:root {
            --primary: #0066ff;
            --primary-light: #e6f0ff;
            --secondary: #00f2fe;
            --dark: #1a202c;
            --gray: #4a5568;
            --light-gray: #f7fafc;
            --border: #e2e8f0;
            --success: #48bb78;
            --warning: #ed8936;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--dark);
            background-color: #ffffff;
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

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

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

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

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 15px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--dark) 30%, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-subtitle {
            text-align: center;
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        /* 顶部导航 */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: all 0.3s;
        }

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

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

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

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            gap: 5px;
            list-style: none;
            align-items: center;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--gray);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
        }

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

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

        .nav-btn {
            padding: 8px 18px;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }

        .nav-btn-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
        }

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

        .nav-btn-solid {
            background: var(--primary);
            color: #fff;
        }

        .nav-btn-solid:hover {
            background: #0052cc;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
            transition: 0.3s;
        }

        /* Hero首屏 - 无图片高亮度鲜活设计 */
        .hero {
            background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 50%, #e6f0ff 100%);
            position: relative;
            padding: 100px 0 80px;
            text-align: center;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 50vw;
            height: 50vw;
            background: radial-gradient(circle, rgba(0,242,254,0.15) 0%, rgba(255,255,255,0) 70%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -10%;
            right: -10%;
            width: 40vw;
            height: 40vw;
            background: radial-gradient(circle, rgba(0,102,255,0.1) 0%, rgba(255,255,255,0) 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--dark);
        }

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

        .hero-desc {
            font-size: 1.2rem;
            color: var(--gray);
            margin-bottom: 35px;
            line-height: 1.7;
        }

        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 45px;
        }

        .btn-hero-primary {
            background: linear-gradient(135deg, var(--primary) 0%, #0052cc 100%);
            color: white;
            padding: 15px 35px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.1rem;
            text-decoration: none;
            box-shadow: 0 10px 20px rgba(0, 102, 255, 0.2);
            transition: all 0.3s;
        }

        .btn-hero-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 25px rgba(0, 102, 255, 0.3);
        }

        .btn-hero-secondary {
            background: white;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 13px 33px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.1rem;
            text-decoration: none;
            transition: all 0.3s;
        }

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

        .hero-features {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

        .hero-feature-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            color: var(--gray);
            font-weight: 500;
        }

        .hero-feature-item svg {
            color: var(--primary);
            width: 20px;
            height: 20px;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stat-card {
            background: white;
            padding: 30px 20px;
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
            text-align: center;
            border: 1px solid var(--border);
            transition: transform 0.3s;
        }

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

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--gray);
            font-weight: 600;
        }

        /* 关于我们 */
        .about-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

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

        .about-text p {
            color: var(--gray);
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }

        .about-feat-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

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

        .about-feat-item p {
            font-size: 0.85rem;
            margin: 0;
        }

        .about-media {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            border: 4px solid #fff;
        }

        .about-media img {
            width: 100%;
            display: block;
            object-fit: cover;
        }

        /* 服务能力与场景卡片 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .service-card {
            background: white;
            border: 1px solid var(--border);
            padding: 35px 25px;
            border-radius: 12px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: 0 10px 25px rgba(0, 102, 255, 0.08);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .service-icon svg {
            width: 26px;
            height: 26px;
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            font-weight: 700;
        }

        .service-card p {
            color: var(--gray);
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .service-link {
            font-size: 0.85rem;
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* 标签云组件 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }

        .cloud-tag {
            background: var(--light-gray);
            color: var(--gray);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 500;
            border: 1px solid var(--border);
        }

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

        .step-item {
            background: white;
            border: 1px solid var(--border);
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(0, 102, 255, 0.3);
        }

        .step-item h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* 对比评测 */
        .comparison-layout {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }

        .score-box {
            background: linear-gradient(135deg, var(--primary) 0%, #0052cc 100%);
            color: white;
            padding: 40px 30px;
            border-radius: 16px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 102, 255, 0.25);
        }

        .score-stars {
            color: #ffd700;
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

        .score-num {
            font-size: 4rem;
            font-weight: 900;
            line-height: 1;
            margin-bottom: 10px;
        }

        .score-total {
            font-size: 1rem;
            opacity: 0.8;
            margin-bottom: 20px;
        }

        .comparison-table-wrapper {
            background: white;
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.9rem;
            min-width: 500px;
        }

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

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

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

        .badge-highlight {
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: bold;
        }

        /* 案例展示 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: white;
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.3s;
        }

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

        .case-img-container {
            width: 100%;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--light-gray);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-cat {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }

        .case-info h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }

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

        /* 价格比价与表格 */
        .price-table-wrapper {
            background: white;
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow-x: auto;
            margin-top: 30px;
        }

        .price-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }

        .price-table th,
        .price-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            text-align: center;
        }

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

        .price-table td.align-left,
        .price-table th.align-left {
            text-align: left;
        }

        .price-table tr:hover {
            background-color: rgba(0, 102, 255, 0.01);
        }

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

        .train-card {
            background: white;
            border: 1px solid var(--border);
            padding: 25px 15px;
            border-radius: 10px;
            text-align: center;
            transition: all 0.3s;
        }

        .train-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: 0 8px 20px rgba(0, 102, 255, 0.05);
        }

        .train-badge {
            background: #fff3e0;
            color: #e65100;
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 20px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 15px;
        }

        .train-card h3 {
            font-size: 1rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .train-card p {
            font-size: 0.8rem;
            color: var(--gray);
        }

        /* 自助排查与百科 */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .helper-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .helper-item {
            background: white;
            border: 1px solid var(--border);
            padding: 20px;
            border-radius: 8px;
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }

        .helper-num {
            background: var(--primary-light);
            color: var(--primary);
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
            font-size: 0.85rem;
        }

        .helper-content h4 {
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .helper-content p {
            font-size: 0.85rem;
            color: var(--gray);
        }

        .encyclopedia-card {
            background: white;
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 12px;
        }

        .encyclopedia-card h3 {
            font-size: 1.25rem;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 10px;
        }

        .term-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .term-item dt {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--primary);
        }

        .term-item dd {
            font-size: 0.85rem;
            color: var(--gray);
            margin-left: 0;
            margin-top: 3px;
        }

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

        .faq-item {
            background: white;
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-header {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
            font-weight: 600;
            font-size: 0.95rem;
            background: #fff;
            transition: background 0.3s;
        }

        .faq-header:hover {
            background: var(--light-gray);
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s;
            color: var(--primary);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #fafafa;
        }

        .faq-content {
            padding: 20px 24px;
            font-size: 0.9rem;
            color: var(--gray);
            line-height: 1.7;
            border-top: 1px solid var(--border);
        }

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

        .faq-item.active .faq-body {
            max-height: 200px; /* 足够容纳文本的高度 */
        }

        /* 评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background: white;
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 12px;
            position: relative;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        .review-quote {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 20px;
            line-height: 1.7;
            position: relative;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-avatar-text {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: bold;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
        }

        .review-meta h4 {
            font-size: 0.9rem;
            margin-bottom: 2px;
        }

        .review-meta p {
            font-size: 0.75rem;
            color: var(--gray);
        }

        /* 资讯与链接 */
        .news-links-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .news-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: white;
            border: 1px solid var(--border);
            padding: 15px 20px;
            border-radius: 8px;
            text-decoration: none;
            transition: all 0.3s;
        }

        .news-item:hover {
            border-color: var(--primary);
            transform: translateX(3px);
        }

        .news-title {
            font-size: 0.9rem;
            color: var(--dark);
            font-weight: 500;
        }

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

        /* 智能匹配与加盟代理板块 */
        .action-columns {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
        }

        .form-card {
            background: white;
            border: 1px solid var(--border);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px 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 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            color: var(--dark);
            outline: none;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
        }

        .btn-submit {
            background: var(--primary);
            color: white;
            border: none;
            width: 100%;
            padding: 14px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.3s;
        }

        .btn-submit:hover {
            background: #0052cc;
        }

        .agent-card {
            background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
            color: white;
            padding: 40px;
            border-radius: 16px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .agent-info h3 {
            font-size: 1.6rem;
            margin-bottom: 15px;
            color: #fff;
        }

        .agent-info p {
            font-size: 0.95rem;
            opacity: 0.85;
            margin-bottom: 25px;
            line-height: 1.8;
        }

        .agent-perks {
            list-style: none;
            margin-bottom: 30px;
        }

        .agent-perks li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 0.9rem;
        }

        .agent-perks svg {
            color: var(--secondary);
            flex-shrink: 0;
            width: 18px;
            height: 18px;
        }

        /* 页面脚部 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 80px 0 30px;
            font-size: 0.85rem;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-info .logo-text {
            color: white;
            font-size: 1.4rem;
            margin-bottom: 15px;
        }

        .footer-info p {
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .footer-links h4 {
            color: white;
            font-size: 1rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

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

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

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: white;
        }

        .qr-box {
            display: flex;
            gap: 15px;
            align-items: center;
            background: #1e293b;
            padding: 15px;
            border-radius: 8px;
            border: 1px solid #334155;
        }

        .qr-box img {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: 4px;
        }

        .qr-text {
            font-size: 0.8rem;
            line-height: 1.5;
        }

        .qr-text strong {
            color: white;
            display: block;
            margin-bottom: 4px;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-bottom-links {
            display: flex;
            gap: 15px;
        }

        .footer-bottom-links a {
            color: #64748b;
            text-decoration: none;
        }

        .footer-bottom-links a:hover {
            color: #94a3b8;
        }

        /* 浮动客服 */
        .float-bar {
            position: fixed;
            right: 25px;
            bottom: 25px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 50px;
            height: 50px;
            background: white;
            border-radius: 50%;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: all 0.3s;
            border: 1px solid var(--border);
        }

        .float-item:hover {
            background: var(--primary);
            color: white;
        }

        .float-item:hover svg {
            color: white;
        }

        .float-item svg {
            width: 24px;
            height: 24px;
            color: var(--primary);
        }

        .float-popover {
            position: absolute;
            right: 65px;
            bottom: 0;
            background: white;
            border: 1px solid var(--border);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
            color: var(--dark);
        }

        .float-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
            display: block;
            margin-left: auto;
            margin-right: auto;
        }

        .float-popover p {
            font-size: 0.8rem;
            margin: 0;
        }

        .float-item:hover .float-popover {
            display: block;
        }

        /* 首页链接样式 */
        .ai-page-home-link {
            font-weight: 700;
            color: var(--primary) !important;
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                margin-top: -20px;
            }
            .grid-3, .case-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-cards {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu, .nav-actions {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-menu.mobile-active {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .about-layout, .comparison-layout, .troubleshoot-grid, .action-columns {
                grid-template-columns: 1fr;
            }
            .grid-3, .case-grid, .reviews-grid, .grid-4, .training-cards, .stats-grid {
                grid-template-columns: 1fr;
            }
            .workflow-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-links-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .workflow-steps {
                grid-template-columns: 1fr;
            }
        }