:root {
            --primary: #0f52ba; /* 宝蓝 */
            --primary-light: #2563eb;
            --accent: #00d2ff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-base: #f8fafc;
            --bg-card: #ffffff;
            --border: #e2e8f0;
            --container-w: 1200px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        .container {
            width: 100%;
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

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

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

        .nav-links a {
            font-size: 0.925rem;
            color: var(--text-muted);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
        }

        .nav-links a:hover {
            color: var(--primary);
            background-color: rgba(15, 82, 186, 0.05);
        }

        .nav-btn {
            background-color: var(--primary);
            color: #fff;
            padding: 8px 20px;
            border-radius: 6px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .nav-btn:hover {
            background-color: var(--primary-light);
            box-shadow: 0 4px 12px rgba(15, 82, 186, 0.2);
            color: #fff;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: none;
            padding: 4px;
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-main);
            transition: 0.3s;
        }

        /* Hero首屏 - 严禁出现图片 */
        .hero {
            background: linear-gradient(135deg, #0a1931 0%, #15305b 50%, #0f52ba 100%);
            color: #ffffff;
            padding: 100px 0 120px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 210, 255, 0.15);
            border: 1px solid rgba(0, 210, 255, 0.3);
            color: var(--accent);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 1px;
            animation: fadeInDown 0.8s ease;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }

        .hero-desc {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 800px;
            margin: 0 auto 40px;
            font-weight: 300;
            line-height: 1.7;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background-color: var(--accent);
            color: #0a1931;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 4px 15px rgba(0, 210, 255, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 210, 255, 0.6);
            color: #0a1931;
        }

        .btn-secondary {
            background-color: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #ffffff;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1.05rem;
        }

        .btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        /* 核心数据卡片 */
        .stats-section {
            margin-top: -60px;
            position: relative;
            z-index: 10;
        }

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

        .stat-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(15, 82, 186, 0.08);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

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

        .stat-num {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.875rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 通用区块样式 */
        section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border);
        }

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

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .about-text p {
            margin-bottom: 20px;
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.7;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .about-feat-item {
            background-color: var(--bg-base);
            padding: 16px;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
        }

        .about-feat-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

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

        /* 全平台AIGC服务 & 模型展示 */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 30px;
        }

        .model-tag {
            background-color: #e0f2fe;
            color: #0369a1;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.875rem;
            font-weight: 600;
            border: 1px solid #bae6fd;
            transition: all 0.3s;
        }

        .model-tag:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
        }

        /* 一站式制作 */
        .creation-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .creation-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s;
        }

        .creation-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(15, 82, 186, 0.08);
            border-color: var(--primary-light);
        }

        .creation-icon {
            width: 48px;
            height: 48px;
            background: rgba(15, 82, 186, 0.1);
            color: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .creation-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            font-weight: 700;
        }

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

        /* 全行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .sol-card {
            background: linear-gradient(to bottom, #ffffff, #f1f5f9);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 24px;
            text-align: center;
        }

        .sol-card h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--primary);
        }

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

        /* 流程步骤与技术标准 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .step-item {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.25rem;
            margin: 0 auto 16px;
            box-shadow: 0 4px 10px rgba(15, 82, 186, 0.3);
        }

        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

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

        /* 案例中心 (包含指定图片，确保安全排版) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: 0.3s;
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: 0.3s;
        }

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

        .case-content {
            padding: 20px;
        }

        .case-tag {
            display: inline-block;
            background-color: rgba(15, 82, 186, 0.1);
            color: var(--primary);
            font-size: 0.75rem;
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .case-content h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

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

        /* 对比评测 - 9.9分五星 */
        .compare-section {
            background-color: #f1f5f9;
        }

        .compare-wrapper {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }

        .compare-score-box {
            background-color: var(--primary);
            color: #fff;
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            box-shadow: 0 15px 35px rgba(15, 82, 186, 0.2);
        }

        .compare-score-box h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .score-num {
            font-size: 4rem;
            font-weight: 900;
            line-height: 1;
            margin-bottom: 10px;
            color: var(--accent);
        }

        .stars {
            color: #f59e0b;
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .compare-table-container {
            background-color: #fff;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: 0 10px 25px rgba(0,0,0,0.02);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
        }

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

        .compare-table th {
            background-color: #f8fafc;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .compare-table td.highlight {
            color: var(--primary);
            font-weight: 700;
        }

        /* Token比价参考 */
        .token-table-container {
            background: #fff;
            border-radius: 12px;
            overflow-x: auto;
            border: 1px solid var(--border);
        }

        .token-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }

        .token-table th, .token-table td {
            padding: 14px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border);
        }

        .token-table th {
            background-color: #f8fafc;
            font-weight: 700;
        }

        /* 培训板块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .train-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: 0.3s;
        }

        .train-card:hover {
            border-color: var(--primary);
            box-shadow: 0 6px 15px rgba(15, 82, 186, 0.05);
        }

        .train-icon {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .train-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

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

        /* 术语百科与排查 */
        .encyclopedia-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .ency-card {
            background: #fff;
            border-radius: 10px;
            padding: 24px;
            border: 1px solid var(--border);
        }

        .ency-card h3 {
            font-size: 1.15rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

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

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.3s;
        }

        .faq-question:hover {
            background-color: #f8fafc;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.25rem;
            font-weight: 300;
            color: var(--primary);
        }

        .faq-item.active .faq-question::after {
            content: '-';
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--text-muted);
            font-size: 0.9rem;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            padding: 16px 24px;
            max-height: 200px;
            border-top-color: var(--border);
        }

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

        .review-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
        }

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

        .reviewer-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .reviewer-meta h4 {
            font-size: 0.9rem;
            font-weight: 700;
        }

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

        .review-text {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 行业资讯 / 知识库 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .article-item {
            background-color: #fff;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }

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

        .article-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            align-self: flex-start;
            margin-top: 12px;
        }

        /* 表单与联系我们 */
        .contact-section {
            background-color: #0f172a;
            color: #fff;
            border-bottom: none;
        }

        .contact-section .section-header h2 {
            color: #fff;
        }

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

        .form-container {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 35px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 0.875rem;
            color: #cbd5e1;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            background-color: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            color: #fff;
            font-size: 0.9rem;
            outline: none;
        }

        .form-control:focus {
            border-color: var(--accent);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .btn-submit {
            background-color: var(--accent);
            color: #0f172a;
            border: none;
            width: 100%;
            padding: 14px;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 6px;
            cursor: pointer;
            transition: 0.3s;
        }

        .btn-submit:hover {
            background-color: #00e1ff;
        }

        .contact-info-area {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .info-item {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
        }

        .info-icon {
            width: 44px;
            height: 44px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
        }

        .info-detail h4 {
            font-size: 0.85rem;
            color: #94a3b8;
        }

        .info-detail p {
            font-size: 1rem;
            font-weight: 600;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
        }

        .qr-item {
            text-align: center;
            background: rgba(255, 255, 255, 0.05);
            padding: 12px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .qr-item img {
            width: 100px;
            height: 100px;
            object-fit: cover;
            border-radius: 4px;
            margin-bottom: 6px;
        }

        .qr-item p {
            font-size: 0.75rem;
            color: #cbd5e1;
        }

        /* 友情链接与底部导航 */
        .footer-links-section {
            background-color: #090d16;
            color: #94a3b8;
            padding: 40px 0;
            border-bottom: 1px solid #1e293b;
        }

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

        .friend-links h4, .footer-menu h4 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 0.95rem;
            font-weight: 700;
        }

        .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 18px;
        }

        .friend-links-list a {
            color: #94a3b8;
            font-size: 0.85rem;
        }

        .friend-links-list a:hover {
            color: var(--accent);
        }

        .footer-menu-list {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
        }

        .footer-menu-list a {
            color: #94a3b8;
            font-size: 0.85rem;
        }

        .footer-menu-list a:hover {
            color: var(--accent);
        }

        /* 页脚版权 */
        footer {
            background-color: #090d16;
            color: #64748b;
            padding: 24px 0;
            text-align: center;
            font-size: 0.8rem;
        }

        footer p {
            margin-bottom: 8px;
        }

        /* 浮动客服入口 */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: 0.3s;
            position: relative;
        }

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

        .float-qr-box {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: #fff;
            border: 1px solid var(--border);
            padding: 12px;
            border-radius: 8px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
        }

        .float-qr-box img {
            width: 120px;
            height: 120px;
            object-fit: cover;
            margin-bottom: 6px;
        }

        .float-qr-box p {
            font-size: 0.75rem;
            color: var(--text-main);
            white-space: nowrap;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .creation-grid {
                grid-template-columns: 1fr 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .case-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }

            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: #fff;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }

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

            .about-grid, .compare-wrapper, .contact-grid, .footer-links-grid, .encyclopedia-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid, .creation-grid, .training-grid, .case-grid, .articles-list, .solutions-grid, .steps-container {
                grid-template-columns: 1fr;
            }

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

            .hero-desc {
                font-size: 1rem;
            }

            .compare-score-box {
                padding: 24px;
            }
        }