/* 变量及基础重置 */
        :root {
            --primary: #10b981; /* 薄荷绿 */
            --primary-hover: #059669;
            --primary-light: #ecfdf5;
            --dark-green: #064e3b;
            --text-main: #1f2937;
            --text-muted: #4b5563;
            --bg-light: #f9fafb;
            --bg-card: #ffffff;
            --border-color: #e5e7eb;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-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, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

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

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

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.5rem;
            font-weight: 600;
            border-radius: 0.5rem;
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn-primary {
            background-color: var(--primary);
            color: white !important;
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
        }

        .btn-outline {
            border-color: var(--primary);
            color: var(--primary) !important;
            background-color: transparent;
        }

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

        /* 导航栏 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 4.5rem;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .ai-page-logo {
            height: 2.2rem;
            width: auto;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--dark-green);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        .nav-links a {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-muted);
        }

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

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-main);
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 全局Section通用标题 */
        section {
            padding: 5rem 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 3.5rem auto;
        }

        .section-tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background-color: var(--primary-light);
            color: var(--primary-hover);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 9999px;
            margin-bottom: 1rem;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark-green);
            margin-bottom: 1rem;
            line-height: 1.3;
        }

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

        /* 1. Hero 首屏 - 纯文字/无图片设计 */
        .hero-section {
            background: linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
            padding: 7rem 0 6rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(52, 211, 153, 0.15) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-title-h1 {
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--dark-green);
            line-height: 1.25;
            margin-bottom: 1.5rem;
            letter-spacing: -0.02em;
        }

        .hero-lead {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            max-width: 750px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 3.5rem;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            background: white;
            padding: 1.75rem;
            border-radius: 1rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
        }

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

        .stat-val {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.25rem;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 2. 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.5rem;
            color: var(--dark-green);
            margin-bottom: 1rem;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .about-features {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .about-feat-card {
            background: white;
            padding: 1.25rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .about-feat-card:hover {
            border-color: var(--primary);
            box-shadow: 0 5px 15px rgba(16, 185, 129, 0.05);
        }

        .about-feat-card h4 {
            color: var(--dark-green);
            margin-bottom: 0.5rem;
            font-size: 1rem;
        }

        .about-feat-card p {
            font-size: 0.85rem;
            margin: 0;
        }

        /* 3. 全平台AIGC服务体系 */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
            margin-bottom: 3rem;
        }

        .platform-card {
            background: white;
            padding: 1.5rem;
            border-radius: 0.75rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .platform-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: 0 10px 20px rgba(0,0,0,0.04);
        }

        .platform-card h3 {
            font-size: 1.15rem;
            color: var(--dark-green);
            margin-bottom: 0.75rem;
        }

        .platform-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

        .platform-tag-container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
        }

        .platform-mini-tag {
            font-size: 0.75rem;
            padding: 0.15rem 0.4rem;
            background: var(--bg-light);
            border-radius: 0.25rem;
            color: var(--text-muted);
        }

        /* 支持的AI平台标签云 */
        .cloud-container {
            background: var(--primary-light);
            border-radius: 1rem;
            padding: 2rem;
            text-align: center;
        }

        .cloud-title {
            font-weight: 700;
            color: var(--dark-green);
            margin-bottom: 1.25rem;
            font-size: 1.1rem;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.75rem;
        }

        .cloud-tag {
            background: white;
            padding: 0.4rem 0.9rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            color: var(--dark-green);
            font-weight: 500;
            box-shadow: 0 2px 5px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

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

        /* 4. 全自动AIGC制作流程 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            position: relative;
        }

        .process-step-card {
            background: white;
            padding: 2rem 1.5rem;
            border-radius: 0.75rem;
            border: 1px solid var(--border-color);
            position: relative;
            transition: var(--transition);
        }

        .process-step-card:hover {
            box-shadow: 0 10px 25px rgba(16, 185, 129, 0.08);
            border-color: var(--primary);
        }

        .step-num {
            position: absolute;
            top: -1.5rem;
            left: 1.5rem;
            width: 3rem;
            height: 3rem;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.25rem;
            border: 4px solid var(--bg-light);
        }

        .process-step-card h3 {
            margin-top: 0.5rem;
            font-size: 1.2rem;
            color: var(--dark-green);
            margin-bottom: 0.75rem;
        }

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

        /* 5. 全行业解决方案 */
        .solution-tabs-nav {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 2.5rem;
            flex-wrap: wrap;
        }

        .tab-btn {
            background: white;
            border: 1px solid var(--border-color);
            padding: 0.6rem 1.25rem;
            border-radius: 0.5rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text-muted);
        }

        .tab-btn.active, .tab-btn:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .solution-content-wrapper {
            background: white;
            padding: 2.5rem;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
        }

        .solution-pane {
            display: none;
            grid-template-columns: 1.2fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        .solution-pane.active {
            display: grid;
        }

        .sol-text h3 {
            font-size: 1.4rem;
            color: var(--dark-green);
            margin-bottom: 1rem;
        }

        .sol-text p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .sol-features {
            list-style: none;
        }

        .sol-features li {
            position: relative;
            padding-left: 1.5rem;
            margin-bottom: 0.75rem;
            font-size: 0.9rem;
            color: var(--text-main);
        }

        .sol-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }

        .sol-visual {
            background: var(--primary-light);
            border-radius: 0.75rem;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .sol-stat-box {
            background: white;
            padding: 1rem;
            border-radius: 0.5rem;
            border-left: 4px solid var(--primary);
        }

        .sol-stat-num {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--dark-green);
        }

        .sol-stat-lbl {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 6. 全国服务网络 */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .network-map-visual {
            background: linear-gradient(135deg, var(--primary-light) 0%, #d1fae5 100%);
            border-radius: 1rem;
            height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            border: 1px solid var(--border-color);
        }

        .map-marker {
            position: absolute;
            background: var(--primary);
            color: white;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 0.25rem 0.5rem;
            border-radius: 0.25rem;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .marker-1 { top: 20%; left: 45%; }
        .marker-2 { top: 45%; left: 50%; }
        .marker-3 { top: 60%; left: 70%; }
        .marker-4 { top: 75%; left: 55%; }

        .network-text h3 {
            font-size: 1.5rem;
            color: var(--dark-green);
            margin-bottom: 1rem;
        }

        .network-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .network-item {
            background: white;
            padding: 0.75rem;
            border-radius: 0.35rem;
            border: 1px solid var(--border-color);
            font-size: 0.875rem;
        }

        /* 7. 标准化服务全流程 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

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

        .timeline-node {
            display: flex;
            justify-content: flex-end;
            padding-right: 50%;
            position: relative;
            margin-bottom: 2.5rem;
        }

        .timeline-node:nth-child(even) {
            justify-content: flex-start;
            padding-right: 0;
            padding-left: 50%;
        }

        .timeline-dot {
            width: 1rem;
            height: 1rem;
            background: var(--primary);
            border: 3px solid white;
            border-radius: 50%;
            position: absolute;
            left: 50%;
            top: 0.5rem;
            transform: translateX(-50%);
            z-index: 2;
        }

        .timeline-content {
            background: white;
            padding: 1.5rem;
            border-radius: 0.5rem;
            border: 1px solid var(--border-color);
            width: 90%;
            box-shadow: 0 4px 10px rgba(0,0,0,0.01);
        }

        .timeline-node:nth-child(even) .timeline-content {
            margin-left: auto;
        }

        .timeline-content h4 {
            color: var(--dark-green);
            margin-bottom: 0.5rem;
            font-size: 1.05rem;
        }

        .timeline-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* 8. 技术标准 */
        .tech-standards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .standard-card {
            background: white;
            padding: 2rem;
            border-radius: 0.75rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .standard-card h3 {
            color: var(--dark-green);
            margin-bottom: 0.75rem;
            font-size: 1.2rem;
        }

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

        /* 9. 客户案例中心 & 用户评论 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin-bottom: 4rem;
        }

        .case-card {
            background: white;
            border-radius: 0.75rem;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
        }

        .case-img-holder {
            height: 200px;
            overflow: hidden;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .case-info {
            padding: 1.5rem;
        }

        .case-info h4 {
            color: var(--dark-green);
            margin-bottom: 0.5rem;
            font-size: 1.1rem;
        }

        .case-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.75rem;
            color: var(--primary-hover);
            font-weight: 600;
        }

        /* 用户评论区 */
        .reviews-title {
            text-align: center;
            color: var(--dark-green);
            margin-bottom: 2rem;
            font-size: 1.5rem;
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .review-card {
            background: white;
            padding: 1.75rem;
            border-radius: 0.75rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 10px rgba(0,0,0,0.01);
            position: relative;
        }

        .review-text {
            font-style: italic;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .user-avatar {
            width: 2.5rem;
            height: 2.5rem;
            background-color: var(--primary-light);
            color: var(--primary-hover);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .user-meta h5 {
            color: var(--dark-green);
            font-size: 0.9rem;
            margin: 0;
        }

        .user-meta span {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 10. 对比评测 */
        .comparison-wrapper {
            background: white;
            padding: 2.5rem;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .score-banner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--primary-light);
            padding: 1.5rem 2rem;
            border-radius: 0.75rem;
            margin-bottom: 2rem;
        }

        .score-info h3 {
            color: var(--dark-green);
            font-size: 1.25rem;
        }

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

        .score-number {
            text-align: right;
        }

        .score-big {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
        }

        .score-stars {
            color: #fbbf24;
            font-size: 1.25rem;
        }

        .compare-table-container {
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .compare-table th, .compare-table td {
            padding: 1rem 1.25rem;
            border-bottom: 1px solid var(--border-color);
        }

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

        .compare-table td.highlight {
            background-color: rgba(16, 185, 129, 0.03);
            font-weight: 600;
            color: var(--primary-hover);
        }

        /* 11. 智能需求匹配 & 20. 联系我们 (表单合并布局) */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 3rem;
        }

        .form-card {
            background: white;
            padding: 2.5rem;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .form-card h3 {
            color: var(--dark-green);
            margin-bottom: 1.5rem;
            font-size: 1.4rem;
        }

        .form-group {
            margin-bottom: 1.25rem;
        }

        .form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }

        .form-control {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            outline: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234b5563' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 1rem center;
            background-size: 1rem;
        }

        .contact-info-panel {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }

        .qr-card {
            background: white;
            padding: 2rem;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .qr-card h4 {
            color: var(--dark-green);
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }

        .qr-img-placeholder {
            width: 150px;
            height: 150px;
            margin: 0 auto 1rem auto;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border-color);
            border-radius: 0.5rem;
            overflow: hidden;
        }

        .contact-details {
            list-style: none;
        }

        .contact-details li {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .contact-details strong {
            color: var(--text-main);
        }

        /* 12. Token比价参考 */
        .token-header-actions {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .token-filter-btns {
            display: flex;
            gap: 0.5rem;
        }

        .filter-chip {
            background: white;
            border: 1px solid var(--border-color);
            padding: 0.35rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-chip.active, .filter-chip:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            border-color: var(--primary);
        }

        /* 13 & 14. 职业技术培训 / 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1.25rem;
        }

        .training-card {
            background: white;
            padding: 1.5rem;
            border-radius: 0.75rem;
            border: 1px solid var(--border-color);
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: 0 10px 20px rgba(0,0,0,0.03);
        }

        .training-badge {
            display: inline-block;
            padding: 0.15rem 0.5rem;
            background: var(--primary-light);
            color: var(--primary-hover);
            font-size: 0.7rem;
            font-weight: 700;
            border-radius: 0.25rem;
            margin-bottom: 0.75rem;
        }

        .training-card h4 {
            color: var(--dark-green);
            font-size: 0.95rem;
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .training-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 15 & 16 & 17. 常见问题 FAQ / 排查 / 帮助中心 */
        .faq-layout {
            display: grid;
            grid-template-columns: 1.8fr 1.2fr;
            gap: 3rem;
        }

        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: white;
            border-radius: 0.5rem;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-trigger {
            width: 100%;
            padding: 1.25rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            text-align: left;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--dark-green);
            cursor: pointer;
        }

        .faq-trigger::after {
            content: "+";
            font-size: 1.25rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-trigger::after {
            content: "−";
        }

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

        .faq-panel-content {
            padding: 1.25rem 1.5rem;
            font-size: 0.875rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            line-height: 1.6;
        }

        .faq-item.active .faq-panel {
            max-height: 500px;
        }

        /* 自助排查与术语百科 */
        .troubleshooting-panel {
            background: white;
            padding: 2rem;
            border-radius: 1rem;
            border: 1px solid var(--border-color);
            height: fit-content;
        }

        .troubleshooting-panel h3 {
            color: var(--dark-green);
            margin-bottom: 1.25rem;
            font-size: 1.2rem;
        }

        .step-diagnose {
            margin-bottom: 1.5rem;
        }

        .diagnose-title {
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
            color: var(--text-main);
        }

        .diagnose-select {
            width: 100%;
            padding: 0.6rem;
            border-radius: 0.35rem;
            border: 1px solid var(--border-color);
            font-size: 0.85rem;
        }

        .diagnose-result {
            margin-top: 1rem;
            padding: 1rem;
            background: var(--primary-light);
            border-radius: 0.5rem;
            font-size: 0.85rem;
            color: var(--dark-green);
            display: none;
        }

        /* 18. 术语百科 */
        .wiki-block {
            margin-top: 2rem;
        }

        .wiki-block h4 {
            color: var(--dark-green);
            margin-bottom: 0.75rem;
            font-size: 1rem;
        }

        .wiki-list {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .wiki-item {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .wiki-item strong {
            color: var(--text-main);
        }

        /* 19. 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .news-card {
            background: white;
            padding: 1.75rem;
            border-radius: 0.75rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .news-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
        }

        .news-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }

        .news-card h4 {
            color: var(--dark-green);
            font-size: 1.05rem;
            margin-bottom: 0.75rem;
            line-height: 1.4;
        }

        .news-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

        .news-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

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

        /* 页脚 */
        footer {
            background-color: var(--dark-green);
            color: #d1fae5;
            padding: 4rem 0 2rem 0;
            font-size: 0.85rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-brand p {
            margin: 1rem 0;
            color: #a7f3d0;
            line-height: 1.6;
        }

        .footer-col h4 {
            color: white;
            font-size: 1rem;
            margin-bottom: 1.25rem;
            position: relative;
            padding-bottom: 0.5rem;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 1.5rem;
            height: 2px;
            background: var(--primary);
        }

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

        .footer-links li {
            margin-bottom: 0.75rem;
        }

        .footer-links a {
            color: #a7f3d0;
        }

        .footer-links a:hover {
            color: white;
            padding-left: 0.25rem;
        }

        .friend-links {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 2rem;
            margin-top: 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }

        .friend-links span {
            color: white;
            font-weight: 600;
        }

        .friend-links a {
            color: #a7f3d0;
        }

        .friend-links a:hover {
            color: white;
        }

        .copyright-bar {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            text-align: center;
            color: #a7f3d0;
            font-size: 0.75rem;
        }

        /* 浮动客服及返回顶部 */
        .floating-widget {
            position: fixed;
            right: 1.5rem;
            bottom: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            z-index: 99;
        }

        .widget-btn {
            width: 3rem;
            height: 3rem;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
            transition: var(--transition);
            position: relative;
        }

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

        .widget-btn svg {
            width: 1.5rem;
            height: 1.5rem;
            fill: var(--primary-hover);
        }

        .qr-popover {
            position: absolute;
            right: 3.5rem;
            bottom: 0;
            background: white;
            border: 1px solid var(--border-color);
            padding: 1rem;
            border-radius: 0.5rem;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            display: none;
            text-align: center;
            width: 160px;
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 0.5rem;
        }

        .qr-popover span {
            font-size: 0.75rem;
            color: var(--text-main);
            font-weight: 600;
        }

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

        #back-to-top {
            opacity: 0;
            visibility: hidden;
        }

        #back-to-top.show {
            opacity: 1;
            visibility: visible;
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .platform-grid, .cases-grid, .reviews-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .about-grid, .network-grid, .contact-grid, .faq-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 4.5rem;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 1.5rem;
                border-bottom: 1px solid var(--border-color);
                gap: 1rem;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }
            
            .nav-links.active {
                display: flex;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero-title-h1 {
                font-size: 2rem;
            }

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

            .process-steps, .tech-standards, .platform-grid, .cases-grid, .reviews-grid, .news-grid {
                grid-template-columns: 1fr;
            }

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

            .timeline::before {
                left: 1.5rem;
            }

            .timeline-node {
                padding-right: 0;
                padding-left: 3rem;
                justify-content: flex-start;
            }

            .timeline-node:nth-child(even) {
                padding-left: 3rem;
            }

            .timeline-dot {
                left: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
        }