/* 样式基础重置与高亮度鲜活风配色系统 */
        :root {
            --primary-color: #1e6fff; /* 科技深蓝 */
            --secondary-color: #00c2ff; /* 鲜活青 */
            --accent-color: #825eff; /* 活力紫 */
            --warning-color: #ff9d00; /* 亮橙 */
            --bg-light: #f5f8ff; /* 亮面背景 */
            --bg-white: #ffffff;
            --text-dark: #111b2b; /* 深度正文 */
            --text-muted: #4e5d78; /* 辅助文字 */
            --border-color: #e2eaf8;
            --card-shadow: 0 10px 30px rgba(30, 111, 255, 0.05);
            --card-shadow-hover: 0 15px 40px rgba(30, 111, 255, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

        * {
            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 CJK SC", sans-serif;
            color: var(--text-dark);
            background-color: var(--bg-light);
        }

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

        /* 统一容器类 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 统一标题规范 */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            color: var(--text-dark);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            margin: 8px auto 0;
            border-radius: 2px;
        }
        .section-header p {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 常用按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: var(--bg-white);
            box-shadow: 0 4px 15px rgba(30, 111, 255, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(30, 111, 255, 0.35);
        }
        .btn-secondary {
            background-color: var(--bg-white);
            color: var(--primary-color);
            border: 1px solid var(--border-color);
        }
        .btn-secondary:hover {
            background-color: var(--bg-light);
            border-color: var(--primary-color);
        }

        /* 顶部导航 */
        header.nav-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            height: 70px;
            display: flex;
            align-items: center;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
            object-fit: contain;
        }
        .brand-name {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: 0.5px;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 20px;
            align-items: center;
        }
        .nav-menu a {
            color: var(--text-dark);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: var(--primary-color);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-dark);
        }

        /* Hero首屏 - 严禁出现任何图片 */
        .hero-section {
            padding: 100px 0 80px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 194, 255, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(130, 94, 255, 0.08) 0%, transparent 50%),
                        var(--bg-white);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background-color: rgba(30, 111, 255, 0.08);
            color: var(--primary-color);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 50px;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }
        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            color: var(--text-dark);
            font-weight: 800;
            max-width: 900px;
            margin: 0 auto 24px;
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-description {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 750px;
            margin: 0 auto 36px;
        }
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 48px;
        }
        .hero-feature-tags {
            display: flex;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .tag-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-dark);
            background: var(--bg-light);
            padding: 8px 16px;
            border-radius: 6px;
            border: 1px solid var(--border-color);
        }
        .tag-icon {
            color: var(--secondary-color);
            font-weight: bold;
        }

        /* 基础间距 */
        section {
            padding: 80px 0;
        }
        .white-bg {
            background-color: var(--bg-white);
        }
        .light-bg {
            background-color: var(--bg-light);
        }

        /* 数据指标卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }
        .metric-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px 24px;
            text-align: center;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .metric-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow-hover);
        }
        .metric-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 8px;
        }
        .metric-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 关于我们 */
        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.75rem;
            color: var(--text-dark);
            margin-bottom: 16px;
        }
        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1rem;
        }
        .about-keypoints {
            list-style: none;
        }
        .about-keypoints li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 500;
        }
        .about-keypoints li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--accent-color);
            font-weight: 900;
        }
        .about-highlight-box {
            background: linear-gradient(135deg, rgba(30, 111, 255, 0.05), rgba(0, 194, 255, 0.05));
            border-left: 4px solid var(--primary-color);
            padding: 30px;
            border-radius: 0 12px 12px 0;
        }
        .about-highlight-box h4 {
            color: var(--primary-color);
            margin-bottom: 12px;
            font-size: 1.2rem;
        }

        /* 服务体系 (支持30+大模型) */
        .service-tabs-container {
            margin-top: 30px;
        }
        .platforms-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .platform-badge {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            color: var(--text-dark);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .platform-badge:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            box-shadow: 0 4px 10px rgba(30, 111, 255, 0.08);
            transform: scale(1.05);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .service-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 32px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow-hover);
        }
        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background-color: rgba(30, 111, 255, 0.1);
            color: var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }
        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--text-dark);
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 制作流程 & 服务全流程 (双时间线) */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            position: relative;
        }
        .process-step {
            background-color: var(--bg-white);
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            text-align: center;
            position: relative;
            box-shadow: var(--card-shadow);
        }
        .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 16px;
        }
        .process-step h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 行业解决方案 */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }
        .solution-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow-hover);
        }
        .solution-content {
            padding: 30px;
        }
        .solution-tag {
            display: inline-block;
            padding: 4px 10px;
            background-color: rgba(0, 194, 255, 0.1);
            color: var(--secondary-color);
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .solution-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .solution-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .solution-footer {
            margin-top: auto;
            border-top: 1px solid var(--border-color);
            padding: 16px 30px;
            background-color: var(--bg-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .solution-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary-color);
            text-decoration: none;
        }

