/* 样式复位与变量 */
        :root {
            --primary: #00b4d8;
            --primary-dark: #0077b6;
            --primary-light: #caf0f8;
            --secondary: #06d6a0;
            --text-dark: #1d2d44;
            --text-muted: #6c757d;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --container-width: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-padding {
            padding: 80px 0;
        }

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

        .section-header h2 {
            font-size: 2rem;
            color: var(--text-dark);
            position: relative;
            display: inline-block;
            padding-bottom: 12px;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            margin-top: 15px;
            font-size: 1rem;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            border-radius: 5px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            outline: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 15px rgba(0, 180, 216, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 180, 216, 0.4);
        }

        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary), #05b386);
            color: #fff;
            box-shadow: 0 4px 15px rgba(6, 214, 160, 0.3);
        }

        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(6, 214, 160, 0.4);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary-dark);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        /* 头部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            transition: var(--transition);
        }

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

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

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-link {
            font-size: 0.95rem;
            color: var(--text-dark);
            font-weight: 500;
        }

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

        .nav-btn {
            display: flex;
            gap: 10px;
            align-items: center;
        }

        /* 移动端菜单控制 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 30px;
            height: 3px;
            background-color: var(--text-dark);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* 1. Hero 首屏 - 纯CSS设计，无图片 */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, rgba(202, 240, 248, 0.3) 0%, rgba(248, 249, 250, 1) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 214, 160, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 2.5rem;
            line-height: 1.3;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

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

        .hero-content p {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 30px;
        }

        .hero-actions {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .hero-visual {
            background: rgba(255, 255, 255, 0.8);
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.05);
            border: 1px solid rgba(0, 180, 216, 0.1);
            position: relative;
            backdrop-filter: blur(10px);
        }

        .visual-badge {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 700;
            display: inline-block;
            margin-bottom: 15px;
        }

        .visual-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 20px;
        }

        .stat-box {
            background: var(--bg-light);
            padding: 15px;
            border-radius: 10px;
            text-align: center;
            border: 1px solid rgba(0,0,0,0.02);
        }

        .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-dark);
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 5px;
        }

        /* 2. 关于我们 */
        .about-section {
            background-color: var(--bg-white);
        }

        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            color: var(--primary-dark);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 15px;
            font-size: 0.95rem;
        }

        .about-highlights {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }

        .highlight-item {
            padding: 15px;
            border-left: 4px solid var(--secondary);
            background-color: var(--bg-light);
        }

        .highlight-item h4 {
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .highlight-item p {
            font-size: 0.85rem;
            margin-bottom: 0;
        }

        /* 3. 全平台AIGC服务体系 */
        .service-system {
            background-color: var(--bg-light);
        }

        .model-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .model-tag {
            background-color: var(--bg-white);
            color: var(--text-dark);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(0, 180, 216, 0.1);
            transition: var(--transition);
        }

        .model-tag:hover {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            transform: translateY(-2px);
        }

        /* 4. 全自动AIGC制作流程 & 7. 标准化服务全流程 */
        .process-section {
            background-color: var(--bg-white);
        }

        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline-item {
            display: flex;
            margin-bottom: 40px;
            position: relative;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 30px;
            bottom: -30px;
            width: 2px;
            background-color: var(--primary-light);
        }

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

        .timeline-number {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            flex-shrink: 0;
            z-index: 2;
        }

        .timeline-content {
            padding-left: 30px;
            padding-top: 10px;
        }

        .timeline-content h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }

        .timeline-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 5. 全行业解决方案 */
        .solutions-section {
            background-color: var(--bg-light);
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .solution-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.02);
            transition: var(--transition);
            border-top: 4px solid var(--primary);
        }

        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .solution-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .solution-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

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

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
        }

        .network-text h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .network-text p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 25px;
        }

        .network-map {
            background-color: var(--bg-light);
            border-radius: 15px;
            padding: 30px;
            min-height: 350px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .network-dots {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
        }

        .dot-card {
            background: var(--bg-white);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
            text-align: center;
        }

        .dot-card h4 {
            color: var(--primary-dark);
            margin-bottom: 5px;
        }

        .dot-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 8. 技术标准 */
        .tech-standards {
            background-color: var(--bg-light);
        }

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

        .standard-box {
            background: var(--bg-white);
            padding: 25px;
            border-radius: 10px;
            text-align: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .standard-box .value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 10px;
        }

        .standard-box .label {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 5px;
        }

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

        /* 9. 客户案例中心 */
        .case-center {
            background-color: var(--bg-white);
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .case-card {
            background: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.03);
            border: 1px solid rgba(0,0,0,0.05);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }

        .case-img-wrap {
            position: relative;
            background: #eaeaea;
            overflow: hidden;
        }

        .case-img-wrap img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-tag {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--primary);
            color: #fff;
            padding: 4px 10px;
            font-size: 0.8rem;
            border-radius: 4px;
            font-weight: 600;
        }

        .case-info {
            padding: 20px;
        }

        .case-info h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

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

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

        .comparison-wrapper {
            background: var(--bg-white);
            border-radius: 15px;
            padding: 40px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.03);
        }

        .rating-box {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .rating-score {
            font-size: 3rem;
            font-weight: 900;
            color: var(--primary-dark);
        }

        .rating-stars {
            font-size: 1.5rem;
            color: #ffb703;
        }

