:root {
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
      --bg-base: #f7f9fc;
      --card-bg: #ffffff;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --border-color: #e2e8f0;
      --primary-color: #3b82f6;
      --rainbow-gradient: linear-gradient(135deg, rgba(239,68,68,0.12) 0%, rgba(249,115,22,0.12) 15%, rgba(234,179,8,0.12) 30%, rgba(34,197,94,0.12) 50%, rgba(6,182,212,0.12) 70%, rgba(59,130,246,0.12) 85%, rgba(168,85,247,0.12) 100%);
      --btn-gradient: linear-gradient(135deg, #f97316 0%, #ec4899 50%, #3b82f6 100%);
      --badge-gradient: linear-gradient(90deg, #ef4444, #f59e0b, #10b981, #06b6d4, #8b5cf6);
      --container-max: 1200px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
      --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.1);
      --radius: 12px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(249, 115, 22, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(16, 185, 129, 0.04) 0%, transparent 45%);
      background-attachment: fixed;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-area img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .logo-text {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(120deg, #ea580c, #0284c7, #9333ea);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }
    nav.nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    nav.nav-links a {
      font-size: 0.92rem;
      font-weight: 500;
      color: #334155;
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s ease, background-color 0.2s ease;
    }
    nav.nav-links a:hover {
      color: #2563eb;
      background-color: #f1f5f9;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--btn-gradient);
      color: #ffffff !important;
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 600;
      box-shadow: 0 3px 10px rgba(236, 72, 153, 0.25);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .btn-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 15px rgba(236, 72, 153, 0.35);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 6px 10px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1.2rem;
    }

    /* 模块通用样式 */
    section.section-block {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      padding: 4px 12px;
      border-radius: 30px;
      background: #e0f2fe;
      color: #0284c7;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 1. 首屏 Hero 区域 (无图片) */
    .hero-section {
      padding: 90px 0 70px;
      background: var(--rainbow-gradient);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      position: relative;
      overflow: hidden;
    }
    .hero-content {
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #fed7aa;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #c2410c;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.7rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }
    .hero-title .rainbow-accent {
      background: linear-gradient(90deg, #ea580c 0%, #db2777 40%, #2563eb 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #475569;
      line-height: 1.7;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-main-official {
      background: #2563eb;
      color: #ffffff !important;
      font-size: 1.05rem;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 30px;
      box-shadow: 0 4px 18px rgba(37, 99, 235, 0.35);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-main-official:hover {
      background: #1d4ed8;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
    }
    .btn-sub-action {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      color: #334155;
      font-size: 1.05rem;
      font-weight: 600;
      padding: 14px 30px;
      border-radius: 30px;
      transition: all 0.2s ease;
    }
    .btn-sub-action:hover {
      background: #f8fafc;
      border-color: #94a3b8;
      color: #0f172a;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: 16px;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(226, 232, 240, 0.9);
    }
    .metric-card {
      text-align: center;
    }
    .metric-card .num {
      font-size: 1.8rem;
      font-weight: 800;
      color: #1e293b;
      display: block;
      margin-bottom: 4px;
    }
    .metric-card .label {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 2. 平台介绍板块 */
    .platform-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .plat-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      position: relative;
      overflow: hidden;
    }
    .plat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--badge-gradient);
      opacity: 0;
      transition: opacity 0.2s ease;
    }
    .plat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .plat-card:hover::before {
      opacity: 1;
    }
    .plat-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: #eff6ff;
      color: #2563eb;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }
    .plat-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #1e293b;
    }
    .plat-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 模型矩阵展示 */
    .models-matrix {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-tag {
      padding: 8px 16px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #334155;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: #eff6ff;
      border-color: #93c5fd;
      color: #1d4ed8;
      transform: scale(1.03);
    }

    /* 4. AIGC核心服务与一站式制作 (卡片网格) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-box {
      background: #ffffff;
      border: 1px solid #f1f5f9;
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border-top: 3px solid #3b82f6;
    }
    .service-box:nth-child(2n) {
      border-top-color: #ec4899;
    }
    .service-box:nth-child(3n) {
      border-top-color: #10b981;
    }
    .service-box h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }
    .service-box p {
      font-size: 0.92rem;
      color: #64748b;
      line-height: 1.55;
    }

    /* 5. 流程步骤组件 */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      position: relative;
    }
    .step-num {
      width: 42px;
      height: 42px;
      line-height: 42px;
      border-radius: 50%;
      background: #3b82f6;
      color: #fff;
      font-weight: 800;
      margin: 0 auto 16px;
    }
    .step-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 6. 对比评测模块 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
      border: 1px solid #fdba74;
      border-radius: 12px;
      padding: 24px 32px;
      margin-bottom: 30px;
    }
    .rating-left h3 {
      font-size: 1.4rem;
      color: #9a3412;
      margin-bottom: 4px;
    }
    .rating-left p {
      color: #c2410c;
      font-size: 0.95rem;
    }
    .rating-score {
      text-align: right;
    }
    .rating-score .score {
      font-size: 2.8rem;
      font-weight: 900;
      color: #ea580c;
      line-height: 1;
    }
    .rating-score .stars {
      color: #f59e0b;
      font-size: 1.2rem;
      margin-top: 4px;
    }
    .compare-table-wrapper {
      width: 100%;
      overflow-x: auto;
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    table.compare-table th, table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.95rem;
    }
    table.compare-table th {
      background: #f8fafc;
      color: #334155;
      font-weight: 700;
    }
    table.compare-table tr:hover td {
      background: #fbfcfe;
    }
    .cell-highlight {
      font-weight: 700;
      color: #2563eb;
    }

    /* 7. 案例与素材图展示 */
    .media-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 32px;
    }
    .media-box {
      border-radius: var(--radius);
      overflow: hidden;
      background: #fff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .media-box img {
      width: 100%;
      display: block;
      height: 200px;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .media-box:hover img {
      transform: scale(1.03);
    }
    .media-desc {
      padding: 14px 18px;
    }
    .media-desc h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .media-desc p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 8. 用户评论板块 (6条) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .user-avatar-badge {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0ea5e9, #6366f1);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .user-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #1e293b;
    }
    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-text {
      font-size: 0.9rem;
      color: #475569;
      line-height: 1.6;
    }

    /* 9. FAQ 折叠面板 */
    .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: 10px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-item.active {
      border-color: #93c5fd;
    }
    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1.02rem;
      color: #1e293b;
      user-select: none;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-icon {
      font-size: 1.1rem;
      color: #64748b;
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: #2563eb;
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid #f1f5f9;
      background: #fafcff;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 10. 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }
    .contact-info h3 {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .contact-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 0.95rem;
      color: #334155;
    }
    .qrcode-box {
      margin-top: 24px;
      padding: 16px;
      border: 1px dashed #cbd5e1;
      border-radius: 8px;
      display: inline-block;
      text-align: center;
      background: #f8fafc;
    }
    .qrcode-box img {
      width: 140px;
      height: 140px;
      display: block;
      margin-bottom: 8px;
    }
    .qrcode-box span {
      font-size: 0.85rem;
      color: #64748b;
      font-weight: 500;
    }
    .form-box form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-group input, .form-group select, .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      font-size: 0.95rem;
      font-family: inherit;
      color: #1e293b;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      border-color: #3b82f6;
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    }
    .btn-submit {
      background: var(--btn-gradient);
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: opacity 0.2s;
    }
    .btn-submit:hover {
      opacity: 0.95;
    }

    /* 11. 资讯与文章列表 */
    .article-layout {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }
    .article-links-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
    }
    .article-links-card h4 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 16px;
      padding-bottom: 10px;
      border-bottom: 1px solid #f1f5f9;
    }
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-list li a {
      font-size: 0.92rem;
      color: #334155;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: color 0.2s;
    }
    .article-list li a:hover {
      color: #2563eb;
    }

    /* 12. 友情链接与页脚 */
    .friendly-links-section {
      padding: 30px 0;
      background: #ffffff;
      border-top: 1px solid var(--border-color);
    }
    .friendly-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: #475569;
      margin-bottom: 12px;
    }
    .links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }
    .links-wrap a {
      font-size: 0.88rem;
      color: #64748b;
      transition: color 0.2s;
    }
    .links-wrap a:hover {
      color: #2563eb;
    }

    footer.site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 40px 0 24px;
      font-size: 0.88rem;
    }
    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid #1e293b;
    }
    .footer-brand {
      color: #f8fafc;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      font-size: 0.82rem;
      color: #64748b;
    }

    /* 浮动客服与返回顶部 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .tool-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #334155;
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: transform 0.2s, background-color 0.2s;
      font-size: 1.1rem;
    }
    .tool-btn:hover {
      transform: scale(1.1);
      background: #f8fafc;
      color: #2563eb;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .services-grid, .platform-features, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-gallery {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      nav.nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      nav.nav-links.show {
        display: flex;
      }
      .hero-title {
        font-size: 1.95rem;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .services-grid, .platform-features, .reviews-grid, .contact-wrapper, .article-layout, .media-gallery {
        grid-template-columns: 1fr;
      }
      .workflow-timeline {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
      .rating-score {
        text-align: center;
      }
    }