:root {
            --primary: #FF6A00;
            --primary-hover: #FF3B00;
            --primary-light: #FFF0E6;
            --text-dark: #1A1A1A;
            --text-muted: #666666;
            --bg-light: #FAFAFA;
            --bg-white: #FFFFFF;
            --border-color: #EAEAEA;
            --card-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        * {
            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-dark);
            background-color: var(--bg-light);
        }

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

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

        ul {
            list-style: none;
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-padding {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title h2 {
            font-size: 2.2rem;
            color: var(--text-dark);
            margin-bottom: 15px;
            font-weight: 700;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-hover));
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .section-title p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            color: var(--bg-white);
            box-shadow: 0 4px 15px rgba(255, 106, 0, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 106, 0, 0.4);
            color: var(--bg-white);
        }

        .btn-secondary {
            background: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(255, 106, 0, 0.2);
        }

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

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            z-index: 1000;
            transition: var(--transition);
        }

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

        .logo-box {
            display: flex;
            align-items: center;
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
            padding: 8px 12px;
            border-radius: 4px;
        }

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

        .nav-btn {
            padding: 8px 20px;
            font-size: 0.9rem;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: none;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-dark);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* 首屏 Hero - 无图片设计 */
        .hero-section {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 106, 0, 0.08) 0%, transparent 50%), 
                        radial-gradient(circle at 20% 80%, rgba(255, 59, 0, 0.05) 0%, transparent 50%),
                        var(--bg-white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

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

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(255, 106, 0, 0.2);
            animation: pulse 2s infinite;
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.25;
            margin-bottom: 25px;
            font-weight: 800;
            color: var(--text-dark);
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--primary), var(--primary-hover));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .hero-btn-group {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
        }

        .hero-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .hero-feature-card {
            background: rgba(255,255,255,0.8);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            backdrop-filter: blur(5px);
            transition: var(--transition);
        }

        .hero-feature-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .hero-feature-card h4 {
            font-size: 1.1rem;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .hero-feature-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 数据指标 */
        .stats-section {
            background-color: var(--bg-light);
            padding: 60px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-item h3 {
            font-size: 2.5rem;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 5px;
        }

        .stat-item p {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 关于我们 */
        .about-section {
            background-color: var(--bg-white);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .about-features {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .about-feature-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .about-feature-item svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
            flex-shrink: 0;
            margin-top: 3px;
        }

        .about-feature-item div h5 {
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .about-feature-item div p {
            font-size: 0.85rem;
            margin: 0;
        }

        .about-visual {
            background: linear-gradient(135deg, var(--primary-light) 0%, rgba(255,106,0,0.05) 100%);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid rgba(255,106,0,0.15);
            text-align: center;
        }

        .about-visual-badge {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 15px;
        }

        /* 全平台AIGC服务 */
        .services-section {
            background-color: var(--bg-light);
        }

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

        .service-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 35px 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: 0 15px 40px rgba(255, 106, 0, 0.08);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
        }

        .service-icon svg {
            width: 26px;
            height: 26px;
            fill: var(--primary);
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }

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

        .service-model-tag {
            font-size: 0.75rem;
            background-color: var(--bg-light);
            color: var(--text-muted);
            padding: 3px 8px;
            border-radius: 4px;
            border: 1px solid var(--border-color);
        }

        /* 一站式AIGC制作 - 包含图片 */
        .production-section {
            background-color: var(--bg-white);
        }

        .production-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            align-items: center;
            margin-bottom: 60px;
        }

        .production-media-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .production-media-grid img {
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-color);
        }

        .production-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .production-text ul {
            margin-bottom: 30px;
        }

        .production-text li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 12px;
            color: var(--text-muted);
        }

        .production-text li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        /* 全行业解决方案 */
        .solutions-section {
            background-color: var(--bg-light);
        }

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

        .solution-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .solution-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .solution-card-body {
            padding: 30px;
        }

        .solution-card h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
        }

        .solution-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .solution-features {
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
            margin-top: auto;
        }

        .solution-feature-tag {
            display: inline-block;
            font-size: 0.75rem;
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 20px;
            margin-right: 6px;
            margin-bottom: 6px;
        }

        /* 全国服务网络与加盟代理 */
        .network-section {
            background-color: var(--bg-white);
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
        }

        .network-info h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .network-info p {
            color: var(--text-muted);
            margin-bottom: 30px;
        }

        .network-branches {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

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

        .branch-card h4 {
            color: var(--primary);
            margin-bottom: 8px;
        }

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

        .agent-card {
            background: linear-gradient(135deg, var(--text-dark) 0%, #333 100%);
            color: var(--bg-white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
        }

        .agent-card h3 {
            font-size: 1.6rem;
            margin-bottom: 15px;
            color: var(--primary);
        }

        .agent-card p {
            color: #ccc;
            margin-bottom: 25px;
            font-size: 0.95rem;
        }

        .agent-list {
            margin-bottom: 30px;
        }

        .agent-list li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
        }

        .agent-list li::before {
            content: '●';
            color: var(--primary);
        }

        /* 标准化AIGC流程 */
        .process-section {
            background-color: var(--bg-light);
        }

        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .process-step {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            position: relative;
            box-shadow: var(--card-shadow);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: var(--bg-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-weight: 700;
        }

        .process-step h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 技术标准 */
        .standards-section {
            background-color: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }

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

        .standard-card {
            border-top: 4px solid var(--primary);
            background-color: var(--bg-light);
            padding: 30px;
            border-radius: 0 0 8px 8px;
            box-shadow: var(--card-shadow);
        }

        .standard-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

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

        /* 客户案例中心 */
        .cases-section {
            background-color: var(--bg-light);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 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-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .case-info {
            padding: 25px;
        }

        .case-info h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .case-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* 对比评测 - 突出 9.9 分，五星推荐 */
        .comparison-section {
            background-color: var(--bg-white);
        }

        .comparison-overview {
            background-color: var(--primary-light);
            border: 1px solid rgba(255, 106, 0, 0.2);
            border-radius: 16px;
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 50px;
        }

        .comparison-score-box {
            text-align: center;
        }

        .comparison-stars {
            color: #FFB800;
            font-size: 1.8rem;
            margin-bottom: 10px;
        }

        .comparison-score {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }

        .comparison-score span {
            font-size: 1.5rem;
            color: var(--text-muted);
        }

        .comparison-badge-text {
            font-size: 1.1rem;
            font-weight: 700;
            margin-top: 5px;
        }

        .comparison-intro {
            max-width: 600px;
        }

        .comparison-intro h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

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

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 8px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background-color: var(--bg-white);
            min-width: 800px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }

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

        .comparison-table tr:hover {
            background-color: rgba(255,106,0,0.02);
        }

        .comp-highlight {
            color: var(--primary);
            font-weight: 700;
            background-color: rgba(255, 106, 0, 0.03);
        }

        /* Token 比价参考 */
        .pricing-section {
            background-color: var(--bg-light);
        }

        /* 职业/人工智能培训 */
        .training-section {
            background-color: var(--bg-white);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .training-card {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px 20px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            background-color: var(--bg-white);
            box-shadow: var(--card-shadow);
        }

        .training-card h3 {
            font-size: 1.05rem;
            margin-bottom: 12px;
            color: var(--text-dark);
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .training-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .training-tag {
            display: inline-block;
            font-size: 0.75rem;
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 4px;
            font-weight: 600;
        }

        /* 用户评论 */
        .reviews-section {
            background-color: var(--bg-light);
        }

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

        .review-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--card-shadow);
        }

        .review-stars {
            color: #FFB800;
            font-size: 1rem;
            margin-bottom: 15px;
        }

        .review-content {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            height: 72px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .user-meta h4 {
            font-size: 0.9rem;
            margin-bottom: 2px;
        }

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

        /* 需求匹配与联系我们 */
        .contact-section {
            background-color: var(--bg-white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

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

        .form-card h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-white);
            border-radius: 6px;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.15);
        }

        .contact-info-card {
            background: linear-gradient(135deg, var(--primary-light) 0%, rgba(255,106,0,0.02) 100%);
            border: 1px solid rgba(255,106,0,0.15);
            border-radius: 16px;
            padding: 40px;
        }

        .contact-info-card h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
        }

        .contact-details {
            margin-bottom: 30px;
        }

        .contact-detail-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 20px;
        }

        .contact-detail-item svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
            margin-top: 3px;
        }

        .contact-detail-item h4 {
            font-size: 0.95rem;
            margin-bottom: 4px;
        }

        .contact-detail-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            border-top: 1px solid var(--border-color);
            padding-top: 30px;
        }

        .qr-item {
            text-align: center;
            flex: 1;
        }

        .qr-item img {
            width: 100px;
            height: 100px;
            margin: 0 auto 10px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 5px;
            background-color: var(--bg-white);
        }

        .qr-item p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 帮助中心 & 百科 & 自助排查 */
        .help-section {
            background-color: var(--bg-light);
        }

        .help-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-bottom: 60px;
        }

        .trouble-card, .glossary-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 35px;
            box-shadow: var(--card-shadow);
        }

        .trouble-card h3, .glossary-card h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 10px;
        }

        .trouble-list li, .glossary-list li {
            margin-bottom: 15px;
        }

        .trouble-list h4 {
            font-size: 0.95rem;
            margin-bottom: 5px;
            color: var(--primary-hover);
        }

        .trouble-list p, .glossary-list p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .glossary-list h4 {
            font-size: 0.95rem;
            margin-bottom: 5px;
        }

        /* FAQ折叠面板 */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .faq-header {
            padding: 20px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .faq-header:hover {
            color: var(--primary);
            background-color: var(--primary-light);
        }

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

        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.9rem;
            border-top: 0 solid var(--border-color);
        }

        .faq-item.active .faq-content {
            padding: 20px 24px;
            max-height: 300px;
            border-top: 1px solid var(--border-color);
        }

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

        /* 知识库/行业资讯 */
        .blog-section {
            background-color: var(--bg-white);
        }

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

        .blog-card {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .blog-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            background-color: var(--bg-white);
            box-shadow: var(--card-shadow);
        }

        .blog-card h3 {
            font-size: 1.15rem;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .blog-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .blog-footer {
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
        }

        .blog-link {
            color: var(--primary);
            font-weight: 600;
        }

        /* 页脚 */
        footer {
            background-color: var(--text-dark);
            color: #CCCCCC;
            padding: 60px 0 30px;
            font-size: 0.85rem;
        }

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

        .footer-col h4 {
            color: var(--bg-white);
            font-size: 1rem;
            margin-bottom: 20px;
            font-weight: 600;
        }

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

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

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

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 10px;
        }

        .friend-links a {
            background-color: #333333;
            color: #CCCCCC;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.75rem;
        }

        .friend-links a:hover {
            background-color: var(--primary);
            color: var(--bg-white);
        }

        .footer-bottom {
            border-top: 1px solid #333333;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 悬浮侧栏 */
        .sticky-toolbar {
            position: fixed;
            right: 20px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .toolbar-btn {
            width: 50px;
            height: 50px;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .toolbar-btn:hover {
            background-color: var(--primary);
            color: var(--bg-white);
        }

        .toolbar-btn:hover svg {
            fill: var(--bg-white);
        }

        .toolbar-btn svg {
            width: 22px;
            height: 22px;
            fill: var(--text-dark);
        }

        .toolbar-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            box-shadow: var(--card-shadow);
            display: none;
            text-align: center;
            width: 140px;
        }

        .toolbar-btn:hover .toolbar-popover {
            display: block;
        }

        .toolbar-popover img {
            width: 110px;
            height: 110px;
            margin-bottom: 8px;
        }

        .toolbar-popover p {
            font-size: 0.75rem;
            color: var(--text-dark);
            margin: 0;
        }

        /* 动画效果 */
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.03); }
            100% { transform: scale(1); }
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.5rem; }
            .hero-features, .services-grid, .solutions-grid, .cases-grid, .reviews-grid, .blog-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: flex; }
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 40px 20px;
                gap: 20px;
                transition: var(--transition);
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            }
            .nav-menu.active { left: 0; }
            .hero-title { font-size: 2rem; }
            .hero-btn-group { flex-direction: column; gap: 12px; }
            .hero-features, .stats-grid, .about-grid, .services-grid, .production-content, 
            .solutions-grid, .network-grid, .process-flow, .standards-grid, .cases-grid, 
            .reviews-grid, .contact-grid, .help-grid, .blog-grid, .training-grid {
                grid-template-columns: 1fr;
            }
            .production-media-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .comparison-overview { flex-direction: column; gap: 20px; text-align: center; }
            .form-grid { grid-template-columns: 1fr; }
            .form-group-full { grid-column: span 1; }
        }