/* 基础变量定义 - 艳色潮流浅色风 */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #ec4899;
            --accent: #06b6d4;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --text-light: #64748b;
            --border-color: #e2e8f0;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
            --shadow-md: 0 10px 25px -5px rgba(99, 102, 241, 0.1), 0 8px 10px -6px rgba(99, 102, 241, 0.05);
            --shadow-lg: 0 20px 30px -10px rgba(236, 72, 153, 0.15);
            --radius-md: 12px;
            --radius-lg: 20px;
            --container-width: 1200px;
        }

        * {
            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;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* 统一容器控制 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 统一标题样式 */
        .section-header {
            text-align: center;
            margin-bottom: 45px;
        }
        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 650px;
            margin: 0 auto;
        }

        /* 按钮通用 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }
        .btn-vibrant {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #ffffff !important;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
        }
        .btn-vibrant:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(236, 72, 153, 0.45);
        }
        .btn-outline {
            background: #ffffff;
            color: var(--text-main);
            border: 2px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* 顶部导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            padding: 15px 0;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-box {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
            object-fit: contain;
        }
        .nav-links {
            display: flex;
            gap: 0; /* 约束要求 gap 必须为 0 */
            list-style: none;
            align-items: center;
        }
        .nav-links li a {
            padding: 8px 14px;
            text-decoration: none;
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
            display: block;
        }
        .nav-links li a:hover {
            color: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* Hero 区域 (无图片) */
        .hero-section {
            padding: 90px 0 70px 0;
            background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.05) 50%, rgba(255, 255, 255, 0) 100%);
            text-align: center;
        }
        .hero-badge-group {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .hero-badge {
            background: rgba(99, 102, 241, 0.08);
            border: 1px solid rgba(99, 102, 241, 0.2);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
        }
        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 35px auto;
        }
        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 950px;
            margin: 0 auto;
        }
        .stat-card {
            background: #ffffff;
            padding: 24px 15px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            text-align: center;
        }
        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* 关于与平台介绍 */
        .section-padding {
            padding: 70px 0;
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1rem;
        }
        .feature-pill-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }
        .pill-item {
            background: #ffffff;
            padding: 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .pill-item h4 {
            font-size: 1rem;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }
        .pill-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin: 0;
        }

        /* AIGC 服务矩阵 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 22px;
        }
        .service-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }
        .service-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .service-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-card {
            background: #ffffff;
            padding: 28px 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            text-align: center;
            position: relative;
        }
        .step-num {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 16px auto;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 对比评测表 */
        .compare-box {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 30px;
            box-shadow: var(--shadow-md);
        }
        .compare-header-score {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(236, 72, 153, 0.05));
            padding: 20px 30px;
            border-radius: var(--radius-md);
            margin-bottom: 25px;
        }
        .score-title {
            font-size: 1.1rem;
            font-weight: 700;
        }
        .score-val {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--secondary);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .compare-table th, .compare-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
        }
        .compare-table th {
            background: #f1f5f9;
            color: var(--text-main);
            font-weight: 700;
        }
        .tag-good {
            color: #10b981;
            font-weight: 700;
        }
        .tag-bad {
            color: #ef4444;
        }

        /* Token 比价卡 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .token-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px;
            text-align: center;
        }
        .token-name {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }
        .token-price {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 10px;
        }
        .token-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 案例图文展示 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .case-img-box {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #e2e8f0;
        }
        .ai-page-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .case-info {
            padding: 18px;
        }
        .case-info h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .case-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 用户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .review-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 22px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .avatar-placeholder {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .reviewer-name {
            font-weight: 700;
            font-size: 0.95rem;
        }
        .reviewer-role {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .review-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-style: italic;
        }

        /* FAQ 折叠 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #ffffff;
        }
        .faq-answer {
            padding: 0 24px 18px 24px;
            color: var(--text-muted);
            font-size: 0.92rem;
            display: none;
            border-top: 1px solid #f1f5f9;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-toggle {
            color: var(--primary);
            font-size: 1.2rem;
        }

        /* 表单与联系方式 */
        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px;
            box-shadow: var(--shadow-md);
        }
        .contact-form .form-group {
            margin-bottom: 18px;
        }
        .contact-form label {
            display: block;
            margin-bottom: 6px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .contact-form input, .contact-form select, .contact-form textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            background: #f8fafc;
        }
        .contact-form input:focus, .contact-form textarea:focus {
            border-color: var(--primary);
            background: #ffffff;
        }
        .qr-box {
            text-align: center;
            padding: 20px;
            background: rgba(99, 102, 241, 0.04);
            border-radius: var(--radius-md);
            border: 1px dashed var(--primary);
        }
        .qr-box img {
            width: 140px;
            height: 140px;
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 8px;
        }

        /* 文章列表区 */
        .articles-box {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 25px;
            border: 1px solid var(--border-color);
        }
        .article-link-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            list-style: none;
            margin-top: 10px;
        }
        .article-link-list a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            background: rgba(99, 102, 241, 0.08);
            padding: 6px 14px;
            border-radius: 6px;
            font-size: 0.88rem;
        }
        .article-link-list a:hover {
            background: var(--primary);
            color: #ffffff;
        }

        /* 页脚 */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 50px 0 30px 0;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 35px;
        }
        .footer-brand h4 {
            color: #ffffff;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-links-title {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .friend-links a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 0.85rem;
        }
        .friend-links a:hover {
            color: var(--secondary);
        }
        .copyright-bar {
            text-align: center;
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            font-size: 0.85rem;
            color: #64748b;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
            .about-grid, .contact-wrap { grid-template-columns: 1fr; }
            .process-steps, .token-grid, .cases-grid, .reviews-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2rem; }
            .process-steps, .token-grid, .cases-grid, .reviews-grid { grid-template-columns: 1fr; }
            .nav-links { display: none; } /* 移动端可隐藏或切换 */
            .feature-pill-list { grid-template-columns: 1fr; }
        }