:root {
            --primary: #E60012;
            --primary-light: #FF3B30;
            --primary-bg: #FFF5F5;
            --dark: #1A1A1A;
            --dark-gray: #2D2D2D;
            --light-gray: #F5F5F7;
            --border-color: #EAEAEA;
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        body {
            font-family: var(--font-main);
            color: var(--dark-gray);
            background-color: #FFFFFF;
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
        }

        .nav-wrapper {
            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;
        }

        .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
        }

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

        .nav-menu a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--dark-gray);
            padding: 5px 10px;
        }

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

        .nav-btn {
            background-color: var(--primary);
            color: #fff !important;
            padding: 8px 18px !important;
            border-radius: 4px;
            font-weight: 600;
            transition: var(--transition);
        }

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

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: var(--transition);
        }

        /* 严禁首屏出现图片的Hero区域 */
        .hero {
            position: relative;
            background: radial-gradient(circle at 80% 20%, #FFF2F2 0%, #FFFFFF 100%);
            padding: 120px 0 100px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(var(--primary-bg) 1px, transparent 0);
            background-size: 24px 24px;
            opacity: 0.7;
            z-index: 1;
        }

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

        .hero-tag {
            display: inline-block;
            background-color: var(--primary-bg);
            color: var(--primary);
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            margin-bottom: 24px;
            border: 1px solid rgba(230, 0, 18, 0.2);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero h1 span {
            color: var(--primary);
            position: relative;
        }

        .hero p {
            font-size: 1.2rem;
            color: var(--dark-gray);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn-main {
            background-color: var(--primary);
            color: #FFFFFF;
            font-weight: 700;
            padding: 15px 35px;
            border-radius: 4px;
            box-shadow: 0 4px 15px rgba(230, 0, 18, 0.3);
        }

        .btn-main:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(230, 0, 18, 0.4);
        }

        .btn-sub {
            background-color: #FFFFFF;
            color: var(--dark);
            border: 1px solid var(--border-color);
            font-weight: 600;
            padding: 15px 35px;
            border-radius: 4px;
        }

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

        /* 顶通数据看板 */
        .hero-stats {
            margin-top: 60px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            box-shadow: var(--shadow);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }

        .stat-label {
            font-size: 0.85rem;
            color: #666;
            margin-top: 5px;
        }

        /* 通用区块样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--dark);
            font-weight: 800;
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }

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

        .section-header p {
            color: #666;
            margin-top: 15px;
            font-size: 1.05rem;
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .about-text p {
            margin-bottom: 15px;
            color: var(--dark-gray);
            font-size: 1.05rem;
        }

        .about-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 25px;
        }

        .about-tag {
            background-color: var(--light-gray);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        .about-features {
            background-color: var(--primary-bg);
            border-left: 4px solid var(--primary);
            padding: 30px;
            border-radius: 0 8px 8px 0;
        }

        .about-feat-item {
            margin-bottom: 20px;
        }

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

        .about-feat-title {
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
            font-size: 1.1rem;
        }

        /* AIGC服务体系 & 模型聚合 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 35px 25px;
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

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

        .service-card h3 {
            font-size: 1.3rem;
            margin: 15px 0 10px 0;
            color: var(--dark);
        }

        .model-list-wrapper {
            margin-top: 50px;
            background-color: var(--light-gray);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 8px;
        }

        .model-list-title {
            font-weight: 700;
            margin-bottom: 20px;
            text-align: center;
            color: var(--dark);
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
        }

        .model-tag {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            color: var(--dark-gray);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .model-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* 制作流程 & 全流程标准化 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            border-radius: 8px;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px auto;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .process-step h4 {
            font-size: 1.15rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 0.9rem;
            color: #666;
        }

        /* 行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .sol-card {
            display: flex;
            gap: 20px;
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .sol-card:hover {
            box-shadow: var(--shadow);
            transform: scale(1.01);
        }

        .sol-icon {
            font-size: 2rem;
            color: var(--primary);
            line-height: 1;
        }

        .sol-content h4 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .sol-content p {
            font-size: 0.95rem;
            color: #666;
        }

        /* 全国服务网络 */
        .network-section {
            background: linear-gradient(135deg, var(--primary-bg) 0%, #FFFFFF 100%);
        }

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

        .network-map-visual {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 40px;
            box-shadow: var(--shadow);
            position: relative;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .network-nodes {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .node-tag {
            background-color: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(230, 0, 18, 0.15);
            padding: 5px 12px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* 技术标准 */
        .standards-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .standard-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 8px;
            border-top: 4px solid var(--dark);
        }

        .standard-card.highlight {
            border-top-color: var(--primary);
        }

        /* 案例展示区 (必须带图) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .case-image-container {
            width: 100%;
            overflow: hidden;
            display: flex;
        }

        .case-image-container img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition);
        }

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

        .case-info {
            padding: 25px;
        }

        .case-info h4 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .case-info p {
            color: #666;
            font-size: 0.95rem;
        }

        /* 对比评测 (表格实现) */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            box-shadow: var(--shadow);
        }

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

        .compare-table th, .compare-table td {
            padding: 18px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table th {
            background-color: var(--light-gray);
            font-weight: 700;
            color: var(--dark);
        }

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

        .compare-table td.highlight-cell {
            background-color: rgba(230, 0, 18, 0.03);
            font-weight: 700;
            color: var(--primary);
        }

        .badge-star {
            color: #FFB300;
            font-size: 1.1rem;
        }

        /* Token 比价 */
        .price-section {
            background-color: var(--primary-bg);
        }

        .token-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .token-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .token-card:hover {
            transform: translateY(-5px);
        }

        .token-card h4 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .token-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .token-features {
            list-style: none;
            font-size: 0.85rem;
            color: #666;
        }

        .token-features li {
            margin-bottom: 8px;
        }

        /* 培训中心 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .train-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 20px 15px;
            text-align: center;
            transition: var(--transition);
        }

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

        .train-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .train-card h4 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .train-card p {
            font-size: 0.8rem;
            color: #666;
        }

        /* FAQ 手风琴 */
        .faq-wrapper {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 6px;
            margin-bottom: 12px;
            background-color: #FFFFFF;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            background-color: #FFFFFF;
            font-weight: 700;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--light-gray);
        }

        .faq-answer-inner {
            padding: 20px;
            color: var(--dark-gray);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
        }

        /* 故障排查与百科 */
        .info-tab-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .info-box {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
        }

        .info-box h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 20px;
            border-left: 4px solid var(--primary);
            padding-left: 15px;
        }

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

        .info-list li {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px dashed var(--border-color);
        }

        .info-list li:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .info-list strong {
            display: block;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .info-list p {
            font-size: 0.9rem;
            color: #666;
        }

        /* 用户评价 */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            position: relative;
        }

        .review-card::after {
            content: '“';
            position: absolute;
            top: 20px;
            right: 30px;
            font-size: 4rem;
            color: rgba(230, 0, 18, 0.05);
            font-family: Georgia, serif;
            line-height: 1;
        }

        .review-meta {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .review-avatar-text {
            width: 45px;
            height: 45px;
            background-color: var(--primary-bg);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .review-user-info h5 {
            font-size: 1rem;
            color: var(--dark);
        }

        .review-user-info span {
            font-size: 0.8rem;
            color: #888;
        }

        .review-content {
            font-size: 0.95rem;
            color: var(--dark-gray);
        }

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

        .news-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 25px;
            transition: var(--transition);
        }

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

        .news-date {
            font-size: 0.8rem;
            color: #999;
            margin-bottom: 10px;
        }

        .news-card h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .news-card p {
            font-size: 0.9rem;
            color: #666;
            margin-bottom: 15px;
        }

        .news-link {
            font-size: 0.9rem;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* 需求匹配与联系我们表单 */
        .form-section {
            background-color: var(--light-gray);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: flex-start;
        }

        .contact-info-panel h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 25px;
        }

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

        .contact-item-icon {
            font-size: 1.2rem;
            color: var(--primary);
            margin-top: 3px;
        }

        .contact-item-detail h5 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 3px;
        }

        .contact-item-detail p {
            color: #666;
            font-size: 0.95rem;
        }

        .qrcode-box {
            margin-top: 30px;
            background: #FFFFFF;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            display: inline-block;
            text-align: center;
        }

        .qrcode-box img {
            width: 150px;
            height: 150px;
            margin-bottom: 10px;
            display: block;
        }

        .qrcode-box span {
            font-size: 0.85rem;
            color: var(--dark);
            font-weight: 600;
        }

        .form-box {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .form-box h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin-bottom: 25px;
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            font-family: inherit;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.15);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231a1a1a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 15px center;
            background-size: 15px;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--primary);
            color: #FFFFFF;
            border: none;
            padding: 14px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }

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

        /* 页脚区域 */
        footer {
            background-color: var(--dark);
            color: #A0A0A0;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
            border-top: 3px solid var(--primary);
        }

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

        .footer-brand h4 {
            color: #FFFFFF;
            font-size: 1.3rem;
            margin-bottom: 20px;
        }

        .footer-brand p {
            line-height: 1.8;
            margin-bottom: 15px;
        }

        .footer-links h5 {
            color: #FFFFFF;
            font-size: 1rem;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: #A0A0A0;
        }

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

        .friend-links-area {
            border-top: 1px solid #2D2D2D;
            padding-top: 25px;
            margin-top: 25px;
        }

        .friend-links-area h6 {
            color: #FFFFFF;
            font-size: 0.85rem;
            margin-bottom: 10px;
        }

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

        .friend-links a {
            color: #888;
            font-size: 0.85rem;
        }

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

        .footer-bottom {
            border-top: 1px solid #2D2D2D;
            padding-top: 25px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 悬浮侧栏 */
        .floating-bar {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

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

        .float-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #FFFFFF;
            padding: 15px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            text-align: center;
        }

        .float-qr img {
            width: 120px;
            height: 120px;
            display: block;
            margin-bottom: 5px;
        }

        .float-qr span {
            color: var(--dark);
            font-size: 0.8rem;
            white-space: nowrap;
        }

        .float-item:hover .float-qr {
            opacity: 1;
            visibility: visible;
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3, .training-grid, .review-grid, .news-grid, .standards-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #FFFFFF;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .about-grid, .network-wrapper, .form-grid, .info-tab-grid, .case-grid {
                grid-template-columns: 1fr;
            }
            .process-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3, .training-grid, .review-grid, .news-grid, .standards-container {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-stats {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }