/* CSS Reset & Variable 定义 */
        :root {
            --primary: #2563eb;
            --primary-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #db2777 100%);
            --secondary-gradient: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --text-light: #ffffff;
            --border-color: #e2e8f0;
            --container-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

        /* 通用容器宽度 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 统一的页面背景语言 */
        main {
            position: relative;
            background: radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.03) 0%, transparent 40%),
                        radial-gradient(circle at 90% 80%, rgba(124, 58, 237, 0.03) 0%, transparent 40%);
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }

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

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .nav-btn {
            background: var(--primary-gradient);
            color: var(--text-light);
            padding: 8px 18px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
            transition: var(--transition);
        }

        .nav-btn:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }

        /* 导航展开按钮(移动端) */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-dark);
            font-size: 24px;
            cursor: pointer;
        }

        /* 通用排版 */
        .section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            padding: 4px 12px;
            border-radius: 9999px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
        }

        /* Hero首屏 - 活力渐变，无图设计 */
        .hero {
            background: linear-gradient(135deg, rgba(37,99,235,0.05) 0%, rgba(219,39,119,0.05) 100%);
            padding: 100px 0 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border-color);
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            margin-bottom: 24px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
        }

        .hero-badge span {
            color: var(--primary);
            font-weight: 700;
        }

        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -1px;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px auto;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: var(--text-light);
            padding: 14px 32px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(37, 99, 235, 0.3);
        }

        .btn-secondary {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-dark);
            padding: 14px 32px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
        }

        .btn-secondary:hover {
            background: var(--bg-light);
            border-color: #cbd5e1;
        }

        /* 浮动与修饰背景（代替首屏图片，强化活力亮彩渐变感） */
        .hero-decor-1 {
            position: absolute;
            top: 20%;
            left: 5%;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }
        
        .hero-decor-2 {
            position: absolute;
            bottom: 10%;
            right: 5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(219, 39, 119, 0.12) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .stats-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .stats-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .stats-num {
            font-size: 36px;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }

        .stats-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

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

        .about-text h3 {
            font-size: 26px;
            margin-bottom: 20px;
            color: var(--text-dark);
        }

        .about-text p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .about-feat-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .about-feat-icon {
            color: var(--primary);
            font-weight: bold;
            font-size: 18px;
        }

        .about-feat-content h4 {
            font-size: 16px;
            margin-bottom: 6px;
        }

        .about-feat-content p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }

        /* 全平台AIGC服务 / 卡片设计 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.05);
            border-color: var(--primary);
        }

        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }

        .service-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .service-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .service-models {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 20px;
        }

        .model-tag {
            font-size: 11px;
            padding: 2px 8px;
            background: var(--bg-light);
            border-radius: 4px;
            color: var(--text-muted);
        }

        .service-link {
            font-size: 14px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* 标签云组件 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 30px;
        }

        .cloud-tag {
            font-size: 13px;
            padding: 6px 14px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 9999px;
            color: var(--text-muted);
            transition: var(--transition);
        }

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

        /* 一站式AIGC制作场景 */
        .scene-tabs-container {
            margin-top: 40px;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .scene-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            transition: var(--transition);
        }

        .scene-card:hover {
            box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

        .scene-name {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .scene-detail {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 全行业解决方案 */
        .solution-row {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

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

        .solution-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
        }

        .solution-item h4 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .solution-item p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 全国服务网络 */
        .network-card {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: var(--text-light);
            border-radius: 16px;
            padding: 40px;
            margin-top: 40px;
        }

        .network-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .network-item h4 {
            color: var(--text-light);
            font-size: 20px;
            margin-bottom: 10px;
        }

        .network-item p {
            color: #94a3b8;
            font-size: 14px;
        }

        /* 标准化AIGC流程 - 时间线 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 2px;
            background-color: var(--border-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -1px;
        }

        .timeline-container {
            padding: 10px 40px;
            position: relative;
            background-color: inherit;
            width: 50%;
        }

        .timeline-container::after {
            content: '';
            position: absolute;
            width: 16px;
            height: 16px;
            right: -8px;
            background-color: var(--bg-card);
            border: 4px solid var(--primary);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }

        .left-timeline {
            left: 0;
        }

        .right-timeline {
            left: 50%;
        }

        .right-timeline::after {
            left: -8px;
        }

        .timeline-content {
            padding: 20px;
            background-color: var(--bg-card);
            position: relative;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .timeline-content h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .timeline-content p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 技术标准 */
        .standard-section {
            background: #ffffff;
            border-radius: 12px;
            padding: 40px;
            border: 1px solid var(--border-color);
            margin-top: 30px;
        }
        
        .standard-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        
        .standard-box h4 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--primary);
        }
        
        .standard-box p {
            font-size: 14px;
            color: var(--text-muted);
        }

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

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

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #f1f5f9;
        }

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

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

        .case-body {
            padding: 24px;
        }

        .case-tag {
            display: inline-block;
            font-size: 11px;
            padding: 2px 8px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            border-radius: 4px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .case-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .case-desc {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 对比评测 - 专业评测卡片设计 */
        .review-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 15px 30px rgba(0,0,0,0.03);
        }

        .review-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .score-box {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .score-num {
            font-size: 48px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }

        .score-stars {
            color: #f59e0b;
            font-size: 24px;
        }

        .score-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        .comparison-table-wrapper {
            overflow-x: auto;
        }

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

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

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

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

        /* 智能需求匹配与表单 */
        .match-section {
            background: linear-gradient(135deg, rgba(37,99,235,0.02) 0%, rgba(124,58,237,0.02) 100%);
        }

        .match-row {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 36px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

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

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 14px;
            transition: var(--transition);
            background-color: var(--bg-light);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
        }

        .btn-submit {
            width: 100%;
            background: var(--primary-gradient);
            color: var(--text-light);
            padding: 14px;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-submit:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

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

        .pricing-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .pricing-card.premium {
            border: 2px solid var(--primary);
            box-shadow: 0 10px 25px rgba(37,99,235,0.08);
        }

        .pricing-badge {
            position: absolute;
            top: 15px;
            right: -30px;
            background: var(--primary-gradient);
            color: var(--text-light);
            font-size: 11px;
            padding: 4px 30px;
            transform: rotate(45deg);
            font-weight: 700;
        }

        .pricing-header h4 {
            font-size: 20px;
            margin-bottom: 10px;
        }

        .price-box {
            margin: 20px 0;
        }

        .price-val {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
        }

        .price-unit {
            font-size: 14px;
            color: var(--text-muted);
        }

        .pricing-features {
            list-style: none;
            margin: 20px 0;
            padding: 0;
            text-align: left;
        }

        .pricing-features li {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        /* 培训中心 - 职业与人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .training-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: var(--transition);
        }

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

        .training-icon {
            font-size: 28px;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .training-title {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .training-desc {
            font-size: 12px;
            color: var(--text-muted);
        }

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 16px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: var(--transition);
        }

        .faq-question:hover {
            background-color: var(--bg-light);
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--text-muted);
            font-size: 14px;
            border-top: 0 solid var(--border-color);
        }

        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 200px;
            border-top: 1px solid var(--border-color);
        }

        .faq-toggle {
            transition: transform 0.3s;
        }

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

        /* 帮助中心自主排查 & 术语百科 */
        .help-section-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 40px;
        }

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

        .help-subcard h3 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .help-list-items {
            list-style: none;
            padding: 0;
        }

        .help-list-items li {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 8px;
        }

        .help-list-items li a {
            color: var(--primary);
            text-decoration: none;
        }

        /* 客户评论卡片 (6条) */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .comment-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .user-avatar-placeholder {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: var(--text-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .user-meta h4 {
            font-size: 15px;
            margin: 0;
        }

        .user-meta p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 0;
        }

        .comment-text {
            font-size: 14px;
            color: var(--text-muted);
            font-style: italic;
        }

        /* 资讯列表 */
        .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;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .article-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
            text-decoration: none;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-title:hover {
            color: var(--primary);
        }

        .article-meta {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* 底部及友情链接 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 14px;
            border-top: 1px solid #1e293b;
        }

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

        .footer-brand h4 {
            color: var(--text-light);
            font-size: 18px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .footer-links h4 {
            color: var(--text-light);
            font-size: 16px;
            margin-bottom: 16px;
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
        }

        .footer-links ul li {
            margin-bottom: 10px;
        }

        .footer-links ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links ul li a:hover {
            color: var(--text-light);
        }

        .footer-contact h4 {
            color: var(--text-light);
            font-size: 16px;
            margin-bottom: 16px;
        }

        .footer-contact-info p {
            margin-bottom: 8px;
        }

        .friend-links-box {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            margin-top: 20px;
        }

        .friend-links-title {
            font-size: 12px;
            color: #64748b;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            font-size: 12px;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: var(--text-light);
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: #64748b;
        }

        /* 客服浮动与二维码组件 */
        .float-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            cursor: pointer;
            transition: var(--transition);
        }

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

        .float-contact svg {
            width: 28px;
            height: 28px;
            fill: var(--primary);
        }

        .float-qr-box {
            position: absolute;
            bottom: 75px;
            right: 0;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 220px;
            text-align: center;
        }

        .float-qr-box img {
            width: 100%;
            height: auto;
            margin-bottom: 8px;
        }

        .float-qr-box p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 0;
        }

        .float-contact:hover .float-qr-box {
            display: block;
        }

        /* 移动端适配 */
        @media (max-width: 1024px) {
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--bg-card);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
            }

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

            .menu-toggle {
                display: block;
            }

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

            .about-row, .solution-row, .match-row, .help-section-box {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .service-grid, .case-grid, .pricing-grid, .comments-grid {
                grid-template-columns: 1fr;
            }

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

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

            .timeline::after {
                left: 31px;
            }

            .timeline-container {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }

            .timeline-container::after {
                left: 23px;
            }

            .right-timeline {
                left: 0%;
            }

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

            .hero h1 {
                font-size: 32px;
            }
            
            .standard-grid {
                grid-template-columns: 1fr;
            }
        }