:root {
            --primary: #10B981; /* 鲜绿色 */
            --primary-light: #D1FAE5;
            --primary-dark: #059669;
            --dark: #111827;
            --dark-soft: #1F2937;
            --light: #F9FAFB;
            --gray: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --warning: #F59E0B;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--dark-soft);
            background-color: #FFFFFF;
        }

        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;
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 统一区块标题 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

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

        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            margin: 8px auto 0;
            border-radius: 2px;
        }

        .section-header p {
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
        }

        .btn-dark {
            background-color: var(--dark);
            color: #FFFFFF;
        }

        .btn-dark:hover {
            background-color: #000000;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }

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

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

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

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

        .ai-page-logo {
            max-height: 48px;
            object-fit: contain;
        }

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

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

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

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* Hero 首屏 - 纯色渐变与几何感，完全无图 */
        .hero-section {
            background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.15) 0%, rgba(255, 255, 255, 0) 50%),
                        linear-gradient(135deg, #F3F4F6 0%, #FFFFFF 100%);
            padding: 120px 0 100px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
            pointer-events: none;
        }

        .hero-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 10;
        }

        .hero-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.9rem;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 25px;
            letter-spacing: 1px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        .hero-content h1 {
            font-size: 3rem;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 25px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }

        .hero-content h1 span {
            color: var(--primary-dark);
            background: linear-gradient(120deg, var(--primary-dark), #047857);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-content p {
            font-size: 1.25rem;
            color: var(--gray);
            margin-bottom: 40px;
            line-height: 1.8;
        }

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

        /* 数据指标卡片 */
        .stats-section {
            background-color: #FFFFFF;
            padding: 60px 0;
            border-bottom: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
        }

        .stat-card {
            background-color: var(--light);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .stat-value {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 1rem;
            color: var(--dark-soft);
            font-weight: 600;
            margin-bottom: 5px;
        }

        .stat-desc {
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* 关于我们 & 平台介绍 */
        .about-section {
            padding: 100px 0;
            background-color: var(--light);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 20px;
            font-weight: 700;
        }

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

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

        .about-feat-item {
            background-color: #FFFFFF;
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .about-feat-item h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .about-feat-item p {
            font-size: 0.9rem;
            color: var(--gray);
            margin: 0;
        }

        /* AIGC 服务板块 */
        .services-section {
            padding: 100px 0;
            background-color: #FFFFFF;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--light);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: transparent;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .service-card:hover::before {
            background-color: var(--primary);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 25px;
            color: var(--primary-dark);
            display: inline-block;
        }

        .service-card h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 15px;
            font-weight: 700;
        }

        .service-card p {
            color: var(--gray);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .service-tag {
            font-size: 0.75rem;
            background-color: #FFFFFF;
            border: 1px solid var(--border);
            color: var(--dark-soft);
            padding: 4px 10px;
            border-radius: 4px;
        }

        /* 一站式制作 / 标准化流程 */
        .process-section {
            padding: 100px 0;
            background-color: var(--light);
        }

        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            position: relative;
        }

        .process-step {
            background-color: #FFFFFF;
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
        }

        .process-step:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .step-num {
            width: 45px;
            height: 45px;
            background-color: var(--primary);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
        }

        .process-step h3 {
            font-size: 1.15rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 0.9rem;
            color: var(--gray);
            margin: 0;
        }

        /* 行业解决方案 */
        .solutions-section {
            padding: 100px 0;
            background-color: #FFFFFF;
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }

        .solution-card {
            background-color: var(--light);
            border-radius: 16px;
            padding: 35px;
            border: 1px solid var(--border);
        }

        .solution-card h3 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 15px;
            border-left: 4px solid var(--primary);
            padding-left: 12px;
        }

        .solution-card p {
            color: var(--gray);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .solution-list {
            list-style: none;
        }

        .solution-list li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--dark-soft);
        }

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

        /* 全国服务网络 */
        .network-section {
            padding: 100px 0;
            background-color: var(--light);
        }

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

        .network-info h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

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

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

        .network-item {
            background-color: #FFFFFF;
            padding: 15px;
            border-radius: 8px;
            border: 1px solid var(--border);
            text-align: center;
        }

        .network-item strong {
            display: block;
            color: var(--primary-dark);
            font-size: 1.1rem;
            margin-bottom: 5px;
        }

        .network-item span {
            font-size: 0.85rem;
            color: var(--gray);
        }

        .timeline {
            border-left: 3px solid var(--primary-light);
            padding-left: 20px;
            margin-left: 10px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }

        .timeline-item::before {
            content: '';
            width: 12px;
            height: 12px;
            background-color: var(--primary);
            border-radius: 50%;
            position: absolute;
            left: -28px;
            top: 6px;
            border: 2px solid #FFFFFF;
        }

        .timeline-item h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .timeline-item p {
            font-size: 0.9rem;
            color: var(--gray);
            margin: 0;
        }

        /* 客户案例中心 - 图片展示 */
        .cases-section {
            padding: 100px 0;
            background-color: #FFFFFF;
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
        }

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

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .case-image-wrapper {
            position: relative;
            overflow: hidden;
            background-color: #E5E7EB;
            aspect-ratio: 16 / 9;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .case-info {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: bold;
            padding: 3px 10px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .case-info h3 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .case-info p {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 15px;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 15px;
            font-size: 0.85rem;
            color: var(--gray);
        }

        /* 对比评测板块 */
        .compare-section {
            padding: 100px 0;
            background-color: var(--light);
        }

        .rating-box {
            background-color: #FFFFFF;
            border: 2px solid var(--primary);
            border-radius: 16px;
            padding: 40px;
            margin-bottom: 50px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
            box-shadow: var(--shadow-md);
        }

        .rating-score {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .score-num {
            font-size: 4rem;
            font-weight: 900;
            color: var(--primary-dark);
            line-height: 1;
        }

        .score-info h4 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .score-stars {
            color: #F59E0B;
            font-size: 1.4rem;
        }

        .rating-verdict {
            font-size: 1.1rem;
            color: var(--dark-soft);
            max-width: 500px;
            line-height: 1.7;
        }

        .compare-table-wrapper {
            width: 100%;
            overflow-x: auto;
            background-color: #FFFFFF;
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        .compare-table th, .compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border);
        }

        .compare-table th {
            background-color: var(--light);
            color: var(--dark);
            font-weight: 7550;
        }

        .compare-table tr:last-child td {
            border-bottom: none;
        }

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

        .feature-check {
            color: var(--success);
            font-weight: bold;
        }

        .feature-cross {
            color: var(--gray);
        }

        /* Token 比价 */
        .token-section {
            padding: 100px 0;
            background-color: #FFFFFF;
        }

        .token-intro {
            background-color: var(--light);
            border-radius: 16px;
            padding: 30px;
            margin-bottom: 40px;
            border-left: 6px solid var(--primary);
        }

        .token-intro h3 {
            margin-bottom: 10px;
            color: var(--dark);
        }

        .token-intro p {
            color: var(--gray);
            font-size: 0.95rem;
        }

        .models-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
            justify-content: center;
        }

        .model-tag {
            background-color: var(--light);
            border: 1px solid var(--border);
            color: var(--dark-soft);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 550;
            transition: var(--transition);
        }

        .model-tag:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary);
            transform: scale(1.05);
        }

        .token-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .token-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .token-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .token-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 15px;
        }

        .token-name {
            font-weight: bold;
            font-size: 1.15rem;
            color: var(--dark);
        }

        .token-badge {
            font-size: 0.75rem;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: bold;
        }

        .token-price {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 15px;
        }

        .token-price span {
            font-size: 0.85rem;
            color: var(--gray);
            font-weight: normal;
        }

        .token-features {
            font-size: 0.85rem;
            color: var(--gray);
        }

        .token-features li {
            margin-bottom: 8px;
        }

        /* 培训中心 */
        .training-section {
            padding: 100px 0;
            background-color: var(--light);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 30px;
        }

        .course-card {
            background-color: #FFFFFF;
            border-radius: 16px;
            padding: 35px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .course-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .course-auth {
            font-size: 0.8rem;
            color: #F59E0B;
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 10px;
            display: block;
        }

        .course-card h3 {
            font-size: 1.35rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .course-details {
            margin-bottom: 25px;
            font-size: 0.9rem;
            color: var(--gray);
        }

        .course-details li {
            margin-bottom: 8px;
            padding-left: 15px;
            position: relative;
        }

        .course-details li::before {
            content: '•';
            color: var(--primary);
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* 资讯 / 知识库 */
        .news-section {
            padding: 100px 0;
            background-color: #FFFFFF;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

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

        .news-card h3 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 15px;
            line-height: 1.5;
        }

        .news-desc {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .news-link {
            font-size: 0.9rem;
            color: var(--primary-dark);
            font-weight: bold;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

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

        /* 用户评论 */
        .reviews-section {
            padding: 100px 0;
            background-color: var(--light);
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

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

        .review-content {
            font-size: 0.95rem;
            color: var(--dark-soft);
            font-style: italic;
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .author-avatar {
            width: 45px;
            height: 45px;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.1rem;
        }

        .author-info h4 {
            font-size: 0.95rem;
            color: var(--dark);
            margin-bottom: 2px;
        }

        .author-info p {
            font-size: 0.8rem;
            color: var(--gray);
        }

        /* 智能需求匹配与表单 */
        .form-section {
            padding: 100px 0;
            background-color: #FFFFFF;
        }

        .form-container-box {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            background-color: var(--light);
            border-radius: 20px;
            padding: 50px;
            border: 1px solid var(--border);
        }

        .form-info h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .form-info p {
            color: var(--gray);
            margin-bottom: 30px;
        }

        .form-contacts {
            margin-bottom: 30px;
        }

        .form-contacts-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .form-contacts-icon {
            color: var(--primary);
            font-size: 1.2rem;
        }

        .form-qrcode {
            display: flex;
            align-items: center;
            gap: 20px;
            background-color: #FFFFFF;
            padding: 15px;
            border-radius: 12px;
            border: 1px solid var(--border);
            max-width: 320px;
        }

        .form-qrcode img {
            width: 80px;
            height: 80px;
            object-fit: cover;
        }

        .form-qrcode p {
            margin: 0;
            font-size: 0.85rem;
            color: var(--dark-soft);
        }

        .form-qrcode strong {
            display: block;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .contact-form {
            background-color: #FFFFFF;
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
        }

        /* AI术语百科 & FAQ 折叠面板 */
        .faq-wiki-section {
            padding: 100px 0;
            background-color: var(--light);
        }

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

        .wiki-card {
            background-color: #FFFFFF;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border);
            height: fit-content;
        }

        .wiki-card h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin-bottom: 25px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 15px;
        }

        .wiki-item {
            margin-bottom: 20px;
        }

        .wiki-item h4 {
            font-size: 1.05rem;
            color: var(--primary-dark);
            margin-bottom: 6px;
        }

        .wiki-item p {
            font-size: 0.9rem;
            color: var(--gray);
            margin: 0;
        }

        .faq-container {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background-color: #FFFFFF;
            border-radius: 8px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-header::after {
            content: '+';
            font-size: 1.3rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-header::after {
            content: '−';
            transform: rotate(90deg);
        }

        .faq-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--gray);
            font-size: 0.95rem;
            border-top: 1px solid transparent;
        }

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

        /* 友情链接与页脚 */
        footer {
            background-color: var(--dark);
            color: #F9FAFB;
            padding: 80px 0 30px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand h4 {
            color: #FFFFFF;
            font-size: 1.2rem;
            margin-bottom: 20px;
        }

        .footer-brand p {
            color: #9CA3AF;
            margin-bottom: 20px;
        }

        .footer-links h4 {
            color: #FFFFFF;
            font-size: 1.05rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-links h4::after {
            content: '';
            display: block;
            width: 30px;
            height: 2px;
            background-color: var(--primary);
            margin-top: 5px;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: #9CA3AF;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }

        .footer-qrcode-group {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .footer-qr-item {
            text-align: center;
        }

        .footer-qr-item img {
            width: 90px;
            height: 90px;
            border-radius: 6px;
            margin-bottom: 8px;
            border: 2px solid rgba(255,255,255,0.1);
        }

        .footer-qr-item span {
            display: block;
            font-size: 0.75rem;
            color: #9CA3AF;
        }

        .friendly-links-section {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 30px 0;
            margin-bottom: 30px;
        }

        .friendly-links-title {
            color: #FFFFFF;
            font-weight: 600;
            margin-bottom: 15px;
            font-size: 0.95rem;
        }

        .friendly-links-container {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friendly-links-container a {
            color: #9CA3AF;
            font-size: 0.85rem;
            background-color: rgba(255,255,255,0.05);
            padding: 4px 12px;
            border-radius: 4px;
        }

        .friendly-links-container a:hover {
            color: var(--primary);
            background-color: rgba(255,255,255,0.1);
        }

        .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;
            color: #9CA3AF;
            font-size: 0.8rem;
        }

        .ai-page-home-link {
            color: var(--primary);
            font-weight: bold;
        }

        /* 侧边浮动客服区 */
        .floating-service {
            position: fixed;
            right: 25px;
            bottom: 25px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .float-btn:hover {
            transform: scale(1.1);
            background-color: var(--primary-dark);
        }

        .float-popover {
            position: absolute;
            right: 65px;
            bottom: 0;
            background-color: #FFFFFF;
            border-radius: 12px;
            padding: 15px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            width: 180px;
            display: none;
            text-align: center;
            color: var(--dark);
        }

        .float-popover img {
            width: 120px;
            height: 120px;
            margin: 0 auto 10px;
        }

        .float-popover p {
            font-size: 0.75rem;
            color: var(--gray);
            margin: 0;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .about-grid, .network-content, .form-container-box, .faq-wiki-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: #FFFFFF;
                border-top: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                padding: 20px;
                gap: 15px;
            }

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

            .menu-toggle {
                display: block;
            }

            .hero-content h1 {
                font-size: 2.2rem;
            }

            .hero-content p {
                font-size: 1.05rem;
            }

            .rating-box {
                flex-direction: column;
                text-align: center;
            }
        }