:root {
            --primary: #0052d9; /* 宝蓝主色 */
            --primary-light: #eef5ff;
            --primary-hover: #003eb3;
            --accent: #00c2ff; /* 明艳青蓝 */
            --text-dark: #1d2129; /* 深灰黑正文 */
            --text-muted: #86909c; /* 辅助灰色 */
            --bg-light: #f4f7fc; /* 页面基底浅色 */
            --bg-white: #ffffff;
            --border-color: #e5e6eb;
            --success: #00b42a;
            --warning: #ff7d00;
            --shadow-sm: 0 2px 8px rgba(0, 82, 217, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 82, 217, 0.08);
            --shadow-lg: 0 16px 32px rgba(0, 82, 217, 0.12);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* 统一布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 统一段落/模块间距 */
        section {
            padding: 80px 0;
            background-color: var(--bg-white);
        }
        
        section:nth-of-type(even) {
            background-color: var(--bg-light);
        }

        .section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title {
            font-size: 2rem;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--accent);
            margin: 8px auto 0;
            border-radius: 2px;
        }

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

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 6px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            border: 2px solid transparent;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--bg-white);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.2);
        }

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

        .btn-secondary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* 导航栏 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            max-height: 45px;
            width: auto;
        }

        .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-item a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 4px;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 24px;
            height: 18px;
            background: transparent;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 100%;
            height: 3px;
            background-color: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* 首屏 Hero - 无图片设计，采用纯 CSS 渐变、几何排版与微动效 */
        .hero-section {
            background: linear-gradient(135deg, #eef5ff 0%, #ffffff 50%, #e6f0ff 100%);
            padding: 120px 0 90px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0,194,255,0.15) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -5%;
            left: -5%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(0,82,217,0.1) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            background-color: rgba(0, 82, 217, 0.08);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(0, 82, 217, 0.15);
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            color: #0b1d33;
            margin-bottom: 25px;
            font-weight: 800;
        }

        .hero-title span {
            color: var(--primary);
            position: relative;
            background: linear-gradient(120deg, var(--primary) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: #4e5969;
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        /* 核心卖点小卡片在首屏底部平铺 */
        .hero-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .hero-feat-card {
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 8px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            backdrop-filter: blur(5px);
        }

        .hero-feat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(0, 82, 217, 0.3);
        }

        .hero-feat-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .hero-feat-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 5px;
        }

        .hero-feat-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 数据指标卡片 (2. 关于我们 / 平台介绍) */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-text-area h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .intro-text-area p {
            color: #4e5969;
            margin-bottom: 15px;
            font-size: 1rem;
            line-height: 1.7;
        }

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

        .stat-card {
            background-color: var(--bg-light);
            padding: 25px;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 5px;
        }

        .stat-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 服务能力卡片 (3. 全平台AIGC服务) */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 30px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }

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

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(0, 82, 217, 0.15);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .service-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 15px;
            line-height: 1.6;
        }

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

        .service-tag {
            font-size: 0.75rem;
            background-color: var(--bg-light);
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 500;
        }

        /* 聚合模型展示 (3. 支持AI平台) */
        .platforms-section {
            background-color: #f7f9fc;
            padding: 60px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .platform-flow {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .platform-tag {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #4e5969;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .platform-tag:hover {
            color: var(--primary);
            border-color: var(--primary);
            transform: scale(1.05);
        }

        /* 一站式AIGC制作 (4. 一站式AIGC制作) */
        .one-stop-container {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
        }

        .one-stop-features {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .one-stop-item {
            display: flex;
            gap: 15px;
            background: var(--bg-light);
            padding: 20px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .one-stop-item:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-md);
            transform: translateX(5px);
        }

        .one-stop-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
        }

        .one-stop-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 5px;
        }

        /* 全行业解决方案 (5. 全行业解决方案) */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .solution-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 24px;
            transition: var(--transition);
            text-align: center;
        }

        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .solution-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        /* 全国服务网络 (6. 全国服务网络) */
        .network-section {
            background-color: var(--bg-light);
        }

        .network-layout {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .network-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .network-item {
            background-color: var(--bg-white);
            padding: 15px;
            border-radius: 6px;
            border-left: 3px solid var(--accent);
            box-shadow: var(--shadow-sm);
        }

        .network-city {
            font-weight: 700;
            color: var(--text-dark);
            font-size: 0.95rem;
        }

        .network-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 标准化AIGC流程 (7. 标准化AIGC流程 & 8. 技术标准) */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 25px 20px;
            border-radius: 8px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-badge {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--primary);
            color: var(--bg-white);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .step-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 客户案例中心 (9. 客户案例中心) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--bg-white);
            border-radius: 10px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 20px;
        }

        .case-tag {
            font-size: 0.75rem;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }

        .case-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .case-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 对比评测 (10. 对比评测) */
        .eval-section {
            background-color: var(--bg-light);
        }

        .eval-container {
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            gap: 40px;
            align-items: center;
        }

        .score-box {
            background: linear-gradient(135deg, var(--primary) 0%, #003eb3 100%);
            color: var(--bg-white);
            padding: 40px;
            border-radius: 12px;
            text-align: center;
            box-shadow: var(--shadow-lg);
        }

        .score-box h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .score-num {
            font-size: 4.5rem;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 5px;
        }

        .score-stars {
            font-size: 1.8rem;
            color: #ffc107;
            margin-bottom: 15px;
        }

        .score-desc {
            font-size: 0.9rem;
            opacity: 0.9;
        }

        .compare-table-wrapper {
            background-color: var(--bg-white);
            border-radius: 10px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }

        .compare-table th {
            background-color: #fafbfe;
            font-weight: 700;
            color: var(--text-dark);
        }

        .compare-table tr:last-child td {
            border-bottom: none;
        }

        .compare-table td span.tag-best {
            background-color: rgba(0, 180, 42, 0.1);
            color: var(--success);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* Token比价参考 (12. Token比价参考) */
        .token-price-wrapper {
            margin-top: 40px;
        }

        .price-tag-new {
            background: linear-gradient(135deg, #fff0e6 0%, #ffece0 100%);
            border: 1px solid #ff7d00;
            color: #ff7d00;
            font-weight: 700;
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.75rem;
            margin-left: 5px;
        }

        /* 职业技术培训 / 人工智能培训 (13. 职业技术培训 & 14. 人工智能培训) */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .training-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 24px 16px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .training-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .training-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .training-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .training-cert {
            font-size: 0.75rem;
            color: #ff7d00;
            background-color: #fff7e8;
            padding: 2px 6px;
            border-radius: 4px;
            display: inline-block;
        }

        /* 客户评论卡片 (用户评论) */
        .reviews-section {
            background-color: var(--bg-light);
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 25px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .review-card:hover {
            box-shadow: var(--shadow-md);
        }

        .review-rating {
            color: #ffc107;
            margin-bottom: 15px;
        }

        .review-content {
            font-size: 0.9rem;
            color: #4e5969;
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .author-info h5 {
            font-size: 0.9rem;
            font-weight: 700;
        }

        .author-info p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 智能需求匹配与表单 (11. 智能需求匹配 & 20. 联系我们 & 21. 加盟代理) */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info-area {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .contact-info-card {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 8px;
        }

        .contact-qr-wrap {
            display: flex;
            gap: 20px;
            align-items: center;
            margin-top: 15px;
        }

        .contact-qr-img {
            width: 100px;
            height: 100px;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-white);
            padding: 5px;
        }

        .form-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 40px;
            box-shadow: var(--shadow-md);
        }

        .form-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--primary);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 10px 16px;
            font-size: 0.9rem;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
        }

        textarea.form-control {
            height: 100px;
            resize: vertical;
        }

        /* 帮助中心 & FAQ & 自助排查 & 百科 (15. 帮助中心, 16. 常见用户问题 FAQ, 17. 常见问题自助排查, 18. AI术语百科) */
        .help-layout {
            display: grid;
            grid-template-columns: 1.8fr 1fr;
            gap: 40px;
        }

        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            background-color: var(--bg-white);
            border-radius: 6px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 18px 20px;
            background-color: #fafbfe;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            user-select: none;
        }

        .faq-header::after {
            content: '+';
            font-size: 1.2rem;
            color: var(--primary);
            font-weight: 700;
            transition: var(--transition);
        }

        .faq-item.active .faq-header::after {
            content: '-';
            transform: rotate(180deg);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            padding: 0 20px;
            background-color: var(--bg-white);
            color: #4e5969;
            font-size: 0.9rem;
        }

        .faq-item.active .faq-body {
            max-height: 500px;
            padding: 18px 20px;
            border-top: 1px solid var(--border-color);
        }

        .troubleshoot-box {
            background-color: #fff7e8;
            border: 1px solid #ffe4ba;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 25px;
        }

        .troubleshoot-title {
            color: #ff7d00;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }

        .encyclopedia-box {
            background-color: var(--primary-light);
            border: 1px solid #d6e4ff;
            padding: 25px;
            border-radius: 8px;
        }

        .encyclopedia-title {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 12px;
        }

        .term-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 0.85rem;
        }

        .term-item strong {
            color: var(--primary);
        }

        /* 行业资讯 / 知识库 (19. 行业资讯 / 知识库) */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .news-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 25px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .news-title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .news-title a {
            text-decoration: none;
            color: var(--text-dark);
            transition: var(--transition);
        }

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

        /* 页脚与友情链接 */
        footer {
            background-color: #0b1d33;
            color: #d8e5f5;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: 4px solid var(--primary);
        }

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

        .footer-logo-area {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-logo-area img {
            max-height: 45px;
            width: auto;
            align-self: flex-start;
        }

        .footer-title {
            color: var(--bg-white);
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

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

        .footer-links a {
            color: #a3b8cc;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }

        .friend-links {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 25px;
            margin-bottom: 25px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .friend-links-title {
            color: var(--bg-white);
            font-weight: 600;
            font-size: 0.85rem;
        }

        .friend-links a {
            color: #a3b8cc;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: var(--accent);
        }

        .copyright-area {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: #70889f;
        }

        /* 浮动客服入口 */
        .floating-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary-hover);
            transform: scale(1.05);
        }

        .float-btn-text {
            font-size: 0.8rem;
            font-weight: 600;
            text-align: center;
            line-height: 1.2;
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            display: none;
            flex-direction: column;
            align-items: center;
            width: 150px;
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

        .qr-popover p {
            color: var(--text-dark);
            font-size: 0.75rem;
            text-align: center;
        }

        .float-btn:hover .qr-popover {
            display: flex;
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .hero-features {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid, .cases-grid, .reviews-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-md);
                border-top: 1px solid var(--border-color);
                gap: 10px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-features {
                grid-template-columns: 1fr;
            }
            .intro-grid, .one-stop-container, .network-layout, .eval-container, .contact-layout, .help-layout {
                grid-template-columns: 1fr;
            }
            .services-grid, .cases-grid, .reviews-grid, .news-grid, .training-grid {
                grid-template-columns: 1fr;
            }
            .process-flow {
                grid-template-columns: 1fr;
            }
            .solution-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .nav-actions {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }