:root {
            --primary: #5b46f6;
            --primary-light: #ece9ff;
            --secondary: #ff5a1f;
            --accent: #00f2fe;
            --bg-base: #f9f9fb;
            --bg-card: #ffffff;
            --text-main: #1f2937;
            --text-muted: #4b5563;
            --text-light: #9ca3af;
            --border-color: #e5e7eb;
            --container-max-w: 1200px;
            --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 重置样式 */
        * {
            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-base);
            color: var(--text-main);
            line-height: 1.6;
        }
        body {
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: var(--container-max-w);
            margin: 0 auto;
            padding: 0 20px;
        }
        section {
            padding: 80px 0;
            position: relative;
        }
        section:nth-child(even) {
            background-color: #ffffff;
        }

        /* 导航栏 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
            border-bottom: 1px solid var(--border-color);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--text-main);
            font-weight: 800;
            font-size: 20px;
        }
        .ai-page-logo {
            max-width: 130px;
            height: auto;
            display: block;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
        }
        .nav-menu a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition-normal);
            padding: 6px 10px;
            border-radius: 4px;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-btn-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition-normal);
            cursor: pointer;
            border: none;
            outline: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(91, 70, 246, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(91, 70, 246, 0.4);
        }
        .btn-secondary {
            background: linear-gradient(135deg, var(--secondary), #ff7a45);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(255, 90, 31, 0.3);
        }
        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 90, 31, 0.4);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-main);
            border: 2px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }
        .nav-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: var(--transition-normal);
        }

        /* Hero首屏 - 严禁出现任何图片，采用强撞色渐变与排版 */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(91, 70, 246, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(255, 90, 31, 0.08) 0%, transparent 50%),
                        #ffffff;
            padding: 100px 0 120px;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
            border: 1px solid rgba(91, 70, 246, 0.2);
        }
        .hero h1 {
            font-size: clamp(32px, 5vw, 54px);
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 20px;
            font-weight: 900;
            letter-spacing: -1px;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero p {
            font-size: clamp(16px, 2vw, 19px);
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 35px;
            line-height: 1.7;
        }
        .hero-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }
        .hero-cta .btn {
            padding: 15px 35px;
            font-size: 16px;
        }
        
        /* 核心数据卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 50px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            padding: 30px;
            border-radius: 16px;
            transition: var(--transition-normal);
            text-align: center;
        }
        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: 0 10px 25px rgba(91, 70, 246, 0.08);
        }
        .stat-card h3 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .stat-card h3 span {
            color: var(--secondary);
        }
        .stat-card p {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 统一样式标题 */
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 15px;
            position: relative;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--secondary);
            margin: 15px auto 0;
            border-radius: 2px;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
        }

        /* 平台介绍 & 关于我们 */
        .intro-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .intro-text h3 {
            font-size: 26px;
            color: var(--text-main);
            margin-bottom: 20px;
            font-weight: 700;
        }
        .intro-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.8;
            font-size: 15px;
        }
        .feature-bullets {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }
        .bullet-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }
        .bullet-item i {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--secondary);
            border-radius: 50%;
        }

        /* 标签云组件 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            background: var(--bg-base);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }
        .tag-cloud h4 {
            width: 100%;
            font-size: 16px;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .tag-item {
            font-size: 12px;
            font-weight: 600;
            background: #ffffff;
            color: var(--primary);
            padding: 6px 14px;
            border-radius: 50px;
            border: 1px solid var(--border-color);
            transition: var(--transition-normal);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 35px;
            transition: var(--transition-normal);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--primary);
            transform: scaleX(0);
            transition: var(--transition-normal);
            transform-origin: left;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.06);
            border-color: rgba(91, 70, 246, 0.2);
        }
        .service-card:hover::before {
            transform: scaleX(1);
        }
        .service-icon {
            font-size: 40px;
            margin-bottom: 20px;
            display: inline-block;
        }
        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .service-tag {
            font-size: 11px;
            background: var(--bg-base);
            padding: 3px 8px;
            border-radius: 4px;
            color: var(--text-muted);
            border: 1px solid var(--border-color);
        }

        /* 标准化流程 & 时间线 */
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: var(--border-color);
            transform: translateX(-50%);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 50px;
            width: 50%;
            padding: 0 40px;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-badge {
            position: absolute;
            top: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--secondary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            z-index: 2;
        }
        .timeline-item:nth-child(odd) .timeline-badge {
            right: -16px;
        }
        .timeline-item:nth-child(even) .timeline-badge {
            left: -16px;
        }
        .timeline-content {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }
        .timeline-content h4 {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .timeline-content p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 对比评测板块 */
        .comparison-section {
            background-color: var(--bg-base);
        }
        .eval-hero-box {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: linear-gradient(135deg, #0a1931, #15305b);
            color: #ffffff;
            padding: 40px;
            border-radius: 20px;
            margin-bottom: 40px;
            box-shadow: 0 10px 30px rgba(10,25,49,0.2);
            flex-wrap: wrap;
            gap: 20px;
        }
        .eval-info h3 {
            font-size: 24px;
            margin-bottom: 8px;
            color: #ffffff;
        }
        .eval-info p {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }
        .eval-score {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .score-number {
            font-size: 48px;
            font-weight: 900;
            color: var(--accent);
            line-height: 1;
        }
        .score-number span {
            font-size: 20px;
            color: #ffffff;
        }
        .score-stars {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .stars-row {
            color: #ffd700;
            font-size: 24px;
        }
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: #ffffff;
        }
        .comp-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 750px;
        }
        .comp-table th, .comp-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }
        .comp-table th {
            background-color: #f8fafc;
            color: var(--text-main);
            font-weight: 700;
        }
        .comp-table tr:last-child td {
            border-bottom: none;
        }
        .comp-table td strong {
            color: var(--primary);
        }
        .tag-highlight {
            background-color: rgba(91, 70, 246, 0.1);
            color: var(--primary);
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
            font-size: 12px;
        }

        /* Token比价区 */
        .token-pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        .pricing-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            transition: var(--transition-normal);
        }
        .pricing-card:hover {
            border-color: var(--secondary);
            box-shadow: 0 8px 20px rgba(255, 90, 31, 0.08);
            transform: translateY(-3px);
        }
        .pricing-card h4 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .pricing-price {
            font-size: 28px;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 15px;
        }
        .pricing-price span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 400;
        }
        .pricing-features {
            list-style: none;
            font-size: 13px;
            color: var(--text-muted);
            line-height: 2;
        }

        /* 案例展示中心 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            transition: var(--transition-normal);
        }
        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }
        .case-img-wrap {
            width: 100%;
            height: 200px;
            background: #e5e7eb;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-info {
            padding: 24px;
        }
        .case-info h4 {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .case-info p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 15px;
        }
        .case-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
        }
        .case-client {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
        }
        .case-result {
            font-size: 11px;
            background: var(--secondary);
            color: #ffffff;
            padding: 2px 8px;
            border-radius: 4px;
        }

        /* 人工智能与职业技术培训 */
        .training-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .train-card {
            background: #ffffff;
            border: 2px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition-normal);
        }
        .train-card:hover {
            border-color: var(--primary);
            box-shadow: 0 10px 25px rgba(91,70,246,0.06);
        }
        .train-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .train-title span {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
        }
        .train-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .train-meta {
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-light);
        }
        .train-badge {
            background: var(--primary-light);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* 行业资讯 & 最新文章 */
        .news-section {
            background-color: var(--bg-base);
        }
        .news-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        @media(min-width: 768px) {
            .news-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .news-card-featured {
                grid-column: span 2;
            }
        }
        .news-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition-normal);
        }
        .news-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 25px rgba(0,0,0,0.04);
        }
        .news-meta {
            font-size: 12px;
            color: var(--text-light);
            margin-bottom: 10px;
            text-transform: uppercase;
        }
        .news-card h3 {
            font-size: 20px;
            color: var(--text-main);
            margin-bottom: 15px;
            line-height: 1.4;
        }
        .news-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .news-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .news-link:hover {
            color: var(--secondary);
        }
        .article-list {
            list-style: none;
            margin-top: 15px;
        }
        .article-list li {
            padding: 8px 0;
            border-bottom: 1px dashed var(--border-color);
        }
        .article-list li:last-child {
            border-bottom: none;
        }
        .article-list a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 14px;
            transition: var(--transition-normal);
        }
        .article-list a:hover {
            color: var(--primary);
        }

        /* 常见用户问题 FAQ */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition-normal);
        }
        .faq-trigger {
            width: 100%;
            padding: 20px 25px;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            outline: none;
        }
        .faq-icon {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-right: 2px solid var(--text-muted);
            border-bottom: 2px solid var(--text-muted);
            transform: rotate(45deg);
            transition: var(--transition-normal);
            margin-right: 5px;
        }
        .faq-panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafbfc;
        }
        .faq-content {
            padding: 20px 25px 25px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border-color);
        }
        .faq-item.active {
            border-color: var(--primary);
        }
        .faq-item.active .faq-icon {
            transform: rotate(-135deg);
        }
        .faq-item.active .faq-panel {
            max-height: 500px; /* 足够容纳文本的高度 */
        }

        /* 客户评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        .review-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
        }
        .review-card::after {
            content: '“';
            position: absolute;
            top: 20px;
            right: 30px;
            font-size: 64px;
            color: rgba(91,70,246,0.06);
            line-height: 1;
            font-family: Georgia, serif;
        }
        .review-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }
        .author-info h5 {
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 2px;
        }
        .author-info p {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 智能需求匹配与联系我们表单 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 50px;
        }
        @media(min-width: 992px) {
            .contact-layout {
                grid-template-columns: 1.2fr 0.8fr;
            }
        }
        .form-card {
            background: #ffffff;
            border: 2px solid var(--border-color);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }
        .form-title {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 25px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            font-size: 14px;
            border: 2px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-base);
            color: var(--text-main);
            outline: none;
            transition: var(--transition-normal);
        }
        .form-control:focus {
            border-color: var(--primary);
            background-color: #ffffff;
        }
        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }
        .contact-info-panel {
            background: linear-gradient(135deg, var(--primary), #3b2cc4);
            color: #ffffff;
            padding: 40px;
            border-radius: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .contact-info-panel h3 {
            font-size: 24px;
            margin-bottom: 25px;
            color: #ffffff;
        }
        .info-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }
        .info-item-label {
            font-weight: 700;
            font-size: 13px;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 4px;
        }
        .info-item-value {
            font-size: 15px;
            color: rgba(255,255,255,0.9);
        }
        .info-item-value a {
            color: #ffffff;
            text-decoration: none;
        }
        .kefu-qrcode-wrap {
            margin-top: 30px;
            background: rgba(255,255,255,0.1);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .kefu-qrcode-wrap img {
            width: 140px;
            height: 140px;
            border-radius: 8px;
            margin-bottom: 10px;
        }
        .kefu-qrcode-wrap p {
            font-size: 12px;
            color: rgba(255,255,255,0.8);
        }

        /* 宣传图展示网格 */
        .promo-banners {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 15px;
            margin-top: 40px;
        }
        .ai-page-image {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            transition: var(--transition-normal);
        }
        .ai-page-image:hover {
            transform: scale(1.03);
        }

        /* 页脚 */
        footer {
            background-color: #0a1931;
            color: #ffffff;
            padding: 60px 0 30px;
            margin-top: auto;
            border-top: 4px solid var(--secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: var(--accent);
            margin-bottom: 20px;
            font-weight: 700;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition-normal);
        }
        .footer-col a:hover {
            color: #ffffff;
            padding-left: 5px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .copyright {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }
        .friendship-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }
        .friendship-links a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            font-size: 12px;
            transition: var(--transition-normal);
        }
        .friendship-links a:hover {
            color: var(--accent);
        }
        .ai-page-home-link {
            color: var(--secondary) !important;
            font-weight: 700;
        }

        /* 浮动客服入口 */
        .floating-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--secondary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            box-shadow: 0 4px 15px rgba(255, 90, 31, 0.3);
            transition: var(--transition-normal);
            font-weight: 700;
            font-size: 13px;
            border: none;
            cursor: pointer;
        }
        .float-btn:hover {
            transform: scale(1.1);
        }
        .float-btn-wechat {
            background: #07c160;
            box-shadow: 0 4px 15px rgba(7, 193, 96, 0.3);
            position: relative;
        }
        .float-qr-box {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #ffffff;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            border: 1px solid var(--border-color);
            display: none;
            text-align: center;
            width: 140px;
        }
        .float-qr-box img {
            width: 110px;
            height: 110px;
            border-radius: 4px;
        }
        .float-qr-box p {
            color: var(--text-main);
            font-size: 10px;
            margin-top: 5px;
        }
        .float-btn-wechat:hover .float-qr-box {
            display: block;
        }

        /* 响应式调整 */
        @media (max-width: 991px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-btn-group {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .intro-layout {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 50px;
                padding-right: 0;
                text-align: left !important;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-badge {
                left: 4px !important;
                right: auto !important;
            }
        }