/* 基础变量 */
        :root {
            --primary: #7c3aed;
            --primary-hover: #6d28d9;
            --secondary: #ec4899;
            --accent: #f43f5e;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #1e1b4b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --purple-gradient: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
            --purple-soft: rgba(124, 58, 237, 0.05);
            --container-width: 1200px;
        }

        /* 基础重置 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
        }

        body {
            line-height: 1.6;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        ul {
            list-style: none;
        }

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

        /* 统一按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            font-size: 1rem;
        }

        .btn-primary {
            background: var(--purple-gradient);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
        }

        .btn-primary:hover {
            opacity: 0.95;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
        }

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

        .btn-outline:hover {
            background: var(--purple-soft);
            transform: translateY(-2px);
        }

        /* 导航栏 */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
        }

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

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

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

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            background: var(--purple-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-links a {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-main);
        }

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

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

        .nav-toggle span {
            width: 25px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            transition: all 0.3s;
        }

        /* 首屏 Hero 区域 (严禁图片) */
        .hero {
            position: relative;
            padding: 100px 0 80px 0;
            background: radial-gradient(circle at 10% 20%, rgba(124, 58, 237, 0.05) 0%, rgba(236, 72, 153, 0.05) 90.2%);
            overflow: hidden;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: 50%;
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
            transform: translateX(-50%);
            z-index: 0;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            max-width: 850px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(124, 58, 237, 0.1);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.875rem;
            margin-bottom: 20px;
            border: 1px solid rgba(124, 58, 237, 0.2);
        }

        h1.hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        h1.hero-title span {
            background: var(--purple-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 35px;
            line-height: 1.7;
        }

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

        /* 数据指标 */
        .stats-bar {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 60px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

        .stat-item {
            text-align: center;
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            background: var(--purple-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 通用区块样式 */
        .section {
            padding: 80px 0;
            position: relative;
        }

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

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

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 15px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
        }

        /* 网格系统 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        /* 平台服务 & 场景卡片 */
        .service-card {
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .section-light .service-card {
            background: var(--bg-body);
        }
        
        .section:not(.section-light) .service-card {
            background: var(--bg-card);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(124, 58, 237, 0.08);
            border-color: var(--primary);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }

        .service-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }

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

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .tag {
            font-size: 0.75rem;
            padding: 3px 8px;
            background: rgba(124, 58, 237, 0.08);
            color: var(--primary);
            border-radius: 4px;
            font-weight: 500;
        }

        /* 关于我们与平台介绍 */
        .intro-content {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .intro-list-item {
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }

        .intro-list-icon {
            color: var(--primary);
            font-weight: bold;
            font-size: 1.2rem;
            line-height: 1;
        }

        .intro-list-text h4 {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 5px;
            color: var(--text-main);
        }

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

        /* 聚合平台标志墙 */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }

        .model-tag {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-main);
            transition: all 0.2s;
        }

        .model-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

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

        .step-item {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--purple-gradient);
            color: #ffffff;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px auto;
            box-shadow: 0 4px 10px rgba(124,58,237,0.2);
        }

        .step-title {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .step-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--bg-card);
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: var(--purple-soft);
            font-weight: 700;
            color: var(--text-main);
        }

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

        .comparison-table tr.highlight {
            background-color: rgba(124, 58, 237, 0.02);
        }

        .comparison-table td.strong {
            font-weight: 700;
            color: var(--primary);
        }

        .rating-badge {
            display: inline-block;
            padding: 4px 10px;
            background: #fffbeb;
            color: #d97706;
            border: 1px solid #fef3c7;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.9rem;
        }

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

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

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

        .case-img-wrap {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #f1f5f9;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            font-size: 0.75rem;
            color: var(--primary);
            text-transform: uppercase;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .case-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* 智能需求匹配与表单 */
        .form-section {
            background: radial-gradient(circle at 90% 10%, rgba(124, 58, 237, 0.05) 0%, rgba(236, 72, 153, 0.03) 90.2%);
        }

        .form-card {
            background: var(--bg-card);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
            max-width: 800px;
            margin: 0 auto;
        }

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

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
        }

        .form-label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            background-color: var(--bg-body);
            transition: all 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
        }

        textarea.form-control {
            height: 120px;
            resize: vertical;
        }

        /* 价格参考表格 */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .price-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            position: relative;
            transition: all 0.3s;
        }

        .price-card.popular {
            border-color: var(--primary);
            box-shadow: 0 8px 30px rgba(124, 58, 237, 0.1);
        }

        .price-card.popular::before {
            content: '推荐';
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--purple-gradient);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
        }

        .price-name {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

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

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

        .price-features {
            margin-bottom: 30px;
            text-align: left;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .price-features li {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .price-features li::before {
            content: '✓';
            color: var(--primary);
            font-weight: bold;
        }

        /* 常见问题 FAQ (手风琴) */
        .faq-container {
            max-width: 850px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-header {
            width: 100%;
            background: none;
            border: none;
            padding: 20px;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

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

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: var(--purple-soft);
        }

        .faq-content {
            padding: 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .faq-item.active .faq-body {
            max-height: 300px;
        }

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

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

        .comment-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            position: relative;
        }

        .comment-text {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .comment-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--purple-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            border: 2px solid var(--border-color);
        }

        .comment-meta h5 {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-main);
        }

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

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

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 180px;
            transition: all 0.3s;
        }

        .article-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .article-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 15px;
        }

        .article-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* 术语百科与排查 */
        .wiki-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .wiki-block {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
        }

        .wiki-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 20px;
        }

        .wiki-item h5 {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-main);
            margin-bottom: 5px;
        }

        .wiki-item p {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* 联系我们 & 加盟代理 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .contact-method {
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }

        .contact-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .contact-info-text h4 {
            font-weight: 700;
            font-size: 1.05rem;
            margin-bottom: 5px;
            color: var(--text-main);
        }

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

        .qr-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 15px;
        }

        .qr-card img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border: 1px solid var(--border-color);
            border-radius: 8px;
        }

        /* 页脚 */
        .footer {
            background-color: var(--text-main);
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

        .footer-logo-area {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-logo-area p {
            font-size: 0.85rem;
        }

        .footer-links h4 {
            color: #ffffff;
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .footer-links a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

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

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

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

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

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--purple-gradient);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
        }

        .float-btn:hover {
            transform: scale(1.1);
        }

        .float-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            width: 220px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            display: none;
            text-align: center;
            color: var(--text-main);
        }

        .float-popover p {
            font-size: 0.8rem;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .float-popover img {
            width: 100%;
            border-radius: 4px;
        }

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

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .grid-3, .price-grid, .case-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .footer-top {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }

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

            .nav-toggle {
                display: flex;
            }

            .grid-2, .grid-3, .price-grid, .case-grid, .comments-grid, .wiki-grid, .contact-grid {
                grid-template-columns: 1fr;
            }

            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
            }

            h1.hero-title {
                font-size: 2.2rem;
            }

            .steps-container {
                grid-template-columns: 1fr;
            }

            .form-grid {
                grid-template-columns: 1fr;
            }

            .form-group-full {
                grid-column: span 1;
            }

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