/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }

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

        /* 导航样式 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }

        /* 移动端导航 */
        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }
        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }
        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            padding: 80px 0;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.82) 0%, rgba(37, 99, 235, 0.68) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
        }
        .hero-title {
            font-size: clamp(32px, 4.2vw, 52px);
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }
        .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            margin-bottom: 32px;
            max-width: 560px;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-primary-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }
        .btn-primary-hero:hover {
            background: #F0F4FF;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
        }
        .btn-secondary-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 13px 26px;
            border: 1.5px solid rgba(255, 255, 255, 0.65);
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }
        .btn-secondary-hero:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        /* 演示面板 */
        .demo-panel {
            background: rgba(255, 255, 255, 0.96);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: 0 20px 60px rgba(15, 40, 80, 0.25);
        }
        .demo-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            padding-bottom: 14px;
            border-bottom: 1px solid #E8EEF8;
        }
        .demo-panel-title {
            font-weight: 700;
            font-size: 15px;
            color: var(--dark-navy);
        }
        .demo-badge {
            font-size: 12px;
            font-weight: 600;
            color: #16A34A;
            background: #F0FDF4;
            padding: 4px 10px;
            border-radius: 20px;
        }
        .demo-kpi-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin-bottom: 20px;
        }
        .demo-kpi {
            background: #F8FAFC;
            border-radius: 12px;
            padding: 14px 12px;
            text-align: center;
        }
        .demo-kpi-value {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
        }
        .demo-kpi-label {
            font-size: 12px;
            color: var(--mid-gray);
            margin-top: 4px;
        }
        .demo-bar-chart {
            background: #F8FAFC;
            border-radius: 12px;
            padding: 16px;
            height: 120px;
            display: flex;
            align-items: flex-end;
            gap: 14px;
        }
        .demo-bar {
            flex: 1;
            background: linear-gradient(180deg, #3B82F6 0%, #2563EB 80%);
            border-radius: 6px 6px 0 0;
            min-height: 20px;
            transition: height 0.5s ease;
            position: relative;
        }
        .demo-bar::after {
            content: attr(data-label);
            position: absolute;
            bottom: -22px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 11px;
            color: var(--mid-gray);
            white-space: nowrap;
        }

        /* 区块基础 */
        .section-block {
            padding: 88px 0;
        }
        .section-block-alt {
            background: var(--cool-gray);
        }
        .section-block-dark {
            background: var(--dark-navy);
            color: #fff;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark-navy);
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--mid-gray);
            line-height: 1.8;
            max-width: 720px;
        }
        .section-block-dark .section-title {
            color: #fff;
        }
        .section-block-dark .section-desc {
            color: rgba(255, 255, 255, 0.72);
        }

        /* 品牌介绍 */
        .brand-intro-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
            align-items: center;
        }
        .brand-intro-img-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .brand-intro-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .brand-intro-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 16px;
        }
        .brand-intro-text p {
            font-size: 15px;
            line-height: 1.9;
            color: var(--body-text);
            margin-bottom: 14px;
        }

        /* 功能对比表 */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            background: #fff;
        }
        .comparison-table {
            width: 100%;
            min-width: 860px;
            border-collapse: collapse;
            font-size: 14px;
        }
        .comparison-table th {
            background: #F8FAFC;
            padding: 18px 20px;
            text-align: left;
            font-weight: 700;
            color: var(--dark-navy);
            border-bottom: 1px solid var(--border-light);
            white-space: nowrap;
        }
        .comparison-table th:nth-child(2) {
            background: #EBF1FE;
            color: var(--primary);
        }
        .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid #F1F5F9;
            color: var(--body-text);
            line-height: 1.6;
        }
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        .comparison-check {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: #16A34A;
        }
        .comparison-partial {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #D97706;
            font-weight: 500;
        }

        /* 推荐档卡片 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .pricing-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .pricing-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-3px);
        }
        .pricing-card.featured {
            border-color: var(--primary);
            background: linear-gradient(180deg, #FFFFFF 0%, #F5F8FF 100%);
            position: relative;
        }
        .pricing-card.featured::before {
            content: '推荐方案';
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 18px;
            border-radius: 20px;
            white-space: nowrap;
        }
        .pricing-card-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
        }
        .pricing-card-price {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .pricing-card-price span {
            font-size: 15px;
            font-weight: 500;
            color: var(--mid-gray);
        }
        .pricing-card-who {
            font-size: 14px;
            color: var(--mid-gray);
            margin-bottom: 18px;
            padding-bottom: 18px;
            border-bottom: 1px solid #EEF2F8;
        }
        .pricing-card-list {
            list-style: none;
            margin-bottom: 24px;
            flex: 1;
        }
        .pricing-card-list li {
            padding: 7px 0;
            font-size: 14px;
            color: var(--body-text);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }
        .pricing-card-list li::before {
            content: '✓';
            color: var(--primary);
            font-weight: 700;
            flex-shrink: 0;
        }
        .btn-outline-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            padding: 12px 22px;
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            width: 100%;
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
        }
        .btn-solid-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            padding: 12px 22px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            width: 100%;
        }
        .btn-solid-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
        }

        /* 爆款清单 */
        .hotlist-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .hotlist-item {
            display: flex;
            gap: 16px;
            background: #fff;
            border-radius: var(--radius-card);
            padding: 20px 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: var(--transition-base);
            align-items: flex-start;
        }
        .hotlist-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .hotlist-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            flex-shrink: 0;
            min-width: 36px;
        }
        .hotlist-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 6px;
        }
        .hotlist-content p {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.7;
            margin-bottom: 10px;
        }
        .btn-text-primary {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition-base);
        }
        .btn-text-primary:hover {
            gap: 8px;
            color: var(--primary-dark);
        }

        /* 合作伙伴/能力标签 */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .capability-card {
            background: #fff;
            border-radius: 14px;
            padding: 20px 18px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            text-align: center;
            transition: var(--transition-base);
        }
        .capability-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .capability-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            font-size: 20px;
            color: var(--primary);
            font-weight: 700;
        }
        .capability-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 6px;
        }
        .capability-card p {
            font-size: 13px;
            color: var(--mid-gray);
            line-height: 1.7;
        }

        /* 资讯模块 */
        .news-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.7fr;
            gap: 32px;
        }
        .news-list-item {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid #EEF2F8;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .news-list-item:hover {
            padding-left: 6px;
        }
        .news-list-date {
            min-width: 64px;
            font-size: 13px;
            font-weight: 600;
            color: var(--mid-gray);
            line-height: 1.6;
        }
        .news-list-body h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 6px;
            line-height: 1.5;
        }
        .news-list-body p {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.7;
        }
        .news-sidebar {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            height: fit-content;
        }
        .news-sidebar h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid #EEF2F8;
        }
        .news-sidebar-img {
            border-radius: 12px;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .news-sidebar-img img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .news-sidebar p {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.7;
        }

        /* 用户评价 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: var(--transition-base);
        }
        .testimonial-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .testimonial-stars {
            color: #F59E0B;
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .testimonial-quote {
            font-size: 14px;
            color: var(--body-text);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .testimonial-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
        }
        .testimonial-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark-navy);
        }
        .testimonial-role {
            font-size: 12px;
            color: var(--mid-gray);
        }

        /* CTA */
        .cta-section {
            background: var(--dark-navy);
            padding: 72px 0;
            color: #fff;
        }
        .cta-wrapper {
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: clamp(24px, 2.8vw, 32px);
            font-weight: 700;
            margin-bottom: 14px;
        }
        .cta-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-input {
            flex: 1;
            min-width: 220px;
            max-width: 360px;
            padding: 13px 18px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 15px;
            transition: var(--transition-base);
        }
        .cta-input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .cta-input:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.14);
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
        }
        .btn-cta-primary {
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .btn-cta-primary:hover {
            background: #3B82F6;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
        }
        .btn-cta-secondary {
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .btn-cta-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }

        /* FAQ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 700;
            font-size: 15px;
            color: var(--dark-navy);
            user-select: none;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #F1F5F9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--mid-gray);
            transition: var(--transition-base);
        }
        .faq-item.open .faq-icon {
            background: var(--primary-light);
            color: var(--primary);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 22px;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            line-height: 1.8;
            color: var(--body-text);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark-navy);
            color: rgba(255, 255, 255, 0.72);
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand .footer-logo span {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
            transition: var(--transition-base);
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 3px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 24px;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 12px;
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        .footer-beian {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 18px;
            }
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .demo-panel {
                max-width: 560px;
                margin: 0 auto;
            }
            .pricing-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-card.featured {
                grid-column: span 2;
            }
            .capability-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-intro-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hotlist-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-header-row {
                display: flex;
                align-items: center;
                justify-content: space-between;
                height: 64px;
            }
            .hero-section {
                min-height: auto;
                padding: 56px 0;
            }
            .hero-title {
                font-size: 30px;
            }
            .section-block {
                padding: 56px 0;
            }
            .pricing-grid {
                grid-template-columns: 1fr;
            }
            .pricing-card.featured {
                grid-column: span 1;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .demo-kpi-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .demo-kpi {
                padding: 10px 8px;
            }
            .demo-kpi-value {
                font-size: 16px;
            }
            .demo-bar-chart {
                height: 90px;
                gap: 8px;
            }
            .demo-panel {
                padding: 18px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .btn-primary-hero,
            .btn-secondary-hero {
                width: 100%;
                justify-content: center;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-input {
                max-width: 100%;
            }
            .btn-cta-primary,
            .btn-cta-secondary {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .demo-kpi-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .demo-kpi-value {
                font-size: 14px;
            }
            .demo-kpi-label {
                font-size: 10px;
            }
            .comparison-table {
                min-width: 720px;
                font-size: 12px;
            }
            .comparison-table th,
            .comparison-table td {
                padding: 12px 14px;
            }
            .hotlist-item {
                flex-direction: column;
                gap: 8px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }

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

        /* 导航样式 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
        }

        .nav-right {
            justify-content: flex-start;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
        }

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

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

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

        .nav-link.active::after {
            width: 100%;
        }

        /* 移动端导航 */
        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }

        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

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

        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        /* 面包屑 */
        .breadcrumb-section {
            background: var(--cool-gray);
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
        }

        .breadcrumb-inner {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--mid-gray);
        }

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

        .breadcrumb-inner .separator {
            color: #CBD5E1;
        }

        .breadcrumb-inner .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* 分类头部 Hero - 白皮书获客版式 */
        .solution-hero-section {
            background: linear-gradient(135deg, #FFFFFF 0%, #F6F8FC 100%);
            padding: 64px 0 72px;
            border-bottom: 1px solid var(--border-light);
        }

        .solution-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .solution-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .solution-hero-title {
            font-size: clamp(30px, 3.6vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--dark-navy);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .solution-hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--body-text);
            margin-bottom: 24px;
            max-width: 520px;
        }

        .solution-hero-list {
            list-style: none;
            padding: 0;
            margin: 0 0 28px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 20px;
        }

        .solution-hero-list li {
            font-size: 14px;
            color: var(--body-text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-hero-list li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }

        /* 白皮书留资卡片 */
        .whitepaper-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 28px;
            transition: var(--transition-base);
        }

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

        .whitepaper-cover {
            background: linear-gradient(135deg, var(--dark-navy) 0%, var(--primary-dark) 100%);
            border-radius: 10px;
            padding: 24px;
            margin-bottom: 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 140px;
            text-align: center;
        }

        .whitepaper-cover-icon {
            width: 52px;
            height: 52px;
            background: rgba(255, 255, 255, 0.16);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
        }

        .whitepaper-cover-icon svg {
            width: 26px;
            height: 26px;
            color: #fff;
        }

        .whitepaper-cover-title {
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .whitepaper-cover-subtitle {
            color: rgba(255, 255, 255, 0.75);
            font-size: 13px;
        }

        .whitepaper-toc {
            margin-bottom: 20px;
        }

        .whitepaper-toc h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 12px;
        }

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

        .whitepaper-toc li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 7px 0;
            font-size: 14px;
            color: var(--body-text);
            border-bottom: 1px solid #F1F5F9;
        }

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

        .whitepaper-toc .toc-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 6px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .whitepaper-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .whitepaper-form input {
            padding: 12px 16px;
            border: 1px solid #CBD5E1;
            border-radius: var(--radius-btn);
            font-size: 14px;
            transition: var(--transition-base);
            width: 100%;
            background: #fff;
        }

        .whitepaper-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .whitepaper-form button {
            padding: 13px 20px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

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

        /* 通用板块 */
        .solution-section {
            padding: 72px 0;
        }

        .solution-section-alt {
            background: var(--cool-gray);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--dark-navy);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--mid-gray);
            max-width: 640px;
            margin-bottom: 36px;
        }

        /* 方案卡 */
        .solution-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .solution-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 28px;
            transition: var(--transition-base);
        }

        .solution-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-4px);
        }

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

        .solution-card-icon svg {
            width: 24px;
            height: 24px;
            color: var(--primary);
        }

        .solution-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .solution-card p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--mid-gray);
        }

        /* 场景标签 */
        .scenario-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }

        .scenario-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--body-text);
            transition: var(--transition-base);
        }

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

        .scenario-tag.active-tag {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            font-weight: 600;
        }

        /* 流程步骤 */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 24px;
            text-align: left;
            transition: var(--transition-base);
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 15px;
            margin-bottom: 14px;
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .step-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--mid-gray);
        }

        /* 数据指标 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 28px;
            text-align: center;
            transition: var(--transition-base);
        }

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

        .metric-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--mid-gray);
            margin-bottom: 6px;
        }

        .metric-detail {
            font-size: 13px;
            color: #94A3B8;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-section {
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 72px 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            overflow: hidden;
            transition: var(--transition-base);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-navy);
            gap: 16px;
            text-align: left;
            transition: var(--transition-base);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            font-weight: 700;
            transition: var(--transition-base);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--mid-gray);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--dark-navy) 0%, #16294D 60%, var(--primary-dark) 100%);
            padding: 72px 0 80px;
        }

        .cta-inner {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
        }

        .cta-title {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .cta-form input {
            padding: 14px 18px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-btn);
            font-size: 15px;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            min-width: 280px;
            transition: var(--transition-base);
        }

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

        .cta-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
            background: rgba(255, 255, 255, 0.12);
        }

        .cta-form button {
            padding: 14px 28px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 15px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .cta-form button:hover {
            background: #F0F4FF;
            transform: translateY(-2px);
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark-navy);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-logo span {
            color: var(--primary);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
        }

        .footer-beian {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px 16px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-beian a {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-beian a:hover {
            color: #fff;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }

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

            .site-header .container {
                padding: 0 16px;
            }

            .mobile-header-row {
                display: flex !important;
                align-items: center;
                justify-content: space-between;
                height: 64px;
                gap: 16px;
            }

            .solution-hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

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

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

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

        @media (max-width: 640px) {
            .solution-hero-title {
                font-size: 28px;
            }

            .solution-card-grid,
            .step-grid,
            .metrics-grid {
                grid-template-columns: 1fr;
            }

            .solution-hero-list {
                grid-template-columns: 1fr;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-form {
                flex-direction: column;
                width: 100%;
            }

            .cta-form input {
                min-width: auto;
                width: 100%;
            }

            .cta-form button {
                width: 100%;
                justify-content: center;
            }

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

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

            .cta-section {
                padding: 48px 0 56px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }
        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }
        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--mid-gray);
            padding: 24px 0 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--mid-gray);
            transition: var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #CBD5E1;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        .category-header {
            padding: 32px 0 48px;
            border-bottom: 1px solid var(--border-light);
            background: linear-gradient(180deg, #FFFFFF 0%, var(--cool-gray) 100%);
        }
        .category-header h1 {
            font-size: clamp(28px, 3.2vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--dark-navy);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .category-header .intro {
            font-size: 16px;
            line-height: 1.8;
            color: var(--body-text);
            max-width: 720px;
        }
        .hero-cat {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
            padding: 48px 0 64px;
        }
        .hero-cat .hero-text h2 {
            font-size: clamp(24px, 2.4vw, 32px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-navy);
            margin-bottom: 16px;
        }
        .hero-cat .hero-text p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--body-text);
            margin-bottom: 28px;
        }
        .hero-visual {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow-hover);
            aspect-ratio: 4 / 5;
            max-height: 480px;
            width: 100%;
        }
        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .hero-visual:hover img {
            transform: scale(1.03);
        }
        .hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 30, 61, 0.15) 0%, rgba(15, 30, 61, 0.45) 100%);
            pointer-events: none;
        }
        .hero-visual .visual-label {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            z-index: 2;
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.02em;
            background: rgba(15, 30, 61, 0.65);
            padding: 10px 16px;
            border-radius: 8px;
            backdrop-filter: blur(8px);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            border: 1px solid var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            font-size: 16px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 500;
            font-size: 15px;
            padding: 4px 0;
            border-bottom: 1px solid transparent;
            transition: var(--transition-base);
        }
        .btn-text:hover {
            border-bottom-color: var(--primary);
        }
        .btn-text svg {
            width: 16px;
            height: 16px;
            transition: transform 0.25s ease;
        }
        .btn-text:hover svg {
            transform: translateX(4px);
        }
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background: var(--cool-gray);
        }
        .section-title {
            font-size: clamp(22px, 2.4vw, 30px);
            font-weight: 700;
            line-height: 1.35;
            color: var(--dark-navy);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-sub {
            font-size: 15px;
            line-height: 1.75;
            color: var(--mid-gray);
            max-width: 640px;
            margin-bottom: 40px;
        }
        .capability-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .capability-grid .cap-card:first-child {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            align-items: center;
        }
        .cap-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: var(--transition-base);
        }
        .cap-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .cap-card .cap-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            margin-bottom: 16px;
        }
        .cap-card .cap-icon svg {
            width: 24px;
            height: 24px;
            color: var(--primary);
        }
        .cap-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cap-card p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--body-text);
        }
        .cap-card .cap-img {
            border-radius: 12px;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }
        .cap-card .cap-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .scenario-item {
            background: #fff;
            border-radius: 14px;
            padding: 20px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .scenario-item:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .scenario-item .sc-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 4px;
            width: fit-content;
        }
        .scenario-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-navy);
            line-height: 1.4;
        }
        .scenario-item p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--mid-gray);
        }
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .steps-row::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: var(--border-light);
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: #fff;
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.15);
        }
        .step-item h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--dark-navy);
            line-height: 1.4;
        }
        .step-item p {
            font-size: 13px;
            line-height: 1.6;
            color: var(--mid-gray);
            max-width: 180px;
        }
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--dark-navy);
            border-radius: var(--radius-card);
            padding: 40px 32px;
        }
        .data-block {
            text-align: center;
        }
        .data-block .data-num {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .data-block .data-num span {
            color: #60A5FA;
            font-size: 0.6em;
            font-weight: 600;
            margin-left: 2px;
        }
        .data-block .data-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
        }
        .data-block .data-bar {
            height: 4px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 2px;
            margin-top: 12px;
            overflow: hidden;
        }
        .data-block .data-bar .bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), #60A5FA);
            border-radius: 2px;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }
        .faq-item {
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: #CBD5E1;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--dark-navy);
            text-align: left;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }
        .faq-question .faq-icon svg {
            width: 16px;
            height: 16px;
            color: var(--primary);
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-question .faq-icon svg {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--body-text);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }
        .cta-section {
            background: var(--dark-navy);
            border-radius: var(--radius-card);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(37, 99, 235, 0.3) 0%, transparent 60%), radial-gradient(ellipse at 70% 50%, rgba(96, 165, 250, 0.2) 0%, transparent 50%);
            pointer-events: none;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: clamp(24px, 2.6vw, 34px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .cta-section p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 13px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 15px;
            transition: var(--transition-base);
            outline: none;
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .cta-form input:focus {
            border-color: #60A5FA;
            box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.25);
        }
        .cta-form .btn-cta {
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 15px;
            padding: 13px 24px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .cta-form .btn-cta:hover {
            background: #F0F4FF;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
        }
        .site-footer {
            background: var(--dark-navy);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .footer-logo {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo span {
            color: #60A5FA;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition-base);
        }
        .footer-col ul a:hover {
            color: #60A5FA;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-beian {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-beian a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition-base);
        }
        .footer-beian a:hover {
            color: #60A5FA;
        }
        @media (max-width: 1024px) {
            .hero-cat {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-visual {
                aspect-ratio: 16 / 9;
                max-height: 380px;
            }
            .capability-grid .cap-card:first-child {
                grid-template-columns: 1fr;
            }
            .steps-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .steps-row::before {
                display: none;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-btn {
                display: inline-flex;
            }
            .mobile-header-row {
                display: flex !important;
                align-items: center;
                justify-content: space-between;
                height: 64px;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .capability-grid .cap-card:first-child {
                grid-column: 1;
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-row {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .data-strip {
                grid-template-columns: 1fr 1fr;
                padding: 28px 20px;
            }
            .cta-section {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
            .footer-beian {
                justify-content: center;
            }
            .breadcrumb {
                font-size: 13px;
                padding: 16px 0 4px;
            }
            .category-header {
                padding: 20px 0 32px;
            }
            .hero-cat {
                padding: 28px 0 40px;
                gap: 24px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 20px;
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .data-strip {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-form input {
                min-width: 100%;
            }
            .cta-form .btn-cta {
                width: 100%;
            }
            .hero-visual .visual-label {
                font-size: 12px;
                padding: 8px 12px;
                bottom: 12px;
                left: 12px;
                right: 12px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }
        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }
        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }
        .category-hero {
            position: relative;
            padding: 64px 0 72px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.88) 0%, rgba(37, 99, 235, 0.72) 100%);
            z-index: 1;
        }
        .category-hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .separator {
            opacity: 0.5;
        }
        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }
        .category-hero-title {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .category-hero-desc {
            font-size: 17px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.88);
            max-width: 640px;
        }
        .section-pad {
            padding: 72px 0;
        }
        .section-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark-navy);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--mid-gray);
            line-height: 1.75;
            max-width: 620px;
            margin-bottom: 36px;
        }
        .capability-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .capability-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            padding: 28px 28px;
            transition: var(--transition-base);
        }
        .capability-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .capability-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 20px;
            font-weight: 700;
        }
        .capability-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .capability-card p {
            font-size: 15px;
            color: var(--body-text);
            line-height: 1.8;
        }
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 28px;
            padding: 16px 20px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            box-shadow: 0 2px 10px rgba(15, 40, 80, 0.03);
        }
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .filter-tag {
            font-size: 14px;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 999px;
            background: var(--cool-gray);
            color: var(--body-text);
            border: 1px solid transparent;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .filter-tag:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .sort-select {
            font-size: 14px;
            padding: 8px 14px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
            color: var(--body-text);
            min-width: 140px;
            transition: var(--transition-base);
        }
        .sort-select:focus {
            outline: 2px solid rgba(37, 99, 235, 0.3);
            outline-offset: 1px;
        }
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .solution-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .solution-card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .solution-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--cool-gray);
        }
        .solution-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .solution-card:hover .solution-card-img img {
            transform: scale(1.04);
        }
        .solution-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .solution-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .solution-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .solution-card p {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .solution-card .card-meta {
            font-size: 13px;
            color: var(--mid-gray);
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .solution-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }
        .solution-card .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 36px;
        }
        .pagination-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border-light);
            background: #fff;
            font-size: 14px;
            font-weight: 600;
            color: var(--body-text);
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .pagination-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .pagination-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .pagination-btn:disabled {
            opacity: 0.4;
            cursor: not-allowed;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .process-step {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--card-shadow);
            position: relative;
            transition: var(--transition-base);
        }
        .process-step:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .process-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
        }
        .process-step h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.7;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--card-shadow);
        }
        .metric-value {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--mid-gray);
            font-weight: 500;
        }
        .compliance-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .compliance-badge {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 12px 24px;
            font-size: 14px;
            font-weight: 600;
            color: var(--dark-navy);
            box-shadow: 0 2px 8px rgba(15, 40, 80, 0.04);
            transition: var(--transition-base);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .compliance-badge:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(15, 40, 80, 0.08);
        }
        .compliance-badge .check-icon {
            color: #10B981;
            font-weight: 700;
        }
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .scene-card {
            background: var(--cool-gray);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 24px 22px;
            transition: var(--transition-base);
        }
        .scene-card:hover {
            background: #fff;
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .scene-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.75;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(15, 40, 80, 0.03);
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark-navy);
            text-align: left;
            transition: var(--transition-base);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--cool-gray);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            transition: transform 0.25s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            font-size: 15px;
            color: var(--body-text);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .cta-section {
            background: linear-gradient(135deg, var(--dark-navy) 0%, #1a2d4f 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center top, rgba(37, 99, 235, 0.25) 0%, transparent 65%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            margin-bottom: 30px;
        }
        .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            padding: 14px 32px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            border: 2px solid var(--primary);
        }
        .btn-cta-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition-base);
        }
        .btn-cta-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-1px);
        }
        .site-footer {
            background: var(--dark-navy);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-logo span {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-beian {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 14px;
            align-items: center;
        }
        .footer-beian a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition-base);
        }
        .footer-beian a:hover {
            color: #fff;
        }
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 18px;
            }
            .solution-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-header-row {
                display: flex !important;
                align-items: center;
                justify-content: space-between;
                height: 64px;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .solution-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .section-pad {
                padding: 48px 0;
            }
            .category-hero {
                padding: 40px 0 48px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-beian {
                justify-content: center;
            }
            .cta-section {
                padding: 48px 0;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .solution-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .category-hero-title {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* 导航样式 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }
        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }
        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }
        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--mid-gray);
            padding: 20px 0 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--mid-gray);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #CBD5E1;
        }
        .breadcrumb .current {
            color: var(--body-text);
            font-weight: 500;
        }
        /* Hero 区域内页 */
        .page-hero {
            position: relative;
            padding: 64px 0 72px;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.92) 0%, rgba(37, 99, 235, 0.78) 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.88) 0%, rgba(37, 99, 235, 0.72) 100%);
            z-index: 1;
        }
        .page-hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .page-hero h1 {
            font-size: clamp(30px, 4vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }
        .page-hero p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            max-width: 680px;
        }
        .page-hero .breadcrumb {
            position: relative;
            z-index: 2;
            padding: 0 0 28px;
            color: rgba(255, 255, 255, 0.75);
        }
        .page-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .page-hero .breadcrumb a:hover {
            color: #fff;
        }
        .page-hero .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-hero .breadcrumb .current {
            color: #fff;
        }
        /* 板块通用 */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--cool-gray);
        }
        .section-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark-navy);
            margin-bottom: 14px;
        }
        .section-sub {
            font-size: 16px;
            line-height: 1.8;
            color: var(--mid-gray);
            max-width: 680px;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head.center {
            text-align: center;
        }
        .section-head.center .section-sub {
            margin: 0 auto;
        }
        /* 卡片 */
        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-light);
            padding: 28px;
            transition: var(--transition-base);
        }
        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            font-size: 16px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--primary);
            transition: var(--transition-base);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }
        .btn-white:hover {
            background: #F0F4FF;
            transform: translateY(-1px);
        }
        /* 标签 */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: 12px;
        }
        .badge-outline {
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--mid-gray);
        }
        /* 成果数据 */
        .stat-number {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--mid-gray);
        }
        /* FAQ */
        .faq-item {
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: #CBD5E1;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            text-align: left;
            font-weight: 600;
            font-size: 16px;
            color: var(--dark-navy);
            gap: 12px;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
        }
        .faq-answer {
            padding: 0 22px 20px;
            font-size: 15px;
            color: var(--body-text);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            transition: transform 0.25s ease;
        }
        /* CTA */
        .cta-section {
            background: var(--dark-navy);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.25) 0%, transparent 70%);
            z-index: 0;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
        }
        .cta-form input {
            flex: 1;
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 15px;
            outline: none;
            transition: var(--transition-base);
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }
        .cta-form input:focus {
            border-color: rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.15);
        }
        /* 页脚 */
        .site-footer {
            background: var(--dark-navy);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-logo span {
            color: #60A5FA;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
        }
        .footer-beian {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .footer-beian a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-beian a:hover {
            color: #fff;
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-desktop {
                gap: 8px;
            }
            .nav-left, .nav-right {
                gap: 16px;
            }
        }
        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-header-row {
                display: flex !important;
                align-items: center;
                justify-content: space-between;
                height: 64px;
            }
            .mobile-header-row .nav-logo {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .section {
                padding: 48px 0;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input, .cta-form .btn-primary {
                width: 100%;
                justify-content: center;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .container {
                padding: 0 16px;
            }
            .card {
                padding: 20px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }

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

        /* 导航样式 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
        }

        .nav-right {
            justify-content: flex-start;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 2px;
        }

        .nav-logo span {
            color: var(--primary);
            font-size: 18px;
            font-weight: 600;
            margin-left: 4px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

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

        .nav-link.active::after {
            width: 100%;
        }

        /* 移动端导航 */
        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }

        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

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

        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-header-row {
            display: none;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        /* 分类头部 */
        .cat-header {
            background: linear-gradient(180deg, #F0F5FF 0%, #F8FAFC 100%);
            padding: 48px 0 40px;
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--mid-gray);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: #94A3B8;
            font-size: 12px;
        }

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

        .cat-header h1 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--dark-navy);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cat-header .cat-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--mid-gray);
            max-width: 720px;
        }

        /* 筛选排序 */
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 32px;
        }

        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-tag {
            padding: 7px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--body-text);
            background: #fff;
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            white-space: nowrap;
        }

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

        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .sort-select {
            padding: 8px 14px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            font-size: 13px;
            color: var(--body-text);
            background: #fff;
            min-width: 140px;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .sort-select:hover,
        .sort-select:focus {
            border-color: var(--primary);
        }

        /* 资源卡片 */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .resource-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .resource-card .card-img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            display: block;
        }

        .resource-card .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .resource-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .resource-card .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--dark-navy);
            margin-bottom: 8px;
        }

        .resource-card .card-excerpt {
            font-size: 14px;
            line-height: 1.7;
            color: var(--mid-gray);
            margin-bottom: 16px;
            flex: 1;
        }

        .resource-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: #94A3B8;
            border-top: 1px solid #F1F5F9;
            padding-top: 14px;
        }

        .resource-card .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition-base);
        }

        .resource-card .card-link:hover {
            gap: 8px;
            text-decoration: underline;
        }

        /* 能力展示 */
        .cap-section {
            padding: 64px 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

        .cap-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }

        .cap-text h2 {
            font-size: clamp(24px, 2.8vw, 32px);
            font-weight: 800;
            line-height: 1.35;
            color: var(--dark-navy);
            margin-bottom: 16px;
        }

        .cap-text p {
            font-size: 16px;
            line-height: 1.85;
            color: var(--mid-gray);
            margin-bottom: 20px;
        }

        .cap-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cap-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--body-text);
            padding: 12px 16px;
            background: var(--cool-gray);
            border-radius: 10px;
            border-left: 3px solid var(--primary);
        }

        .cap-list li::before {
            content: '✓';
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .cap-image-wrapper {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-light);
        }

        .cap-image-wrapper img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* 统计带 */
        .stats-band {
            background: var(--dark-navy);
            padding: 56px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item .stat-number {
            font-size: clamp(28px, 3.5vw, 42px);
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* 流程 */
        .process-section {
            padding: 64px 0;
            background: var(--cool-gray);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 32px;
        }

        .process-step {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px 20px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-light);
            text-align: center;
            position: relative;
            transition: var(--transition-base);
        }

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

        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 12px;
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13px;
            line-height: 1.7;
            color: var(--mid-gray);
        }

        /* FAQ */
        .faq-section {
            padding: 64px 0;
            background: #fff;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: 12px;
            overflow: hidden;
            background: #fff;
            transition: var(--transition-base);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--dark-navy);
            gap: 12px;
            user-select: none;
            transition: var(--transition-base);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            transition: transform 0.25s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            line-height: 1.8;
            color: var(--mid-gray);
        }

        .faq-item.active .faq-answer {
            max-height: 240px;
            padding: 0 20px 16px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--dark-navy) 0%, #1D3A6E 60%, var(--primary-dark) 100%);
            padding: 72px 0;
            color: #fff;
        }

        .cta-inner {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px;
        }

        .cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input {
            flex: 1;
            min-width: 240px;
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 15px;
            transition: var(--transition-base);
        }

        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }

        .cta-form input:focus {
            outline: none;
            border-color: #fff;
            background: rgba(255, 255, 255, 0.18);
        }

        .cta-btn {
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 15px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

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

        /* 页脚 */
        .site-footer {
            background: var(--dark-navy);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .footer-brand .footer-logo span {
            color: #60A5FA;
            font-size: 16px;
            font-weight: 600;
            margin-left: 4px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition-base);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-beian {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-beian a {
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-beian a:hover {
            color: #fff;
        }

        /* 分页 */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin: 32px 0 48px;
            flex-wrap: wrap;
        }

        .pagination .page-btn {
            min-width: 38px;
            height: 38px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
            font-size: 14px;
            font-weight: 500;
            color: var(--body-text);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
            padding: 0 10px;
        }

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

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

        .pagination .page-btn.dots {
            border: none;
            background: none;
            cursor: default;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .resource-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

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

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

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .mobile-header-row {
                display: flex !important;
            }

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

            .mobile-menu {
                display: none;
            }

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

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

            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .cat-header {
                padding: 32px 0 28px;
            }

            .cat-header h1 {
                font-size: 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .stat-item .stat-number {
                font-size: 26px;
            }

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

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

            .cta-form input {
                min-width: 100%;
            }
        }

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

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

            .stat-item .stat-number {
                font-size: 22px;
            }

            .pagination .page-btn {
                min-width: 32px;
                height: 32px;
                font-size: 12px;
                padding: 0 6px;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }

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

        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }

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

        /* 导航样式 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-left {
            justify-content: flex-end;
        }

        .nav-right {
            justify-content: flex-start;
        }

        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
        }

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

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

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

        .nav-link.active::after {
            width: 100%;
        }

        /* 移动端导航 */
        .mobile-header-row {
            display: none;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
        }

        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

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

        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }

        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }

        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 0;
            font-size: 14px;
            color: var(--mid-gray);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--mid-gray);
            transition: var(--transition-base);
        }

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

        .breadcrumb .sep {
            color: #CBD5E1;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* 分类页 Hero */
        .cat-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 72px 0 88px;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.86) 0%, rgba(37, 99, 235, 0.72) 100%);
            z-index: 1;
        }

        .cat-hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .cat-hero-title {
            font-size: clamp(28px, 3.8vw, 44px);
            font-weight: 800;
            line-height: 1.28;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }

        .cat-hero-title .highlight {
            color: #93C5FD;
        }

        .cat-hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            margin-bottom: 28px;
            max-width: 560px;
        }

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

        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }

        .btn-hero-primary:hover {
            background: #F0F4FF;
            transform: translateY(-1px);
        }

        .btn-hero-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 255, 255, 0.65);
            transition: var(--transition-base);
        }

        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        .cat-hero-panel {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .cat-hero-panel-item {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.18);
        }

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

        .cat-hero-panel-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
        }

        /* 通用 section */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background-color: var(--cool-gray);
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(24px, 2.8vw, 36px);
            font-weight: 700;
            line-height: 1.32;
            color: var(--dark-navy);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--mid-gray);
            max-width: 680px;
        }

        /* 行业卡片 */
        .industry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .industry-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            padding: 28px 24px;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .industry-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .industry-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark-navy);
            line-height: 1.4;
        }

        .industry-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--mid-gray);
            flex: 1;
        }

        .industry-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }

        .industry-card .card-link:hover {
            gap: 10px;
        }

        /* 能力卖点 */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .capability-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 22px 20px;
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
        }

        .capability-item:hover {
            border-color: #BBD3FB;
            box-shadow: var(--card-shadow);
        }

        .capability-num {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .capability-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 6px;
        }

        .capability-item p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--mid-gray);
        }

        /* 流程 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            position: relative;
        }

        .process-step {
            text-align: center;
            padding: 24px 16px;
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
        }

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

        .process-step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 12px;
            border-radius: 50%;
            background: var(--dark-navy);
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .process-step:nth-child(even) .process-step-num {
            background: var(--primary);
        }

        .process-step h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 13px;
            line-height: 1.6;
            color: var(--mid-gray);
        }

        .process-arrow {
            display: none;
        }

        /* 数据 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition-base);
        }

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

        .stat-value {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--dark-navy);
            margin-bottom: 4px;
        }

        .stat-desc {
            font-size: 13px;
            color: var(--mid-gray);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--dark-navy);
            transition: var(--transition-base);
            user-select: none;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            transition: var(--transition-base);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--mid-gray);
        }

