/* 变量及重置 */
        :root {
            --primary: #7928ca;
            --secondary: #ff007f;
            --accent: #00f0ff;
            --bg-light: #f8fafc;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --container-w: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 高饱和艳彩渐变背景、文字与边框 */
        .text-gradient {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 50%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .btn-gradient {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 50%, var(--accent) 100%);
            color: #fff !important;
            border: none;
            position: relative;
            z-index: 1;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.3);
        }

        .btn-gradient::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 50%, var(--secondary) 100%);
            z-index: -1;
            opacity: 0;
            transition: var(--transition);
        }

        .btn-gradient:hover::before {
            opacity: 1;
        }

        .btn-gradient:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.4);
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
        }

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

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

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

        .brand span {
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: 0.5px;
        }

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

        nav a {
            text-decoration: none;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
        }

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

        .nav-btn-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 20px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }

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

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

        /* 首屏 Hero - 无图片 */
        .hero {
            padding: 100px 0 80px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 240, 255, 0.08) 0%, rgba(255, 0, 127, 0.05) 50%, transparent 100%), #fff;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(121, 40, 202, 0.15) 0%, transparent 70%);
            top: -50px;
            left: -50px;
            border-radius: 50%;
            filter: blur(40px);
        }

        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(121, 40, 202, 0.1);
            color: var(--primary);
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 24px;
            border: 1px solid rgba(121, 40, 202, 0.2);
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.25;
            margin-bottom: 20px;
            font-weight: 800;
        }

        .hero p.lead {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 35px;
        }

        .hero-btn-container {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        .hero-btn-container .btn {
            padding: 14px 35px;
            font-size: 1.05rem;
            border-radius: 50px;
        }

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

        .stat-card {
            background: #fff;
            padding: 25px 20px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--secondary), var(--primary));
            opacity: 0;
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(121, 40, 202, 0.1);
        }

        .stat-card:hover::after {
            opacity: 1;
        }

        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-card .label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 公用段落标题 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

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

        .intro-content h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .intro-content p {
            margin-bottom: 20px;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .intro-features {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

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

        .intro-feat-item svg {
            width: 20px;
            height: 20px;
            color: var(--secondary);
            flex-shrink: 0;
            margin-top: 3px;
        }

        .intro-feat-item div h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 5px;
        }

        .intro-feat-item div p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

        .intro-side-card {
            background: linear-gradient(135deg, rgba(121, 40, 202, 0.05) 0%, rgba(255, 0, 127, 0.05) 100%);
            border: 2px solid var(--border-color);
            padding: 40px 30px;
            border-radius: 24px;
            text-align: center;
        }

        .intro-side-card h4 {
            font-size: 1.4rem;
            margin-bottom: 15px;
        }

        .intro-side-card .highlight {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary);
            display: block;
            margin-bottom: 20px;
        }

        /* 平台服务 - 模型聚合展示 */
        .model-cloud-container {
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .model-tag {
            padding: 8px 18px;
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-dark);
            transition: var(--transition);
            cursor: default;
        }

        .model-tag:hover {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
            color: #fff;
            border-color: transparent;
            transform: scale(1.05);
        }

        /* 一站式创作服务卡片 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border-radius: 20px;
            background: linear-gradient(135deg, rgba(255, 0, 127, 0.03) 0%, rgba(0, 240, 255, 0.03) 100%);
            z-index: -1;
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(121, 40, 202, 0.08);
            border-color: rgba(121, 40, 202, 0.3);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(255, 0, 127, 0.1) 0%, rgba(121, 40, 202, 0.1) 100%);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .card-icon svg {
            width: 24px;
            height: 24px;
        }

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

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

        /* 解决方案 - 图文排版 */
        .solution-section {
            background: #fff;
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            align-items: center;
        }

        .solution-images {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .solution-img-wrapper {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            border: 1px solid var(--border-color);
        }

        .solution-img-wrapper img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition);
        }

        .solution-img-wrapper:hover img {
            transform: scale(1.02);
        }

        .solution-text h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .solution-text ul {
            list-style: none;
            margin-top: 20px;
        }

        .solution-text ul li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-size: 1rem;
            color: var(--text-muted);
        }

        .solution-text ul li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--accent);
            background: var(--primary);
            width: 18px;
            height: 18px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-weight: 800;
            color: #fff;
        }

        /* 标准化流程步骤 */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            border-radius: 16px;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(121, 40, 202, 0.2);
        }

        .step-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* 对比评测表格 */
        .compare-table-container {
            background: #fff;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            overflow-x: auto;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

        table.compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        table.compare-table th, table.compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        table.compare-table th {
            background: #f8fafc;
            font-weight: 700;
            color: var(--text-dark);
        }

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

        table.compare-table .highlight-col {
            background: rgba(121, 40, 202, 0.02);
            font-weight: 600;
        }

        .badge-star {
            display: inline-flex;
            align-items: center;
            gap: 2px;
            color: #ff9800;
            font-weight: 700;
        }

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

        .case-card {
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .case-card:hover {
            box-shadow: 0 15px 35px rgba(0,0,0,0.06);
            transform: translateY(-4px);
        }

        .case-img-container {
            width: 100%;
            height: 240px;
            overflow: hidden;
            background: #f1f5f9;
        }

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

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

        .case-info {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .case-info h4 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            font-weight: 700;
        }

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

        /* Token 比价 */
        .token-pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .price-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px 24px;
            text-align: center;
            position: relative;
        }

        .price-card.popular {
            border-color: var(--secondary);
            box-shadow: 0 10px 25px rgba(255,0,127,0.1);
        }

        .price-card .badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--secondary);
            color: #fff;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
        }

        .price-card h4 {
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .price-card .amount {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .price-card .amount span {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .price-card ul {
            list-style: none;
            text-align: left;
            margin-bottom: 25px;
        }

        .price-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

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

        .train-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px 15px;
            text-align: center;
            transition: var(--transition);
        }

        .train-card:hover {
            border-color: var(--primary);
            box-shadow: 0 10px 20px rgba(121,40,202,0.05);
            transform: translateY(-3px);
        }

        .train-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

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

        /* 客户评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .review-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 25px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.01);
        }

        .review-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
        }

        .review-user h5 {
            font-size: 0.95rem;
            font-weight: 700;
        }

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

        .review-content {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* FAQ折叠面板 */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        details.faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        details.faq-item[open] {
            border-color: var(--primary);
            box-shadow: 0 4px 20px rgba(121,40,202,0.05);
        }

        summary.faq-question {
            padding: 18px 24px;
            font-weight: 700;
            cursor: pointer;
            outline: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        summary.faq-question::-webkit-details-marker {
            display: none;
        }

        summary.faq-question::after {
            content: "+";
            font-size: 1.3rem;
            color: var(--primary);
            font-weight: 600;
            transition: transform 0.2s ease;
        }

        details.faq-item[open] summary.faq-question::after {
            content: "−";
        }

        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid transparent;
        }

        details.faq-item[open] .faq-answer {
            border-top-color: var(--border-color);
        }

        /* 文章与知识库 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .article-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }

        .article-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .article-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 15px;
        }

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

        .article-card a:hover {
            color: var(--secondary);
        }

        /* 需求匹配与联系我们表单 */
        .contact-section {
            background: #fff;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
        }

        .contact-form-container {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 24px;
        }

        .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-color);
            background: #fff;
            border-radius: 8px;
            outline: none;
            font-size: 0.95rem;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(121, 40, 202, 0.15);
        }

        .contact-info-panel {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .info-block h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .info-list {
            margin-bottom: 30px;
        }

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

        .info-item .icon {
            width: 40px;
            height: 40px;
            background: rgba(121, 40, 202, 0.1);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .qr-codes {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

        .qr-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 12px;
            text-align: center;
        }

        .qr-card img {
            width: 100px;
            height: 100px;
            object-fit: cover;
            margin-bottom: 10px;
            border-radius: 4px;
        }

        .qr-card span {
            font-size: 0.8rem;
            font-weight: 700;
            display: block;
        }

        /* 友情链接与页脚 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
        }

        footer a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.5fr;
            gap: 40px;
            border-bottom: 1px solid #334155;
            padding-bottom: 40px;
            margin-bottom: 30px;
        }

        .footer-brand h4 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 15px;
            font-weight: 800;
        }

        .footer-links h4, .footer-friend h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .footer-links ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 10px;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 0.8rem;
        }

        /* 悬浮客服 */
        .sticky-kefu {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .kefu-trigger {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(121,40,202,0.3);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .kefu-trigger:hover {
            transform: scale(1.08);
        }

        .kefu-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            width: 220px;
            text-align: center;
        }

        .kefu-popover.active {
            display: block;
        }

        .kefu-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 10px;
        }

        .kefu-popover p {
            font-size: 0.85rem;
            color: var(--text-dark);
            font-weight: 700;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .card-grid { grid-template-columns: repeat(2, 1fr); }
            .step-timeline { grid-template-columns: repeat(2, 1fr); }
            .token-pricing-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .reviews-grid { grid-template-columns: repeat(2, 1fr); }
            .articles-grid { grid-template-columns: repeat(3, 1fr); }
        }

        @media (max-width: 768px) {
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            nav.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 { font-size: 2.2rem; }
            .intro-grid, .solution-grid, .contact-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .cases-grid { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .reviews-grid { grid-template-columns: 1fr; }
            .articles-grid { grid-template-columns: 1fr; }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }