/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a1e3d;
            --primary-light: #1a3a6a;
            --primary-dark: #070f1e;
            --secondary: #c9a84c;
            --secondary-light: #e8d48b;
            --secondary-dark: #a8882e;
            --bg: #f5f6fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #6c7a8d;
            --text-white: #f0f2f5;
            --border: #e2e6ee;
            --border-light: #f0f2f6;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --spacer: 80px;
            --spacer-sm: 48px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--secondary);
        }

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

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

        button:focus-visible,
        input:focus-visible,
        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== 导航 ===== */
        .navbar-custom {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            padding: 0;
            transition: box-shadow var(--transition);
        }

        .navbar-custom.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
        }

        .navbar-custom .navbar-brand {
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary);
            letter-spacing: -0.01em;
            padding: 16px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .navbar-custom .navbar-brand i {
            color: var(--secondary);
            font-size: 1.6rem;
        }

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

        .navbar-custom .nav-link {
            color: var(--text);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 20px 18px !important;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .navbar-custom .nav-link::after {
            content: '';
            position: absolute;
            bottom: 12px;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--secondary);
            border-radius: 3px;
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: var(--primary);
        }

        .navbar-custom .nav-link:hover::after,
        .navbar-custom .nav-link.active::after {
            transform: scaleX(1);
        }

        .navbar-custom .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
            margin-left: 12px;
        }

        .navbar-custom .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: #fff !important;
        }

        .navbar-custom .nav-cta::after {
            display: none;
        }

        .navbar-custom .navbar-toggler {
            border: none;
            padding: 8px 12px;
            font-size: 1.4rem;
            color: var(--primary);
        }

        .navbar-custom .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--secondary);
        }

        @media (max-width: 991.98px) {
            .navbar-custom .navbar-nav {
                padding: 16px 0;
                border-top: 1px solid var(--border);
            }

            .navbar-custom .nav-link {
                padding: 12px 0 !important;
            }

            .navbar-custom .nav-link::after {
                bottom: 4px;
                left: 0;
                right: 0;
            }

            .navbar-custom .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            padding: 100px 0 80px;
            background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 60%, #1f4a7a 100%);
            position: relative;
            overflow: hidden;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(201, 168, 76, 0.12) 0%, transparent 70%),
                radial-gradient(ellipse at 80% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-section .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 6px 18px;
            border-radius: 50px;
            color: var(--secondary-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
        }

        .hero-section .hero-badge i {
            font-size: 0.75rem;
        }

        .hero-section h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .hero-section h1 .highlight {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-section .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-section .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .hero-section .btn-primary-custom {
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 4px 16px rgba(201, 168, 76, 0.35);
        }

        .hero-section .btn-primary-custom:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(201, 168, 76, 0.45);
            color: var(--primary-dark);
        }

        .hero-section .btn-outline-custom {
            background: transparent;
            color: #fff;
            padding: 13px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .hero-section .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-3px);
            color: #fff;
        }

        .hero-section .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .hero-section .hero-stats .stat-item {
            color: #fff;
        }

        .hero-section .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary-light);
            display: block;
            line-height: 1.2;
        }

        .hero-section .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        .hero-section .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-section .hero-visual .card-mock {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            width: 100%;
            max-width: 420px;
            color: #fff;
        }

        .hero-section .hero-visual .card-mock .mock-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-section .hero-visual .card-mock .mock-dots {
            display: flex;
            gap: 6px;
        }

        .hero-section .hero-visual .card-mock .mock-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.15);
        }

        .hero-section .hero-visual .card-mock .mock-dots span:first-child {
            background: #ff6b6b;
        }
        .hero-section .hero-visual .card-mock .mock-dots span:nth-child(2) {
            background: #ffd93d;
        }
        .hero-section .hero-visual .card-mock .mock-dots span:nth-child(3) {
            background: #6bcb77;
        }

        .hero-section .hero-visual .card-mock .mock-field {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            margin-bottom: 12px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
        }

        .hero-section .hero-visual .card-mock .mock-field.active {
            border-color: var(--secondary);
            color: #fff;
        }

        .hero-section .hero-visual .card-mock .mock-btn {
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 12px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            text-align: center;
            margin-top: 16px;
            font-size: 0.95rem;
        }

        @media (max-width: 991.98px) {
            .hero-section {
                padding: 80px 0 60px;
                min-height: auto;
                text-align: center;
            }

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

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

            .hero-section .hero-actions {
                justify-content: center;
            }

            .hero-section .hero-stats {
                justify-content: center;
                gap: 24px;
            }

            .hero-section .hero-visual {
                margin-top: 40px;
            }

            .hero-section .hero-visual .card-mock {
                max-width: 100%;
            }
        }

        @media (max-width: 576px) {
            .hero-section h1 {
                font-size: 1.8rem;
            }

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

            .hero-section .hero-stats .stat-number {
                font-size: 1.4rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section-padding {
            padding: var(--spacer) 0;
        }

        .section-padding-sm {
            padding: var(--spacer-sm) 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 600px;
            line-height: 1.7;
        }

        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin-top: 16px;
            margin-bottom: 24px;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.7rem;
            }

            .section-padding {
                padding: 48px 0;
            }
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
            height: 100%;
        }

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

        .card-custom .card-icon {
            font-size: 2.2rem;
            color: var(--secondary);
            margin-bottom: 16px;
        }

        .card-custom .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .card-custom .card-text {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .card-custom .card-tag {
            display: inline-block;
            background: rgba(201, 168, 76, 0.12);
            color: var(--secondary-dark);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== 分类卡片 ===== */
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--secondary), var(--secondary-light));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

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

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

        .category-card .cat-icon {
            width: 56px;
            height: 56px;
            background: rgba(201, 168, 76, 0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--secondary);
            margin-bottom: 18px;
            transition: background var(--transition);
        }

        .category-card:hover .cat-icon {
            background: var(--secondary);
            color: #fff;
        }

        .category-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .category-card p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }

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

        .category-card .cat-link i {
            font-size: 0.75rem;
            transition: transform var(--transition);
        }

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

        /* ===== 资讯列表 ===== */
        .news-list .news-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: all var(--transition);
            margin-bottom: 12px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
        }

        .news-list .news-item:hover {
            border-color: var(--secondary);
            box-shadow: 0 4px 16px rgba(201, 168, 76, 0.08);
            transform: translateX(4px);
        }

        .news-list .news-item .news-category {
            display: inline-block;
            background: rgba(201, 168, 76, 0.1);
            color: var(--secondary-dark);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            flex-shrink: 0;
        }

        .news-list .news-item .news-title {
            flex: 1;
            min-width: 200px;
            font-weight: 600;
            color: var(--text);
            font-size: 1rem;
            transition: color var(--transition);
        }

        .news-list .news-item .news-title:hover {
            color: var(--primary-light);
        }

        .news-list .news-item .news-date {
            color: var(--text-light);
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .news-list .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border: 1px dashed var(--border);
            border-radius: var(--radius);
        }

        @media (max-width: 576px) {
            .news-list .news-item {
                padding: 16px;
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .news-list .news-item .news-title {
                min-width: auto;
            }
        }

        /* ===== 流程步骤 ===== */
        .step-item {
            text-align: center;
            padding: 24px 16px;
            position: relative;
        }

        .step-item .step-number {
            width: 52px;
            height: 52px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px rgba(10, 30, 61, 0.2);
        }

        .step-item .step-icon {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .step-item p {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        .step-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--border);
            font-size: 1.5rem;
        }

        @media (max-width: 767.98px) {
            .step-connector {
                transform: rotate(90deg);
                padding: 8px 0;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: var(--primary);
            color: #fff;
            padding: 60px 0;
        }

        .stats-section .stat-item {
            text-align: center;
            padding: 16px;
        }

        .stats-section .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--secondary-light);
            display: block;
            line-height: 1.2;
        }

        .stats-section .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        .stats-section .stat-icon {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-bottom: 8px;
            opacity: 0.8;
        }

        @media (max-width: 768px) {
            .stats-section .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            overflow: hidden;
            transition: border-color var(--transition);
        }

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

        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
            transition: color var(--transition);
        }

        .faq-item .faq-question:hover {
            color: var(--primary-light);
        }

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

        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(145deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(201, 168, 76, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 540px;
            margin: 0 auto 28px;
        }

        .cta-section .btn-cta {
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 16px 44px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
            box-shadow: 0 6px 24px rgba(201, 168, 76, 0.35);
        }

        .cta-section .btn-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-4px);
            box-shadow: 0 12px 36px rgba(201, 168, 76, 0.45);
            color: var(--primary-dark);
        }

        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.6rem;
            }

            .cta-section p {
                font-size: 1rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer-custom {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
        }

        .footer-custom .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-custom .footer-brand i {
            color: var(--secondary);
        }

        .footer-custom .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-custom .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-custom .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-custom .footer-links a:hover {
            color: var(--secondary-light);
        }

        .footer-custom .footer-links a i {
            font-size: 0.7rem;
            color: var(--secondary);
        }

        .footer-custom .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin: 32px 0 20px;
        }

        .footer-custom .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-custom .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-custom .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        @media (max-width: 768px) {
            .footer-custom {
                padding: 32px 0 24px;
            }

            .footer-custom .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 背景与装饰 ===== */
        .bg-soft {
            background: var(--bg);
        }

        .bg-white-custom {
            background: var(--bg-white);
        }

        .border-section {
            border-top: 1px solid var(--border);
        }

        /* ===== 按钮通用 ===== */
        .btn-outline-primary-custom {
            background: transparent;
            color: var(--primary);
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            border: 2px solid var(--primary);
            transition: all var(--transition);
        }

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

        /* ===== 响应式微调 ===== */
        @media (max-width: 576px) {
            .container-custom {
                padding: 0 12px;
            }

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

            .hero-section .hero-actions .btn {
                text-align: center;
                justify-content: center;
            }
        }

        /* ===== 滚动入场动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 分隔线装饰 ===== */
        .section-divider-center {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 16px auto 24px;
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #0b5e8a;
            --primary-dark: #07446a;
            --primary-light: #e6f3fc;
            --accent: #f0b429;
            --accent-hover: #dba122;
            --bg-body: #f4f7fb;
            --bg-white: #ffffff;
            --text-dark: #1a2a3a;
            --text-muted: #5e6f7e;
            --text-light: #8a9aa8;
            --border-light: #e2eaf2;
            --shadow-sm: 0 2px 8px rgba(11, 94, 138, 0.06);
            --shadow-md: 0 6px 24px rgba(11, 94, 138, 0.10);
            --shadow-lg: 0 12px 40px rgba(11, 94, 138, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s ease;
        }
        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.7;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 576px) {
            .container-custom {
                padding: 0 16px;
            }
        }
        /* ===== 导航 ===== */
        .navbar-custom {
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            padding: 12px 0;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .navbar-custom .navbar-brand {
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.3px;
        }
        .navbar-custom .navbar-brand i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .navbar-custom .navbar-brand:hover {
            color: var(--primary-dark);
        }
        .navbar-custom .nav-link {
            color: var(--text-dark);
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
        }
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link:focus {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .navbar-custom .nav-link.active {
            background: var(--primary);
            color: #fff !important;
        }
        .navbar-custom .nav-cta {
            background: var(--accent);
            color: #1a2a3a !important;
            border-radius: var(--radius-sm);
            padding: 8px 20px !important;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-custom .nav-cta:hover {
            background: var(--accent-hover);
            color: #1a2a3a !important;
        }
        .navbar-toggler {
            border: none;
            font-size: 1.4rem;
            color: var(--primary-dark);
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(11, 94, 138, 0.2);
        }
        @media (max-width: 991.98px) {
            .navbar-custom .navbar-nav {
                padding-top: 16px;
            }
            .navbar-custom .nav-link {
                padding: 10px 12px !important;
            }
            .navbar-custom .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }
        }
        /* ===== Hero ===== */
        .hero-category {
            background: linear-gradient(135deg, #07446a 0%, #0b5e8a 50%, #1a7ab5 100%);
            color: #fff;
            padding: 80px 0 64px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -10%;
            width: 120%;
            height: 80px;
            background: var(--bg-body);
            border-radius: 50% 50% 0 0 / 100% 100% 0 0;
        }
        .hero-category .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            letter-spacing: 1px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero-category h1 {
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-category p {
            font-size: 1.15rem;
            max-width: 720px;
            margin: 0 auto 32px;
            opacity: 0.9;
            line-height: 1.8;
        }
        .hero-category .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
            margin-top: 24px;
        }
        .hero-category .hero-stats .stat-item {
            text-align: center;
        }
        .hero-category .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            display: block;
        }
        .hero-category .hero-stats .stat-label {
            font-size: 0.85rem;
            opacity: 0.75;
        }
        @media (max-width: 768px) {
            .hero-category {
                padding: 56px 0 48px;
            }
            .hero-category h1 {
                font-size: 1.8rem;
            }
            .hero-category p {
                font-size: 1rem;
            }
            .hero-category .hero-stats {
                gap: 24px;
            }
        }
        /* ===== 板块通用 ===== */
        .section-block {
            padding: 72px 0;
        }
        .section-block .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-block .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .section-block {
                padding: 48px 0;
            }
            .section-block .section-title {
                font-size: 1.5rem;
            }
        }
        /* ===== 步骤卡片 ===== */
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            text-align: center;
            height: 100%;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }
        .step-card h5 {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        /* ===== 分类入口卡片网格 ===== */
        .topic-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .topic-card .topic-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .topic-card h5 {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .topic-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            flex: 1;
            margin-bottom: 16px;
        }
        .topic-card .topic-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            align-self: flex-start;
        }
        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: default;
        }
        .faq-item .faq-question i {
            color: var(--accent);
            font-size: 1.1rem;
        }
        .faq-item .faq-answer {
            color: var(--text-muted);
            padding-left: 30px;
            margin-top: 8px;
            font-size: 0.95rem;
        }
        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #07446a, #1a7ab5);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            color: #fff;
        }
        .cta-block h3 {
            font-weight: 700;
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .cta-block p {
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-block .btn-cta {
            background: var(--accent);
            color: #1a2a3a;
            font-weight: 600;
            padding: 12px 40px;
            border-radius: 40px;
            font-size: 1.05rem;
            border: none;
            transition: background var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-block .btn-cta:hover {
            background: var(--accent-hover);
            transform: scale(1.02);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 36px 20px;
            }
            .cta-block h3 {
                font-size: 1.4rem;
            }
        }
        /* ===== 安全提示卡 ===== */
        .tip-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--accent);
            height: 100%;
        }
        .tip-card .tip-icon {
            color: var(--accent);
            font-size: 1.4rem;
            margin-bottom: 10px;
        }
        .tip-card h6 {
            font-weight: 600;
            margin-bottom: 6px;
        }
        .tip-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        /* ===== 页脚 ===== */
        .footer-custom {
            background: #0f1e2e;
            color: #c8d6e5;
            padding: 56px 0 28px;
            margin-top: 72px;
        }
        .footer-custom .footer-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-custom .footer-brand i {
            color: var(--accent);
        }
        .footer-custom .footer-desc {
            font-size: 0.92rem;
            line-height: 1.7;
            opacity: 0.75;
            max-width: 320px;
        }
        .footer-custom .footer-heading {
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            font-size: 1rem;
        }
        .footer-custom .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-custom .footer-links a {
            color: #c8d6e5;
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-custom .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-custom .footer-links a i {
            font-size: 0.7rem;
            color: var(--accent);
        }
        .footer-custom .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 32px 0 20px;
        }
        .footer-custom .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            opacity: 0.65;
        }
        .footer-custom .footer-bottom a {
            color: #c8d6e5;
        }
        .footer-custom .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .footer-custom .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* ===== 额外响应式 ===== */
        @media (max-width: 576px) {
            .hero-category h1 {
                font-size: 1.5rem;
            }
            .hero-category .hero-stats .stat-number {
                font-size: 1.4rem;
            }
            .step-card {
                padding: 24px 16px;
            }
            .cta-block h3 {
                font-size: 1.2rem;
            }
        }
        /* 面包屑 */
        .breadcrumb-custom {
            background: transparent;
            padding: 16px 0 8px;
            margin: 0;
            font-size: 0.9rem;
        }
        .breadcrumb-custom .breadcrumb-item a {
            color: var(--primary);
        }
        .breadcrumb-custom .breadcrumb-item.active {
            color: var(--text-muted);
        }
        .breadcrumb-custom .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-light);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --primary-bg: #eff6ff;
            --accent: #0ea5e9;
            --accent-light: #e0f2fe;
            --bg: #f8fafc;
            --card-bg: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

        html { scroll-behavior: smooth; }

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

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

        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        input, textarea, select { font-family: inherit; font-size: inherit; }

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

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

        /* ===== Header / Navbar ===== */
        .navbar-custom {
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            min-height: var(--header-height);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .navbar-custom .container-custom { display: flex; align-items: center; justify-content: space-between; flex-wrap: nowrap; }
        .navbar-custom .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            letter-spacing: -0.3px;
        }
        .navbar-custom .navbar-brand i { font-size: 1.5rem; color: var(--primary-light); }
        .navbar-custom .navbar-brand:hover { color: var(--primary-dark); }
        .navbar-custom .navbar-nav { gap: 4px; }
        .navbar-custom .nav-link {
            padding: 8px 16px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link:focus-visible {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .navbar-custom .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .navbar-custom .nav-link.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: 60px;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(26,86,219,0.3);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-custom .nav-link.nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(26,86,219,0.4);
            transform: translateY(-1px);
        }
        .navbar-custom .navbar-toggler {
            border: none;
            color: var(--text-primary);
            font-size: 1.4rem;
            padding: 4px 8px;
        }
        .navbar-custom .navbar-toggler:focus { box-shadow: none; outline: 2px solid var(--primary-light); }

        @media (max-width: 992px) {
            .navbar-custom .navbar-nav { gap: 0; padding: 12px 0; }
            .navbar-custom .nav-link { padding: 10px 16px; border-radius: 0; white-space: normal; }
            .navbar-custom .nav-link.nav-cta { margin-top: 8px; justify-content: center; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding: 24px 0 8px;
            background: var(--bg);
        }
        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-custom li { display: flex; align-items: center; gap: 6px; }
        .breadcrumb-custom li + li::before {
            content: '/';
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .breadcrumb-custom a { color: var(--text-secondary); }
        .breadcrumb-custom a:hover { color: var(--primary); }
        .breadcrumb-custom .active { color: var(--text-primary); font-weight: 500; }

        /* ===== Article Main ===== */
        .article-section {
            padding: 24px 0 60px;
            background: var(--bg);
        }
        .article-wrapper {
            max-width: 860px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 48px 56px;
            border: 1px solid var(--border);
        }
        .article-header {
            margin-bottom: 36px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border-light);
        }
        .article-category {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 4px 14px;
            border-radius: 60px;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { font-size: 0.85rem; color: var(--text-muted); }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body p { margin-bottom: 1.2em; }
        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            font-weight: 600;
            color: var(--text-primary);
        }
        .article-body h2 { font-size: 1.5rem; }
        .article-body h3 { font-size: 1.25rem; }
        .article-body ul, .article-body ol {
            margin-bottom: 1.2em;
            padding-left: 1.5em;
        }
        .article-body li { margin-bottom: 0.4em; }
        .article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body img { border-radius: var(--radius-sm); margin: 1.5em auto; box-shadow: var(--shadow-sm); }
        .article-body blockquote {
            border-left: 4px solid var(--primary-light);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tag {
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg);
            padding: 4px 14px;
            border-radius: 60px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .article-tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }

        /* ===== Not Found ===== */
        .not-found-box {
            max-width: 600px;
            margin: 60px auto;
            text-align: center;
            padding: 64px 32px;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .not-found-box i { font-size: 3.5rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.6rem; font-weight: 600; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-box .btn-back { display: inline-flex; align-items: center; gap: 8px; }

        /* ===== CTA Help ===== */
        .cta-help-section {
            padding: 40px 0 60px;
            background: var(--bg);
        }
        .cta-help-card {
            max-width: 860px;
            margin: 0 auto;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            color: #fff;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            box-shadow: var(--shadow-lg);
        }
        .cta-help-text h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; }
        .cta-help-text p { font-size: 0.95rem; opacity: 0.9; margin: 0; max-width: 480px; }
        .cta-help-btn {
            background: #fff;
            color: var(--primary);
            padding: 12px 32px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .cta-help-btn:hover {
            background: var(--primary-bg);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.2);
            color: var(--primary-dark);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 0 0 60px;
            background: var(--bg);
        }
        .related-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 24px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .related-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .related-card i { font-size: 1.6rem; color: var(--primary-light); }
        .related-card h4 { font-size: 1.05rem; font-weight: 600; margin: 0; }
        .related-card p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; line-height: 1.6; }
        .related-card .related-link {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: auto;
        }
        .related-card .related-link:hover { gap: 10px; }

        /* ===== Footer ===== */
        .footer-custom {
            background: #0f172a;
            color: #cbd5e1;
            padding: 60px 0 0;
        }
        .footer-custom .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-custom .footer-brand i { color: var(--primary-light); font-size: 1.5rem; }
        .footer-custom .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #94a3b8;
            max-width: 340px;
        }
        .footer-custom .footer-heading {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-custom .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-custom .footer-links a {
            color: #94a3b8;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition), transform var(--transition);
        }
        .footer-custom .footer-links a:hover { color: #fff; transform: translateX(4px); }
        .footer-custom .footer-links i { font-size: 0.7rem; color: var(--primary-light); }
        .footer-custom .footer-divider {
            border-top: 1px solid #1e293b;
            margin: 40px 0 20px;
        }
        .footer-custom .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding-bottom: 24px;
            font-size: 0.85rem;
            color: #64748b;
        }
        .footer-custom .footer-bottom a { color: #94a3b8; }
        .footer-custom .footer-bottom a:hover { color: #fff; }

        /* ===== Buttons ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(26,86,219,0.25);
        }
        .btn-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26,86,219,0.35);
        }
        .btn-custom-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: none;
        }
        .btn-custom-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(26,86,219,0.25);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-wrapper { padding: 40px 36px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .article-wrapper { padding: 28px 20px; border-radius: var(--radius); }
            .article-title { font-size: 1.6rem; }
            .article-body { font-size: 1rem; }
            .cta-help-card { padding: 28px 24px; flex-direction: column; text-align: center; }
            .cta-help-text p { max-width: 100%; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-custom .footer-brand { font-size: 1.1rem; }
            .breadcrumb-section { padding: 16px 0 4px; }
        }
        @media (max-width: 520px) {
            .article-wrapper { padding: 20px 16px; }
            .article-title { font-size: 1.35rem; }
            .article-meta { flex-direction: column; gap: 8px; align-items: flex-start; }
            .cta-help-card { padding: 24px 16px; }
            .cta-help-btn { width: 100%; justify-content: center; }
            .related-card { padding: 20px; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 20px; }
        .mb-2 { margin-bottom: 20px; }
        .gap-1 { gap: 10px; }
        .flex-wrap { flex-wrap: wrap; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-center { justify-content: center; }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b5e8a;
            --primary-light: #1a7bb5;
            --primary-dark: #08466a;
            --primary-soft: #e8f4fc;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #10b981;
            --body-bg: #f8fafc;
            --white: #ffffff;
            --text-dark: #1e293b;
            --text-mid: #475569;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            background-color: var(--body-bg);
            color: var(--text-dark);
            line-height: 1.7;
            font-size: 1rem;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: var(--primary); transition: color var(--transition); }
        a:hover { color: var(--primary-light); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; padding-left: 0; }

        /* ===== 容器 ===== */
        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-custom { padding: 0 16px; }
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: var(--white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            padding: 12px 0;
            transition: box-shadow var(--transition);
        }
        .navbar-custom .navbar-brand {
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-custom .navbar-brand i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .navbar-custom .navbar-brand:hover { color: var(--primary-dark); }
        .navbar-custom .navbar-nav .nav-link {
            color: var(--text-mid);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .navbar-custom .navbar-nav .nav-link:hover,
        .navbar-custom .navbar-nav .nav-link:focus {
            color: var(--primary);
            background: var(--primary-soft);
        }
        .navbar-custom .navbar-nav .nav-link.active {
            color: var(--primary-dark);
            background: var(--primary-soft);
            font-weight: 600;
        }
        .navbar-custom .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .navbar-custom .navbar-nav .nav-cta {
            background: var(--primary);
            color: var(--white) !important;
            padding: 8px 22px !important;
            border-radius: 50px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .navbar-custom .navbar-nav .nav-cta:hover {
            background: var(--primary-light);
            color: var(--white) !important;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .navbar-custom .navbar-toggler {
            border: none;
            color: var(--text-dark);
            font-size: 1.4rem;
            padding: 4px 8px;
        }
        .navbar-custom .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(11, 94, 138, 0.2);
        }
        @media (max-width: 991px) {
            .navbar-custom .navbar-nav .nav-link {
                padding: 10px 16px;
                border-radius: 0;
            }
            .navbar-custom .navbar-nav .nav-link.active::after { display: none; }
            .navbar-custom .navbar-nav .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .footer-custom {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 0 32px;
            margin-top: 0;
        }
        .footer-custom .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-custom .footer-brand i { color: var(--secondary); font-size: 1.6rem; }
        .footer-custom .footer-desc {
            color: #94a3b8;
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-custom .footer-heading {
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
            font-size: 1.05rem;
            letter-spacing: 0.3px;
        }
        .footer-custom .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-custom .footer-links a {
            color: #94a3b8;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .footer-custom .footer-links a i { font-size: 0.65rem; color: var(--secondary); }
        .footer-custom .footer-links a:hover {
            color: var(--white);
            transform: translateX(4px);
        }
        .footer-custom .footer-divider {
            border-top: 1px solid #1e293b;
            margin: 32px 0 20px;
        }
        .footer-custom .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: #64748b;
            gap: 12px;
        }
        .footer-custom .footer-bottom a {
            color: #94a3b8;
        }
        .footer-custom .footer-bottom a:hover { color: var(--white); }
        @media (max-width: 576px) {
            .footer-custom .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 板块通用 ===== */
        .section-padding { padding: 72px 0; }
        .section-title {
            font-weight: 700;
            font-size: 2rem;
            color: var(--text-dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-mid);
            max-width: 640px;
            margin: 0 auto 40px;
            text-align: center;
        }
        .section-divider {
            width: 64px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 0 auto 16px;
        }
        @media (max-width: 768px) {
            .section-padding { padding: 52px 0; }
            .section-title { font-size: 1.6rem; }
        }

        /* ===== Hero ===== */
        .hero-platform {
            background: linear-gradient(135deg, #0b5e8a 0%, #0a4b6e 50%, #06344f 100%);
            color: var(--white);
            padding: 80px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .hero-platform::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245,158,11,0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-platform .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(4px);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: #fcd34d;
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.10);
        }
        .hero-platform .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .hero-platform .hero-title span { color: var(--secondary); }
        .hero-platform .hero-desc {
            font-size: 1.1rem;
            color: #cbd5e1;
            max-width: 540px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-platform .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-platform .btn-hero-primary {
            background: var(--secondary);
            color: #0f172a;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
            border: none;
        }
        .hero-platform .btn-hero-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(245,158,11,0.35);
            color: #0f172a;
        }
        .hero-platform .btn-hero-secondary {
            background: rgba(255,255,255,0.10);
            backdrop-filter: blur(4px);
            color: var(--white);
            font-weight: 600;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255,255,255,0.20);
            transition: all var(--transition);
        }
        .hero-platform .btn-hero-secondary:hover {
            background: rgba(255,255,255,0.20);
            color: var(--white);
            transform: translateY(-2px);
        }
        .hero-platform .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 44px;
            flex-wrap: wrap;
        }
        .hero-platform .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-platform .hero-stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--white);
            line-height: 1.2;
        }
        .hero-platform .hero-stat-item .label {
            font-size: 0.85rem;
            color: #94a3b8;
        }
        @media (max-width: 768px) {
            .hero-platform { padding: 52px 0 44px; text-align: center; }
            .hero-platform .hero-title { font-size: 1.8rem; }
            .hero-platform .hero-desc { margin-left: auto; margin-right: auto; }
            .hero-platform .hero-actions { justify-content: center; }
            .hero-platform .hero-stats { justify-content: center; gap: 24px; }
        }

        /* ===== 入口方式卡片 ===== */
        .entry-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
            height: 100%;
        }
        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .entry-card .entry-icon {
            width: 68px;
            height: 68px;
            background: var(--primary-soft);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.8rem;
            color: var(--primary);
            transition: all var(--transition);
        }
        .entry-card:hover .entry-icon {
            background: var(--primary);
            color: var(--white);
        }
        .entry-card h5 {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .entry-card p {
            font-size: 0.9rem;
            color: var(--text-mid);
            margin-bottom: 16px;
        }
        .entry-card .entry-tag {
            display: inline-block;
            padding: 4px 14px;
            background: #eef2ff;
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== 设备支持 ===== */
        .device-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
            height: 100%;
        }
        .device-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .device-card .device-icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .device-card h6 {
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .device-card p {
            font-size: 0.85rem;
            color: var(--text-mid);
            margin-bottom: 0;
        }

        /* ===== 流程步骤 ===== */
        .step-flow {
            position: relative;
            counter-reset: step;
        }
        .step-item {
            display: flex;
            gap: 20px;
            margin-bottom: 36px;
            position: relative;
        }
        .step-item:last-child { margin-bottom: 0; }
        .step-item .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: var(--white);
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 2;
        }
        .step-item .step-line {
            position: absolute;
            top: 48px;
            left: 23px;
            width: 2px;
            height: calc(100% - 8px);
            background: var(--border-light);
            z-index: 1;
        }
        .step-item:last-child .step-line { display: none; }
        .step-item .step-content {
            flex: 1;
            padding-top: 6px;
        }
        .step-item .step-content h6 {
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .step-item .step-content p {
            font-size: 0.9rem;
            color: var(--text-mid);
            margin-bottom: 0;
        }
        @media (max-width: 576px) {
            .step-item { gap: 14px; }
            .step-item .step-number { width: 40px; height: 40px; font-size: 1rem; }
            .step-item .step-line { left: 19px; }
        }

        /* ===== 特色功能 ===== */
        .feature-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .feature-card .feature-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: var(--primary-soft);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
        }
        .feature-card .feature-text h6 {
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .feature-card .feature-text p {
            font-size: 0.88rem;
            color: var(--text-mid);
            margin-bottom: 0;
        }
        @media (max-width: 576px) {
            .feature-card { flex-direction: column; align-items: center; text-align: center; }
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--white);
            box-shadow: var(--shadow-sm);
        }
        .faq-accordion .accordion-button {
            font-weight: 600;
            color: var(--text-dark);
            background: var(--white);
            padding: 18px 24px;
            font-size: 0.98rem;
            box-shadow: none !important;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-soft);
            color: var(--primary-dark);
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
        }
        .faq-accordion .accordion-body {
            padding: 8px 24px 20px;
            color: var(--text-mid);
            font-size: 0.92rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0b5e8a 0%, #08466a 50%, #06344f 100%);
            color: var(--white);
            padding: 64px 0;
            text-align: center;
        }
        .cta-section .cta-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section .cta-desc {
            font-size: 1.05rem;
            color: #cbd5e1;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            background: var(--secondary);
            color: #0f172a;
            font-weight: 700;
            padding: 16px 44px;
            border-radius: 50px;
            font-size: 1.1rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition);
            border: none;
        }
        .cta-section .btn-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(245,158,11,0.35);
            color: #0f172a;
        }
        @media (max-width: 768px) {
            .cta-section .cta-title { font-size: 1.5rem; }
        }

        /* ===== 标签 / 徽章 ===== */
        .badge-platform {
            background: var(--primary-soft);
            color: var(--primary-dark);
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
        }

        /* ===== 统计数字 ===== */
        .stat-grid { display: flex; gap: 32px; flex-wrap: wrap; justify-content: center; }
        .stat-item { text-align: center; }
        .stat-item .stat-num { font-size: 2.2rem; font-weight: 800; color: var(--primary-dark); line-height: 1.2; }
        .stat-item .stat-label { font-size: 0.9rem; color: var(--text-mid); }

        /* ===== 按钮通用 ===== */
        .btn-outline-primary-custom {
            border: 2px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            padding: 10px 28px;
            border-radius: 50px;
            transition: all var(--transition);
            background: transparent;
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .stat-item .stat-num { font-size: 1.6rem; }
        }

        /* ===== 辅助 ===== */
        .bg-soft-primary { background: var(--primary-soft); }
        .text-secondary-custom { color: var(--secondary); }
        .fw-700 { font-weight: 700; }
        .gap-16 { gap: 16px; }

        /* ===== 面包屑 ===== */
        .breadcrumb-custom {
            background: transparent;
            padding: 12px 0;
            margin-bottom: 0;
            font-size: 0.85rem;
        }
        .breadcrumb-custom .breadcrumb-item a { color: var(--text-mid); }
        .breadcrumb-custom .breadcrumb-item.active { color: var(--primary); font-weight: 500; }

        /* ===== 卡片网格间距 ===== */
        .row.gap-y-4 > [class*="col-"] { margin-bottom: 24px; }

        /* ===== divider ===== */
        .divider-light { border-top: 1px solid var(--border-light); margin: 40px 0; }

        /* ===== 平台入口 Hero 装饰 ===== */
        .hero-platform .hero-shape {
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.06);
            pointer-events: none;
        }
        .hero-platform .hero-shape-2 {
            position: absolute;
            top: 20%;
            left: 60%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.05);
            pointer-events: none;
        }

        /* ===== 平台信息条 ===== */
        .info-bar {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 20px 28px;
            box-shadow: var(--shadow-md);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-top: -32px;
            position: relative;
            z-index: 5;
            border: 1px solid var(--border-light);
        }
        .info-bar .info-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .info-bar .info-item i {
            font-size: 1.5rem;
            color: var(--secondary);
        }
        .info-bar .info-item span {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-dark);
        }
        @media (max-width: 768px) {
            .info-bar { justify-content: center; text-align: center; margin-top: 0; }
        }

        /* ===== 登录提示卡 ===== */
        .tip-card {
            background: #fffbeb;
            border: 1px solid #fde68a;
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .tip-card i { color: var(--secondary); font-size: 1.2rem; margin-top: 2px; }
        .tip-card p { font-size: 0.9rem; color: var(--text-mid); margin-bottom: 0; }

        /* ===== 品牌色强调 ===== */
        .text-primary-dark { color: var(--primary-dark); }
        .bg-primary-dark { background: var(--primary-dark); }

        /* print-friendly */
        @media print {
            .navbar-custom, .footer-custom, .cta-section { display: none; }
        }

/* roulang page: category3 */
:root {
            --primary: #1a5cff;
            --primary-dark: #0e3dab;
            --primary-light: #e8eeff;
            --secondary: #ff6b35;
            --secondary-light: #fff0e8;
            --accent: #00b894;
            --accent-light: #e0f7f0;
            --bg: #f7f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0f1a2e;
            --text: #1a2332;
            --text-light: #5a6a7e;
            --text-muted: #8a9aa8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.10);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.04);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-height: 72px;
        }

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

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

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

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

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

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

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

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

        /* ===== 导航 ===== */
        .navbar-custom {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            padding: 0;
            min-height: var(--header-height);
            transition: var(--transition);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
        }

        .navbar-custom .navbar-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
            padding: 12px 0;
        }

        .navbar-custom .navbar-brand i {
            font-size: 1.6rem;
            color: var(--secondary);
        }

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

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

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

        .navbar-custom .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px 4px 0 0;
        }

        .navbar-custom .navbar-nav .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: 40px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: 12px;
        }

        .navbar-custom .navbar-nav .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 92, 255, 0.25);
        }

        .navbar-custom .navbar-toggler {
            border: none;
            color: var(--text);
            font-size: 1.4rem;
            padding: 6px 10px;
            border-radius: 8px;
            background: var(--primary-light);
        }

        .navbar-custom .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.2);
        }

        @media (max-width: 992px) {
            .navbar-custom .navbar-nav .nav-link {
                padding: 12px 16px;
                border-radius: 0;
            }
            .navbar-custom .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-custom .navbar-nav .nav-cta {
                margin: 12px 16px 20px;
                justify-content: center;
            }
            .navbar-custom .navbar-collapse {
                background: var(--bg-white);
                border-radius: var(--radius);
                box-shadow: var(--shadow);
                padding: 8px 0;
                margin-top: 8px;
                border: 1px solid var(--border);
            }
        }

        /* ===== 页脚 ===== */
        .footer-custom {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            margin-top: 0;
        }

        .footer-custom .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-custom .footer-brand i {
            color: var(--secondary);
            font-size: 1.6rem;
        }

        .footer-custom .footer-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-custom .footer-heading {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-custom .footer-heading::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }

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

        .footer-custom .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-custom .footer-links a i {
            font-size: 0.7rem;
            color: var(--secondary);
        }

        .footer-custom .footer-links a:hover {
            color: #fff;
            transform: translateX(4px);
        }

        .footer-custom .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin: 36px 0 24px;
        }

        .footer-custom .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-custom .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-custom .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 768px) {
            .footer-custom {
                padding: 40px 0 24px;
            }
            .footer-custom .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Hero ===== */
        .hero-security {
            background: linear-gradient(135deg, #0f1a2e 0%, #1a2a4a 50%, #0e3dab 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .hero-security::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(26, 92, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-security::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-security .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 6px 18px 6px 12px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
        }

        .hero-security .hero-badge i {
            color: var(--secondary);
            font-size: 0.9rem;
        }

        .hero-security h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-security h1 span {
            color: var(--secondary);
        }

        .hero-security .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-security .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .hero-security .hero-stats .stat-item {
            text-align: center;
        }

        .hero-security .hero-stats .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }

        .hero-security .hero-stats .stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
        }

        @media (max-width: 768px) {
            .hero-security {
                padding: 60px 0 48px;
                min-height: auto;
            }
            .hero-security h1 {
                font-size: 2rem;
            }
            .hero-security .hero-sub {
                font-size: 1rem;
            }
            .hero-security .hero-stats {
                gap: 24px;
            }
            .hero-security .hero-stats .stat-num {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .hero-security h1 {
                font-size: 1.6rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 80px 0;
        }

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

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
            line-height: 1.25;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.7;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px 4px 12px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-label i {
            font-size: 0.8rem;
        }

        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }

        /* ===== 卡片 ===== */
        .card-modern {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 28px 24px;
            transition: var(--transition);
            height: 100%;
        }

        .card-modern:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .card-modern .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            color: #fff;
        }

        .card-modern .card-icon.blue {
            background: var(--primary);
        }
        .card-modern .card-icon.orange {
            background: var(--secondary);
        }
        .card-modern .card-icon.green {
            background: var(--accent);
        }
        .card-modern .card-icon.purple {
            background: #7c4dff;
        }
        .card-modern .card-icon.teal {
            background: #00bcd4;
        }
        .card-modern .card-icon.pink {
            background: #e91e63;
        }

        .card-modern h5 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .card-modern p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .card-modern .card-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 14px;
        }

        /* ===== 安全步骤流程 ===== */
        .steps-wrapper {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
            counter-reset: step;
        }

        .step-item {
            flex: 1 1 180px;
            max-width: 220px;
            text-align: center;
            position: relative;
            padding: 24px 16px;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            transition: var(--transition);
        }

        .step-item:hover .step-num {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }

        .step-item h6 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .step-item {
                flex: 1 1 140px;
                max-width: 180px;
                padding: 18px 12px;
            }
        }

        @media (max-width: 520px) {
            .step-item {
                flex: 1 1 100%;
                max-width: 100%;
            }
        }

        /* ===== 安全清单 ===== */
        .checklist {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .checklist li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.95rem;
            color: var(--text);
        }

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

        .checklist li i {
            color: var(--accent);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .checklist li .check-label {
            font-weight: 600;
            color: var(--text);
            margin-right: 6px;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
        }

        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            padding: 18px 24px;
            background: var(--bg-white);
            box-shadow: none;
            border: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary);
        }

        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            opacity: 0.6;
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 60px 0;
            text-align: center;
            border-radius: var(--radius-lg);
            margin: 0 24px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 40px;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
            color: var(--primary-dark);
        }

        @media (max-width: 768px) {
            .cta-section {
                margin: 0 16px;
                padding: 40px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== 工具类 ===== */
        .bg-white {
            background: var(--bg-white);
        }
        .bg-light {
            background: var(--bg);
        }
        .bg-primary-soft {
            background: var(--primary-light);
        }
        .bg-accent-soft {
            background: var(--accent-light);
        }
        .rounded-custom {
            border-radius: var(--radius);
        }
        .shadow-card {
            box-shadow: var(--shadow-card);
        }
        .gap-grid {
            gap: 24px;
        }
        .mb-section {
            margin-bottom: 60px;
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 576px) {
            .container-custom {
                padding: 0 12px;
            }
            .section-title {
                font-size: 1.4rem;
            }
        }

        /* ===== 内容卡片 ===== */
        .content-card {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 24px;
            transition: var(--transition);
            align-items: flex-start;
        }

        .content-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .content-card .cc-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .content-card .cc-body h5 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .content-card .cc-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.7;
        }

        @media (max-width: 576px) {
            .content-card {
                flex-direction: column;
                padding: 18px;
            }
        }

        /* ===== 安全提示条 ===== */
        .tip-bar {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--secondary-light);
            border-left: 4px solid var(--secondary);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }

        .tip-bar i {
            color: var(--secondary);
            font-size: 1.2rem;
            margin-top: 2px;
            flex-shrink: 0;
        }

        .tip-bar p {
            font-size: 0.92rem;
            color: var(--text);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .tip-bar.success {
            background: var(--accent-light);
            border-left-color: var(--accent);
        }
        .tip-bar.success i {
            color: var(--accent);
        }
        .tip-bar.info {
            background: var(--primary-light);
            border-left-color: var(--primary);
        }
        .tip-bar.info i {
            color: var(--primary);
        }