/* roulang page: index */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--primary-dark);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-menu a {
            font-size: 16px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }
        /* 下拉菜单 */
        .dropdown-toggle {
            cursor: pointer;
        }
        .dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow-hover);
            min-width: 160px;
            padding: 8px 0;
            z-index: 100;
            list-style: none;
            margin: 4px 0 0 0;
        }
        .dropdown-menu li a {
            display: block;
            padding: 10px 18px;
            font-size: 15px;
            color: var(--text-dark);
            white-space: nowrap;
        }
        .dropdown-menu li a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .dropdown:hover .dropdown-menu {
            display: block;
        }
        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }
        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }
        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* Hero 斜向错位 */
        .hero-section {
            background: var(--bg-light);
            padding: 60px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 40px;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .hero-text {
            padding-top: 30px;
            position: relative;
            z-index: 2;
        }
        .hero-image-wrapper {
            position: relative;
            margin-top: -20px;
            z-index: 1;
        }
        .hero-image-wrapper::before {
            content: '';
            position: absolute;
            top: -16px;
            right: -16px;
            width: 100%;
            height: 100%;
            border: 3px solid var(--primary);
            border-radius: 16px;
            z-index: -1;
            opacity: 0.3;
        }
        .hero-image-wrapper img {
            border-radius: 12px;
            width: 100%;
            height: auto;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            object-fit: cover;
            aspect-ratio: 16 / 10;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(44, 95, 138, 0.1);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 16px;
        }
        .hero-kpi-row {
            display: flex;
            gap: 28px;
            margin-top: 24px;
            flex-wrap: wrap;
        }
        .hero-kpi-item {
            text-align: center;
            min-width: 70px;
        }
        .hero-kpi-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-kpi-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* 板块通用 */
        .section-block {
            padding: 80px 0;
        }
        .section-block.bg-light-block {
            background: var(--bg-light);
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* 卡片 */
        .card-base {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            transition: all var(--transition-fast);
            overflow: hidden;
        }
        .card-base:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .card-image-placeholder {
            background: #E2E8F0;
            aspect-ratio: 16 / 9;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94A3B8;
            font-size: 14px;
        }
        .card-image-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 24px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-outline {
            display: inline-block;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 10px 22px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            background: transparent;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
        }

        /* 入口矩阵 */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .matrix-item {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition-fast);
            cursor: pointer;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .matrix-item:hover {
            border-color: var(--primary);
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .matrix-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .matrix-label {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
        }
        .matrix-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 资料目录 */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .resource-card {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .resource-card:hover {
            border-color: var(--primary);
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .resource-card-body {
            padding: 20px;
        }
        .resource-tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 8px;
        }
        .resource-title {
            font-weight: 600;
            font-size: 17px;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .resource-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .resource-link {
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 10px;
            transition: color var(--transition-fast);
        }
        .resource-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .filter-bar {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 32px;
            justify-content: center;
        }
        .filter-chip {
            padding: 8px 18px;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: #FFFFFF;
            color: var(--text-dark);
            font-size: 14px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-chip:hover,
        .filter-chip.active {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }

        /* 优势数据 */
        .stats-row {
            display: flex;
            gap: 32px;
            justify-content: center;
            flex-wrap: wrap;
            text-align: center;
        }
        .stat-item {
            flex: 1;
            min-width: 140px;
            padding: 24px;
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 8px;
        }
        .stat-bar {
            width: 100%;
            height: 6px;
            background: var(--bg-light);
            border-radius: 3px;
            margin-top: 10px;
            overflow: hidden;
        }
        .stat-bar-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 3px;
            transition: width 1s ease;
        }

        /* 案例 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .case-card {
            display: flex;
            gap: 20px;
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition-fast);
            padding: 20px;
            align-items: flex-start;
        }
        .case-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .case-thumb {
            width: 140px;
            height: 100px;
            flex-shrink: 0;
            border-radius: 6px;
            overflow: hidden;
            background: #E2E8F0;
        }
        .case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-info {
            flex: 1;
            min-width: 0;
        }
        .case-title {
            font-weight: 600;
            font-size: 16px;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .case-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 流程 */
        .steps-row {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .step-item {
            flex: 1;
            min-width: 200px;
            max-width: 280px;
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            padding: 28px 20px;
            text-align: center;
            position: relative;
            transition: all var(--transition-fast);
        }
        .step-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .step-number {
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            margin: 0 auto 16px;
        }
        .step-title {
            font-weight: 600;
            font-size: 17px;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .step-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
        }
        .faq-question {
            width: 100%;
            background: #F8FAFC;
            border: none;
            padding: 16px 20px;
            text-align: left;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: #EEF2F6;
        }
        .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-normal);
            font-size: 18px;
            color: var(--primary);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-normal), padding var(--transition-normal);
            background: #FFFFFF;
            border-left: 3px solid var(--primary);
            margin: 0;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px 20px;
        }
        .faq-answer p {
            margin: 0;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 保障图标条 */
        .guarantee-row {
            display: flex;
            gap: 24px;
            justify-content: center;
            flex-wrap: wrap;
            text-align: center;
        }
        .guarantee-item {
            flex: 1;
            min-width: 120px;
            max-width: 200px;
            padding: 20px;
        }
        .guarantee-icon-circle {
            width: 56px;
            height: 56px;
            background: var(--bg-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            font-size: 24px;
            color: var(--primary);
        }
        .guarantee-label {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .guarantee-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 版本更新 */
        .changelog-list {
            max-width: 700px;
            margin: 0 auto;
            list-style: none;
            padding: 0;
        }
        .changelog-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
            align-items: flex-start;
        }
        .changelog-date {
            flex-shrink: 0;
            background: var(--bg-light);
            padding: 6px 12px;
            border-radius: 16px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            white-space: nowrap;
        }
        .changelog-content {
            flex: 1;
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.6;
        }
        .changelog-version {
            font-weight: 600;
            color: var(--primary);
            margin-right: 6px;
        }

        /* 新闻 */
        .news-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .news-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-color);
            align-items: flex-start;
            transition: background var(--transition-fast);
        }
        .news-item:hover {
            background: #FAFBFC;
        }
        .news-date {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
            padding-top: 2px;
            min-width: 90px;
        }
        .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-title {
            font-weight: 600;
            font-size: 16px;
            color: var(--text-dark);
            margin-bottom: 4px;
            transition: color var(--transition-fast);
        }
        .news-item:hover .news-title {
            color: var(--primary);
        }
        .news-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .news-readmore {
            display: inline-block;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            margin-top: 6px;
            transition: color var(--transition-fast);
        }
        .news-readmore:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* 表单 */
        .cta-form-section {
            background: var(--bg-light);
            border-radius: 12px;
            padding: 48px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid #CBD5E1;
            border-radius: var(--input-radius);
            font-size: 16px;
            transition: border-color var(--transition-fast);
            background: #FFFFFF;
            color: var(--text-dark);
        }
        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(44, 95, 138, 0.08);
        }
        .form-label {
            font-weight: 500;
            font-size: 14px;
            color: var(--text-dark);
            margin-bottom: 6px;
            display: block;
        }
        .form-group {
            margin-bottom: 16px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-col h4 {
            color: #FFFFFF;
            font-weight: 600;
            font-size: 16px;
            margin-bottom: 16px;
        }
        .footer-col p,
        .footer-col a {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            display: block;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 32px auto 0;
            padding: 20px 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            text-align: center;
            font-size: 12px;
            color: #94A3B8;
        }
        .footer-bottom a {
            color: #94A3B8;
            margin: 0 8px;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 深度内容区 */
        .deep-content {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .deep-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 16px;
        }
        .deep-content p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
            text-indent: 2em;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-text {
                padding-top: 0;
                text-align: center;
            }
            .hero-kpi-row {
                justify-content: center;
            }
            .hero-image-wrapper {
                margin-top: 0;
            }
            .hero-image-wrapper::before {
                display: none;
            }
            .matrix-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .resource-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .cta-form-section {
                grid-template-columns: 1fr;
                padding: 32px 24px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                gap: 16px;
            }
            .stat-item {
                min-width: 120px;
                padding: 16px;
            }
            .stat-number {
                font-size: 32px;
            }
            .section-block {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .matrix-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .resource-grid {
                grid-template-columns: 1fr;
            }
            .case-card {
                flex-direction: column;
                padding: 16px;
            }
            .case-thumb {
                width: 100%;
                height: 160px;
            }
            .steps-row {
                flex-direction: column;
                align-items: center;
            }
            .step-item {
                max-width: 100%;
                width: 100%;
            }
            .guarantee-row {
                gap: 12px;
            }
            .guarantee-item {
                min-width: 100px;
                max-width: 150px;
                padding: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-section {
                padding: 40px 0 60px;
            }
            .hero-kpi-row {
                gap: 16px;
            }
            .hero-kpi-num {
                font-size: 24px;
            }
            .section-block {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .filter-bar {
                gap: 8px;
            }
            .filter-chip {
                padding: 6px 14px;
                font-size: 13px;
            }
            .news-item {
                flex-direction: column;
                gap: 4px;
            }
            .news-date {
                min-width: auto;
            }
            .changelog-item {
                flex-direction: column;
                gap: 6px;
            }
            .stats-row {
                flex-direction: column;
                align-items: stretch;
            }
            .stat-item {
                min-width: auto;
            }
        }
        @media (max-width: 520px) {
            .matrix-grid {
                grid-template-columns: 1fr;
            }
            .hero-badge {
                font-size: 12px;
            }
            .container-custom {
                padding: 0 12px;
            }
            .nav-container {
                padding: 0 12px;
            }
            .hero-kpi-row {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .btn-primary,
            .btn-outline {
                padding: 10px 18px;
                font-size: 15px;
            }
            .cta-form-section {
                padding: 24px 16px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu a {
            font-size: 16px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }

        /* 下拉菜单 */
        .nav-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow-hover);
            min-width: 160px;
            padding: 8px 0;
            z-index: 100;
            list-style: none;
            margin: 4px 0 0 0;
        }

        .nav-menu li:hover>.nav-dropdown {
            display: block;
        }

        .nav-dropdown li a {
            display: block;
            padding: 10px 18px;
            font-size: 15px;
            color: var(--text-dark);
            white-space: nowrap;
        }

        .nav-dropdown li a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 面包屑 */
        .breadcrumb-nav {
            background: #FAFBFC;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb-nav .container-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-nav .separator {
            color: #94A3B8;
            user-select: none;
        }

        .breadcrumb-nav .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        .breadcrumb-back {
            margin-left: auto;
            color: var(--primary);
            font-weight: 500;
            font-size: 13px;
        }

        .breadcrumb-back:hover {
            color: var(--primary-dark);
        }

        /* Hero */
        .hero-section {
            background: var(--bg-light);
            position: relative;
            overflow: hidden;
            padding: 60px 0;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .hero-bg-img {
            position: absolute;
            right: 0;
            top: 0;
            bottom: 0;
            width: 48%;
            background-size: cover;
            background-position: center;
            opacity: 0.55;
            border-radius: 0 0 0 40px;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
        }

        .hero-content h1 {
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.3;
            margin: 0 0 16px 0;
        }

        .hero-content .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0 0 24px 0;
        }

        .hero-bullets {
            list-style: none;
            padding: 0;
            margin: 0 0 28px 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .hero-bullets li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.5;
        }

        .hero-bullets li .bullet-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            margin-top: 2px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 16px;
            border: none;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-align: center;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            color: var(--primary);
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 16px;
            border: 2px solid var(--primary);
            transition: all var(--transition-fast);
            text-align: center;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
            transform: translateY(-1px);
        }

        .hero-trust-bar {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }

        .hero-trust-bar .trust-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-trust-bar .trust-dot {
            width: 8px;
            height: 8px;
            background: #22C55E;
            border-radius: 50%;
        }

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

        .section-block.bg-light {
            background: var(--bg-light);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 12px 0;
            text-align: center;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            text-align: center;
            max-width: 700px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        /* 卡片 */
        .card {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: box-shadow var(--transition-fast), transform var(--transition-fast);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #E2E8F0;
            border-radius: var(--card-radius) var(--card-radius) 0 0;
        }

        .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px 0;
            line-height: 1.4;
        }

        .card-body p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0 0 14px 0;
            flex: 1;
        }

        .card-link {
            font-size: 0.9rem;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
            margin-top: auto;
        }

        .card-link:hover {
            color: var(--primary-dark);
        }

        .card-link .arrow {
            transition: transform var(--transition-fast);
        }

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

        /* 非对称网格 */
        .grid-asymmetric {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 24px;
        }

        .grid-asymmetric .card:first-child {
            grid-row: span 2;
        }

        .grid-asymmetric .card:first-child .card-img {
            aspect-ratio: 4 / 3;
        }

        /* 步骤时间线 */
        .steps-timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 40px;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 18px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
            border-radius: 1px;
        }

        .step-item {
            position: relative;
            padding: 0 0 40px 0;
        }

        .step-item:last-child {
            padding-bottom: 0;
        }

        .step-dot {
            position: absolute;
            left: -40px;
            top: 4px;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            z-index: 1;
            box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--border-color);
        }

        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 6px 0;
        }

        .step-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            overflow: hidden;
            background: #FFFFFF;
        }

        .faq-question {
            width: 100%;
            background: #F8FAFC;
            border: none;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-dark);
            text-align: left;
            transition: background var(--transition-fast);
            gap: 12px;
        }

        .faq-question:hover {
            background: #F1F5F9;
        }

        .faq-question .faq-icon-left {
            flex-shrink: 0;
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 700;
        }

        .faq-question .faq-arrow {
            flex-shrink: 0;
            transition: transform var(--transition-normal);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: #FFFFFF;
            border-left: 3px solid var(--primary);
            margin: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 16px 20px;
        }

        .faq-answer p {
            margin: 0;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 数据亮点 */
        .stats-row {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
            justify-content: center;
            text-align: center;
        }

        .stat-item {
            flex: 1;
            min-width: 160px;
            max-width: 220px;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* CTA区域 */
        .cta-section {
            background: var(--primary);
            color: #FFFFFF;
            padding: 60px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin: 0 0 12px 0;
            color: #FFFFFF;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 28px 0;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .btn-cta-white {
            display: inline-block;
            background: #FFFFFF;
            color: var(--primary);
            padding: 14px 32px;
            border-radius: var(--btn-radius);
            font-weight: 700;
            font-size: 16px;
            border: none;
            transition: all var(--transition-fast);
            text-align: center;
        }

        .btn-cta-white:hover {
            background: #F0F4F8;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        /* 深度内容区 */
        .deep-content {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .deep-content h2 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 16px 0;
            text-align: center;
        }

        .deep-content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 28px 0 10px 0;
        }

        .deep-content p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.85;
            margin: 0 0 16px 0;
            text-indent: 2em;
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 50px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px 40px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 600;
            margin: 0 0 16px 0;
            letter-spacing: 0.3px;
        }

        .footer-col p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0 0 10px 0;
            color: var(--text-light);
        }

        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-light);
            padding: 5px 0;
            transition: color var(--transition-fast);
            line-height: 1.5;
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px;
            text-align: center;
            font-size: 12px;
            color: #94A3B8;
            line-height: 2;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .grid-asymmetric {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .grid-asymmetric .card:first-child {
                grid-row: span 1;
            }
            .grid-asymmetric .card:first-child .card-img {
                aspect-ratio: 16 / 9;
            }
            .hero-bg-img {
                width: 40%;
                opacity: 0.35;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .section-block {
                padding: 60px 0;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .hero-section {
                padding: 40px 0;
                min-height: auto;
            }
            .hero-bg-img {
                display: none;
            }
            .hero-content h1 {
                font-size: 1.5rem;
            }
            .hero-content .hero-subtitle {
                font-size: 1rem;
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .hero-cta-group .btn-primary,
            .hero-cta-group .btn-outline {
                width: 100%;
                text-align: center;
            }
            .grid-asymmetric {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section-block {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.9rem;
                margin-bottom: 32px;
            }
            .stats-row {
                gap: 20px;
            }
            .stat-item {
                min-width: 120px;
                max-width: 150px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                font-size: 11px;
                line-height: 1.8;
            }
            .steps-timeline {
                padding-left: 30px;
            }
            .steps-timeline::before {
                left: 13px;
            }
            .step-dot {
                left: -30px;
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .breadcrumb-nav {
                font-size: 13px;
                padding: 10px 0;
            }
            .breadcrumb-back {
                margin-left: 0;
                margin-top: 4px;
                display: block;
                width: 100%;
            }
            .deep-content p {
                text-indent: 1.5em;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.3rem;
            }
            .hero-bullets li {
                font-size: 14px;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .card-body h3 {
                font-size: 1.05rem;
            }
            .stats-row {
                gap: 14px;
            }
            .stat-item {
                min-width: 90px;
                max-width: 120px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .stat-label {
                font-size: 0.8rem;
            }
            .cta-section {
                padding: 40px 0;
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .btn-cta-white {
                padding: 12px 24px;
                font-size: 15px;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
            --accent-teal: #0D9488;
            --accent-amber: #D97706;
            --accent-rose: #E11D48;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea,
        select {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--primary-dark);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            position: relative;
        }
        .nav-menu a {
            font-size: 16px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow-hover);
            min-width: 160px;
            padding: 8px 0;
            z-index: 100;
            list-style: none;
            margin: 4px 0 0 0;
        }
        .nav-menu li:hover>.nav-dropdown {
            display: block;
        }
        .nav-dropdown a {
            display: block;
            padding: 10px 18px;
            font-size: 15px;
            color: var(--text-dark);
            white-space: nowrap;
        }
        .nav-dropdown a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-dropdown a::after {
            display: none !important;
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }
        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }
        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 16px 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: #94A3B8;
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--text-dark);
            font-weight: 500;
        }
        .breadcrumb .back-link {
            margin-left: auto;
            color: var(--primary);
            font-weight: 500;
            font-size: 13px;
            white-space: nowrap;
        }
        .breadcrumb .back-link:hover {
            color: var(--primary-dark);
        }

        /* 卡片 */
        .card-model {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: box-shadow var(--transition-normal), transform var(--transition-normal);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-model:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .card-model .card-img-wrap {
            position: relative;
            width: 100%;
            padding-top: 56.25%;
            background: #E2E8F0;
            overflow: hidden;
        }
        .card-model .card-img-wrap img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-normal);
        }
        .card-model:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-model .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-model .card-tag {
            display: inline-block;
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 20px;
            background: var(--bg-light);
            color: var(--primary);
            font-weight: 500;
            margin-bottom: 10px;
            width: fit-content;
        }
        .card-model .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .card-model .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-model .card-meta {
            font-size: 13px;
            color: #94A3B8;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }
        .card-model .card-link {
            display: inline-block;
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
            margin-top: 10px;
            transition: color var(--transition-fast);
        }
        .card-model .card-link:hover {
            color: var(--primary-dark);
        }

        /* 大卡片 */
        .card-model-large .card-img-wrap {
            padding-top: 40%;
        }
        .card-model-large .card-title {
            font-size: 20px;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
            transition: box-shadow var(--transition-fast);
        }
        .faq-item:hover {
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        .faq-question {
            width: 100%;
            background: #F8FAFC;
            border: none;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            text-align: left;
            gap: 12px;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: #EEF2F7;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            transition: transform var(--transition-normal);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--primary-dark);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }
        .faq-answer-inner {
            padding: 12px 0 0 16px;
            border-left: 3px solid var(--primary);
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: none;
            transition: background var(--transition-fast), transform var(--transition-fast);
            text-align: center;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-outline {
            display: inline-block;
            background: transparent;
            color: var(--primary);
            padding: 11px 27px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: 1.5px solid var(--primary);
            transition: all var(--transition-fast);
            text-align: center;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
        }

        /* 表单 */
        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid #CBD5E1;
            border-radius: var(--input-radius);
            font-size: 16px;
            color: var(--text-dark);
            transition: border-color var(--transition-fast);
            box-sizing: border-box;
            background: #FFFFFF;
        }
        .form-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(44, 95, 138, 0.08);
        }
        .form-input::placeholder {
            color: #94A3B8;
        }

        /* 分页器 */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .pagination .page-btn {
            min-width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background: #FFFFFF;
            color: var(--text-dark);
            font-size: 14px;
            cursor: pointer;
            transition: all var(--transition-fast);
            padding: 0 10px;
        }
        .pagination .page-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .pagination .page-btn.active {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }
        .pagination .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* 流程步骤 */
        .step-item {
            position: relative;
            padding-left: 56px;
            padding-bottom: 32px;
        }
        .step-item::before {
            content: '';
            position: absolute;
            left: 19px;
            top: 40px;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
            border-radius: 1px;
        }
        .step-item:last-child::before {
            display: none;
        }
        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }
        .step-title {
            font-weight: 600;
            font-size: 18px;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .step-desc {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.6;
        }

        /* 统计数字 */
        .stat-block {
            text-align: center;
            padding: 20px 16px;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 60px 20px 30px;
            margin-top: 60px;
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col p {
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            color: #CBD5E1;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: #CBD5E1;
            padding: 4px 0;
            transition: color var(--transition-fast);
            line-height: 1.8;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 40px auto 0;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            text-align: center;
            font-size: 12px;
            color: #94A3B8;
            line-height: 2;
        }
        .footer-bottom a {
            color: #CBD5E1;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .nav-menu {
                gap: 16px;
            }
            .nav-menu a {
                font-size: 14px;
            }
            .card-model-large .card-img-wrap {
                padding-top: 50%;
            }
        }
        @media (max-width: 768px) {
            .hamburger-btn {
                display: flex;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .breadcrumb {
                font-size: 13px;
                gap: 4px;
            }
            .breadcrumb .back-link {
                margin-left: 0;
                margin-top: 4px;
                width: 100%;
            }
            .stat-number {
                font-size: 2rem;
            }
            .step-item {
                padding-left: 48px;
            }
            .step-number {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }
            .card-model .card-title {
                font-size: 16px;
            }
            .card-model-large .card-title {
                font-size: 17px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .nav-logo {
                font-size: 1.15rem;
            }
            .breadcrumb {
                font-size: 12px;
            }
            .card-model .card-body {
                padding: 14px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
                font-size: 15px;
            }
            .pagination .page-btn {
                min-width: 34px;
                height: 34px;
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu a {
            font-size: 15px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
            margin-left: 8px;
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }

        .nav-cta::after {
            display: none !important;
        }

        /* 下拉菜单 */
        .nav-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow-hover);
            min-width: 160px;
            padding: 8px 0;
            z-index: 100;
            list-style: none;
            margin: 4px 0 0 0;
        }

        .nav-menu li:hover>.nav-dropdown {
            display: block;
        }

        .nav-dropdown li {
            display: block;
        }

        .nav-dropdown a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: var(--text-dark);
            white-space: nowrap;
        }

        .nav-dropdown a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .nav-dropdown a::after {
            display: none !important;
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 面包屑 */
        .breadcrumb-nav {
            background: #FAFBFC;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-list a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-list .separator {
            color: #94A3B8;
            user-select: none;
        }

        .breadcrumb-list .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* 板块间距 */
        .section-spacing {
            padding: 80px 0;
        }

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

        /* 卡片 */
        .card {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            transition: all var(--transition-fast);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .card-img-placeholder {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: #E2E8F0;
            border-radius: var(--card-radius) var(--card-radius) 0 0;
            overflow: hidden;
        }

        .card-img-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: none;
            transition: all var(--transition-fast);
            text-align: center;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(44, 95, 138, 0.3);
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            color: var(--primary);
            padding: 11px 27px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: 1.5px solid var(--primary);
            transition: all var(--transition-fast);
            text-align: center;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
        }