        /* 全国服务网络 */
        .network-section {
            background: linear-gradient(135deg, #111b2b 0%, #1e6fff 100%);
            color: var(--bg-white);
        }
        .network-section h2, .network-section p {
            color: var(--bg-white);
        }
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            gap: 48px;
            align-items: center;
        }
        .network-map-placeholder {
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 12px;
            padding: 40px;
            background: rgba(255, 255, 255, 0.05);
            text-align: center;
        }
        .network-map-placeholder h4 {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: var(--secondary-color);
        }
        .network-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .network-item {
            background-color: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            padding: 20px;
            border-left: 3px solid var(--secondary-color);
        }
        .network-item h4 {
            margin-bottom: 6px;
            font-size: 1.1rem;
        }
        .network-item p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* 技术标准模块 */
        .tech-standard-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: start;
        }
        .tech-detail-card {
            background-color: var(--bg-white);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }
        .tech-detail-card h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            color: var(--primary-color);
        }
        .tech-specs {
            margin-top: 24px;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .spec-box {
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 8px;
            background-color: var(--bg-light);
        }
        .spec-box strong {
            display: block;
            font-size: 1.1rem;
            color: var(--accent-color);
        }
        .spec-box span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 客户案例中心 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            margin-top: 30px;
        }
        .case-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }
        .case-img-wrap {
            width: 100%;
            background-color: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .case-img-wrap img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.05);
        }
        .case-info {
            padding: 24px;
        }
        .case-info h4 {
            font-size: 1.25rem;
            margin-bottom: 8px;
        }
        .case-info p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 12px;
        }

        /* 对比评测模块 */
        .rating-hero {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .rating-box {
            background-color: var(--bg-white);
            border: 2px solid var(--primary-color);
            padding: 20px 40px;
            border-radius: 16px;
            text-align: center;
            box-shadow: var(--card-shadow);
        }
        .rating-score {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--primary-color);
            line-height: 1;
        }
        .rating-max {
            font-size: 1.2rem;
            color: var(--text-muted);
        }
        .rating-stars {
            color: var(--warning-color);
            font-size: 1.8rem;
            margin-top: 6px;
        }
        .compare-table-wrapper {
            width: 100%;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-white);
            box-shadow: var(--card-shadow);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }
        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
        }
        .compare-table th {
            background-color: var(--bg-light);
            font-weight: 700;
            color: var(--text-dark);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table td.highlight {
            background-color: rgba(30, 111, 255, 0.02);
            font-weight: 600;
            color: var(--primary-color);
        }
        .compare-status-yes {
            color: #10b981;
            font-weight: bold;
        }
        .compare-status-no {
            color: #ef4444;
        }

        /* 需求表单与匹配 */
        .demand-section {
            background: linear-gradient(135deg, rgba(130, 94, 255, 0.02) 0%, rgba(30, 111, 255, 0.05) 100%);
        }
        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .form-card {
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow-hover);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group.full-width {
            grid-column: span 2;
        }
        .form-group label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-dark);
        }
        .form-group input, .form-group select, .form-group textarea {
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }
        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(30, 111, 255, 0.1);
        }
        .form-tip {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 12px;
            text-align: center;
        }

        /* Token 比价 */
        .price-compare-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .price-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            text-align: center;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .price-card.hot::before {
            content: "全网低价";
            position: absolute;
            top: 15px;
            right: -30px;
            background-color: var(--warning-color);
            color: var(--bg-white);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 30px;
            transform: rotate(45deg);
        }
        .price-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow-hover);
        }
        .price-model-name {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .price-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary-color);
            margin: 16px 0;
        }
        .price-num small {
            font-size: 1rem;
            color: var(--text-muted);
            font-weight: normal;
        }
        .price-details {
            list-style: none;
            margin-bottom: 24px;
            text-align: left;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .price-details li {
            margin-bottom: 8px;
            padding-left: 20px;
            position: relative;
        }
        .price-details li::before {
            content: "•";
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: bold;
        }

        /* 职业与人工智能培训 */
        .training-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .training-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .training-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 20px;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }
        .training-card:hover {
            transform: translateX(5px);
            border-color: var(--accent-color);
        }
        .training-icon-badge {
            width: 50px;
            height: 50px;
            background-color: rgba(130, 94, 255, 0.1);
            color: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .training-info h4 {
            font-size: 1.15rem;
            margin-bottom: 4px;
        }
        .training-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 帮助中心、问题排查与术语百科 */
        .help-center-tabs {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .help-tab {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--card-shadow);
        }
        .help-tab h3 {
            font-size: 1.25rem;
            margin-bottom: 16px;
            color: var(--primary-color);
            border-bottom: 2px solid var(--bg-light);
            padding-bottom: 10px;
        }
        .help-list {
            list-style: none;
        }
        .help-list li {
            margin-bottom: 10px;
        }
        .help-list a {
            color: var(--text-dark);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .help-list a:hover {
            color: var(--primary-color);
            padding-left: 4px;
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            outline: none;
        }
        .faq-question::after {
            content: "+";
            font-size: 1.5rem;
            color: var(--primary-color);
            transition: var(--transition);
        }
        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--bg-light);
        }
        .faq-answer-content {
            padding: 20px 24px;
            font-size: 0.95rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
        }

        /* 客户评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .review-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-style: italic;
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 16px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .author-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
        }
        .author-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 行业资讯 / 知识库 */
        .articles-section {
            background-color: var(--bg-white);
        }
        .articles-wrapper {
            margin-bottom: 30px;
        }
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .article-card {
            background-color: var(--bg-light);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary-color);
        }
        .article-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .article-title a {
            color: var(--text-dark);
            text-decoration: none;
            transition: var(--transition);
        }
        .article-title a:hover {
            color: var(--primary-color);
        }
        .article-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(0,0,0,0.05);
            padding-top: 12px;
        }

        /* 联系我们与客服渠道 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: start;
        }
        .contact-channels {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .channel-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            display: flex;
            gap: 20px;
            box-shadow: var(--card-shadow);
        }
        .channel-info h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .channel-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .qr-box {
            width: 110px;
            height: 110px;
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            flex-shrink: 0;
        }
        .qr-box img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        /* 友情链接与页脚 */
        footer.site-footer {
            background-color: #0d1527;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            color: var(--bg-white);
            margin-bottom: 16px;
            font-size: 1.4rem;
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.8;
        }
        .footer-links-group h4 {
            color: var(--bg-white);
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .footer-links-group ul {
            list-style: none;
        }
        .footer-links-group ul li {
            margin-bottom: 10px;
        }
        .footer-links-group ul li a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .footer-links-group ul li a:hover {
            color: var(--secondary-color);
        }
        .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;
            font-size: 0.8rem;
        }
        .footer-bottom-links {
            display: flex;
            gap: 16px;
        }
        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
        }
        .footer-bottom-links a:hover {
            color: var(--secondary-color);
        }

        /* 侧边浮动客服 */
        .floating-service {
            position: fixed;
            right: 24px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(30, 111, 255, 0.3);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }
        .float-btn:hover {
            transform: scale(1.1);
            background-color: var(--accent-color);
        }
        .float-btn-text {
            font-size: 0.75rem;
            font-weight: bold;
            text-align: center;
            line-height: 1.2;
        }
        .qr-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 12px;
            box-shadow: var(--card-shadow-hover);
            display: none;
            width: 140px;
            text-align: center;
        }
        .qr-popover img {
            width: 100%;
            height: auto;
            margin-bottom: 6px;
        }
        .qr-popover p {
            font-size: 0.75rem;
            color: var(--text-dark);
            margin: 0;
        }
        .float-btn:hover .qr-popover {
            display: block;
        }

        /* 移动端菜单展开状态 */
        .nav-menu.open {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 70px;
            left: 0;
            width: 100%;
            background-color: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            padding: 24px;
            gap: 16px;
            box-shadow: var(--card-shadow-hover);
        }

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .about-content, .form-layout, .contact-layout, .tech-standard-grid, .training-container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .network-grid {
                grid-template-columns: 1fr;
            }
            .help-center-tabs {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            .hero-btns .btn {
                width: 100%;
                max-width: 300px;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }