/* roulang page: index */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #EEF2FF;
            --accent: #06B6D4;
            --accent-light: #ECFEFF;
            --warning: #F59E0B;
            --dark: #0F172A;
            --dark-2: #1E293B;
            --bg: #F8FAFC;
            --white: #FFFFFF;
            --text: #1E293B;
            --text-light: #64748B;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--primary-dark);
        }

        .container {
            max-width: 1200px;
            padding: 0 24px;
        }

        .section {
            padding: 96px 0;
        }

        .section-sm {
            padding: 64px 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            color: var(--dark);
            line-height: 1.3;
        }

        .section-desc {
            font-size: 17px;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.7;
        }

        .text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            padding: 12px 28px;
            transition: var(--transition);
            border: 2px solid transparent;
            font-size: 15px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
            color: #fff;
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: #fff;
            color: var(--dark);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline-primary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
        }

        .badge-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            margin-right: 8px;
            margin-bottom: 8px;
        }

        .card {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
            background: var(--white);
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }

        .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.01em;
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            margin-right: 10px;
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }

        .navbar-nav .nav-link {
            font-weight: 500;
            color: var(--text-light);
            padding: 8px 18px !important;
            font-size: 15px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        .btn-login {
            margin-left: 16px;
            padding: 10px 24px;
            border-radius: 50px;
        }

        .navbar-toggler {
            border: none;
            outline: none;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        /* Hero */
        .hero {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 27, 75, 0.88), rgba(79, 70, 229, 0.78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 140px 0 100px;
            color: #fff;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.3), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }

        .hero h1 span {
            background: linear-gradient(90deg, #A5B4FC, #67E8F9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 19px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            line-height: 1.8;
            max-width: 580px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 60px;
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
            padding-top: 40px;
        }

        .hero-stat h3 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 4px;
            color: #fff;
        }

        .hero-stat span {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* Feature cards */
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }

        .feature-icon.i-primary {
            background: var(--primary-light);
            color: var(--primary);
        }

        .feature-icon.i-accent {
            background: var(--accent-light);
            color: var(--accent);
        }

        .feature-icon.i-warning {
            background: #FEF3C7;
            color: var(--warning);
        }

        .feature-card {
            padding: 36px 32px;
            height: 100%;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            background: var(--white);
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.2);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .feature-card p {
            color: var(--text-light);
            font-size: 15px;
            margin-bottom: 0;
        }

        /* Category cards */
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            color: #fff;
            border: none;
            box-shadow: var(--shadow-lg);
        }

        .category-card .category-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            transition: transform 0.5s ease;
        }

        .category-card:hover .category-bg {
            transform: scale(1.05);
        }

        .category-card .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(15, 23, 42, 0.92) 100%);
        }

        .category-card .category-body {
            position: relative;
            z-index: 2;
            padding: 36px;
            width: 100%;
        }

        .category-card h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .category-card p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 16px;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border-bottom: 2px solid rgba(255, 255, 255, 0.3);
            padding-bottom: 2px;
        }

        .category-link:hover {
            color: #A5B4FC;
            border-color: #A5B4FC;
        }

        /* Flow steps */
        .flow-step {
            text-align: center;
            padding: 32px 24px;
            position: relative;
        }

        .flow-step .step-number {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
            position: relative;
        }

        .flow-step .step-number::after {
            content: '';
            position: absolute;
            inset: -6px;
            border-radius: 50%;
            border: 2px dashed rgba(79, 70, 229, 0.3);
            animation: spin 20s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .flow-step h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .flow-step p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* News cards */
        .news-card {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 28px;
            height: 100%;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.2);
        }

        .news-card .tag-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .news-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .news-card h3 a {
            color: var(--dark);
        }

        .news-card h3 a:hover {
            color: var(--primary);
        }

        .news-card p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .news-meta .read-more {
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
        }

        /* Stats section */
        .stats-section {
            background: linear-gradient(135deg, var(--dark) 0%, #1E1B4B 100%);
            color: #fff;
            padding: 80px 0;
        }

        .stat-card {
            text-align: center;
            padding: 24px;
        }

        .stat-card .stat-num {
            font-size: 44px;
            font-weight: 800;
            background: linear-gradient(90deg, #A5B4FC, #67E8F9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 8px;
        }

        .stat-card .stat-icon {
            font-size: 28px;
            margin-bottom: 16px;
            color: #67E8F9;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: var(--white);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-item summary {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-item .faq-body {
            padding: 0 28px 22px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            padding: 80px 0;
            border-radius: 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.9);
            max-width: 560px;
            margin: 0 auto 36px;
        }

        .cta-btn {
            background: #fff;
            color: var(--primary);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 16px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
            display: inline-block;
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }

        .cta-btn-outline {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            display: inline-block;
            margin-left: 12px;
        }

        .cta-btn-outline:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            transform: translateY(-3px);
        }

        /* Footer */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 72px 0 32px;
        }

        .site-footer h5 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 14px;
            margin-right: 10px;
        }

        .site-footer p {
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.7);
            padding: 6px 0;
            font-size: 14px;
        }

        .footer-links a:hover {
            color: #A5B4FC;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            margin-top: 48px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* Empty state */
        .empty-state {
            text-align: center;
            padding: 60px 24px;
            background: var(--white);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
            color: var(--text-light);
        }

        .empty-state i {
            font-size: 48px;
            color: var(--border);
            display: block;
            margin-bottom: 16px;
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .hero {
                padding: 100px 0 80px;
            }

            .hero h1 {
                font-size: 42px;
            }

            .navbar-collapse {
                background: var(--white);
                border-radius: var(--radius);
                box-shadow: var(--shadow-lg);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--border);
            }

            .btn-login {
                margin-left: 0;
                margin-top: 12px;
                display: block;
                text-align: center;
            }

            .section {
                padding: 64px 0;
            }

            .section-title {
                font-size: 30px;
            }
        }

        @media (max-width: 767.98px) {
            .hero {
                padding: 80px 0 60px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero p {
                font-size: 16px;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }

            .hero-stats {
                gap: 24px;
            }

            .hero-stat h3 {
                font-size: 26px;
            }

            .category-card {
                min-height: 320px;
            }

            .stats-section {
                padding: 56px 0;
            }

            .stat-card .stat-num {
                font-size: 36px;
            }

            .faq-item summary {
                font-size: 15px;
                padding: 18px 20px;
            }

            .faq-item .faq-body {
                padding: 0 20px 18px;
            }

            .cta-section {
                padding: 56px 0;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .cta-content .btn-lg,
            .cta-btn-outline {
                width: 100%;
                margin: 8px 0;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --text: #334155;
            --text-light: #64748b;
            --bg: #f8fafc;
            --bg-alt: #f1f5f9;
            --white: #ffffff;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 12px rgba(15, 23, 42, 0.04);
        }

        .site-header .navbar {
            padding: 14px 0;
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 900;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }

        .navbar-brand:hover {
            color: var(--dark);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .navbar-nav {
            gap: 4px;
        }

        .nav-link {
            font-weight: 500;
            color: var(--text);
            padding: 8px 16px !important;
            border-radius: 8px;
            font-size: 0.95rem;
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
            background: var(--primary-light);
        }

        .btn-login {
            background: var(--primary);
            border: none;
            border-radius: 10px;
            padding: 10px 22px;
            font-weight: 600;
            font-size: 0.92rem;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
            color: #fff;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
            outline: none;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 88px 0 76px;
            background: linear-gradient(135deg, var(--dark) 0%, #1d2b4e 60%, #243a63 100%);
            color: #fff;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .page-hero .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #e2e8f0;
            margin-bottom: 20px;
        }

        .page-hero h1 {
            font-size: 2.9rem;
            font-weight: 900;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 16px;
            color: #fff;
        }

        .page-hero h1 span {
            color: #93c5fd;
        }

        .page-hero .lead {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 620px;
            margin-bottom: 30px;
            font-weight: 300;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }

        .btn-light-custom {
            background: #fff;
            color: var(--dark);
            border: none;
            border-radius: 10px;
            padding: 12px 28px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
            transition: var(--transition);
        }

        .btn-light-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
            color: var(--dark);
        }

        .btn-outline-light-custom {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            border-radius: 10px;
            padding: 12px 28px;
            font-weight: 600;
            transition: var(--transition);
        }

        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero-metrics .metric-item {
            text-align: center;
            padding: 0 16px;
        }

        .hero-metrics .metric-item:first-child {
            padding-left: 0;
        }

        .hero-metrics .metric-num {
            font-size: 1.9rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
        }

        .hero-metrics .metric-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.6);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: 20px 0;
            background: var(--white);
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            margin: 0;
            font-size: 0.88rem;
        }

        .breadcrumb-item a {
            color: var(--text-light);
        }

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

        .breadcrumb-item.active {
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== Section Spacing ===== */
        .section-pad {
            padding: 80px 0;
        }

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

        .section-head .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 2.1rem;
            font-weight: 900;
            color: var(--dark);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-light);
            font-size: 1rem;
            max-width: 640px;
            margin: 0 auto;
        }

        /* ===== Cards ===== */
        .card-solution {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .card-solution::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transition: var(--transition);
            transform-origin: left;
        }

        .card-solution:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .card-solution:hover::before {
            transform: scaleX(1);
        }

        .card-solution .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 20px;
            background: var(--primary-light);
            color: var(--primary);
        }

        .card-solution:nth-child(2) .card-icon {
            background: var(--accent-light);
            color: var(--accent);
        }

        .card-solution:nth-child(3) .card-icon {
            background: #dcfce7;
            color: #16a34a;
        }

        .card-solution:nth-child(4) .card-icon {
            background: #fae8ff;
            color: #a855f7;
        }

        .card-solution h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .card-solution p {
            color: var(--text-light);
            font-size: 0.92rem;
            margin-bottom: 16px;
        }

        .card-solution .card-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .card-solution .card-link i {
            transition: transform 0.3s;
        }

        .card-solution .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .steps-wrapper {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }

        .steps-wrapper::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-light), var(--border), var(--primary-light));
            z-index: 0;
        }

        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 8px;
        }

        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }

        .step-item:nth-child(2) .step-num {
            background: var(--accent);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
        }

        .step-item:nth-child(3) .step-num {
            background: #16a34a;
            box-shadow: 0 4px 16px rgba(22, 163, 74, 0.3);
        }

        .step-item:nth-child(4) .step-num {
            background: #a855f7;
            box-shadow: 0 4px 16px rgba(168, 85, 247, 0.3);
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== Scenarios ===== */
        .scenario-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .scenario-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
        }

        .scenario-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .scenario-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .scenario-card .card-img-wrap::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.4) 100%);
        }

        .scenario-card .img-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(4px);
            border-radius: 50px;
            padding: 4px 14px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--dark);
        }

        .scenario-card .card-body {
            padding: 24px;
        }

        .scenario-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .scenario-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 12px;
        }

        .scenario-card .meta-info {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-light);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        /* ===== Statistics ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--dark) 0%, #1d2b4e 100%);
            color: #fff;
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }

        .stats-section .container {
            position: relative;
            z-index: 1;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .stat-item {
            text-align: center;
            padding: 24px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius);
            backdrop-filter: blur(4px);
        }

        .stat-item .stat-num {
            font-size: 2.4rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-item .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }

        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 14px;
            background: var(--white);
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.03);
            overflow: hidden;
        }

        .accordion-button {
            padding: 18px 22px;
            font-weight: 600;
            color: var(--dark);
            background: var(--white);
            font-size: 0.95rem;
            border: none;
            box-shadow: none;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--primary-light);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            border: none;
        }

        .accordion-button::after {
            background-size: 12px;
        }

        .accordion-body {
            padding: 18px 22px;
            color: var(--text);
            font-size: 0.92rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 70px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 900;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 660px;
            margin: 0 auto 30px;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            border: none;
            border-radius: 10px;
            padding: 14px 36px;
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }

        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }

        .btn-ghost-white {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-radius: 10px;
            padding: 14px 36px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            margin-left: 12px;
        }

        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 30px;
        }

        .footer-brand {
            font-size: 1.4rem;
            font-weight: 900;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: #fff;
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
        }

        .site-footer p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
        }

        .site-footer h5 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 50px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            margin: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .steps-wrapper {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px;
            }

            .steps-wrapper::before {
                display: none;
            }

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

            .page-hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 60px 0 50px;
            }

            .page-hero h1 {
                font-size: 1.9rem;
            }

            .page-hero .lead {
                font-size: 1rem;
            }

            .section-pad {
                padding: 60px 0;
            }

            .section-head h2 {
                font-size: 1.7rem;
            }

            .navbar-collapse {
                padding: 16px 0;
            }

            .navbar-nav {
                gap: 2px;
            }

            .nav-link {
                padding: 10px 14px !important;
            }

            .btn-login {
                margin-top: 12px;
                width: 100%;
                justify-content: center;
            }

            .steps-wrapper {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .step-item {
                text-align: left;
                display: flex;
                align-items: flex-start;
                gap: 18px;
                padding: 0;
            }

            .step-num {
                margin: 0;
                flex-shrink: 0;
            }

            .step-item h3 {
                margin-bottom: 4px;
            }

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

            .stat-item {
                padding: 18px 12px;
            }

            .stat-item .stat-num {
                font-size: 1.9rem;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .btn-ghost-white {
                margin-left: 0;
                margin-top: 10px;
            }

            .hero-metrics {
                gap: 20px;
            }

            .hero-metrics .metric-item {
                padding: 0 8px;
            }

            .hero-metrics .metric-num {
                font-size: 1.5rem;
            }
        }

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

            .page-hero h1 {
                font-size: 1.7rem;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .stat-item {
                padding: 20px;
            }

            .hero-metrics {
                gap: 14px;
                justify-content: space-between;
            }

            .hero-metrics .metric-item {
                padding: 0;
                text-align: left;
            }

            .hero-metrics .metric-num {
                font-size: 1.3rem;
            }

            .hero-metrics .metric-label {
                font-size: 0.72rem;
            }

            .site-footer {
                padding: 50px 0 24px;
            }

            .footer-bottom {
                margin-top: 30px;
            }

            .scenario-card .card-body {
                padding: 18px;
            }
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --dark: #0f172a;
            --dark-soft: #1e293b;
            --body-bg: #f8fafc;
            --white: #ffffff;
            --text: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 1rem;
            --radius-sm: 0.6rem;
            --shadow-sm: 0 4px 14px rgba(15, 23, 42, 0.06);
            --shadow: 0 12px 32px rgba(15, 23, 42, 0.10);
            --shadow-lg: 0 20px 48px rgba(37, 99, 235, 0.18);
            --transition: all 0.25s ease;
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans", "Segoe UI", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--body-bg);
            color: var(--text);
            line-height: 1.75;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            max-width: 1240px;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.75);
            transition: box-shadow 0.3s ease;
        }

        .site-header .navbar {
            padding: 0.9rem 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.38rem;
            font-weight: 800;
            color: var(--dark) !important;
            letter-spacing: 0.02em;
        }

        .navbar-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), #60a5fa);
            border-radius: 12px;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 6px 18px rgba(37, 99, 235, 0.3);
        }

        .navbar-nav .nav-link {
            font-weight: 600;
            color: var(--text-muted);
            padding: 0.55rem 1rem;
            border-radius: 0.75rem;
            margin: 0 0.2rem;
            transition: var(--transition);
            font-size: 0.98rem;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }

        .navbar-toggler {
            border: 2px solid var(--border);
            border-radius: 0.75rem;
            padding: 0.4rem 0.7rem;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 0.25rem rgba(37, 99, 235, 0.15);
        }

        .btn-login {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: none;
            padding: 0.65rem 1.5rem;
            font-weight: 700;
            border-radius: 0.85rem;
            color: #fff !important;
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(37, 99, 235, 0.4);
        }

        .btn-login:active {
            transform: translateY(0);
        }

        .btn-login:focus-visible,
        .nav-link:focus-visible,
        .navbar-toggler:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }

        .page-hero {
            position: relative;
            background: linear-gradient(100deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.72) 45%, rgba(15, 23, 42, 0.55) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            padding: 6.5rem 0 5.5rem;
        }

        .page-hero .hero-category {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 0.4rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            backdrop-filter: blur(6px);
            margin-bottom: 1.5rem;
        }

        .page-hero h1 {
            font-size: clamp(1.8rem, 4vw, 3.1rem);
            font-weight: 800;
            line-height: 1.3;
            max-width: 860px;
            margin-bottom: 1.2rem;
            letter-spacing: -0.01em;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .hero-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-section {
            padding: 3.5rem 0 4rem;
        }

        .breadcrumb-wrap {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 0.7rem 1rem;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .breadcrumb-wrap a {
            color: var(--primary);
            font-weight: 500;
        }

        .breadcrumb-wrap a:hover {
            text-decoration: underline;
        }

        .article-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .article-card .card-header-glow {
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .article-card .article-body {
            padding: 2rem 2.5rem 2.5rem;
        }

        .article-body {
            font-size: 1.02rem;
            line-height: 1.9;
            color: var(--text);
            word-break: break-word;
        }

        .article-body h2,
        .article-body h3,
        .article-body h4 {
            color: var(--dark);
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            line-height: 1.45;
        }

        .article-body h2 {
            font-size: 1.6rem;
            padding-left: 0.85rem;
            border-left: 4px solid var(--primary);
        }

        .article-body h3 {
            font-size: 1.3rem;
        }

        .article-body p {
            margin-bottom: 1.2rem;
        }

        .article-body img {
            border-radius: var(--radius);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }

        .article-body ul,
        .article-body ol {
            margin: 1.2rem 0;
            padding-left: 1.4rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body blockquote {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            padding: 1.2rem 1.5rem;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            color: var(--dark-soft);
            font-style: normal;
            font-weight: 500;
        }

        .article-body a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            padding: 1.5rem 2.5rem 2rem;
            border-top: 1px solid var(--border);
            margin-top: 0;
        }

        .article-tags .tag-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--body-bg);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 0.85rem;
            padding: 0.35rem 0.9rem;
            border-radius: 2rem;
            transition: var(--transition);
            font-weight: 500;
        }

        .tag:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        .article-tools {
            padding: 0 2.5rem 2.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .share-action {
            display: flex;
            gap: 0.6rem;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--body-bg);
            border: 1px solid var(--border);
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 1rem;
        }

        .share-btn:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .sidebar-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
        }

        .sidebar-card h5 {
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
        }

        .sidebar-card h5 i {
            color: var(--primary);
        }

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

        .side-list li {
            padding: 0.6rem 0;
            border-bottom: 1px dashed var(--border);
            font-size: 0.9rem;
        }

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

        .side-list a {
            color: var(--text);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            line-height: 1.5;
        }

        .side-list a:hover {
            color: var(--primary);
        }

        .side-list .list-dot {
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            flex: 0 0 auto;
        }

        .side-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
        }

        .not-found {
            text-align: center;
            padding: 5rem 2rem;
        }

        .not-found i {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
        }

        .not-found h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 0.8rem;
        }

        .not-found p {
            color: var(--text-muted);
            margin-bottom: 2rem;
        }

        .related-section {
            background: var(--white);
            border-top: 1px solid var(--border);
            padding: 4rem 0;
        }

        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 2.2rem;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 0;
            letter-spacing: -0.01em;
        }

        .section-header .sub {
            color: var(--text-muted);
            margin-top: 0.4rem;
            font-size: 0.95rem;
        }

        .related-card {
            background: var(--body-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(37, 99, 235, 0.3);
        }

        .related-card .card-img-wrap {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
            background: var(--primary-light);
        }

        .related-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .related-card .card-img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.15), transparent 60%);
        }

        .related-card .card-body {
            padding: 1.4rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card .card-cat {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 0.5rem;
        }

        .related-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 0.8rem;
        }

        .related-card h3 a {
            color: var(--dark);
        }

        .related-card h3 a:hover {
            color: var(--primary);
        }

        .related-card .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 1rem;
        }

        .related-card .card-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            gap: 1rem;
        }

        .related-card .card-meta i {
            color: var(--primary);
        }

        .cta-section {
            position: relative;
            background: linear-gradient(120deg, #0f172a 0%, #1e3a8a 100%);
            border-radius: 1.5rem;
            overflow: hidden;
            padding: 4rem 3rem;
            margin: 4rem 0 0;
            text-align: center;
            color: #fff;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.18;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .cta-section .btn-white {
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: 2rem;
            border: none;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }

        .cta-section .btn-white:hover {
            transform: translateY(-3px);
            background: var(--accent);
            color: var(--dark);
        }

        .site-footer {
            background: #0b1120;
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 0;
            margin-top: 4rem;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
        }

        .site-footer .footer-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), #60a5fa);
            border-radius: 12px;
            color: #fff;
        }

        .site-footer h5 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 1.2rem;
            font-size: 1rem;
        }

        .site-footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }

        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }

        .site-footer .footer-bottom {
            margin-top: 3rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 1.3rem 0;
            text-align: center;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                padding: 1rem 0 0.5rem;
            }

            .navbar-nav .nav-link {
                padding: 0.65rem 0.9rem;
                margin-bottom: 0.2rem;
            }

            .btn-login {
                margin-top: 0.8rem;
                width: 100%;
                text-align: center;
            }

            .page-hero {
                padding: 4rem 0 3.5rem;
            }

            .article-card .article-body {
                padding: 1.5rem;
            }

            .article-tags,
            .article-tools {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }

            .cta-section {
                padding: 3rem 1.5rem;
            }
        }

        @media (max-width: 767px) {
            .page-hero h1 {
                font-size: 1.7rem;
            }

            .hero-meta {
                gap: 0.8rem;
                font-size: 0.85rem;
            }

            .article-section {
                padding: 2.5rem 0 3rem;
            }

            .breadcrumb-wrap {
                margin-bottom: 1.5rem;
            }

            .article-card .article-body {
                font-size: 0.96rem;
                line-height: 1.85;
            }

            .article-body h2 {
                font-size: 1.35rem;
            }

            .section-header h2 {
                font-size: 1.6rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .site-footer {
                padding-top: 3rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }

            .navbar-brand {
                font-size: 1.15rem;
            }

            .navbar-brand .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
            }

            .page-hero {
                padding: 3.2rem 0 2.8rem;
            }

            .page-hero h1 {
                font-size: 1.45rem;
                line-height: 1.4;
            }

            .hero-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.4rem;
            }

            .article-card .article-body {
                padding: 1.2rem;
            }

            .article-tags,
            .article-tools {
                padding-left: 1.2rem;
                padding-right: 1.2rem;
            }

            .related-card h3 {
                font-size: 1rem;
            }

            .cta-section {
                padding: 2.5rem 1.2rem;
                border-radius: 1rem;
                margin-top: 3rem;
            }

            .cta-section h2 {
                font-size: 1.3rem;
            }

            .btn-login {
                padding: 0.6rem 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0f2d4a;
            --primary-deep: #081e33;
            --primary-light: #1a4b72;
            --accent: #00b8a9;
            --accent-strong: #009b8e;
            --hot: #ff7a3d;
            --bg: #f2f5f9;
            --surface: #ffffff;
            --text: #172f45;
            --text-secondary: #64748b;
            --border: #e2e8f0;
            --radius-xl: 24px;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-xs: 0 2px 6px rgba(15, 45, 74, 0.05);
            --shadow-sm: 0 6px 18px rgba(15, 45, 74, 0.07);
            --shadow-md: 0 14px 36px rgba(15, 45, 74, 0.10);
            --shadow-lg: 0 24px 60px rgba(15, 45, 74, 0.14);
            --gradient-main: linear-gradient(135deg, #081e33 0%, #163d63 100%);
            --gradient-accent: linear-gradient(135deg, #00b8a9 0%, #009b8e 100%);
            --font-base: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        body {
            margin: 0;
            font-family: var(--font-base);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }

        p {
            margin: 0;
        }

        .container {
            max-width: 1200px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 4px 20px rgba(15, 45, 74, 0.04);
        }

        .navbar {
            padding: 12px 0;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.35rem;
            color: var(--primary) !important;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--gradient-main);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            box-shadow: 0 6px 16px rgba(15, 45, 74, 0.25);
            flex-shrink: 0;
        }

        .navbar-nav .nav-link {
            font-weight: 600;
            color: var(--text);
            padding: 8px 18px !important;
            border-radius: 999px;
            margin: 0 3px;
            font-size: 15px;
            transition: all 0.3s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--accent-strong);
            background: rgba(0, 184, 169, 0.08);
        }

        .navbar-nav .nav-link.active {
            color: #fff;
            background: var(--gradient-accent);
            box-shadow: 0 4px 14px rgba(0, 184, 169, 0.35);
        }

        .btn-login {
            background: var(--gradient-main) !important;
            color: #fff !important;
            border: none !important;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            box-shadow: 0 4px 12px rgba(15, 45, 74, 0.18);
            transition: all 0.3s ease;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(15, 45, 74, 0.28);
            color: #fff !important;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2815, 45, 74, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .category-hero {
            position: relative;
            background: linear-gradient(115deg, rgba(8, 30, 51, 0.94) 0%, rgba(15, 45, 74, 0.78) 100%),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            padding: 110px 0 90px;
            margin-bottom: 0;
        }

        .category-hero .hero-eyebrow {
            display: inline-block;
            background: rgba(0, 184, 169, 0.2);
            border: 1px solid rgba(0, 184, 169, 0.35);
            color: #6ff0e3;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 18px;
        }

        .category-hero h1 {
            color: #fff;
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.25;
            margin-bottom: 18px;
            max-width: 760px;
        }

        .category-hero .hero-desc {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 640px;
            margin-bottom: 36px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn-hero-primary {
            background: var(--gradient-accent);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: 999px;
            border: none;
            box-shadow: 0 6px 20px rgba(0, 184, 169, 0.35);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-hero-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 184, 169, 0.45);
            color: #fff;
        }

        .btn-hero-outline {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(6px);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-hero-outline:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .section {
            padding: 90px 0;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }

        .section-eyebrow {
            display: inline-block;
            font-weight: 700;
            font-size: 13px;
            letter-spacing: 2px;
            color: var(--accent-strong);
            text-transform: uppercase;
            background: rgba(0, 184, 169, 0.1);
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 34px 30px;
            height: 100%;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-xs);
            transition: all 0.35s ease;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 184, 169, 0.3);
        }

        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 22px;
            background: linear-gradient(135deg, rgba(0, 184, 169, 0.15), rgba(0, 184, 169, 0.05));
            color: var(--accent-strong);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .feature-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
        }

        .topic-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            max-width: 860px;
            margin: 0 auto;
        }

        .topic-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 11px 22px;
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
            box-shadow: var(--shadow-xs);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .topic-chip i {
            color: var(--accent-strong);
            font-size: 13px;
        }

        .topic-chip:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .topic-chip:hover i {
            color: #6ff0e3;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-xs);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .article-cover {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: #e8edf3;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .article-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--hot);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 999px;
            box-shadow: 0 4px 12px rgba(255, 122, 61, 0.4);
            z-index: 2;
        }

        .article-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-body h3 {
            font-size: 1.02rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text);
            margin-bottom: 12px;
            flex: 1;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--text-secondary);
            font-size: 13px;
            margin-top: 10px;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .article-meta .read-link {
            color: var(--accent-strong);
            font-weight: 600;
        }

        .flow-wrap {
            background: var(--surface);
            border-radius: var(--radius-xl);
            padding: 54px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            position: relative;
        }

        .flow-item {
            position: relative;
            padding-left: 88px;
        }

        .flow-item::before {
            content: '';
            position: absolute;
            left: 30px;
            top: 72px;
            bottom: -36px;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent), rgba(0, 184, 169, 0.1));
        }

        .flow-item:last-child::before {
            display: none;
        }

        .flow-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--gradient-main);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            box-shadow: 0 8px 20px rgba(15, 45, 74, 0.25);
        }

        .flow-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .flow-item p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
            max-width: 560px;
        }

        .rank-panel {
            background: var(--surface);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 30px 28px;
            height: 100%;
        }

        .rank-panel h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .rank-panel .rank-sub {
            color: var(--text-secondary);
            font-size: 13px;
            margin-bottom: 18px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 15px 10px;
            border-bottom: 1px solid var(--border);
            transition: all 0.3s ease;
            border-radius: 12px;
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-item:hover {
            background: rgba(0, 184, 169, 0.04);
            padding-left: 16px;
        }

        .rank-number {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(15, 45, 74, 0.06);
            color: var(--primary);
            font-weight: 800;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .rank-item:nth-child(1) .rank-number {
            background: linear-gradient(135deg, #ff7a3d, #ff9a5c);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 122, 61, 0.35);
        }

        .rank-item:nth-child(2) .rank-number {
            background: linear-gradient(135deg, #ffb03d, #ffca6a);
            color: #fff;
        }

        .rank-item:nth-child(3) .rank-number {
            background: linear-gradient(135deg, #00b8a9, #4dd4c8);
            color: #fff;
        }

        .rank-title {
            flex: 1;
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
            line-height: 1.5;
        }

        .rank-heat {
            color: var(--text-secondary);
            font-size: 13px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .rank-heat i {
            color: var(--hot);
            font-size: 12px;
        }

        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--surface);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            transition: all 0.3s ease;
        }

        .accordion-item:hover {
            border-color: rgba(0, 184, 169, 0.35) !important;
            box-shadow: var(--shadow-sm);
        }

        .accordion-button {
            background: transparent;
            color: var(--text);
            font-weight: 600;
            font-size: 15px;
            padding: 20px 24px;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(0, 184, 169, 0.05);
            color: var(--accent-strong);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
        }

        .accordion-button::after {
            background-size: 16px;
        }

        .accordion-body {
            padding: 4px 24px 22px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .cta-section {
            background: linear-gradient(115deg, rgba(8, 30, 51, 0.94) 0%, rgba(15, 45, 74, 0.82) 100%),
                url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            border-radius: var(--radius-xl);
            padding: 74px 64px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            margin-bottom: 32px;
            max-width: 560px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .site-footer {
            background: var(--primary-deep);
            color: rgba(255, 255, 255, 0.85);
            padding: 72px 0 0;
            margin-top: 0;
        }

        .site-footer .footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            background: var(--gradient-accent);
            width: 38px;
            height: 38px;
            font-size: 0.9rem;
        }

        .site-footer p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .site-footer h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            transition: all 0.3s ease;
        }

        .footer-links a:hover {
            color: #6ff0e3;
            padding-left: 4px;
        }

        .footer-links a i {
            width: 20px;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 54px;
            padding: 24px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin: 0;
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: #fff;
                padding: 20px;
                border-radius: 16px;
                box-shadow: var(--shadow-lg);
                margin-top: 14px;
                border: 1px solid var(--border);
            }

            .navbar-nav .nav-link {
                padding: 12px 16px !important;
                width: fit-content;
            }

            .navbar .d-flex {
                margin-top: 16px;
            }

            .category-hero {
                padding: 80px 0 64px;
            }

            .category-hero h1 {
                font-size: 2.4rem;
            }

            .section {
                padding: 70px 0;
            }

            .flow-wrap {
                padding: 40px 32px;
            }
        }

        @media (max-width: 768px) {
            .category-hero h1 {
                font-size: 2rem;
            }

            .category-hero .hero-desc {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.7rem;
            }

            .section {
                padding: 56px 0;
            }

            .flow-wrap {
                padding: 30px 22px;
            }

            .flow-item {
                padding-left: 0;
                padding-top: 78px;
            }

            .flow-item::before {
                left: 30px;
                top: 0;
                bottom: auto;
                width: 2px;
                height: 70px;
            }

            .flow-item:last-child::before {
                display: none;
            }

            .flow-number {
                left: 0;
                top: 0;
            }

            .cta-section {
                padding: 46px 28px;
            }

            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 60px 0 48px;
            }

            .category-hero h1 {
                font-size: 1.7rem;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-hero-primary,
            .btn-hero-outline {
                text-align: center;
                justify-content: center;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .section-subtitle {
                font-size: 0.95rem;
            }

            .feature-card {
                padding: 26px 22px;
            }

            .rank-item {
                flex-wrap: wrap;
                gap: 10px;
            }

            .rank-title {
                flex: 1 1 100%;
                order: 1;
            }

            .rank-heat {
                order: 2;
            }

            .rank-number {
                order: 0;
            }

            .cta-actions {
                flex-direction: column;
            }
        }