        .faq-question {
            width: 100%;
            background: #F8FAFC;
            border: none;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            text-align: left;
            gap: 12px;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: #EDF2F7;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-normal);
            color: var(--primary);
        }

        .faq-question .faq-arrow {
            flex-shrink: 0;
            transition: transform var(--transition-normal);
            font-size: 12px;
            color: var(--text-muted);
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: #FFFFFF;
            border-left: 3px solid var(--primary);
            margin: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 16px 20px;
        }

        .faq-answer p {
            margin: 0;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            color: #CBD5E1;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #CBD5E1;
            margin-bottom: 10px;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            text-align: center;
            padding: 24px 20px;
            font-size: 12px;
            color: #94A3B8;
            max-width: 1200px;
            margin: 0 auto;
            line-height: 2;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 14px;
            }
            .nav-menu a {
                font-size: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .section-spacing {
                padding: 60px 0;
            }
            .section-spacing-sm {
                padding: 40px 0;
            }
        }

        @media (max-width: 768px) {
            .hamburger-btn {
                display: flex;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .section-spacing {
                padding: 48px 0;
            }
            .section-spacing-sm {
                padding: 32px 0;
            }
            .container-custom {
                padding: 0 16px;
            }
            .breadcrumb-list {
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo {
                font-size: 1.15rem;
            }
            .section-spacing {
                padding: 40px 0;
            }
            .btn-primary,
            .btn-outline {
                padding: 10px 20px;
                font-size: 15px;
            }
            .card {
                border-radius: 6px;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu a {
            font-size: 16px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }

        .nav-cta::after {
            display: none !important;
        }

        /* 面包屑 */
        .breadcrumb-nav {
            background: #FAFBFC;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }

        .breadcrumb-nav .container-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-nav .separator {
            color: #CBD5E1;
            user-select: none;
        }

        .breadcrumb-nav .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        .hamburger-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 板块标题 */
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.6;
        }

        /* 卡片 */
        .card-custom {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            transition: all var(--transition-normal);
            overflow: hidden;
            border: 1px solid transparent;
        }

        .card-custom:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
            border-color: #E8ECF1;
        }

        /* 按钮 */
        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(44, 95, 138, 0.25);
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            color: var(--primary);
            padding: 11px 26px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
        }

        /* FAQ手风琴 */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
        }

        .faq-question {
            width: 100%;
            text-align: left;
            background: #F8FAFC;
            border: none;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition-fast);
            font-family: inherit;
        }

        .faq-question:hover {
            background: #EEF2F6;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform var(--transition-normal);
            color: var(--primary);
            font-size: 18px;
            line-height: 20px;
            text-align: center;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: #FFFFFF;
            border-left: 3px solid var(--primary);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 16px 20px;
        }

        .faq-answer p {
            margin: 0;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 步骤条 */
        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            padding: 20px 0;
            position: relative;
        }

        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
        }

        .step-content {
            flex: 1;
            padding-top: 4px;
        }

        .step-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 6px;
        }

        .step-content p {
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 60px 20px 30px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0 0 16px;
            letter-spacing: 0.3px;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0 0 10px;
            color: #CBD5E1;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #CBD5E1;
            padding: 4px 0;
            transition: color var(--transition-fast);
            line-height: 1.6;
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            font-size: 12px;
            color: #94A3B8;
            max-width: 1200px;
            margin: 0 auto;
            line-height: 2;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .nav-menu {
                gap: 14px;
            }
            .nav-menu a {
                font-size: 14px;
            }
        }

        @media (max-width: 768px) {
            .hamburger-btn {
                display: flex;
            }
            .nav-menu {
                display: none;
            }
            .nav-container {
                height: 56px;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .step-item {
                gap: 14px;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 17px;
            }
            .card-custom {
                margin-bottom: 16px;
            }
            .breadcrumb-nav {
                font-size: 13px;
                padding: 10px 0;
            }
        }

        @media (max-width: 520px) {
            .section-title {
                font-size: 1.35rem;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
                font-size: 15px;
            }
            .step-item {
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
            .footer-bottom {
                font-size: 11px;
            }
            .nav-logo {
                font-size: 1.2rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu a {
            font-size: 16px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }

        .nav-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow-hover);
            min-width: 160px;
            padding: 8px 0;
            z-index: 100;
            list-style: none;
            margin: 4px 0 0 0;
        }

        .nav-menu li:hover>.nav-dropdown {
            display: block;
        }

        .nav-dropdown li a {
            display: block;
            padding: 10px 18px;
            font-size: 15px;
            color: var(--text-dark);
            white-space: nowrap;
        }

        .nav-dropdown li a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 面包屑 */
        .breadcrumb-nav {
            background: #FAFBFC;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }

        .breadcrumb-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-inner a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-inner .separator {
            color: #94A3B8;
        }

        .breadcrumb-inner .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(135deg, #1a365d 0%, #1E4A6E 30%, #2C5F8A 70%, #1a365d 100%);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .hero-left h1 {
            font-size: 2.25rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 16px;
            line-height: 1.3;
        }

        .hero-left .hero-subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 28px;
            line-height: 1.6;
        }

        .hero-left .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary-hero {
            background: #FFFFFF;
            color: var(--primary-dark);
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 16px;
            border: none;
            transition: all var(--transition-fast);
            display: inline-block;
        }

        .btn-primary-hero:hover {
            background: #E8F0F8;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-hero {
            background: transparent;
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            font-weight: 500;
            font-size: 16px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: all var(--transition-fast);
            display: inline-block;
        }

        .btn-outline-hero:hover {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
        }

        .hero-right {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            padding: 28px 24px;
            backdrop-filter: blur(4px);
        }

        .hero-right .stat-title {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 20px;
            text-align: center;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

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

        .hero-stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        .hero-stat-value {
            font-size: 1.3rem;
            font-weight: 700;
            color: #FFFFFF;
        }

        .hero-stat-value.highlight {
            color: #60A5FA;
        }

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

        .section-block.bg-light {
            background: var(--bg-light);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 12px;
            text-align: center;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            margin: 0 auto 40px;
            text-align: center;
            max-width: 600px;
            line-height: 1.6;
        }

        /* 案例卡片网格 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .case-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #E2E8F0;
            border-radius: var(--card-radius) var(--card-radius) 0 0;
        }

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

        .case-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            color: var(--primary);
            background: rgba(44, 95, 138, 0.08);
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .case-card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .case-card-summary {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0 0 14px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .case-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }

        .case-card-link {
            color: var(--primary);
            font-weight: 500;
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }

        .case-card-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* 深度正文区 */
        .deep-content {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .deep-content h2 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 16px;
        }

        .deep-content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 24px 0 10px;
        }

        .deep-content p {
            font-size: 1rem;
            color: var(--text-dark);
            line-height: 1.8;
            margin: 0 0 16px;
        }

        /* 场景卡片 */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            padding: 28px;
            transition: all var(--transition-fast);
            border-left: 4px solid transparent;
        }

        .scenario-card:hover {
            border-left-color: var(--primary);
            box-shadow: var(--card-shadow);
        }

        .scenario-card .scenario-icon {
            font-size: 2rem;
            margin-bottom: 12px;
            display: block;
        }

        .scenario-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px;
        }

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

        /* 流程 */
        .steps-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            text-align: center;
            position: relative;
            padding: 24px 16px;
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            transition: all var(--transition-fast);
        }

        .step-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .step-number {
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin: 0 auto 14px;
        }

        .step-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 6px;
        }

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

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            overflow: hidden;
            background: #FFFFFF;
        }

        .faq-question {
            width: 100%;
            background: #F8FAFC;
            padding: 16px 20px;
            border: none;
            text-align: left;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: #EEF2F6;
        }

        .faq-question .faq-icon-left {
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .faq-question .faq-arrow {
            font-size: 0.8rem;
            transition: transform var(--transition-normal);
            flex-shrink: 0;
            color: var(--text-muted);
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-normal), padding var(--transition-normal);
            padding: 0 20px;
            background: #FFFFFF;
            border-left: 3px solid transparent;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px 20px;
            border-left-color: var(--primary);
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1E4A6E 0%, #2C5F8A 100%);
            padding: 64px 0;
        }

        .cta-inner {
            max-width: 700px;
            margin: 0 auto;
            padding: 0 20px;
            text-align: center;
        }

        .cta-inner h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 12px;
        }

        .cta-inner p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 28px;
            line-height: 1.6;
        }

        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 500px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 16px;
            border-radius: var(--input-radius);
            border: 1px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.1);
            color: #FFFFFF;
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition-fast);
        }

        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .cta-form input:focus {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.15);
        }

        .cta-form .btn-submit {
            padding: 12px 28px;
            background: #FFFFFF;
            color: var(--primary-dark);
            border: none;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .cta-form .btn-submit:hover {
            background: #E8F0F8;
            transform: translateY(-1px);
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: #CBD5E1;
            padding: 48px 0 24px;
        }

        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #FFFFFF;
            margin: 0 0 16px;
        }

        .footer-col p {
            font-size: 0.85rem;
            line-height: 1.6;
            margin: 0 0 8px;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: #CBD5E1;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            max-width: 1200px;
            margin: 32px auto 0;
            padding: 20px 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            font-size: 0.75rem;
            color: #94A3B8;
            text-align: center;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 分页器 */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 20px 0;
        }

        .pagination .page-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            background: #FFFFFF;
            color: var(--text-dark);
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .pagination .page-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .pagination .page-btn.active {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }

        .pagination .page-btn.arrow {
            font-weight: 700;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-right {
                max-width: 500px;
                margin: 0 auto;
                width: 100%;
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .hero-section {
                padding: 40px 0;
            }
            .hero-left h1 {
                font-size: 1.6rem;
            }
            .hero-left .hero-subtitle {
                font-size: 0.95rem;
            }
            .section-block {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .steps-flow {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .breadcrumb-inner {
                font-size: 13px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input {
                width: 100%;
            }
            .case-card-body {
                padding: 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-left h1 {
                font-size: 1.4rem;
            }
            .hero-right {
                padding: 20px 16px;
            }
            .hero-stat-value {
                font-size: 1.1rem;
            }
            .section-block {
                padding: 36px 0;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu a {
            font-size: 16px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }

        .nav-cta.active::after {
            display: none !important;
        }

        /* 下拉菜单 */
        .nav-dropdown {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow-hover);
            min-width: 160px;
            padding: 8px 0;
            z-index: 100;
            list-style: none;
            margin: 4px 0 0 0;
        }

        .nav-menu li:hover>.nav-dropdown {
            display: block;
        }

        .nav-dropdown li {
            display: block;
        }

        .nav-dropdown a {
            display: block;
            padding: 10px 18px;
            font-size: 15px;
            color: var(--text-dark);
            white-space: nowrap;
        }

        .nav-dropdown a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 面包屑 */
        .breadcrumb-nav {
            background: #FAFBFC;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-list a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-separator {
            color: #94A3B8;
            user-select: none;
        }

        .breadcrumb-current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* Hero */
        .category-hero {
            background: linear-gradient(135deg, #F0F4F8 0%, #E8EFF5 40%, #F5F7FA 100%);
            padding: 60px 0 50px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(44, 95, 138, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(44, 95, 138, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        /* 工具卡片 */
        .tool-card {
            background: var(--card-bg);
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: transform var(--transition-fast), box-shadow var(--transition-fast);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .tool-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--card-shadow-hover);
        }

        .tool-card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #E2E8F0;
            display: block;
        }

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

        .tool-card-tag {
            display: inline-block;
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 20px;
            background: #E8F0F7;
            color: var(--primary);
            font-weight: 500;
            margin-bottom: 10px;
            width: fit-content;
        }

        .tool-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .tool-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0 0 12px;
            flex: 1;
        }

        .tool-card-date {
            font-size: 13px;
            color: #94A3B8;
            margin-bottom: 12px;
        }

        .tool-card-link {
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
            margin-top: auto;
        }

        .tool-card-link:hover {
            color: var(--primary-dark);
        }

        .tool-card-link .arrow-icon {
            display: inline-block;
            transition: transform var(--transition-fast);
        }

        .tool-card-link:hover .arrow-icon {
            transform: translateX(3px);
        }

        /* 侧边栏 */
        .sidebar {
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            padding: 24px;
        }

        .sidebar-section {
            margin-bottom: 28px;
        }

        .sidebar-section:last-child {
            margin-bottom: 0;
        }

        .sidebar-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
            display: inline-block;
        }

        .sidebar-search {
            display: flex;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--input-radius);
            overflow: hidden;
        }

        .sidebar-search input {
            flex: 1;
            border: none;
            padding: 10px 14px;
            font-size: 14px;
            outline: none;
            background: #FAFBFC;
            color: var(--text-dark);
        }

        .sidebar-search input:focus {
            background: #FFFFFF;
        }

        .sidebar-search button {
            background: var(--primary);
            color: #FFFFFF;
            border: none;
            padding: 10px 16px;
            font-size: 14px;
            cursor: pointer;
            transition: background var(--transition-fast);
            white-space: nowrap;
        }

        .sidebar-search button:hover {
            background: var(--primary-dark);
        }

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

        .sidebar-tag {
            display: inline-block;
            font-size: 13px;
            padding: 5px 12px;
            border-radius: 20px;
            background: #F1F5F9;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-tag:hover {
            background: var(--primary);
            color: #FFFFFF;
        }

        .sidebar-recent-item {
            display: flex;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid #F1F5F9;
            align-items: flex-start;
        }

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

        .sidebar-recent-thumb {
            width: 52px;
            height: 52px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            background: #E2E8F0;
        }

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

        .sidebar-recent-name {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            line-height: 1.4;
            margin: 0 0 4px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-recent-date {
            font-size: 12px;
            color: #94A3B8;
        }

        /* 分页器 */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
            padding: 10px 0;
        }

        .pagination-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 8px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .pagination-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F8FAFC;
        }

        .pagination-btn.active {
            background: var(--primary);
            color: #FFFFFF;
            border-color: var(--primary);
        }

        .pagination-btn.disabled {
            color: #CBD5E1;
            cursor: not-allowed;
            pointer-events: none;
            border-color: #E2E8F0;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
            transition: box-shadow var(--transition-fast);
        }

        .faq-item:hover {
            box-shadow: var(--card-shadow);
        }

        .faq-question {
            width: 100%;
            background: #F8FAFC;
            border: none;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-dark);
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition-fast);
            font-family: inherit;
        }

        .faq-question:hover {
            background: #F0F4F8;
        }

        .faq-question .faq-icon-left {
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        .faq-question .faq-arrow {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition-normal);
            flex-shrink: 0;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: #FFFFFF;
            border-left: 3px solid var(--primary);
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 16px 20px;
        }

        .faq-answer p {
            margin: 0;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #2C5F8A 0%, #1E4A6E 100%);
            padding: 60px 0;
            text-align: center;
            color: #FFFFFF;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 24px auto 0;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input {
            flex: 1;
            min-width: 220px;
            padding: 12px 16px;
            border-radius: var(--input-radius);
            border: 1px solid transparent;
            font-size: 15px;
            outline: none;
            background: #FFFFFF;
            color: var(--text-dark);
            transition: border-color var(--transition-fast);
        }

        .cta-form input:focus {
            border-color: var(--primary-light);
        }

        .cta-form button {
            padding: 12px 28px;
            border-radius: var(--btn-radius);
            border: none;
            background: #FFFFFF;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .cta-form button:hover {
            background: #F0F4F8;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 50px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px 40px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 16px;
            letter-spacing: 0.3px;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0 0 8px;
            color: #CBD5E1;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #CBD5E1;
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px;
            text-align: center;
            font-size: 12px;
            color: #94A3B8;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-bottom p {
            margin: 4px 0;
        }

        .footer-bottom a {
            color: #CBD5E1;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 14px;
            }
            .nav-menu a {
                font-size: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .category-hero {
                padding: 40px 0 36px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-hero {
                padding: 32px 0 28px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .tool-card-body {
                padding: 16px;
            }
            .tool-card-title {
                font-size: 16px;
            }
            .sidebar {
                margin-top: 24px;
            }
            .cta-form {
                flex-direction: column;
                align-items: center;
            }
            .cta-form input {
                width: 100%;
                max-width: 400px;
            }
            .cta-form button {
                width: 100%;
                max-width: 400px;
            }
            .pagination-btn {
                min-width: 34px;
                height: 34px;
                font-size: 13px;
            }
            .breadcrumb-list {
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .nav-container {
                height: 56px;
            }
            .nav-logo {
                font-size: 1.15rem;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .tool-card-image {
                aspect-ratio: 16 / 10;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer p {
                font-size: 14px;
            }
            .cta-section {
                padding: 40px 0;
            }
            .site-footer {
                padding: 36px 0 0;
            }
            .footer-bottom {
                padding: 16px;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #2C5F8A;
            --primary-dark: #1E4A6E;
            --primary-light: #3A7DB5;
            --bg-light: #F0F4F8;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #CBD5E1;
            --border-color: #E2E8F0;
            --card-bg: #FFFFFF;
            --footer-bg: #1E293B;
            --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
            --card-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
            --card-radius: 8px;
            --btn-radius: 6px;
            --input-radius: 4px;
            --transition-fast: 0.2s ease;
            --transition-normal: 0.3s ease;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background-color: #FFFFFF;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 16px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 导航栏 */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition-fast);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu li {
            position: relative;
        }

        .nav-menu a {
            font-size: 15px;
            color: var(--text-dark);
            padding: 8px 0;
            display: inline-block;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
        }

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .nav-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            padding: 8px 18px !important;
            border-radius: var(--btn-radius);
            font-weight: 500;
            transition: background var(--transition-fast);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--primary-dark) !important;
            color: #FFFFFF !important;
        }

        .nav-cta::after {
            display: none !important;
        }

        /* 汉堡菜单 */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
            z-index: 1001;
        }

        .hamburger-btn span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition-fast);
        }

        .hamburger-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 80px 24px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 17px;
            color: var(--text-dark);
            border-radius: 8px;
            transition: background var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .mobile-cta {
            background: var(--primary);
            color: #FFFFFF !important;
            text-align: center;
            margin-top: 16px;
            border-radius: var(--btn-radius);
        }

        /* 面包屑 */
        .breadcrumb-nav {
            background: #FAFBFC;
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb-nav .container-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
        }

        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-nav .separator {
            color: #94A3B8;
            margin: 0 4px;
            user-select: none;
        }

        .breadcrumb-nav .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* 进度条 */
        .progress-bar-container {
            background: #E2E8F0;
            border-radius: 10px;
            height: 12px;
            overflow: hidden;
            width: 100%;
        }

        .progress-bar-fill {
            background: linear-gradient(90deg, #2C5F8A, #3A7DB5);
            height: 100%;
            border-radius: 10px;
            transition: width 0.6s ease;
        }

        /* 奖励卡片 */
        .reward-card {
            background: #FFFFFF;
            border: 2px dashed var(--primary-light);
            border-radius: var(--card-radius);
            padding: 20px;
            position: relative;
            transition: all var(--transition-fast);
        }

        .reward-card:hover {
            border-color: var(--primary);
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .reward-card .reward-badge {
            position: absolute;
            top: -12px;
            right: 16px;
            background: #F59E0B;
            color: #FFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 12px;
            letter-spacing: 0.5px;
        }

        /* FAQ 手风琴 */
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            background: #FFFFFF;
        }

        .faq-question {
            background: #F8FAFC;
            padding: 16px 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-dark);
            transition: background var(--transition-fast);
            user-select: none;
            gap: 12px;
        }

        .faq-question:hover {
            background: #F1F5F9;
        }

        .faq-question .faq-icon-left {
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        .faq-question .faq-arrow {
            transition: transform var(--transition-normal);
            font-size: 14px;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background: #FFFFFF;
            border-left: 3px solid var(--primary);
            margin-left: 0;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 16px 20px 16px 20px;
        }

        .faq-answer p {
            margin: 0;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* 步骤时间线 */
        .step-timeline {
            position: relative;
            padding-left: 36px;
        }

        .step-timeline::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: #E2E8F0;
            border-radius: 1px;
        }

        .step-item {
            position: relative;
            margin-bottom: 28px;
            padding-left: 20px;
        }

        .step-item:last-child {
            margin-bottom: 0;
        }

        .step-dot {
            position: absolute;
            left: -27px;
            top: 6px;
            width: 22px;
            height: 22px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 12px;
            font-weight: 700;
            z-index: 1;
            box-shadow: 0 0 0 4px rgba(44, 95, 138, 0.12);
        }

        .step-dot.completed {
            background: #10B981;
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
        }

        /* 卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .info-card {
            background: #FFFFFF;
            border-radius: var(--card-radius);
            box-shadow: var(--card-shadow);
            padding: 28px 24px;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .info-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
            border-color: #E2E8F0;
        }

        .info-card .card-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .info-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px 0;
        }

        .info-card p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            margin: 0;
        }

        /* CTA 区域 */
        .cta-section-alt {
            background: linear-gradient(135deg, #1E4A6E 0%, #2C5F8A 50%, #3A7DB5 100%);
            border-radius: 16px;
            padding: 48px 40px;
            color: #FFFFFF;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section-alt::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section-alt::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section-alt h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 12px 0;
            position: relative;
            z-index: 1;
        }

        .cta-section-alt p {
            font-size: 16px;
            opacity: 0.9;
            margin: 0 0 24px 0;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-white {
            display: inline-block;
            background: #FFFFFF;
            color: var(--primary) !important;
            padding: 14px 32px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition-fast);
            position: relative;
            z-index: 1;
            border: none;
            cursor: pointer;
        }

        .btn-white:hover {
            background: #F0F4F8;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-white {
            display: inline-block;
            background: transparent;
            color: #FFFFFF !important;
            padding: 14px 32px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition-fast);
            position: relative;
            z-index: 1;
            border: 2px solid rgba(255, 255, 255, 0.5);
            cursor: pointer;
        }

        .btn-outline-white:hover {
            border-color: #FFFFFF;
            background: rgba(255, 255, 255, 0.08);
        }

        /* 页脚 */
        .site-footer {
            background: var(--footer-bg);
            color: var(--text-light);
            padding: 48px 0 0 0;
            margin-top: 80px;
        }

        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin: 0 0 16px 0;
            letter-spacing: 0.3px;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.8;
            margin: 0 0 8px 0;
            color: #94A3B8;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #94A3B8;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 36px;
            padding: 20px;
            text-align: center;
            font-size: 12px;
            color: #64748B;
            line-height: 2;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: #FFFFFF;
        }

        .footer-bottom p {
            margin: 2px 0;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-menu {
                gap: 12px;
            }
            .nav-menu a {
                font-size: 14px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .hamburger-btn {
                display: flex;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta-desktop {
                display: none;
            }
            .nav-container {
                height: 56px;
            }
            .nav-logo {
                font-size: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .cta-section-alt {
                padding: 32px 20px;
                border-radius: 12px;
            }
            .cta-section-alt h2 {
                font-size: 22px;
            }
            .breadcrumb-nav {
                font-size: 13px;
                padding: 10px 0;
            }
            .step-timeline {
                padding-left: 28px;
            }
            .step-timeline::before {
                left: 11px;
            }
            .step-dot {
                left: -23px;
                width: 18px;
                height: 18px;
                font-size: 10px;
            }
            .step-item {
                padding-left: 14px;
            }
            .info-card {
                padding: 20px 16px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 14px;
            }
            .nav-container {
                padding: 0 14px;
            }
            .cta-section-alt h2 {
                font-size: 20px;
            }
            .btn-white,
            .btn-outline-white {
                padding: 12px 24px;
                font-size: 15px;
                width: 100%;
                box-sizing: border-box;
            }
            .btn-outline-white {
                margin-top: 8px;
            }
            .reward-card {
                padding: 16px;
            }
        }