        .rating-desc {
            font-size: 1.1rem;
            color: var(--text-dark);
            font-weight: 600;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .comparison-table th, .comparison-table td {
            padding: 15px 20px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .comparison-table th {
            background-color: var(--bg-light);
            font-weight: 700;
            color: var(--text-dark);
        }

        .comparison-table tr:hover {
            background-color: var(--primary-light);
        }

        .comparison-table td.highlight {
            color: var(--primary-dark);
            font-weight: 600;
        }

        /* 11. 智能需求匹配 (表单) */
        .demand-section {
            background-color: var(--bg-white);
        }

        .demand-grid {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 50px;
            align-items: flex-start;
        }

        .demand-info h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .demand-info p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .demand-form {
            background-color: var(--bg-light);
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
            border: 1px solid rgba(0,0,0,0.03);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid rgba(0,0,0,0.1);
            border-radius: 6px;
            background-color: var(--bg-white);
            transition: var(--transition);
            outline: none;
            font-size: 0.95rem;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.15);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        /* 12. Token比价参考 */
        .token-price-section {
            background-color: var(--bg-light);
        }

        /* 13. 职业技术培训 & 14. 人工智能培训 */
        .training-section {
            background-color: var(--bg-white);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background: var(--bg-light);
            border-radius: 10px;
            padding: 25px;
            text-align: center;
            border: 1px solid rgba(0, 0, 0, 0.03);
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            background: var(--bg-white);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            border-color: var(--primary-light);
        }

        .training-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 15px;
        }

        /* 15. 帮助中心 (软件介绍) */
        .help-center {
            background-color: var(--bg-light);
        }

        .intro-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .feature-item {
            background: var(--bg-white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.02);
        }

        .feature-item h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: var(--primary-dark);
        }

        .feature-item p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* 16. 常见用户问题 FAQ */
        .faq-section {
            background-color: var(--bg-white);
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid rgba(0,0,0,0.08);
            padding: 15px 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 10px 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-answer p {
            padding: 10px 0;
        }

        .faq-icon::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-icon::after {
            content: '-';
            transform: rotate(90deg);
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* 17. 常见问题自助排查 & 18. 网站术语百科 */
        .troubleshooting-section {
            background-color: var(--bg-light);
        }

        .trouble-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .trouble-steps h3, .tag-cloud-wrapper h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
        }

        .trouble-list {
            list-style: none;
        }

        .trouble-list li {
            padding: 12px 15px;
            background: var(--bg-white);
            border-radius: 8px;
            margin-bottom: 10px;
            border-left: 4px solid var(--secondary);
            font-size: 0.9rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud span {
            background: var(--bg-white);
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border: 1px solid rgba(0,0,0,0.05);
        }

        /* 客户评论卡片 (6条评论) */
        .testimonials-section {
            background-color: var(--bg-white);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .testimonial-card {
            background: var(--bg-light);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid rgba(0,0,0,0.02);
            position: relative;
        }

        .testimonial-content {
            font-style: italic;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .user-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

        .user-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 19. 行业资讯 / 知识库 */
        .news-section {
            background-color: var(--bg-light);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .news-card {
            background: var(--bg-white);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
        }

        .news-info {
            padding: 20px;
        }

        .news-info h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }

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

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

        .news-info p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 15px;
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* 20. 联系我们 */
        .contact-section {
            background-color: var(--bg-white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .contact-info-list {
            margin-top: 30px;
        }

        .contact-info-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .contact-info-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
        }

        .qr-codes {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }

        .qr-item {
            text-align: center;
            background: var(--bg-light);
            padding: 20px;
            border-radius: 10px;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            margin: 0 auto 10px;
            border-radius: 6px;
        }

        .qr-item p {
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* 页脚 */
        footer {
            background-color: #0b132b;
            color: #8d99ae;
            padding: 60px 0 20px;
            font-size: 0.9rem;
        }

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

        .footer-logo img {
            height: 40px;
            margin-bottom: 15px;
        }

        .footer-links h4, .footer-contact h4 {
            color: #fff;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .footer-links ul {
            list-style: none;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

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

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 15px;
            margin-top: 15px;
        }

        .friend-links a {
            color: #8d99ae;
            font-size: 0.85rem;
        }

        .friend-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 浮动客服入口 */
        .floating-kefu {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            background: var(--bg-white);
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border: 1px solid var(--primary-light);
            transition: var(--transition);
        }

        .floating-kefu:hover {
            transform: scale(1.05);
        }

        .kefu-panel {
            position: absolute;
            bottom: 70px;
            right: 0;
            width: 220px;
            background: var(--bg-white);
            border-radius: 12px;
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
            padding: 20px;
            display: none;
            text-align: center;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .kefu-panel img {
            width: 140px;
            height: 140px;
            margin: 0 auto 10px;
        }

        .kefu-panel p {
            font-size: 0.85rem;
            color: var(--text-dark);
            margin-bottom: 5px;
        }

        .kefu-panel span {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .hero-grid, .about-content, .network-grid, .demand-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero-visual {
                order: -1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .standards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--bg-white);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
                border-top: 1px solid rgba(0,0,0,0.05);
            }

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

            .menu-toggle {
                display: flex;
            }

            .hero-content h1 {
                font-size: 2rem;
            }

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

            .form-row {
                grid-template-columns: 1fr;
                gap: 0;
            }
        }