827;
            --bg-card-hover: #1a2438;
            --bg-section: #0f1729;
            --bg-section-alt: #0c1424;
            --text-light: #f1f5f9;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-color: #1e293b;
            --border-glow: rgba(0, 212, 255, 0.15);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
            --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1280px;
            --navbar-height: 72px;
        }

        /* ===== Base Reset ===== */
        *,
        *::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-dark);
            color: var(--text-light);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #66e3ff;
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== Utility Classes ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding: 100px 0;
        }
        .section-padding-sm {
            padding: 60px 0;
        }

        .section-title {
            font-size: 2.4rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-light);
        }
        .section-title .highlight {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px;
            text-align: center;
            line-height: 1.7;
        }

        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .glow-line {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 0 auto 24px;
            box-shadow: 0 0 20px var(--primary-glow);
        }

        /* ===== Navbar ===== */
        .navbar {
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            padding: 0;
            min-height: var(--navbar-height);
            transition: var(--transition);
            position: sticky;
            top: 0;
            z-index: 1050;
        }
        .navbar.scrolled {
            background: rgba(10, 14, 26, 0.98);
            border-bottom-color: rgba(0, 212, 255, 0.15);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--navbar-height);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-light);
            padding: 0;
            text-decoration: none;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .navbar-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            font-weight: 700;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .navbar-brand .brand-text {
            background: linear-gradient(135deg, var(--text-light), #cbd5e1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .navbar-nav .nav-item {
            position: relative;
        }
        .navbar-nav .nav-link {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.01em;
        }
        .navbar-nav .nav-link:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.04);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
            box-shadow: inset 0 -2px 0 var(--primary);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--primary-glow);
        }
        .navbar-nav .nav-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .navbar .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff !important;
            padding: 8px 24px !important;
            border-radius: 50px !important;
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
            margin-left: 8px;
        }
        .navbar .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 28px rgba(0, 212, 255, 0.4);
        }
        .navbar .nav-cta.active {
            background: linear-gradient(135deg, var(--primary-dark), #5a1fd6);
            box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            background: transparent;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-size: 1.3rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--primary-glow);
        }

        /* Mobile Nav */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(18px);
                border-radius: var(--radius);
                padding: 16px 20px;
                margin-top: 12px;
                border: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
            }
            .navbar-nav {
                flex-direction: column;
                gap: 2px;
                width: 100%;
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: var(--bg-dark-alt);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            transform: scale(1.02);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1.04);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.88) 0%, rgba(10, 14, 26, 0.60) 50%, rgba(10, 14, 26, 0.85) 100%);
            z-index: 1;
        }
        .hero-overlay::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            padding: 40px 24px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: 4rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.12;
            margin-bottom: 20px;
            color: var(--text-light);
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary), #a78bfa, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-hero {
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .btn-hero-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 6px 30px rgba(0, 212, 255, 0.3);
        }
        .btn-hero-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 40px rgba(0, 212, 255, 0.45);
            color: #fff;
        }
        .btn-hero-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            border: 1px solid var(--border-color);
            backdrop-filter: blur(4px);
        }
        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 48px;
            justify-content: center;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-dim);
            margin-top: 4px;
            letter-spacing: 0.03em;
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px 32px;
            }
            .hero-stat-number {
                font-size: 1.6rem;
            }
            .hero {
                min-height: 80vh;
            }
            .btn-hero {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-hero {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== Features / Core Values ===== */
        .features-section {
            background: var(--bg-section);
            position: relative;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            background: rgba(0, 212, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(0, 212, 255, 0.18);
            box-shadow: 0 0 24px var(--primary-glow);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-light);
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-padding {
                padding: 60px 0;
            }
        }

        /* ===== Category Entry ===== */
        .categories-section {
            background: var(--bg-dark-alt);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            min-height: 320px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .category-card-img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
            z-index: 0;
        }
        .category-card:hover .category-card-img {
            transform: scale(1.06);
        }
        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 14, 26, 0.92) 0%, rgba(10, 14, 26, 0.30) 60%, rgba(10, 14, 26, 0.10) 100%);
            z-index: 1;
        }
        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
        }
        .category-card-body h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .category-card-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 16px;
            max-width: 80%;
        }
        .category-card-body .btn-category {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.12);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(0, 212, 255, 0.2);
            transition: var(--transition);
            text-decoration: none;
        }
        .category-card-body .btn-category:hover {
            background: rgba(0, 212, 255, 0.22);
            border-color: var(--primary);
            box-shadow: 0 0 24px var(--primary-glow);
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .category-card {
                min-height: 260px;
            }
            .category-card-body h3 {
                font-size: 1.3rem;
            }
            .category-card-body p {
                max-width: 100%;
            }
        }

        /* ===== Latest News / CMS List ===== */
        .news-section {
            background: var(--bg-section);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px 28px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 0.82rem;
            color: var(--text-dim);
        }
        .news-card .news-meta .news-category {
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.08);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.75rem;
            border: 1px solid rgba(0, 212, 255, 0.12);
        }
        .news-card .news-meta .news-date {
            color: var(--text-dim);
        }
        .news-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: var(--transition);
        }
        .news-card:hover h3 {
            color: var(--primary);
        }
        .news-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card .news-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 500;
            font-size: 0.9rem;
            text-decoration: none;
            align-self: flex-start;
        }
        .news-card .news-link:hover {
            color: #66e3ff;
            gap: 10px;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-dim);
            font-size: 1.05rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                padding: 18px 20px;
            }
            .news-card h3 {
                font-size: 1rem;
            }
        }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: var(--bg-dark-alt);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(0, 212, 255, 0.04), transparent 70%);
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }
        .stat-card:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .stat-card .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
            opacity: 0.6;
        }

        @media (max-width: 991.98px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== Process / Steps ===== */
        .process-section {
            background: var(--bg-section);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.2;
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 24px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .step-item:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin: 0 auto 16px;
            box-shadow: 0 0 24px var(--primary-glow);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-dark-alt);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            color: var(--text-light);
            font-size: 1.05rem;
            font-weight: 600;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-section);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 50% 80%, rgba(0, 212, 255, 0.06), transparent 70%);
            pointer-events: none;
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(123, 47, 247, 0.06));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-box .btn-cta {
            padding: 16px 44px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            box-shadow: 0 6px 30px rgba(0, 212, 255, 0.25);
        }
        .cta-box .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4);
            color: #fff;
        }

        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
            .cta-box .btn-cta {
                padding: 14px 32px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark-alt);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 12px;
            display: inline-block;
        }
        .footer-brand .footer-logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            color: var(--text-dim);
            font-size: 0.9rem;
            max-width: 300px;
            line-height: 1.7;
        }
        .footer h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer ul li {
            margin-bottom: 8px;
        }
        .footer ul li a {
            color: var(--text-dim);
            font-size: 0.9rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-dim);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-dim);
            font-size: 1rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-social a:hover {
            background: rgba(0, 212, 255, 0.12);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        @media (max-width: 991.98px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-social {
                justify-content: center;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-dim);
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.7s ease forwards;
        }
        .animate-in-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-in-delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            z-index: 1040;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.45);
        }

/* roulang page: article */
:root {
            --primary: #00f5d4;
            --primary-dark: #00c9b0;
            --primary-glow: rgba(0, 245, 212, 0.35);
            --secondary: #7b2ff7;
            --secondary-glow: rgba(123, 47, 247, 0.3);
            --accent: #ff6b6b;
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-card-hover: #1a2332;
            --bg-section: #0d1117;
            --bg-elevated: #1a2332;
            --text-primary: #f0f4ff;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: rgba(0, 245, 212, 0.12);
            --border-glow: rgba(0, 245, 212, 0.25);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(0, 245, 212, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }

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

        /* ===== HEADER / NAV ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
            transition: var(--transition);
        }

        .navbar {
            padding: 12px 0;
            transition: var(--transition);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--text-primary) !important;
            letter-spacing: 0.5px;
        }

        .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            font-size: 1.1rem;
            color: #fff;
            font-weight: 800;
            box-shadow: 0 0 20px var(--primary-glow);
        }

        .navbar-brand .brand-text {
            background: linear-gradient(90deg, var(--text-primary), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-primary) !important;
            background: rgba(0, 245, 212, 0.06);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary) !important;
            background: rgba(0, 245, 212, 0.1);
            box-shadow: inset 0 -2px 0 var(--primary);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--primary-glow);
        }

        .navbar-nav .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: #0a0e1a !important;
            font-weight: 700 !important;
            padding: 8px 24px !important;
            border-radius: 50px !important;
            box-shadow: 0 0 24px var(--primary-glow);
            transition: var(--transition);
            margin-left: 8px;
        }

        .navbar-nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px var(--primary-glow);
            color: #0a0e1a !important;
            background: linear-gradient(135deg, #00ffdd, var(--primary-dark)) !important;
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 8px 14px;
            font-size: 1.2rem;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: var(--transition);
        }

        .navbar-toggler:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--primary-glow);
            outline: none;
        }

        @media (max-width: 991px) {
            .navbar-nav .nav-link {
                padding: 12px 20px !important;
                text-align: center;
            }
            .navbar-nav .nav-link.active::after {
                width: 40%;
            }
            .navbar-nav .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .navbar-collapse {
                background: rgba(10, 14, 26, 0.98);
                border-radius: var(--radius-md);
                padding: 12px 8px;
                margin-top: 12px;
                border: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
            }
        }

        /* ===== MAIN CONTENT ===== */
        .main-wrapper {
            padding-top: 80px;
            min-height: 80vh;
        }

        /* ===== ARTICLE HERO / BANNER ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.95), rgba(17, 24, 39, 0.9)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, var(--primary-glow) 0%, transparent 60%);
            opacity: 0.15;
            pointer-events: none;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
        }

        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-breadcrumb a {
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .article-breadcrumb a:hover {
            color: var(--primary);
        }

        .article-breadcrumb .separator {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

        .article-breadcrumb .current {
            color: var(--primary);
        }

        .article-category-badge {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(0, 245, 212, 0.12);
            border: 1px solid var(--border-glow);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            max-width: 900px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            align-items: center;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-item i {
            color: var(--primary);
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 60px 0 40px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-meta {
                gap: 16px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        /* ===== ARTICLE BODY ===== */
        .article-body-section {
            padding: 60px 0 80px;
            background: var(--bg-section);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }

        .article-content {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }

        .article-content .featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
        }

        .article-content p {
            margin-bottom: 1.4rem;
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 12px;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 24px;
            color: var(--text-secondary);
        }

        .article-content li {
            margin-bottom: 6px;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(0, 245, 212, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content .content-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(123, 47, 247, 0.12);
            border: 1px solid rgba(123, 47, 247, 0.2);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--secondary);
            margin-right: 6px;
            margin-bottom: 6px;
        }

        .article-footer-meta {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

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

        .article-share {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .article-share span {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-elevated);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .article-share a:hover {
            background: var(--primary);
            color: #0a0e1a;
            border-color: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
            transform: translateY(-2px);
        }

        @media (max-width: 991px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-content {
                padding: 32px 24px;
            }
        }

        @media (max-width: 520px) {
            .article-content {
                padding: 20px 16px;
            }
            .article-content p {
                font-size: 0.95rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-footer-meta {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== SIDEBAR ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .sidebar-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }

        .sidebar-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-card h4 i {
            color: var(--primary);
            font-size: 1rem;
        }

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

        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

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

        .sidebar-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .sidebar-list a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .sidebar-list a span {
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(0, 245, 212, 0.08), rgba(123, 47, 247, 0.08));
            border: 1px solid var(--border-glow);
            text-align: center;
            padding: 32px 24px;
        }

        .sidebar-cta h4 {
            justify-content: center;
        }

        .sidebar-cta p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }

        .sidebar-cta .btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a;
            font-weight: 700;
            padding: 10px 32px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 0 24px var(--primary-glow);
            transition: var(--transition);
        }

        .sidebar-cta .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px var(--primary-glow);
        }

        @media (max-width: 991px) {
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

        /* ===== NOT FOUND ===== */
        .not-found-wrapper {
            padding: 100px 0;
            text-align: center;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .not-found-wrapper .not-found-icon {
            font-size: 4rem;
            color: var(--primary);
            margin-bottom: 24px;
            opacity: 0.6;
        }

        .not-found-wrapper h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .not-found-wrapper p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }

        .not-found-wrapper .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0a0e1a;
            font-weight: 700;
            padding: 12px 36px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 0 24px var(--primary-glow);
            transition: var(--transition);
            font-size: 1rem;
        }

        .not-found-wrapper .btn-home:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px var(--primary-glow);
            color: #0a0e1a;
        }

        /* ===== RELATED ARTICLES ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
        }

        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 36px;
            text-align: center;
            letter-spacing: -0.3px;
        }

        .related-section .section-title span {
            color: var(--primary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }

        .related-card .card-body {
            padding: 20px 22px 24px;
        }

        .related-card .card-category {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(0, 245, 212, 0.1);
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .related-card h5 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card:hover h5 {
            color: var(--primary);
        }

        .related-card .card-text {
            color: var(--text-muted);
            font-size: 0.85rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .related-card .card-meta i {
            margin-right: 4px;
            font-size: 0.7rem;
        }

        @media (max-width: 991px) {
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
        }

        /* ===== FOOTER ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            display: inline-block;
            margin-bottom: 16px;
            background: linear-gradient(90deg, var(--text-primary), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--primary-glow);
        }

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

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

        .footer ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer ul li i {
            color: var(--primary);
            width: 18px;
            font-size: 0.85rem;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-elevated);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-size: 1rem;
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #0a0e1a;
            border-color: var(--primary);
            box-shadow: 0 0 20px var(--primary-glow);
            transform: translateY(-3px);
        }

        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== SCROLLBAR ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

        /* ===== UTILITY ===== */
        .text-gradient {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .glow-border {
            border: 1px solid var(--border-glow);
            box-shadow: 0 0 20px var(--primary-glow);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00f5d4;
            --primary-dark: #00c9b0;
            --primary-glow: rgba(0, 245, 212, 0.3);
            --secondary: #f72585;
            --secondary-glow: rgba(247, 37, 133, 0.3);
            --accent: #7209b7;
            --dark-bg: #0a0e17;
            --dark-card: #111827;
            --dark-card-hover: #1a2332;
            --dark-border: #1e293b;
            --text-light: #f1f5f9;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px var(--primary-glow);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: var(--font-sans);
            background: var(--dark-bg);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        ::selection {
            background: var(--primary);
            color: var(--dark-bg);
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== 导航 ===== */
        .navbar {
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 245, 212, 0.1);
            padding: 12px 0;
            transition: var(--transition);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-light) !important;
            font-weight: 700;
            font-size: 1.4rem;
            letter-spacing: -0.5px;
        }
        .navbar-brand:hover {
            color: var(--primary) !important;
        }
        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--dark-bg);
            box-shadow: 0 0 16px var(--primary-glow);
        }
        .brand-text {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .navbar-toggler {
            background: transparent;
            border: 1px solid rgba(0, 245, 212, 0.3);
            color: var(--primary);
            font-size: 1.3rem;
            padding: 6px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            background: rgba(0, 245, 212, 0.1);
            border-color: var(--primary);
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-item {
            position: relative;
        }
        .nav-link {
            color: var(--text-muted) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-link:hover {
            color: var(--text-light) !important;
            background: rgba(0, 245, 212, 0.08);
        }
        .nav-link.active {
            color: var(--primary) !important;
            background: rgba(0, 245, 212, 0.12);
            box-shadow: inset 0 -2px 0 var(--primary), 0 0 20px rgba(0, 245, 212, 0.1);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--primary-glow);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary)) !important;
            color: var(--dark-bg) !important;
            font-weight: 600 !important;
            padding: 8px 20px !important;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(247, 37, 133, 0.3);
            margin-left: 8px;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(247, 37, 133, 0.4);
            color: var(--dark-bg) !important;
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary)) !important;
        }

        /* 移动端导航 */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                border-radius: 16px;
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(0, 245, 212, 0.1);
                box-shadow: var(--shadow-lg);
            }
            .navbar-nav {
                flex-direction: column;
                gap: 4px;
                width: 100%;
            }
            .nav-link {
                padding: 12px 16px !important;
                width: 100%;
                text-align: left;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
            .navbar-brand {
                font-size: 1.2rem;
            }
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.92), rgba(17, 24, 39, 0.88)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(0, 245, 212, 0.08);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 245, 212, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(247, 37, 133, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-light) 40%, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner .lead {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
        }
        .page-banner .breadcrumb {
            display: flex;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-dim);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .page-banner .breadcrumb a {
            color: var(--primary);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        .page-banner .breadcrumb .sep {
            color: var(--text-dim);
        }
        .page-banner .breadcrumb .current {
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 120px 0 60px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner .lead {
                font-size: 1rem;
            }
        }

        /* ===== 分类筛选标签 ===== */
        .filter-bar {
            padding: 24px 0;
            background: rgba(17, 24, 39, 0.6);
            border-bottom: 1px solid rgba(0, 245, 212, 0.06);
            position: sticky;
            top: 70px;
            z-index: 100;
            backdrop-filter: blur(12px);
        }
        .filter-bar .container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }
        .filter-label {
            font-size: 0.85rem;
            color: var(--text-dim);
            font-weight: 500;
            margin-right: 8px;
            letter-spacing: 0.5px;
        }
        .filter-tag {
            display: inline-block;
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            border-radius: 20px;
            background: rgba(0, 245, 212, 0.06);
            color: var(--text-muted);
            border: 1px solid rgba(0, 245, 212, 0.1);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .filter-tag:hover {
            background: rgba(0, 245, 212, 0.12);
            color: var(--primary);
            border-color: rgba(0, 245, 212, 0.3);
        }
        .filter-tag.active {
            background: rgba(0, 245, 212, 0.15);
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 16px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .filter-bar {
                top: 62px;
                padding: 16px 0;
            }
            .filter-bar .container {
                gap: 8px;
            }
            .filter-tag {
                font-size: 0.8rem;
                padding: 4px 14px;
            }
        }

        /* ===== 新闻列表 ===== */
        .news-section {
            padding: 60px 0 80px;
        }
        .news-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .news-card {
            background: var(--dark-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--dark-border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 245, 212, 0.2);
            box-shadow: var(--shadow-md), 0 0 30px rgba(0, 245, 212, 0.05);
            background: var(--dark-card-hover);
        }
        .news-card .card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-bottom: 1px solid var(--dark-border);
            transition: var(--transition);
        }
        .news-card:hover .card-img {
            transform: scale(1.02);
        }
        .news-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-dim);
            margin-bottom: 12px;
        }
        .news-card .card-meta .badge {
            background: rgba(0, 245, 212, 0.15);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 12px;
            letter-spacing: 0.3px;
            border: 1px solid rgba(0, 245, 212, 0.15);
        }
        .news-card .card-meta .badge-hot {
            background: rgba(247, 37, 133, 0.15);
            color: var(--secondary);
            border-color: rgba(247, 37, 133, 0.2);
        }
        .news-card .card-meta .date {
            color: var(--text-dim);
        }
        .news-card .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .news-card:hover .card-title {
            color: var(--primary);
        }
        .news-card .card-text {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .news-card .card-footer-link {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: auto;
            transition: var(--transition);
        }
        .news-card .card-footer-link i {
            transition: var(--transition);
        }
        .news-card .card-footer-link:hover {
            color: var(--primary-dark);
        }
        .news-card .card-footer-link:hover i {
            transform: translateX(4px);
        }

        /* 头条大卡 */
        .news-featured {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--dark-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--dark-border);
            transition: var(--transition);
        }
        .news-featured:hover {
            border-color: rgba(0, 245, 212, 0.25);
            box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 245, 212, 0.06);
            transform: translateY(-4px);
        }
        .news-featured .featured-img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
        }
        .news-featured .featured-body {
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .news-featured .featured-body .badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--dark-bg);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 12px;
            margin-bottom: 16px;
            align-self: flex-start;
            letter-spacing: 0.5px;
        }
        .news-featured .featured-body h2 {
            font-size: 1.8rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
            color: var(--text-light);
        }
        .news-featured .featured-body p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .news-featured .featured-body .meta {
            font-size: 0.85rem;
            color: var(--text-dim);
        }
        @media (max-width: 992px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .news-featured {
                grid-template-columns: 1fr;
            }
            .news-featured .featured-img {
                min-height: 220px;
                max-height: 280px;
            }
            .news-featured .featured-body {
                padding: 24px 20px;
            }
            .news-featured .featured-body h2 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 576px) {
            .news-section {
                padding: 40px 0 60px;
            }
            .news-card .card-img {
                height: 180px;
            }
            .news-card .card-body {
                padding: 18px;
            }
            .news-card .card-title {
                font-size: 1.05rem;
            }
            .news-featured .featured-body {
                padding: 20px 16px;
            }
            .news-featured .featured-body h2 {
                font-size: 1.2rem;
            }
        }

        /* ===== 分页 ===== */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 50px;
            flex-wrap: wrap;
        }
        .pagination-wrap a,
        .pagination-wrap span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 14px;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 10px;
            background: var(--dark-card);
            color: var(--text-muted);
            border: 1px solid var(--dark-border);
            transition: var(--transition);
            text-decoration: none;
        }
        .pagination-wrap a:hover {
            background: rgba(0, 245, 212, 0.1);
            border-color: rgba(0, 245, 212, 0.3);
            color: var(--primary);
        }
        .pagination-wrap .active {
            background: rgba(0, 245, 212, 0.15);
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 0 16px var(--primary-glow);
            font-weight: 700;
        }
        .pagination-wrap .disabled {
            opacity: 0.4;
            cursor: not-allowed;
            pointer-events: none;
        }

        /* ===== 热门话题 ===== */
        .hot-topics {
            margin-top: 60px;
            padding: 40px 0;
            border-top: 1px solid rgba(0, 245, 212, 0.06);
        }
        .hot-topics .section-label {
            font-size: 0.85rem;
            color: var(--text-dim);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .hot-topics .section-label i {
            color: var(--secondary);
        }
        .topics-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .topic-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--dark-card);
            border-radius: 24px;
            border: 1px solid var(--dark-border);
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
        }
        .topic-item:hover {
            background: rgba(0, 245, 212, 0.08);
            border-color: rgba(0, 245, 212, 0.25);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .topic-item .count {
            background: rgba(0, 245, 212, 0.1);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 10px;
        }
        .topic-item.hot {
            border-color: rgba(247, 37, 133, 0.2);
        }
        .topic-item.hot:hover {
            border-color: rgba(247, 37, 133, 0.4);
            color: var(--secondary);
        }
        .topic-item.hot .count {
            background: rgba(247, 37, 133, 0.12);
            color: var(--secondary);
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.95), rgba(17, 24, 39, 0.9)), url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            border-top: 1px solid rgba(0, 245, 212, 0.08);
            border-bottom: 1px solid rgba(0, 245, 212, 0.08);
            text-align: center;
            position: relative;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at center, rgba(0, 245, 212, 0.04), transparent 70%);
            pointer-events: none;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-block h2 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-block p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-block .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--dark-bg);
            border: none;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            box-shadow: 0 4px 24px rgba(247, 37, 133, 0.3);
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(247, 37, 133, 0.4);
            color: var(--dark-bg);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 12px;
            background: transparent;
            color: var(--primary);
            border: 2px solid rgba(0, 245, 212, 0.3);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-outline-custom:hover {
            background: rgba(0, 245, 212, 0.08);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 0 24px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 50px 0;
            }
            .cta-block h2 {
                font-size: 1.6rem;
            }
            .cta-block p {
                font-size: 0.95rem;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: rgba(10, 14, 23, 0.98);
            border-top: 1px solid rgba(0, 245, 212, 0.06);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            margin-bottom: 16px;
            text-decoration: none;
        }
        .footer .footer-brand p {
            font-size: 0.88rem;
            color: var(--text-dim);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer ul li {
            font-size: 0.88rem;
            color: var(--text-dim);
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .footer ul li a {
            color: var(--text-dim);
            transition: var(--transition);
        }
        .footer ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            border-top: 1px solid rgba(0, 245, 212, 0.06);
            font-size: 0.82rem;
            color: var(--text-dim);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(0, 245, 212, 0.06);
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid var(--dark-border);
            text-decoration: none;
        }
        .footer .footer-social a:hover {
            background: rgba(0, 245, 212, 0.12);
            color: var(--primary);
            border-color: rgba(0, 245, 212, 0.3);
            transform: translateY(-2px);
            box-shadow: 0 0 16px var(--primary-glow);
        }
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }
        @media (max-width: 576px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--dark-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 245, 212, 0.25);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 245, 212, 0.4);
        }

        /* ===== Bootstrap 覆盖 ===== */
        .collapse:not(.show) {
            display: none;
        }
        .collapsing {
            position: relative;
            height: 0;
            overflow: hidden;
            transition: height 0.35s ease;
        }
        @media (min-width: 992px) {
            .collapse:not(.show) {
                display: block !important;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00f0ff;
            --primary-dark: #00b8c8;
            --primary-light: #66f5ff;
            --accent: #ff6b35;
            --accent-light: #ff8f5e;
            --bg-dark: #0b0e1a;
            --bg-darker: #060810;
            --bg-card: #11162b;
            --bg-card-hover: #1a2140;
            --bg-section-alt: #0d1225;
            --text-main: #e8edf5;
            --text-muted: #8899b4;
            --text-bright: #ffffff;
            --border-color: #1e2a4a;
            --border-glow: rgba(0, 240, 255, 0.25);
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --nav-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--nav-height);
        }

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

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(6, 8, 16, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
            height: var(--nav-height);
            transition: var(--transition);
        }

        .navbar {
            padding: 0;
            height: var(--nav-height);
            background: transparent !important;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-bright) !important;
            letter-spacing: 0.5px;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }

        .brand-text {
            background: linear-gradient(135deg, var(--text-bright), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav {
            gap: 4px;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            color: var(--text-muted) !important;
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            letter-spacing: 0.3px;
            position: relative;
        }

        .nav-link:hover {
            color: var(--text-bright) !important;
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-link.active {
            color: var(--text-bright) !important;
            background: rgba(0, 240, 255, 0.12);
            box-shadow: inset 0 -2px 0 var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary);
            border-radius: 2px;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark)) !important;
            color: var(--bg-darker) !important;
            font-weight: 600 !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.25);
            transition: var(--transition);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
            color: var(--bg-darker) !important;
            background: linear-gradient(135deg, var(--primary-light), var(--primary)) !important;
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: transparent;
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-darker);
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(6, 8, 16, 0.85) 0%, rgba(11, 14, 26, 0.7) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-bright);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-banner h1 span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
        }
        .page-banner .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 20px;
            font-size: 0.9rem;
        }
        .page-banner .breadcrumb-item {
            color: var(--text-muted);
        }
        .page-banner .breadcrumb-item a {
            color: var(--primary);
        }
        .page-banner .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
            content: '›';
        }
        .page-banner .breadcrumb-item.active {
            color: var(--text-bright);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-bright);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 48px;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin-bottom: 20px;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }

        /* ===== 服务分类卡片 ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card .icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 18px;
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            width: 64px;
            height: 64px;
            line-height: 64px;
            border-radius: 50%;
            transition: var(--transition);
        }
        .service-card:hover .icon {
            background: rgba(0, 240, 255, 0.2);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.15);
        }
        .service-card h5 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-bright);
            margin-bottom: 8px;
        }
        .service-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== 热门服务卡片（图文） ===== */
        .hot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .hot-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .hot-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
        }
        .hot-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .hot-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .hot-card:hover .card-img img {
            transform: scale(1.06);
        }
        .hot-card .card-img .badge-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
        }
        .hot-card .card-body {
            padding: 24px 22px 26px;
        }
        .hot-card .card-body h5 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-bright);
            margin-bottom: 8px;
        }
        .hot-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .hot-card .card-body .meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
        }
        .hot-card .card-body .meta .views i {
            margin-right: 4px;
            color: var(--primary);
        }
        .hot-card .card-body .btn-sm-link {
            color: var(--primary);
            font-weight: 500;
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .hot-card .card-body .btn-sm-link:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        /* ===== 服务流程 ===== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .flow-step {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
            counter-increment: step;
        }
        .flow-step:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .flow-step .step-num {
            width: 48px;
            height: 48px;
            line-height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--bg-darker);
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 18px;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.2);
        }
        .flow-step h5 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-bright);
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 0.86rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .flow-step .step-arrow {
            position: absolute;
            right: -14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary);
            font-size: 1.2rem;
            opacity: 0.5;
        }
        .flow-step:last-child .step-arrow {
            display: none;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
        }
        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        /* ===== 用户评价 ===== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px 26px;
            transition: var(--transition);
        }
        .review-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .review-card .stars {
            color: #ffc107;
            font-size: 0.95rem;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }
        .review-card blockquote {
            font-size: 0.95rem;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 18px;
            font-style: italic;
        }
        .review-card .user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }
        .review-card .user .avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: #fff;
            font-size: 0.9rem;
        }
        .review-card .user .name {
            font-weight: 600;
            color: var(--text-bright);
            font-size: 0.92rem;
        }
        .review-card .user .title {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 0;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 20px 28px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-bright);
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .icon {
            font-size: 1.1rem;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-question[aria-expanded="true"] .icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 28px 20px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-answer.collapse:not(.show) {
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.06), rgba(255, 107, 53, 0.06));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            backdrop-filter: blur(4px);
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-bright);
            margin-bottom: 12px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-box .btn-cta {
            display: inline-block;
            padding: 14px 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--bg-darker);
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.25);
            transition: var(--transition);
            border: none;
        }
        .cta-box .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.4);
            color: var(--bg-darker);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-bright);
            display: inline-block;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-bright), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer h5 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-bright);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer ul {
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .footer ul li a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hot-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .container {
                padding: 0 18px;
            }
            .section {
                padding: 60px 0;
            }
            .page-banner {
                padding: 80px 0 60px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .service-card {
                padding: 24px 16px;
            }
            .hot-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .flow-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .flow-step .step-arrow {
                display: none;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .number {
                font-size: 2.2rem;
            }
            .review-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .navbar-nav {
                background: var(--bg-darker);
                padding: 16px;
                border-radius: var(--radius-md);
                border: 1px solid var(--border-color);
                margin-top: 8px;
            }
            .navbar-toggler {
                display: block;
            }
            .navbar-collapse {
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(6, 8, 16, 0.98);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-color);
                padding: 12px 24px;
            }
        }

        @media (max-width: 520px) {
            .service-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .service-card {
                padding: 18px 12px;
            }
            .service-card .icon {
                width: 48px;
                height: 48px;
                line-height: 48px;
                font-size: 1.6rem;
            }
            .service-card h5 {
                font-size: 0.9rem;
            }
            .service-card p {
                font-size: 0.78rem;
            }
            .flow-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .flow-step {
                padding: 20px 16px;
            }
            .flow-step .step-num {
                width: 38px;
                height: 38px;
                line-height: 38px;
                font-size: 1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .number {
                font-size: 1.8rem;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .cta-box .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.86rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .glow-border {
            border-color: var(--primary) !important;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.12);
        }
        .mt-1 {
            margin-top: 4px;
        }
        .mb-1 {
            margin-bottom: 4px;
        }
        .mb-2 {
            margin-bottom: 8px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }
        .mb-5 {
            margin-bottom: 40px;
        }