/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d1b3e;
            --primary-light: #1a2f5a;
            --primary-dark: #070f24;
            --accent: #d4a843;
            --accent-light: #e8c56a;
            --accent-dark: #b88e2e;
            --highlight: #e84c3d;
            --highlight-light: #f06a5e;
            --bg-light: #f5f6fa;
            --bg-dark: #0a0f1f;
            --bg-card: #ffffff;
            --text-primary: #0d1b3e;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-radius: 12px;
            --border-radius-lg: 20px;
            --border-radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(13, 27, 62, 0.06);
            --shadow-md: 0 8px 30px rgba(13, 27, 62, 0.10);
            --shadow-lg: 0 20px 60px rgba(13, 27, 62, 0.15);
            --shadow-glow: 0 0 40px rgba(212, 168, 67, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1280px;
            --nav-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--border-radius);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: 3rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

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

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(13, 27, 62, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(212, 168, 67, 0.15);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(13, 27, 62, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--text-white);
            opacity: 0.9;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 50px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a i {
            font-size: 0.85rem;
            color: var(--accent);
            opacity: 0.6;
        }
        .nav-links a:hover {
            color: var(--text-white);
            background: rgba(212, 168, 67, 0.12);
        }
        .nav-links a.active {
            color: var(--text-white);
            background: rgba(212, 168, 67, 0.18);
            box-shadow: inset 0 0 0 1px rgba(212, 168, 67, 0.25);
        }
        .nav-links a.active i {
            opacity: 1;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 24px !important;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark)) !important;
            color: var(--primary-dark) !important;
            font-weight: 700 !important;
            border-radius: 50px !important;
            box-shadow: 0 4px 20px rgba(212, 168, 67, 0.35);
        }
        .nav-cta i {
            color: var(--primary-dark) !important;
            opacity: 1 !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.45) !important;
            background: linear-gradient(135deg, var(--accent-light), var(--accent)) !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--border-radius-sm);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1.15);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 62, 0.92) 40%, rgba(13, 27, 62, 0.6) 70%, rgba(13, 27, 62, 0.3) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 60px 24px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            max-width: var(--container-max);
            margin: 0 auto;
        }
        .hero-text {
            max-width: 640px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(212, 168, 67, 0.15);
            border: 1px solid rgba(212, 168, 67, 0.25);
            border-radius: 50px;
            color: var(--accent-light);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            animation: pulseBadge 2s ease-in-out infinite;
        }
        @keyframes pulseBadge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(212, 168, 67, 0.2);
            }
            50% {
                box-shadow: 0 0 20px 4px rgba(212, 168, 67, 0.15);
            }
        }
        .hero-badge i {
            color: var(--highlight-light);
            font-size: 0.7rem;
            animation: blink 1.5s step-end infinite;
        }
        @keyframes blink {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.2;
            }
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 540px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            border: none;
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.35);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212, 168, 67, 0.45);
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: var(--primary-dark);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline-custom:hover {
            border-color: var(--accent);
            color: var(--accent-light);
            background: rgba(212, 168, 67, 0.08);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            font-weight: 500;
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-visual img {
            border-radius: var(--border-radius-lg);
            box-shadow: var(--shadow-lg);
            max-height: 480px;
            width: 100%;
            object-fit: cover;
            border: 1px solid rgba(212, 168, 67, 0.15);
        }
        .hero-float-card {
            position: absolute;
            bottom: -20px;
            left: -20px;
            background: rgba(13, 27, 62, 0.92);
            backdrop-filter: blur(16px);
            padding: 16px 24px;
            border-radius: var(--border-radius);
            border: 1px solid rgba(212, 168, 67, 0.2);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            gap: 12px;
            animation: floatUp 3s ease-in-out infinite;
        }
        @keyframes floatUp {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-8px);
            }
        }
        .hero-float-card i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .hero-float-card span {
            color: var(--text-white);
            font-weight: 600;
            font-size: 0.95rem;
        }
        .hero-float-card small {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 100px 0;
        }
        .section-alt {
            background: var(--bg-light);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--text-white);
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.1rem;
            color: var(--text-secondary);
        }
        .section-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(212, 168, 67, 0.12);
            color: var(--accent-dark);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-dark .section-tag {
            background: rgba(212, 168, 67, 0.15);
            color: var(--accent-light);
        }

        /* ===== Features / Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            padding: 32px 28px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.2);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(212, 168, 67, 0.1);
            border-radius: var(--border-radius-sm);
            margin-bottom: 20px;
            font-size: 1.6rem;
            color: var(--accent-dark);
        }
        .feature-card h4 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== Category Entry ===== */
        .category-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .category-showcase.reverse {
            direction: rtl;
        }
        .category-showcase.reverse>* {
            direction: ltr;
        }
        .category-info h3 {
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .category-info p {
            font-size: 1.05rem;
            margin-bottom: 24px;
        }
        .category-info .btn-primary-custom {
            padding: 12px 28px;
            font-size: 0.95rem;
        }
        .category-image {
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .category-image img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-image:hover img {
            transform: scale(1.03);
        }

        /* ===== News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.2);
        }
        .news-card-img {
            height: 200px;
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
            border-radius: 0;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }
        .news-card-body {
            padding: 20px 24px 24px;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-card-meta .badge-custom {
            padding: 2px 12px;
            background: rgba(212, 168, 67, 0.12);
            color: var(--accent-dark);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.7rem;
            text-transform: uppercase;
        }
        .news-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card h4 a {
            color: var(--text-primary);
        }
        .news-card h4 a:hover {
            color: var(--accent-dark);
        }
        .news-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .news-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-dark);
        }
        .news-card .read-more i {
            transition: var(--transition);
        }
        .news-card .read-more:hover i {
            transform: translateX(4px);
        }
        .news-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .news-empty i {
            font-size: 3rem;
            color: var(--border-color);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== Statistics / Data Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--border-radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(212, 168, 67, 0.15);
            transform: translateY(-4px);
        }
        .stat-card .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 500;
            margin-top: 6px;
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: rgba(212, 168, 67, 0.2);
            margin-bottom: 12px;
        }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 0.9rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(212, 168, 67, 0.3);
        }
        .step-card .step-icon {
            font-size: 2.2rem;
            color: var(--accent-dark);
            margin-bottom: 16px;
            margin-top: 8px;
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 67, 0.2);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question i {
            color: var(--accent);
            font-size: 0.85rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary-custom {
            font-size: 1.1rem;
            padding: 16px 44px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(212, 168, 67, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h5 {
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.8rem;
            margin-bottom: 0;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            color: rgba(255, 255, 255, 0.4);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 991px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(13, 27, 62, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(212, 168, 67, 0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-links a {
                padding: 12px 20px;
                border-radius: var(--border-radius-sm);
                width: 100%;
            }
            .nav-links a.nav-cta {
                margin-top: 8px;
                justify-content: center;
            }
            .hero-content {
                grid-template-columns: 1fr;
                gap: 40px;
                padding: 40px 24px 60px;
                text-align: center;
            }
            .hero-text {
                max-width: 100%;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-desc {
                margin: 0 auto 28px;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-visual img {
                max-height: 320px;
            }
            .hero-float-card {
                left: 10px;
                bottom: -10px;
                padding: 12px 18px;
            }
            .category-showcase {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-showcase.reverse {
                direction: ltr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .section {
                padding: 64px 0;
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            .section-header {
                margin-bottom: 40px;
            }
            .hero-stat-num {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 767px) {
            :root {
                --nav-height: 64px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid .stat-card {
                padding: 24px 16px;
            }
            .stat-card .stat-num {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .hero-float-card {
                display: none;
            }
            .category-info h3 {
                font-size: 1.5rem;
            }
            .category-image img {
                height: 220px;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .hero-stat-item {
                text-align: center;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .container {
                padding: 0 16px;
            }
            .hero-content {
                padding: 24px 16px 40px;
            }
            .news-card-img {
                height: 160px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent-dark);
        }
        .text-accent-light {
            color: var(--accent-light);
        }
        .mb-0 {
            margin-bottom: 0 !important;
        }
        .mt-2 {
            margin-top: 20px;
        }
        .gap-2 {
            gap: 20px;
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            background: var(--accent);
            color: var(--primary-dark);
            border: none;
            border-radius: 50%;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            opacity: 0;
            transform: translateY(20px);
            transition: var(--transition);
            z-index: 1040;
        }
        .back-top.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        /* ===== Countdown (cosmetic) ===== */
        .countdown-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 20px;
            background: rgba(212, 168, 67, 0.08);
            border-radius: var(--border-radius-sm);
            border: 1px solid rgba(212, 168, 67, 0.12);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .countdown-bar i {
            color: var(--highlight);
            font-size: 0.9rem;
        }
        .countdown-bar span {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            font-weight: 500;
        }
        .countdown-bar .countdown-num {
            color: var(--accent-light);
            font-weight: 700;
            font-size: 1.1rem;
            background: rgba(0, 0, 0, 0.2);
            padding: 2px 10px;
            border-radius: 4px;
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0b3d6b;
            --primary-light: #1a5c9e;
            --primary-dark: #062a4a;
            --accent: #f5a623;
            --accent-light: #ffc857;
            --accent-dark: #d4891a;
            --bg-body: #f8fafc;
            --bg-dark: #0a1a2f;
            --bg-card: #ffffff;
            --bg-section-alt: #eef3f8;
            --text-main: #1e2a3a;
            --text-light: #4a5a6e;
            --text-muted: #7a8a9e;
            --text-white: #f0f4fa;
            --border-color: #dce3ed;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.12);
            --shadow-glow: 0 4px 20px rgba(245, 166, 35, 0.30);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-main);
        }
        p {
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header / Navigation (共用) ===== */
        .site-header {
            background: var(--bg-dark);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-white) !important;
            text-decoration: none !important;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(245, 166, 35, 0.4));
        }
        .logo span {
            background: linear-gradient(135deg, #f5f9ff, #c0d4f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            color: rgba(255, 255, 255, 0.75);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .nav-links a i {
            font-size: 0.95rem;
        }
        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: #fff;
            background: rgba(255, 255, 255, 0.10);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary-light);
            box-shadow: 0 2px 12px rgba(26, 92, 158, 0.35);
        }
        .nav-links a.nav-cta {
            background: var(--accent);
            color: #0a1a2f;
            font-weight: 700;
            padding: 8px 22px;
            border-radius: 50px;
            box-shadow: var(--shadow-glow);
            margin-left: 6px;
        }
        .nav-links a.nav-cta:hover {
            background: var(--accent-light);
            transform: scale(1.03);
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.45);
        }

        /* ===== Footer (共用) ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            padding: 4px 0;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.2rem;
            transition: color var(--transition), transform var(--transition);
        }
        .footer-social a:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== Page Hero (分类页 Banner) ===== */
        .page-hero {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 20px 60px;
            isolation: isolate;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 26, 47, 0.88) 0%, rgba(11, 61, 107, 0.72) 100%);
            z-index: 0;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 1;
            max-width: 780px;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #0a1a2f;
            font-weight: 700;
            font-size: 0.85rem;
            padding: 6px 20px;
            border-radius: 50px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            box-shadow: var(--shadow-glow);
            animation: pulse-badge 2.4s ease-in-out infinite;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                transform: scale(1);
                opacity: 1;
            }
            50% {
                transform: scale(1.04);
                opacity: 0.92;
            }
        }
        .page-hero .hero-stats {
            display: flex;
            gap: 32px;
            justify-content: center;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .page-hero .hero-stats .stat-item {
            color: rgba(255, 255, 255, 0.9);
            font-size: 0.95rem;
        }
        .page-hero .hero-stats .stat-item strong {
            color: var(--accent);
            font-size: 1.3rem;
            display: block;
        }

        /* ===== Section Spacing ===== */
        section {
            padding: 72px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            text-align: center;
            color: var(--text-main);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* ===== Intro Section ===== */
        .intro-section {
            background: var(--bg-card);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-grid .text-col h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .intro-grid .text-col p {
            color: var(--text-light);
            font-size: 1rem;
            line-height: 1.8;
        }
        .intro-grid .text-col .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }
        .intro-grid .text-col .intro-tags span {
            background: var(--bg-section-alt);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
        }
        .intro-grid .image-col {
            background: var(--bg-section-alt);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            min-height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .intro-grid .image-col img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        /* ===== Login Methods (Cards) ===== */
        .methods-section {
            background: var(--bg-section-alt);
        }
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            text-align: center;
        }
        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .method-card .card-icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            background: var(--bg-section-alt);
            width: 64px;
            height: 64px;
            line-height: 64px;
            border-radius: 50%;
            display: inline-block;
            transition: all var(--transition);
        }
        .method-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.06);
        }
        .method-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .method-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .method-card .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 16px;
            max-height: 160px;
        }
        .method-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }
        .method-card .badge-tag {
            display: inline-block;
            background: var(--accent);
            color: #0a1a2f;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 50px;
            margin-top: 4px;
        }

        /* ===== Process / Steps ===== */
        .process-section {
            background: var(--bg-card);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-section-alt);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-item .step-num {
            counter-increment: step-counter;
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-light);
            opacity: 0.25;
            line-height: 1;
            margin-bottom: 4px;
        }
        .step-item .step-num::before {
            content: counter(step-counter);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

        /* ===== Features / Highlights ===== */
        .features-section {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
        }
        .features-section .section-title {
            color: #fff;
        }
        .features-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
            backdrop-filter: blur(4px);
        }
        .feature-card:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }
        .feature-card .f-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .feature-card h4 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .feature-card .f-stat {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 4px;
            line-height: 1.2;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-card);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-section-alt);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            padding: 0 20px;
            transition: all var(--transition);
        }
        .faq-item summary {
            padding: 18px 0;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            color: var(--text-main);
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            color: var(--primary-light);
            font-size: 1.1rem;
            transition: transform var(--transition);
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 0 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            isolation: isolate;
            text-align: center;
            padding: 80px 20px;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 26, 47, 0.92) 0%, rgba(11, 61, 107, 0.78) 100%);
            z-index: 0;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #0a1a2f;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: var(--shadow-glow);
            text-decoration: none;
        }
        .cta-section .cta-btn:hover {
            background: var(--accent-light);
            transform: scale(1.04);
            box-shadow: 0 8px 32px rgba(245, 166, 35, 0.50);
            color: #0a1a2f;
        }
        .cta-section .cta-btn i {
            font-size: 1.1rem;
        }
        .cta-section .cta-safe {
            margin-top: 18px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-section .cta-safe i {
            margin-right: 6px;
        }

        /* ===== Status Bar (实时状态) ===== */
        .live-status {
            background: var(--bg-dark);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 10px 0;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.85rem;
        }
        .live-status .status-inner {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
        }
        .live-status .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: #22c55e;
            border-radius: 50%;
            margin-right: 6px;
            animation: blink-dot 1.6s ease-in-out infinite;
        }
        @keyframes blink-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }
        .live-status .status-item i {
            margin-right: 6px;
            color: var(--accent);
        }
        .live-status .status-item strong {
            color: #fff;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-section-alt);
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .breadcrumb-bar a {
            color: var(--primary-light);
        }
        .breadcrumb-bar a:hover {
            color: var(--accent);
        }
        .breadcrumb-bar .sep {
            margin: 0 8px;
            color: var(--border-color);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-grid .image-col {
                min-height: 220px;
                order: -1;
            }
            .methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                background: var(--bg-dark);
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                padding: 16px 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: var(--shadow-lg);
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-links a.nav-cta {
                margin-left: 0;
                margin-top: 4px;
                text-align: center;
                justify-content: center;
            }
            .header-inner {
                height: 60px;
            }
            .logo {
                font-size: 1.2rem;
            }
            .logo i {
                font-size: 1.3rem;
            }

            .page-hero {
                min-height: 280px;
                padding: 60px 16px 40px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .page-hero p {
                font-size: 0.98rem;
            }
            .page-hero .hero-stats {
                gap: 16px;
            }
            .page-hero .hero-stats .stat-item {
                font-size: 0.85rem;
            }
            .page-hero .hero-stats .stat-item strong {
                font-size: 1.1rem;
            }

            section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }

            .methods-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .cta-btn {
                padding: 14px 28px;
                font-size: 1rem;
            }

            .live-status .status-inner {
                flex-direction: column;
                gap: 6px;
                align-items: center;
            }
            .breadcrumb-bar {
                font-size: 0.82rem;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 12px;
            }
            .logo {
                font-size: 1rem;
                gap: 6px;
            }
            .logo i {
                font-size: 1.1rem;
            }
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .intro-grid .image-col {
                min-height: 180px;
            }
            .method-card {
                padding: 20px 16px;
            }
            .feature-card {
                padding: 24px 16px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Smooth Scroll Offset ===== */
        .scroll-offset {
            scroll-margin-top: 80px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d6efd;
            --primary-dark: #0a58ca;
            --primary-light: #cfe2ff;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #ef4444;
            --bg: #f0f2f5;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #111827;
            --text: #111827;
            --text-light: #6b7280;
            --text-white: #ffffff;
            --border: #e5e7eb;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
            --transition: 0.25s ease;
            --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; }

        /* ===== Container ===== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky; top: 0; z-index: 1000;
            height: var(--header-height);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.35rem; font-weight: 700;
            color: var(--text); text-decoration: none;
        }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: var(--text); }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 16px; border-radius: var(--radius-sm);
            font-size: 0.95rem; font-weight: 500;
            color: var(--text-light); text-decoration: none;
            transition: all var(--transition);
            display: flex; align-items: center; gap: 6px;
            position: relative;
        }
        .nav-links a i { font-size: 0.9rem; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-light); }
        .nav-links a.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 24px; height: 3px; background: var(--primary); border-radius: 2px; }
        .nav-links a.nav-cta {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: #fff; font-weight: 600;
            padding: 10px 22px; border-radius: var(--radius-sm);
            box-shadow: 0 4px 12px rgba(245,158,11,0.3);
        }
        .nav-links a.nav-cta:hover { background: linear-gradient(135deg, var(--secondary-dark), #b45309); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(245,158,11,0.4); }
        .nav-links a.nav-cta i { color: #fff; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
        .nav-toggle:hover { background: var(--bg); }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: var(--text-white);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(17,24,39,0.85) 0%, rgba(13,110,253,0.45) 100%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-breadcrumb {
            display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
            font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.8); text-decoration: none; }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb .sep { color: rgba(255,255,255,0.4); }
        .article-banner h1 {
            font-size: 2.6rem; font-weight: 800;
            line-height: 1.25; margin-bottom: 20px;
            max-width: 900px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
            font-size: 0.95rem; color: rgba(255,255,255,0.8);
        }
        .article-meta .badge {
            background: var(--secondary); color: #111;
            padding: 4px 14px; border-radius: 20px; font-weight: 600; font-size: 0.8rem;
        }
        .article-meta i { margin-right: 6px; }

        /* ===== Article Content ===== */
        .article-section { padding: 50px 0 40px; }
        .article-wrapper { display: flex; gap: 40px; }
        .article-main { flex: 1; min-width: 0; }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 40px 48px;
        }
        .article-content {
            font-size: 1.05rem; line-height: 1.85; color: var(--text);
        }
        .article-content h2, .article-content h3, .article-content h4 {
            margin-top: 2em; margin-bottom: 0.8em; font-weight: 700;
            color: var(--text);
        }
        .article-content h2 { font-size: 1.65rem; border-bottom: 2px solid var(--border); padding-bottom: 8px; }
        .article-content h3 { font-size: 1.35rem; }
        .article-content p { margin-bottom: 1.2em; }
        .article-content ul, .article-content ol { margin-bottom: 1.2em; padding-left: 1.5em; }
        .article-content li { margin-bottom: 0.4em; list-style: disc; }
        .article-content ol li { list-style: decimal; }
        .article-content a { color: var(--primary); text-decoration: underline; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px; margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: #1e3a5f;
        }
        .article-content img {
            border-radius: var(--radius-sm); margin: 1.5em 0;
            box-shadow: var(--shadow);
        }
        .article-content code {
            background: #f3f4f6; padding: 2px 8px; border-radius: 4px;
            font-size: 0.9em; color: #d63384;
        }
        .article-content pre {
            background: #1e293b; color: #e2e8f0; padding: 20px 24px; border-radius: var(--radius-sm);
            overflow-x: auto; font-size: 0.9rem; margin: 1.5em 0;
        }
        .article-content pre code { background: transparent; color: inherit; padding: 0; }
        .article-tags { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
        .article-tags span { font-weight: 600; color: var(--text-light); font-size: 0.9rem; }
        .article-tags .tag {
            display: inline-block; padding: 4px 14px; background: var(--bg);
            border-radius: 20px; font-size: 0.85rem; color: var(--text-light);
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .article-tags .tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
        .article-sidebar { width: 320px; flex-shrink: 0; }
        .sidebar-card {
            background: var(--bg-card); border-radius: var(--radius);
            box-shadow: var(--shadow); padding: 28px; margin-bottom: 24px;
        }
        .sidebar-card h5 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
        .sidebar-list a {
            display: flex; align-items: flex-start; gap: 12px;
            padding: 10px 0; border-bottom: 1px solid var(--border);
            color: var(--text); text-decoration: none; transition: all var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { color: var(--primary); padding-left: 6px; }
        .sidebar-list a i { color: var(--secondary); margin-top: 3px; font-size: 0.85rem; }
        .sidebar-list a span { font-size: 0.92rem; line-height: 1.4; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), #1e40af);
            color: #fff; text-align: center; padding: 32px 24px;
            border-radius: var(--radius); box-shadow: var(--shadow);
        }
        .sidebar-cta h5 { color: #fff; border-bottom: none; margin-bottom: 8px; }
        .sidebar-cta p { font-size: 0.9rem; opacity: 0.85; margin-bottom: 18px; }
        .sidebar-cta .btn {
            background: var(--secondary); color: #111; border: none;
            padding: 10px 28px; font-weight: 600; border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .sidebar-cta .btn:hover { background: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }

        /* ===== Related Posts ===== */
        .related-section { padding: 50px 0 30px; background: var(--bg); }
        .related-section .section-title { font-size: 1.8rem; font-weight: 700; text-align: center; margin-bottom: 40px; }
        .related-section .section-title span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .related-card {
            background: var(--bg-card); border-radius: var(--radius);
            box-shadow: var(--shadow); overflow: hidden; transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            width: 100%; height: 200px; object-fit: cover;
            border-bottom: 3px solid var(--primary-light);
        }
        .related-card .card-body { padding: 20px 24px 24px; }
        .related-card .card-body .badge { background: var(--primary-light); color: var(--primary); font-weight: 600; font-size: 0.75rem; padding: 3px 12px; border-radius: 20px; margin-bottom: 10px; }
        .related-card .card-body h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h4 a { color: var(--text); text-decoration: none; transition: color var(--transition); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-body .date { font-size: 0.82rem; color: var(--text-light); }
        .related-card .card-body .date i { margin-right: 4px; }

        /* ===== FAQ ===== */
        .faq-section { padding: 50px 0; background: var(--bg-white); }
        .faq-section .section-title { font-size: 1.8rem; font-weight: 700; text-align: center; margin-bottom: 12px; }
        .faq-section .section-sub { text-align: center; color: var(--text-light); margin-bottom: 40px; font-size: 1.05rem; }
        .faq-grid { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card); border: 1px solid var(--border);
            border-radius: var(--radius); margin-bottom: 16px;
            overflow: hidden; transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow); }
        .faq-question {
            padding: 18px 24px; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
            font-weight: 600; font-size: 1rem; color: var(--text);
            background: none; border: none; width: 100%; text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: #f9fafb; }
        .faq-question i { color: var(--primary); font-size: 1.1rem; transition: transform 0.3s; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer { padding: 0 24px 18px; color: var(--text-light); font-size: 0.95rem; line-height: 1.7; display: none; }
        .faq-item.active .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0; background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative; color: var(--text-white); text-align: center;
        }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(17,24,39,0.8) 0%, rgba(13,110,253,0.5) 100%); z-index: 1; }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; opacity: 0.85; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-section .btn-cta {
            background: var(--secondary); color: #111; border: none;
            padding: 14px 40px; font-size: 1.1rem; font-weight: 700;
            border-radius: var(--radius-sm); box-shadow: 0 6px 24px rgba(245,158,11,0.35);
            transition: all var(--transition); display: inline-block;
        }
        .cta-section .btn-cta:hover { background: #fff; transform: translateY(-3px); box-shadow: 0 10px 32px rgba(245,158,11,0.5); }
        .cta-section .btn-cta i { margin-right: 8px; }

        /* ===== Error State ===== */
        .error-section { padding: 80px 0; text-align: center; }
        .error-section .error-icon { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
        .error-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
        .error-section p { color: var(--text-light); font-size: 1.1rem; margin-bottom: 28px; }
        .error-section .btn-back { background: var(--primary); color: #fff; padding: 12px 32px; border-radius: var(--radius-sm); font-weight: 600; display: inline-block; transition: all var(--transition); }
        .error-section .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.7);
            padding: 60px 0 20px; font-size: 0.92rem;
        }
        .site-footer .logo { color: #fff; margin-bottom: 16px; }
        .site-footer .logo span { background: linear-gradient(135deg, #60a5fa, var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-footer .logo i { color: #60a5fa; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand p { color: rgba(255,255,255,0.6); max-width: 320px; line-height: 1.7; }
        .footer-col h5 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 18px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.6); text-decoration: none; padding: 4px 0; transition: all var(--transition); }
        .footer-col a:hover { color: var(--secondary); padding-left: 6px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px;
            display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
        }
        .footer-bottom p { color: rgba(255,255,255,0.5); font-size: 0.85rem; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 38px; height: 38px; border-radius: 50%;
            background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.6);
            transition: all var(--transition); font-size: 1rem;
        }
        .footer-social a:hover { background: var(--secondary); color: #111; transform: scale(1.1); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-banner h1 { font-size: 2.1rem; }
            .article-wrapper { flex-direction: column; }
            .article-sidebar { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .sidebar-card { margin-bottom: 0; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-links { display: none; position: absolute; top: var(--header-height); left: 0; right: 0; background: var(--bg-white); flex-direction: column; padding: 16px 24px; box-shadow: 0 8px 30px rgba(0,0,0,0.1); border-bottom: 2px solid var(--border); gap: 4px; }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-links a.active::after { display: none; }
            .nav-links a.nav-cta { text-align: center; }
            .nav-toggle { display: block; }
            .article-banner { padding: 50px 0 40px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-card { padding: 24px 20px; }
            .article-content { font-size: 0.98rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section .btn-cta { padding: 12px 28px; font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.35rem; }
            .article-meta { font-size: 0.85rem; gap: 12px; }
            .article-card { padding: 16px; }
            .related-card .card-img { height: 160px; }
            .faq-question { font-size: 0.92rem; padding: 14px 16px; }
            .faq-answer { padding: 0 16px 14px; }
            .cta-section h2 { font-size: 1.25rem; }
        }