        /* CTA */
        .cta-section {
            background: var(--dark-navy);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.25);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.15);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(24px, 2.6vw, 34px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.75;
            margin-bottom: 28px;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
        }

        .cta-input {
            flex: 1;
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 15px;
            transition: var(--transition-base);
        }

        .cta-input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }

        .cta-input:focus {
            outline: none;
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.14);
        }

        .btn-cta-submit {
            padding: 14px 28px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            white-space: nowrap;
        }

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

        /* 页脚 */
        .site-footer {
            background: #0B1730;
            padding: 56px 0 24px;
            color: rgba(255, 255, 255, 0.72);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .footer-logo span {
            color: #60A5FA;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-beian {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-beian a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition-base);
        }

        .footer-beian a:hover {
            color: #fff;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }
            .mobile-header-row {
                display: flex;
            }
            .industry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-flow {
                grid-template-columns: repeat(3, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cat-hero-panel {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .industry-grid {
                grid-template-columns: 1fr;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .process-flow {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cat-hero {
                padding: 48px 0 60px;
            }
            .cat-hero-title {
                font-size: 28px;
            }
            .cat-hero-desc {
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .stat-value {
                font-size: 30px;
            }
            .section-title {
                font-size: 22px;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
            }
            .breadcrumb {
                font-size: 12px;
                padding: 10px 0;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EBF1FE;
            --dark-navy: #0F1E3D;
            --cool-gray: #F6F8FC;
            --mid-gray: #64748B;
            --body-text: #334155;
            --border-light: #E6EEF8;
            --card-shadow: 0 8px 30px rgba(15, 40, 80, 0.06);
            --card-shadow-hover: 0 12px 40px rgba(15, 40, 80, 0.12);
            --radius-card: 18px;
            --radius-btn: 10px;
            --transition-base: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'system-ui', '-apple-system', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Arial', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--body-text);
            background-color: #F8FAFC;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 12px rgba(15, 40, 80, 0.04);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .nav-logo {
            flex-shrink: 0;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--dark-navy);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 2px;
        }
        .nav-logo span {
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
            margin-left: 2px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            padding: 4px 0;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }
        .mobile-header-row {
            display: none;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            border: 1px solid var(--border-light);
            background: #fff;
            transition: var(--transition-base);
        }
        .mobile-menu-btn:hover {
            background: var(--primary-light);
            border-color: var(--primary);
        }
        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
            color: var(--body-text);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 20px 40px rgba(15, 40, 80, 0.06);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 12px 0;
            font-size: 16px;
            border-bottom: 1px solid #F1F5F9;
        }
        .mobile-menu .nav-link:last-child {
            border-bottom: none;
        }
        .btn-primary,
        .btn-secondary,
        .btn-primary-hero {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 16px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            cursor: pointer;
            text-align: center;
            line-height: 1.4;
        }
        .btn-primary,
        .btn-primary-hero {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
        }
        .btn-primary:hover,
        .btn-primary-hero:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-primary-hero {
            background: #fff;
            color: var(--primary-dark);
            border: 1px solid #fff;
            font-weight: 700;
        }
        .btn-primary-hero:hover {
            background: #F0F4FF;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.18);
        }
        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .tag-white {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
        }
        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .stat-label {
            font-size: 14px;
            color: var(--mid-gray);
            font-weight: 500;
        }
        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }
        .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--cool-gray);
        }
        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark-navy);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-desc {
            font-size: 14px;
            color: var(--mid-gray);
            line-height: 1.7;
        }
        .section-title {
            font-size: clamp(26px, 2.6vw, 36px);
            font-weight: 800;
            color: var(--dark-navy);
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--mid-gray);
            line-height: 1.8;
            max-width: 680px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--mid-gray);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .breadcrumb-sep {
            color: #CBD5E1;
            font-size: 12px;
        }
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: 12px;
            background: #fff;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--dark-navy);
            transition: var(--transition-base);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 18px;
            font-weight: 700;
            transition: var(--transition-base);
        }
        .faq-item.open .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 22px;
            font-size: 15px;
            color: var(--mid-gray);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }
        .cta-section {
            background: linear-gradient(135deg, #0F1E3D 0%, #1D4ED8 100%);
            border-radius: 24px;
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .site-footer {
            background: var(--dark-navy);
            color: #B0BED4;
            padding: 56px 0 28px;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .footer-logo span {
            color: #60A5FA;
            font-weight: 700;
            font-size: 16px;
            margin-left: 3px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 380px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: #60A5FA;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 22px;
            font-size: 13px;
            color: #64748B;
        }
        .footer-beian {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 12px;
        }
        .footer-beian a {
            color: #94A3B8;
            transition: var(--transition-base);
        }
        .footer-beian a:hover {
            color: #60A5FA;
        }
        @media (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }
            .mobile-header-row {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .cta-section {
                padding: 40px 28px;
            }
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-title {
                font-size: 24px;
            }
            .stat-number {
                font-size: 32px;
            }
            .cta-section {
                padding: 32px 20px;
                border-radius: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
            .footer-beian {
                justify-content: center;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-left,
            .nav-right {
                gap: 16px;
            }
            .btn-primary,
            .btn-secondary,
            .btn-primary-hero {
                width: 100%;
                justify-content: center;
                font-size: 15px;
                padding: 13px 20px;
            }
        }