:root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --secondary: #10b981;
            --accent: #f59e0b;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --container-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 重置样式 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-hover);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        .ai-section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        /* 顶部导航 */
        .ai-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .ai-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }
        .ai-logo-container {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            max-height: 40px;
            width: auto;
        }
        .ai-menu-list {
            display: flex;
            gap: 20px;
        }
        .ai-menu-link {
            font-weight: 500;
            color: var(--text-muted);
            font-size: 15px;
        }
        .ai-menu-link:hover {
            color: var(--primary);
        }
        .ai-nav-btn {
            background-color: var(--primary);
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
        }
        .ai-nav-btn:hover {
            background-color: var(--primary-hover);
        }
        
        /* 移动端菜单开关 */
        .ai-nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }
        .ai-nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 统一标题 */
        .ai-section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }
        .ai-section-tag {
            display: inline-block;
            background-color: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .ai-section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            margin-top: 5px;
        }
        .ai-section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            margin-top: 10px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Hero首屏 - 严格限制：无任何图片与背景图片 */
        .ai-hero {
            padding: 160px 0 100px 0;
            background: linear-gradient(135deg, #eff6ff 0%, #ecfdf5 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .ai-hero-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
            z-index: 10;
        }
        .ai-hero-tag {
            background-color: var(--secondary);
            color: #fff;
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.2);
            animation: pulse 2s infinite;
        }
        .ai-hero-title {
            font-size: 46px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .ai-hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin-bottom: 35px;
            line-height: 1.7;
        }
        .ai-hero-btns {
            display: flex;
            gap: 15px;
            margin-bottom: 50px;
        }
        .ai-btn {
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .ai-btn-primary {
            background-color: var(--primary);
            color: #fff !important;
            box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
        }
        .ai-btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
        }
        .ai-btn-outline {
            background-color: #fff;
            color: var(--text-main) !important;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .ai-btn-outline:hover {
            background-color: var(--bg-light);
            border-color: #cbd5e1;
            transform: translateY(-2px);
        }

        /* 抽象科技感纯 CSS 几何点缀 */
        .ai-hero-deco {
            position: absolute;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
            border-radius: 50%;
            filter: blur(50px);
            z-index: 1;
        }
        .ai-hero-deco-1 { width: 300px; height: 300px; top: -50px; left: -100px; }
        .ai-hero-deco-2 { width: 400px; height: 400px; bottom: -100px; right: -150px; }

        /* 数据指标卡片 */
        .ai-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            width: 100%;
            max-width: 1000px;
            margin-top: 10px;
        }
        .ai-stat-card {
            background-color: #fff;
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .ai-stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        .ai-stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }
        .ai-stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 关于我们与软件介绍 */
        .ai-about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .ai-about-info h3 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 15px;
        }
        .ai-about-desc {
            color: var(--text-muted);
            margin-bottom: 25px;
            font-size: 16px;
            line-height: 1.8;
        }
        .ai-about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }
        .ai-about-feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-main);
            font-weight: 600;
        }
        .ai-about-feature-icon {
            color: var(--secondary);
            font-size: 18px;
        }

        /* 全平台AIGC服务体系 & 标签云 */
        .ai-services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin-bottom: 50px;
        }
        .ai-service-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
        }
        .ai-service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px -3px rgba(0, 0, 0, 0.08);
            border-color: var(--primary);
        }
        .ai-service-icon {
            font-size: 32px;
            margin-bottom: 20px;
            display: inline-block;
        }
        .ai-service-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .ai-service-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        
        /* 标签云 - 支持的 AI 平台 */
        .ai-tagcloud-container {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            text-align: center;
        }
        .ai-tagcloud-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--text-main);
        }
        .ai-tags-wrap {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .ai-tag-item {
            background-color: #fff;
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        .ai-tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: rgba(37, 99, 235, 0.05);
            transform: scale(1.05);
        }

        /* 制作流程 & 时间线 */
        .ai-process-timeline {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 40px;
        }
        .ai-process-timeline::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 50px;
            right: 50px;
            height: 3px;
            background-color: var(--border-color);
            z-index: 1;
        }
        .ai-process-step {
            position: relative;
            z-index: 2;
            text-align: center;
            flex: 1;
            padding: 0 15px;
        }
        .ai-step-num {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background-color: #fff;
            border: 4px solid var(--border-color);
            color: var(--text-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            margin: 0 auto 20px auto;
            transition: var(--transition);
        }
        .ai-process-step:hover .ai-step-num {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.1);
        }
        .ai-step-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .ai-step-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 全行业解决方案 & 服务网络 */
        .ai-solutions-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .ai-solution-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            transition: var(--transition);
        }
        .ai-solution-card:hover {
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.05);
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        .ai-solution-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .ai-solution-desc {
            font-size: 13px;
            color: var(--text-muted);
        }
        .ai-network-wrap {
            margin-top: 40px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            display: flex;
            align-items: center;
            gap: 50px;
        }
        .ai-network-text {
            flex: 1;
        }
        .ai-network-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 15px;
        }
        .ai-network-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .ai-network-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        .ai-network-item {
            font-size: 13px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .ai-network-map {
            flex: 1;
            height: 250px;
            background: linear-gradient(135deg, #eff6ff 0%, #f1f5f9 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            border: 1px dashed var(--primary);
            position: relative;
        }
        .ai-map-dot {
            position: absolute;
            width: 10px;
            height: 10px;
            background-color: var(--secondary);
            border-radius: 50%;
        }
        .ai-map-dot::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background-color: var(--secondary);
            border-radius: 50%;
            animation: pulse 1.5s infinite;
        }
        .ai-dot-1 { top: 30%; left: 45%; }
        .ai-dot-2 { top: 60%; left: 55%; }
        .ai-dot-3 { top: 45%; left: 70%; }

        /* 对比评测 - 突出推荐度 */
        .ai-eval-box {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .ai-eval-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 25px;
            margin-bottom: 25px;
        }
        .ai-eval-score-wrap {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .ai-eval-score {
            font-size: 48px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
        }
        .ai-eval-score-text {
            font-size: 14px;
            color: var(--text-muted);
        }
        .ai-eval-stars {
            color: var(--accent);
            font-size: 24px;
            letter-spacing: 2px;
        }
        .ai-eval-recommend {
            background-color: rgba(245, 158, 11, 0.1);
            color: var(--accent);
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 700;
        }
        
        .ai-table-responsive {
            width: 100%;
            overflow-x: auto;
        }
        .ai-eval-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }
        .ai-eval-table th, .ai-eval-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }
        .ai-eval-table th {
            font-weight: 700;
            color: var(--text-main);
            background-color: var(--bg-light);
        }
        .ai-eval-table tr:hover {
            background-color: rgba(37, 99, 235, 0.02);
        }
        .ai-highlight-col {
            font-weight: 600;
            color: var(--primary);
        }

        /* 案例展示中心 */
        .ai-cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .ai-case-card {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .ai-case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px -10px rgba(0,0,0,0.1);
        }
        .ai-case-img-wrap {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background-color: #f1f5f9;
        }
        .ai-case-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .ai-case-card:hover .ai-case-img {
            transform: scale(1.05);
        }
        .ai-case-content {
            padding: 24px;
        }
        .ai-case-category {
            font-size: 12px;
            font-weight: 700;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .ai-case-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .ai-case-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 培训业务 */
        .ai-train-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }
        .ai-train-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }
        .ai-train-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background-color: var(--primary);
        }
        .ai-train-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }
        .ai-train-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--text-main);
        }
        .ai-train-meta {
            font-size: 12px;
            color: var(--primary);
            background-color: rgba(37, 99, 235, 0.08);
            display: inline-block;
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 15px;
            font-weight: 600;
        }
        .ai-train-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .ai-train-btn {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Token 比价参考 & 价格参考 */
        .ai-token-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .ai-token-list-wrap h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        /* 需求匹配与联系我们表单 */
        .ai-contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }
        .ai-contact-info-wrap {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .ai-contact-info-list {
            margin-bottom: 30px;
        }
        .ai-contact-info-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 25px;
        }
        .ai-contact-icon {
            font-size: 20px;
            color: var(--primary);
            margin-top: 3px;
        }
        .ai-contact-info-text h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 5px;
        }
        .ai-contact-info-text p {
            font-size: 14px;
            color: var(--text-muted);
        }
        .ai-qr-wrap {
            display: flex;
            gap: 30px;
            background-color: #fff;
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }
        .ai-qr-box {
            text-align: center;
            flex: 1;
        }
        .ai-qr-box img {
            width: 100px;
            height: 100px;
            margin: 0 auto 10px auto;
            border: 1px solid var(--border-color);
            padding: 4px;
            background-color: #fff;
        }
        .ai-qr-box span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 600;
            display: block;
        }
        
        .ai-form-box {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }
        .ai-form-group {
            margin-bottom: 20px;
        }
        .ai-form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .ai-form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
        }
        .ai-form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        .ai-form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .ai-form-btn {
            width: 100%;
            border: none;
            padding: 14px;
            font-size: 16px;
            margin-top: 10px;
        }

        /* 帮助中心 & FAQ */
        .ai-faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }
        .ai-faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            background-color: #fff;
            overflow: hidden;
        }
        .ai-faq-btn {
            width: 100%;
            padding: 20px;
            text-align: left;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }
        .ai-faq-btn::after {
            content: '+';
            font-size: 20px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .ai-faq-item.active .ai-faq-btn::after {
            content: '−';
            transform: rotate(180deg);
        }
        .ai-faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
        }
        .ai-faq-content p {
            padding-bottom: 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .ai-faq-item.active .ai-faq-content {
            max-height: 200px;
        }

        /* 常见问题排查与百科 */
        .ai-trouble-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
        }
        .ai-trouble-list h3, .ai-wiki-list h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-main);
        }
        .ai-trouble-card {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 18px;
            margin-bottom: 15px;
        }
        .ai-trouble-title {
            font-weight: 700;
            font-size: 15px;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .ai-trouble-solution {
            font-size: 13px;
            color: var(--text-muted);
        }
        .ai-wiki-item {
            border-bottom: 1px solid var(--border-color);
            padding: 15px 0;
        }
        .ai-wiki-word {
            font-weight: 700;
            font-size: 14px;
            color: var(--primary);
            margin-bottom: 5px;
        }
        .ai-wiki-define {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 客户评论卡片 */
        .ai-comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }
        .ai-comment-card {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
            transition: var(--transition);
        }
        .ai-comment-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
        }
        .ai-comment-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
            font-style: italic;
        }
        .ai-comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
        }
        .ai-comment-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            border: 1px solid var(--border-color);
        }
        .ai-comment-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
        }
        .ai-comment-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 行业资讯 & 知识库 */
        .ai-blog-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }
        .ai-blog-card {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .ai-blog-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        .ai-blog-content {
            padding: 24px;
        }
        .ai-blog-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: block;
        }
        .ai-blog-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .ai-blog-title a {
            color: var(--text-main);
        }
        .ai-blog-title a:hover {
            color: var(--primary);
        }
        .ai-blog-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        /* 页脚 */
        .ai-footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 80px 0 30px 0;
            border-top: 1px solid #1e293b;
        }
        .ai-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 60px;
        }
        .ai-footer-logo-wrap {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .ai-footer-logo-wrap .ai-page-logo {
            filter: brightness(0) invert(1);
        }
        .ai-footer-desc {
            font-size: 13px;
            line-height: 1.6;
        }
        .ai-footer-title {
            color: #f8fafc;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .ai-footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .ai-footer-links a {
            color: #94a3b8;
            font-size: 14px;
        }
        .ai-footer-links a:hover {
            color: #fff;
        }
        .ai-friend-links-wrap {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            margin-top: 30px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }
        .ai-friend-links-wrap span {
            font-size: 13px;
            font-weight: 600;
            color: #e2e8f0;
        }
        .ai-friend-links-wrap a {
            font-size: 13px;
            color: #94a3b8;
        }
        .ai-friend-links-wrap a:hover {
            color: #fff;
        }
        .ai-footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
        }

        /* 侧边悬浮客服栏 */
        .ai-floating-bar {
            position: fixed;
            right: 20px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }
        .ai-float-item {
            width: 48px;
            height: 48px;
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }
        .ai-float-item:hover {
            background-color: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .ai-float-item svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }
        .ai-float-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: #fff;
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            width: 140px;
            text-align: center;
            color: var(--text-main);
        }
        .ai-float-item:hover .ai-float-popover {
            opacity: 1;
            visibility: visible;
        }
        .ai-float-popover img {
            width: 110px;
            height: 110px;
            margin: 0 auto 8px auto;
        }
        .ai-float-popover span {
            font-size: 12px;
            font-weight: 600;
        }

        /* 动画关键帧 */
        @keyframes pulse {
            0% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.05); opacity: 0.8; }
            100% { transform: scale(1); opacity: 1; }
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .ai-stats-grid { grid-template-columns: repeat(2, 1fr); }
            .ai-services-grid { grid-template-columns: repeat(2, 1fr); }
            .ai-solutions-grid { grid-template-columns: repeat(2, 1fr); }
            .ai-train-grid { grid-template-columns: repeat(2, 1fr); }
            .ai-token-grid { grid-template-columns: 1fr; }
            .ai-comments-grid { grid-template-columns: repeat(2, 1fr); }
            .ai-blog-grid { grid-template-columns: repeat(2, 1fr); }
            .ai-footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .ai-nav-toggle { display: block; }
            .ai-menu-list {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            .ai-menu-list.active { display: flex; }
            .ai-hero { padding: 120px 0 60px 0; }
            .ai-hero-title { font-size: 32px; }
            .ai-about-grid { grid-template-columns: 1fr; }
            .ai-process-timeline { flex-direction: column; gap: 40px; }
            .ai-process-timeline::before { display: none; }
            .ai-network-wrap { flex-direction: column; }
            .ai-contact-grid { grid-template-columns: 1fr; }
            .ai-trouble-grid { grid-template-columns: 1fr; }
            .ai-cases-grid { grid-template-columns: 1fr; }
            .ai-footer-grid { grid-template-columns: 1fr; }
            .ai-footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
            .ai-eval-header { flex-direction: column; gap: 15px; align-items: flex-start; }
        }

        @media (max-width: 480px) {
            .ai-stats-grid { grid-template-columns: 1fr; }
            .ai-services-grid { grid-template-columns: 1fr; }
            .ai-solutions-grid { grid-template-columns: 1fr; }
            .ai-train-grid { grid-template-columns: 1fr; }
            .ai-comments-grid { grid-template-columns: 1fr; }
            .ai-blog-grid { grid-template-columns: 1fr; }
            .ai-form-row { grid-template-columns: 1fr; gap: 0; }
        }