/* 全局重置与变量声明 - 艳红热烈视觉风格 */
    :root {
      --primary-color: #DC2626;
      --primary-hover: #B91C1C;
      --primary-light: #FEF2F2;
      --secondary-color: #D97706;
      --accent-gold: #F59E0B;
      --text-dark: #1E293B;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --bg-main: #FAFAFB;
      --bg-white: #FFFFFF;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --border-red: #FECACA;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(220, 38, 38, 0.06);
      --shadow-md: 0 8px 24px rgba(220, 38, 38, 0.08);
      --shadow-hover: 0 12px 32px rgba(220, 38, 38, 0.15);
      --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, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background-color: var(--bg-main);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    /* 统一主容器布局 */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .header-bar {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }

    /* 导航链接 - CSS gap必须为0 */
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-color);
      background-color: var(--primary-light);
    }

    .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: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-color), #B91C1C);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(220, 38, 38, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #991B1B, var(--primary-color));
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
    }

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

    .btn-outline:hover {
      background-color: var(--primary-light);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* 首屏 HERO 区域 - 严禁出现图片 */
    .hero-section {
      position: relative;
      padding: 80px 0 60px;
      background: linear-gradient(135deg, #FFF5F5 0%, #FEF2F2 50%, #FFFBEB 100%);
      border-bottom: 1px solid var(--border-red);
      text-align: center;
      overflow: hidden;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -100px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(220, 38, 38, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: #FFFFFF;
      border: 1px solid var(--border-red);
      border-radius: 30px;
      color: var(--primary-color);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      color: #111827;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary-color);
      background: linear-gradient(135deg, #DC2626 0%, #D97706 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      max-width: 820px;
      margin: 0 auto 36px;
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-cta-btn {
      padding: 14px 36px;
      font-size: 1.05rem;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .hero-stat-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(220, 38, 38, 0.15);
      padding: 20px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(5px);
    }

    .hero-stat-num {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1.2;
    }

    .hero-stat-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 模块通用样式 */
    .section-padding {
      padding: 80px 0;
    }

    .section-bg-white {
      background-color: var(--bg-white);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary-color);
      background-color: var(--primary-light);
      border-radius: 4px;
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

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

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

    .about-text p {
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .about-feature-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .about-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
      color: var(--text-dark);
      font-size: 0.95rem;
    }

    .about-feature-item::before {
      content: '✓';
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      border-radius: 50%;
      font-size: 0.75rem;
    }

    .about-card-box {
      background: linear-gradient(145deg, #FFFFFF, #FFF5F5);
      border: 1px solid var(--border-red);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    /* 模型阵列展示 */
    .models-badge-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .model-chip {
      padding: 6px 14px;
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-dark);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background-color: var(--primary-light);
    }

    /* AIGC 服务卡片网格 (包含30个细分场景) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

    .service-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 24px;
      border-radius: var(--radius-md);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--border-red);
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.25rem;
      margin-bottom: 16px;
    }

    .service-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .service-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      flex-grow: 1;
      line-height: 1.6;
    }

    /* 对比评测 - 5星与9.9分 */
    .rating-banner {
      background: linear-gradient(135deg, #1E293B, #0F172A);
      color: #FFFFFF;
      padding: 40px;
      border-radius: var(--radius-lg);
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

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

    .score-number {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--accent-gold);
      line-height: 1;
    }

    .score-details {
      display: flex;
      flex-direction: column;
    }

    .stars-icon {
      color: #F59E0B;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

    .score-label {
      font-size: 0.9rem;
      color: #94A3B8;
      margin-top: 4px;
    }

    .compare-table-wrapper {
      overflow-x: auto;
      background-color: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

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

    .compare-table th {
      background-color: #F8FAFC;
      font-weight: 700;
      color: var(--text-dark);
    }

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

    /* 标准流程 步骤 */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .process-step-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 20px 16px;
      border-radius: var(--radius-md);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background-color: var(--primary-color);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 12px;
    }

    .step-title {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .step-desc {
      font-size: 0.825rem;
      color: var(--text-muted);
    }

    /* Token 比价表 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 20px;
    }

    .token-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      transition: all 0.3s ease;
    }

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

    .token-model-name {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-dark);
    }

    .token-price {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--primary-color);
      margin: 10px 0;
    }

    .token-badge {
      display: inline-block;
      font-size: 0.75rem;
      padding: 2px 8px;
      background-color: #FEF3C7;
      color: #D97706;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 案例展区 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }

    .case-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background-color: #E2E8F0;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .case-content {
      padding: 20px;
    }

    .case-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 评论卡片 (6条用户评论) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background-color: var(--bg-white);
      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;
    }

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

    .review-name {
      font-weight: 700;
      font-size: 0.95rem;
    }

    .review-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .review-comment {
      font-size: 0.9rem;
      color: var(--text-dark);
      line-height: 1.6;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background-color: var(--primary-light);
    }

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.925rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    /* 表单与联系方式 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: start;
    }

    .contact-info-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 32px;
      border-radius: var(--radius-lg);
    }

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

    .info-icon {
      width: 40px;
      height: 40px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }

    .qr-box {
      margin-top: 20px;
      padding: 16px;
      background-color: var(--bg-main);
      border-radius: var(--radius-md);
      text-align: center;
    }

    .qr-box img {
      max-width: 140px;
      height: auto;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .form-card {
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
      background-color: #FAFAFA;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary-color);
      background-color: #FFFFFF;
    }

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

    /* 加盟代理与被动收益 */
    .agency-card {
      background: linear-gradient(135deg, #FEF2F2 0%, #FFFBEB 100%);
      border: 1px solid var(--border-red);
      padding: 40px;
      border-radius: var(--radius-lg);
      text-align: center;
    }

    /* 行业资讯 / 最新文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
    }

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

    .article-link {
      color: var(--primary-color);
      font-weight: 600;
      word-break: break-all;
    }

    /* 底部 Footer - 显式指定高对比配色 */
    .footer {
      background-color: #0F172A;
      color: #E2E8F0;
      padding: 60px 0 30px;
      border-top: 3px solid var(--primary-color);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      color: #94A3B8;
      font-size: 0.9rem;
      line-height: 1.6;
    }

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      color: #94A3B8;
      font-size: 0.875rem;
    }

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

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

    .friendship-links a {
      color: #94A3B8;
      font-size: 0.85rem;
      background-color: #1E293B;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friendship-links a:hover {
      color: #FFFFFF;
      background-color: var(--primary-color);
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748B;
    }

    /* 浮动客服入口 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: linear-gradient(135deg, var(--primary-color), #B91C1C);
      color: #FFFFFF;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
      cursor: pointer;
      font-weight: 700;
      font-size: 0.85rem;
      text-align: center;
      line-height: 1.2;
    }

    .float-kefu:hover {
      transform: scale(1.08);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: #FFFFFF;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 1.75rem;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }