/* 极致鲜亮风全局样式定义 */
        :root {
            --primary: #3b82f6; /* 鲜蓝 */
            --primary-gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
            --secondary: #06b6d4; /* 亮青 */
            --accent: #f43f5e; /* 鲜红 */
            --text-dark: #0f172a; /* 深 slate */
            --text-muted: #475569; /* 中 slate */
            --bg-light: #f8fafc; /* 浅灰蓝 */
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 10px 25px -5px rgba(59, 130, 246, 0.1);
            --shadow-lg: 0 20px 40px -10px rgba(59, 130, 246, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        a:hover {
            color: #2563eb;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 按钮通用样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-weight: 600;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: var(--bg-white);
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
            color: var(--bg-white);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: var(--bg-white);
            transform: translateY(-2px);
        }

        /* Section 通用排版 */
        section {
            padding: 90px 0;
            position: relative;
        }

        section:nth-of-type(even) {
            background-color: var(--bg-white);
        }

        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 50px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 50px;
            text-transform: uppercase;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

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

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

        .brand-name {
            font-size: 1.3rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            gap: 24px;
            list-style: none;
        }

        .nav-link {
            color: var(--text-dark);
            font-weight: 500;
            font-size: 0.95rem;
        }

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

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

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-dark);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 首页首屏 (Hero) - 严格不出现任何图片 */
        .hero-section {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
                        var(--bg-white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            background: linear-gradient(90deg, rgba(59, 130, 246, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 24px;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .hero-title-h1 {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            color: var(--text-dark);
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

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

        .hero-description {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 36px;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }

        .hero-btn-official {
            font-size: 1.1rem;
            padding: 14px 36px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4); }
            50% { transform: scale(1.03); box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6); }
            100% { transform: scale(1); box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4); }
        }

        /* 首屏数据指标卡片 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .stat-card {
            background: var(--bg-white);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(59, 130, 246, 0.3);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 6px;
        }

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

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            font-weight: 800;
        }

        .about-p {
            color: var(--text-muted);
            margin-bottom: 18px;
            font-size: 1.05rem;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }

        .about-feat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
        }

        .about-feat-item svg {
            color: var(--secondary);
            flex-shrink: 0;
        }

        .about-image-wrap {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        /* 服务与解决方案卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--bg-white);
            padding: 36px 24px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 24px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 14px;
        }

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

        /* 平台标签云 */
        .platform-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }

        .platform-tag {
            padding: 8px 16px;
            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);
        }

        .platform-tag:hover {
            background: var(--primary);
            color: var(--bg-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* 流程步骤与时间线 */
        .flow-timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }

        .flow-step {
            display: flex;
            margin-bottom: 40px;
            position: relative;
        }

        .flow-step:last-child {
            margin-bottom: 0;
        }

        .flow-num {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
            z-index: 2;
            box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
        }

        .flow-content {
            padding-left: 30px;
            padding-top: 8px;
        }

        .flow-content h4 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .flow-content p {
            color: var(--text-muted);
        }

        /* 对比评测表格 */
        .evaluation-box {
            background: var(--bg-white);
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        .eval-summary {
            display: flex;
            align-items: center;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 20px;
            padding-bottom: 30px;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
        }

        .eval-rating {
            text-align: center;
        }

        .rating-stars {
            color: #fbbf24;
            font-size: 1.8rem;
            margin-bottom: 8px;
        }

        .rating-score {
            font-size: 3rem;
            font-weight: 900;
            color: var(--text-dark);
        }

        .table-responsive {
            overflow-x: auto;
        }

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

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

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

        .compare-table tr:hover {
            background-color: rgba(59, 130, 246, 0.02);
        }

        .highlight-row {
            background-color: rgba(6, 182, 212, 0.05);
            font-weight: 600;
        }

        /* 需求匹配与联系表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 50px;
        }

        .form-card {
            background: var(--bg-white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
            background: var(--bg-light);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }

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

        .info-card {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: var(--bg-white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .info-card h3 {
            font-size: 1.6rem;
            margin-bottom: 24px;
            color: var(--bg-white);
        }

        .info-list {
            list-style: none;
        }

        .info-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .info-item svg {
            color: var(--secondary);
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .qr-item {
            background: var(--bg-white);
            padding: 10px;
            border-radius: 8px;
            text-align: center;
            color: var(--text-dark);
            width: 130px;
        }

        .qr-item img {
            width: 110px;
            height: 110px;
            display: block;
            margin: 0 auto 8px;
        }

        .qr-item span {
            font-size: 0.8rem;
            font-weight: 700;
        }

        /* 常见问题 (FAQ) - 折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .faq-btn {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition);
        }

        .faq-icon-arrow {
            transition: var(--transition);
        }

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

        .faq-content p {
            padding: 20px 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
        }

        .faq-item.active .faq-content {
            max-height: 200px;
        }

        .faq-item.active .faq-icon-arrow {
            transform: rotate(180deg);
        }

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

        .testi-card {
            background: var(--bg-white);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testi-quote {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            position: relative;
        }

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

        .testi-user-info h5 {
            font-weight: 700;
            color: var(--text-dark);
        }

        .testi-user-info span {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* 培训课程板块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow-md);
            transform: scale(1.02);
        }

        .training-card h4 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .training-badge {
            display: inline-block;
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 700;
            background: rgba(6, 182, 212, 0.1);
            color: var(--secondary);
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* 行业资讯 / 知识库 / 百科 */
        .info-articles-grid {
            display: grid;
            grid-template-columns: 1.8fr 1.2fr;
            gap: 40px;
        }

        .articles-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .article-item {
            background: var(--bg-white);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 15px;
            transition: var(--transition);
        }

        .article-item:hover {
            border-color: var(--primary);
            transform: translateX(5px);
        }

        .article-title {
            font-weight: 700;
            color: var(--text-dark);
        }

        .article-link {
            font-size: 0.9rem;
            font-weight: 600;
            white-space: nowrap;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .wiki-card {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
            border: 1px solid rgba(59, 130, 246, 0.15);
            padding: 30px;
            border-radius: 16px;
        }

        .wiki-item {
            margin-bottom: 18px;
        }

        .wiki-item h5 {
            font-weight: 700;
            margin-bottom: 6px;
        }

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

        /* 自助排查卡片 */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .trouble-card {
            background: var(--bg-white);
            padding: 24px;
            border-radius: 12px;
            border-left: 4px solid var(--accent);
            box-shadow: var(--shadow-sm);
        }

        .trouble-card h4 {
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* 价格比价组件 */
        .price-compare-wrapper {
            background: var(--bg-white);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

        /* 悬浮客服面板 */
        .float-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .float-btn:hover {
            background: var(--primary);
            color: var(--bg-white);
            transform: scale(1.1);
        }

        .float-btn-primary {
            background: var(--primary-gradient);
            color: var(--bg-white);
        }

        .float-qr-popover {
            position: absolute;
            bottom: 64px;
            right: 0;
            background: var(--bg-white);
            padding: 16px;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            display: none;
            text-align: center;
            width: 160px;
        }

        .float-qr-popover img {
            width: 128px;
            height: 128px;
            display: block;
            margin-bottom: 8px;
        }

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

        /* 页脚与版权 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            border-top: 1px solid #1e293b;
        }

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

        .footer-logo img {
            max-height: 45px;
            margin-bottom: 20px;
        }

        .footer-title {
            color: var(--bg-white);
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

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

        .footer-links a:hover {
            color: var(--bg-white);
        }

        .friend-links-box {
            grid-column: 1 / -1;
            padding: 20px 0;
            border-top: 1px solid #1e293b;
            border-bottom: 1px solid #1e293b;
        }

        .friend-links-box a {
            color: #64748b;
            margin-right: 15px;
            display: inline-block;
            font-size: 0.85rem;
        }

        .friend-links-box a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            padding-top: 20px;
            font-size: 0.85rem;
        }

        .footer-bottom p {
            color: #64748b;
        }

        /* 移动端响应式调整 */
        @media (max-width: 992px) {
            .hero-title-h1 {
                font-size: 2.3rem;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .contact-grid, .info-articles-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .nav-actions {
                display: none;
            }
            section {
                padding: 60px 0;
            }
            .hero-stats {
                grid-template-columns: 1fr;
            }
            .compare-table th, .compare-table td {
                padding: 10px;
                font-size: 0.85rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }