:root {
            --primary: #0A58CA;
            --primary-hover: #084ab0;
            --accent: #00D2FF;
            --dark: #0f172a;
            --light: #F8FAFC;
            --gray: #64748B;
            --border: #E2E8F0;
            --bg-gradient: linear-gradient(135deg, #0A58CA 0%, #0052D4 50%, #4364F7 100%);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

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

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

        .ai-nav-links {
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .ai-nav-item {
            font-size: 14px;
            font-weight: 500;
            color: var(--dark);
        }

        .ai-nav-item:hover {
            color: var(--primary);
        }

        .ai-btn-nav {
            background: var(--primary);
            color: #fff;
            padding: 8px 18px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
        }

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

        /* 汉堡菜单 (移动端) */
        .ai-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

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

        /* Hero首屏 - 宝蓝明艳风，严禁图片，使用纯CSS与几何设计 */
        .ai-hero {
            padding: 160px 0 100px;
            background: var(--bg-gradient);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .ai-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }

        .ai-hero-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(5px);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(255,255,255,0.25);
            animation: fadeIn 1s ease;
        }

        .ai-hero-title {
            font-size: clamp(28px, 5vw, 42px);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            animation: slideUp 0.8s ease;
        }

        .ai-hero-desc {
            font-size: clamp(16px, 2vw, 18px);
            color: rgba(255, 255, 255, 0.9);
            max-width: 800px;
            margin: 0 auto 40px;
            animation: slideUp 1s ease;
        }

        .ai-hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            animation: slideUp 1.2s ease;
        }

        .ai-btn-primary {
            background: #fff;
            color: var(--primary);
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }

        .ai-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
        }

        .ai-btn-outline {
            border: 2px solid rgba(255,255,255,0.8);
            color: #fff;
            padding: 12px 30px;
            border-radius: 8px;
            font-weight: 700;
        }

        .ai-btn-outline:hover {
            background: rgba(255,255,255,0.1);
        }

        /* 基础样式：卡片与区块 */
        .ai-section {
            padding: 80px 0;
            background: #fff;
        }

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

        .ai-sec-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        .ai-sec-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            position: relative;
        }

        .ai-sec-title::after {
            content: '';
            display: block;
            width: 40px;
            height: 4px;
            background: var(--primary);
            margin: 10px auto 0;
            border-radius: 2px;
        }

        .ai-sec-subtitle {
            color: var(--gray);
            font-size: 15px;
        }

        /* 数据指标卡片 */
        .ai-stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .ai-stat-card {
            background: #fff;
            padding: 30px 20px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(10,88,202,0.06);
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
        }

        .ai-stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(10,88,202,0.1);
        }

        .ai-stat-val {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .ai-stat-lbl {
            color: var(--gray);
            font-size: 14px;
        }

        /* 全平台AIGC服务 + 模型聚合 */
        .ai-services-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .ai-service-card {
            background: #fff;
            padding: 30px;
            border-radius: 10px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .ai-service-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 25px rgba(0,0,0,0.05);
        }

        .ai-service-icon {
            font-size: 32px;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .ai-service-name {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .ai-service-desc {
            color: var(--gray);
            font-size: 14px;
        }

        /* 标签云组件 - 聚合平台展示 */
        .ai-platforms-wrap {
            margin-top: 40px;
            background: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border);
        }

        .ai-tag-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .ai-tag {
            background: var(--light);
            color: var(--dark);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .ai-tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* 制作场景与工作流 */
        .ai-workflow-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .ai-workflow-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .ai-step-item {
            display: flex;
            gap: 20px;
        }

        .ai-step-num {
            width: 40px;
            height: 40px;
            background: var(--light);
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
        }

        .ai-step-info h4 {
            margin-bottom: 6px;
            font-size: 16px;
        }

        .ai-step-info p {
            color: var(--gray);
            font-size: 14px;
        }

        .ai-img-placeholder {
            background: #E2E8F0;
            border-radius: 12px;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ai-img-placeholder img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }

        /* 技术标准 */
        .ai-tech-standards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .ai-standard-box {
            background: var(--light);
            padding: 24px;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
        }

        .ai-standard-box h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .ai-standard-box p {
            color: var(--gray);
            font-size: 13px;
        }

        /* 全行业解决方案 & 服务网络 */
        .ai-solution-tabs {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .ai-solution-card {
            background: #fff;
            padding: 25px;
            border-radius: 10px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        .ai-solution-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .ai-solution-card p {
            font-size: 14px;
            color: var(--gray);
        }

        /* 对比评测 - 突出9.9评分与推荐 */
        .ai-rating-banner {
            background: var(--bg-gradient);
            color: #fff;
            border-radius: 12px;
            padding: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 30px;
            margin-bottom: 50px;
        }

        .ai-rating-score {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .ai-score-num {
            font-size: 72px;
            font-weight: 900;
            line-height: 1;
            color: var(--accent);
        }

        .ai-score-stars {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .ai-stars {
            color: var(--accent);
            font-size: 24px;
        }

        .ai-compare-table-wrap {
            overflow-x: auto;
            border: 1px solid var(--border);
            border-radius: 12px;
        }

        .ai-compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
            background: #fff;
        }

        .ai-compare-table th, .ai-compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

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

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

        .ai-highlight-col {
            background: rgba(10, 88, 202, 0.03);
            font-weight: 600;
        }

        /* Token 比价参考 & 价格参考 */
        .ai-price-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .ai-price-card {
            background: #fff;
            border-radius: 10px;
            border: 1px solid var(--border);
            padding: 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .ai-price-card.hot {
            border-color: var(--primary);
            box-shadow: 0 10px 30px rgba(10,88,202,0.08);
        }

        .ai-price-card.hot::before {
            content: "超值首选";
            position: absolute;
            top: 15px;
            right: -30px;
            background: var(--accent);
            color: var(--dark);
            font-size: 11px;
            font-weight: 700;
            padding: 4px 30px;
            transform: rotate(45deg);
        }

        .ai-price-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }

        .ai-price-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin: 20px 0;
        }

        .ai-price-features {
            list-style: none;
            padding: 0;
            margin: 20px 0;
            font-size: 14px;
            color: var(--gray);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .ai-training-card {
            background: var(--light);
            border-radius: 8px;
            padding: 24px;
            border-top: 4px solid var(--primary);
            transition: var(--transition);
        }

        .ai-training-card:hover {
            background: #fff;
            box-shadow: 0 8px 25px rgba(0,0,0,0.05);
            transform: translateY(-2px);
        }

        .ai-training-card h4 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .ai-training-card p {
            font-size: 13px;
            color: var(--gray);
        }

        /* 客户案例中心 */
        .ai-cases-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .ai-case-card {
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

        .ai-case-card:hover {
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

        .ai-case-img {
            height: 200px;
            background: var(--light);
            overflow: hidden;
        }

        .ai-case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .ai-case-info {
            padding: 20px;
        }

        .ai-case-tag {
            font-size: 12px;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: inline-block;
        }

        .ai-case-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .ai-case-desc {
            font-size: 13px;
            color: var(--gray);
        }

        /* 客户评论卡片 */
        .ai-reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .ai-review-card {
            background: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border);
            position: relative;
        }

        .ai-review-quote {
            font-size: 14px;
            color: var(--gray);
            margin-bottom: 20px;
            line-height: 1.6;
        }

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

        .ai-author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: justify-center;
            font-weight: 700;
            font-size: 14px;
            justify-content: center;
        }

        .ai-author-info h4 {
            font-size: 14px;
            font-weight: 700;
        }

        .ai-author-info span {
            font-size: 12px;
            color: var(--gray);
        }

        /* 智能需求匹配与表单 */
        .ai-form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .ai-form-card {
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--border);
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

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

        .ai-form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .ai-form-control {
            width: 100%;
            padding: 10px 14px;
            border-radius: 6px;
            border: 1px solid var(--border);
            font-size: 14px;
            transition: var(--transition);
        }

        .ai-form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(10,88,202,0.1);
        }

        .ai-btn-submit {
            width: 100%;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px;
            border-radius: 6px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
        }

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

        /* FAQ折叠面板 */
        .ai-faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .ai-faq-item {
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
            background: #fff;
        }

        .ai-faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .ai-faq-question::after {
            content: '+';
            font-size: 20px;
            color: var(--primary);
            transition: var(--transition);
        }

        .ai-faq-item.active .ai-faq-question::after {
            transform: rotate(45deg);
        }

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

        .ai-faq-answer-inner {
            padding: 18px 24px;
            font-size: 14px;
            color: var(--gray);
            border-top: 1px solid var(--border);
        }

        /* AI术语百科 & 资讯库 */
        .ai-info-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

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

        .ai-glossary-item h4 {
            font-size: 15px;
            margin-bottom: 4px;
            color: var(--primary);
        }

        .ai-glossary-item p {
            font-size: 13px;
            color: var(--gray);
        }

        .ai-article-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .ai-article-link {
            display: block;
            padding: 14px;
            background: var(--light);
            border-radius: 6px;
            font-size: 14px;
            border-left: 3px solid transparent;
        }

        .ai-article-link:hover {
            border-left-color: var(--primary);
            background: #fff;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

        /* 加盟代理 */
        .ai-join-section {
            background: var(--dark);
            color: #fff;
            padding: 80px 0;
        }

        .ai-join-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .ai-join-badge {
            background: var(--accent);
            color: var(--dark);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 700;
            display: inline-block;
            margin-bottom: 15px;
        }

        .ai-join-list {
            margin: 20px 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .ai-join-list li {
            list-style: none;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-join-list li::before {
            content: "✓";
            color: var(--accent);
            font-weight: 700;
        }

        /* 页脚 */
        .ai-footer {
            background: #0B132B;
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
            font-size: 13px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .ai-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .ai-footer-logo {
            margin-bottom: 15px;
        }

        .ai-footer-title {
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .ai-footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

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

        .ai-footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .ai-friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .ai-friend-links a {
            color: rgba(255,255,255,0.5);
        }

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

        /* 浮动客服 */
        .ai-float-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .ai-float-btn {
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            position: relative;
            font-size: 20px;
            border: none;
            outline: none;
        }

        .ai-float-btn:hover {
            background: var(--primary-hover);
        }

        .ai-qr-popup {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            width: 150px;
            text-align: center;
            color: var(--dark);
        }

        .ai-qr-popup img {
            width: 120px;
            height: 120px;
            object-fit: cover;
            margin-bottom: 6px;
        }

        .ai-qr-popup span {
            font-size: 11px;
            font-weight: 600;
        }

        /* 动画基础 */
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes slideUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 移动端适配 */
        @media (max-width: 992px) {
            .ai-nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }

            .ai-nav-links.active {
                display: flex;
            }

            .ai-menu-toggle {
                display: flex;
            }

            .ai-workflow-grid, .ai-form-layout, .ai-info-layout, .ai-join-grid {
                grid-template-columns: 1fr;
            }

            .ai-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 576px) {
            .ai-footer-grid {
                grid-template-columns: 1fr;
            }
            .ai-rating-banner {
                flex-direction: column;
                align-items: flex-start;
            }
        }