:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --accent-orange: #ff5722;
            --accent-cyan: #06b6d4;
            --accent-purple: #7c3aed;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(37,99,235,0.08);
            --shadow-lg: 0 16px 32px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
        }

        * {
            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-light);
            color: var(--text-main);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: all 0.25s ease;
        }

        a:hover {
            color: var(--accent-orange);
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

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

        .ai-page-logo {
            max-height: 44px;
            width: auto;
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0; /* 严格按照要求设置为 0 */
            list-style: none;
        }

        .nav-links li a {
            display: inline-block;
            padding: 8px 11px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .nav-links li a:hover,
        .nav-links li a.active {
            color: var(--primary);
            background-color: rgba(37, 99, 235, 0.06);
            border-radius: var(--radius-sm);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: all 0.25s ease;
            border: none;
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
            color: #ffffff !important;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent-orange) 0%, #ff7043 100%);
            color: #ffffff !important;
            box-shadow: 0 4px 14px rgba(255, 87, 34, 0.35);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 87, 34, 0.45);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary) !important;
        }

        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.05);
            transform: translateY(-2px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-main);
            cursor: pointer;
        }

        /* 首屏 HERO 区域 - 严格禁用图片 */
        .hero-section {
            padding: 90px 0 70px;
            background: linear-gradient(135deg, #ffffff 0%, #eff6ff 50%, #f0fdf4 100%);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -5%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, rgba(255,255,255,0) 70%);
            pointer-events: none;
        }

        .hero-wrapper {
            text-align: center;
            max-width: 960px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .hero-badge-group {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #ffffff;
            border: 1px solid rgba(37, 99, 235, 0.2);
            padding: 6px 16px;
            border-radius: 50px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 24px;
        }

        .badge-tag {
            background: var(--accent-orange);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 800;
            padding: 2px 8px;
            border-radius: 20px;
            text-transform: uppercase;
        }

        .badge-text {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-description {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-bottom: 36px;
            line-height: 1.7;
        }

        .hero-cta-box {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .hero-cta-box .btn {
            padding: 14px 32px;
            font-size: 1.05rem;
        }

        /* 纯数据卡片 - 无图 */
        .hero-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border-color);
            padding: 22px 16px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: transform 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .stat-num.highlight {
            color: var(--accent-orange);
        }

        .stat-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 公用 Section 样式 */
        .section-padding {
            padding: 80px 0;
            border-bottom: 1px solid #edf2f7;
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 800;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            background: rgba(37, 99, 235, 0.08);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
        }

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

        .about-content-box p {
            margin-bottom: 16px;
            color: var(--text-muted);
            font-size: 1.02rem;
            line-height: 1.8;
        }

        .feature-check-list {
            list-style: none;
            margin-top: 24px;
        }

        .feature-check-list li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 600;
            color: var(--text-main);
        }

        .feature-check-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 0;
            color: #10b981;
            font-weight: 900;
            font-size: 1.1rem;
        }

        .about-card-box {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            color: #ffffff;
            padding: 40px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .about-card-box h3 {
            font-size: 1.6rem;
            margin-bottom: 16px;
            color: #38bdf8;
        }

        .about-card-box p {
            color: #94a3b8;
            margin-bottom: 24px;
            line-height: 1.7;
        }

        /* 标签云与模型 */
        .model-tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .model-tag {
            background: rgba(255,255,255,0.1);
            color: #e2e8f0;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            border: 1px solid rgba(255,255,255,0.15);
        }

        .model-tag.hot {
            background: rgba(245, 158, 11, 0.2);
            color: #fbbf24;
            border-color: rgba(245, 158, 11, 0.4);
        }

        /* 服务与制作卡片 */
        .cards-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: #cbd5e1;
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .icon-box {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .service-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .service-desc {
            font-size: 0.94rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 案例图片区域 */
        .media-banner-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .media-item {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            background: #fff;
        }

        .ai-page-image {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }

        .media-caption {
            padding: 14px;
            font-weight: 700;
            font-size: 0.95rem;
            text-align: center;
            background: #fff;
            color: var(--text-main);
        }

        /* 对比评测表格 */
        .comparison-wrapper {
            background: var(--bg-card);
            border: 1fr solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 30px;
            overflow-x: auto;
        }

        .rating-banner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: linear-gradient(135deg, #eff6ff 0%, #e0f2fe 100%);
            border: 1px solid #bfdbfe;
            padding: 20px 30px;
            border-radius: var(--radius-md);
            margin-bottom: 30px;
        }

        .rating-score {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
        }

        .rating-stars {
            color: #f59e0b;
            font-size: 1.4rem;
        }

        .comp-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .comp-table th, .comp-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comp-table th {
            background: #f1f5f9;
            font-weight: 800;
            color: var(--text-main);
        }

        .comp-table tr.highlight-row {
            background: rgba(37, 99, 235, 0.03);
        }

        .comp-table td.brand-col {
            font-weight: 800;
            color: var(--primary);
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            border-radius: var(--radius-md);
            position: relative;
            text-align: center;
        }

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--accent-orange);
            color: #fff;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

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

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .user-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
        }

        .user-info h4 {
            font-size: 1rem;
            color: var(--text-main);
        }

        .user-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .review-text {
            font-size: 0.94rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ 手风琴 */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
        }

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

        .faq-header {
            width: 100%;
            padding: 20px 24px;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-header::after {
            content: "+";
            font-size: 1.4rem;
            color: var(--primary);
            transition: transform 0.3s ease;
        }

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

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 24px;
            background: #f8fafc;
            color: var(--text-muted);
            font-size: 0.96rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-body {
            max-height: 300px;
            padding: 16px 24px 24px;
        }

        /* 文章资讯与友链 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

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

        .article-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }

        /* 联系与表单 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .contact-info-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 36px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }

        .contact-item {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .contact-item strong {
            display: block;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .qr-box {
            margin-top: 20px;
            display: inline-block;
            padding: 12px;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            max-width: 160px;
        }

        .qr-box img {
            width: 100%;
            height: auto;
            display: block;
        }

        .form-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 36px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

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

        .form-group label {
            display: block;
            font-weight: 700;
            margin-bottom: 8px;
            font-size: 0.92rem;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            background: #f8fafc;
            color: var(--text-main);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }

        textarea.form-control {
            height: 110px;
            resize: vertical;
        }

        /* 页脚 */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
        }

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

        .footer-col h4 {
            color: #ffffff;
            font-size: 1.05rem;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: #94a3b8;
        }

        .footer-links a:hover {
            color: #ffffff;
        }

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

        .friend-links-box a {
            color: #94a3b8;
            background: rgba(255,255,255,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.84rem;
        }

        .friend-links-box a:hover {
            color: #fff;
            background: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            text-align: center;
            font-size: 0.85rem;
        }

        /* 悬浮客服 */
        .floating-widget {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            font-weight: 800;
            font-size: 1.2rem;
            cursor: pointer;
        }

        .float-btn.accent {
            background: var(--accent-orange);
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .nav-links { display: none; }
            .mobile-toggle { display: block; }
            .cards-grid-4, .hero-stats-grid, .process-steps { grid-template-columns: repeat(2, 1fr); }
            .cards-grid-3, .reviews-grid, .media-banner-grid { grid-template-columns: 1fr; }
            .about-grid, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 640px) {
            .hero-title { font-size: 2rem; }
            .hero-stats-grid, .cards-grid-4, .process-steps { grid-template-columns: 1fr; }
            .articles-list { grid-template-columns: 1fr; }
        }