:root {
      --primary: #d81b60;
      --primary-hover: #c2185b;
      --primary-light: #fce4ec;
      --primary-dark: #880e4f;
      --accent: #e91e63;
      --bg-page: #fff5f8;
      --bg-card: #ffffff;
      --bg-subtle: #fdf2f6;
      --text-main: #2b1820;
      --text-muted: #664d56;
      --border-color: #f8bbd0;
      --shadow-sm: 0 2px 8px rgba(216, 27, 96, 0.06);
      --shadow-md: 0 8px 24px rgba(216, 27, 96, 0.1);
      --shadow-lg: 0 16px 32px rgba(216, 27, 96, 0.15);
      --radius: 12px;
      --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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      width: 100%;
    }

    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.3s ease;
    }
    a:hover {
      color: var(--primary-dark);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      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;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
    }
    .nav-links li {
      position: relative;
    }
    .nav-links a {
      display: block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      white-space: nowrap;
      border-radius: 6px;
    }
    .nav-links a:hover {
      color: var(--primary);
      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: 14px;
      font-weight: 600;
      border-radius: 30px;
      cursor: pointer;
      border: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(216, 27, 96, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(216, 27, 96, 0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary) !important;
    }
    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    /* 移动端菜单按钮 */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-dark);
      cursor: pointer;
    }

    /* 英雄首屏区（严禁包含图片） */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #ffe4ec 0%, #fff5f8 70%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-badge {
      display: inline-block;
      padding: 6px 18px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 20px;
      border: 1px solid var(--border-color);
    }
    .hero-title {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }
    .hero-cta {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .hero-cta .btn {
      padding: 14px 36px;
      font-size: 16px;
    }

    /* 数据指标卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }
    .stat-card {
      background: var(--bg-card);
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 通用章节样式 */
    .section-padding {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }
    .section-tag {
      color: var(--primary);
      font-size: 14px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 网格与卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 20px;
      margin-bottom: 18px;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模特/图片媒体样式 */
    .ai-page-image {
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .media-card-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 16px;
    }

    /* 对比表格 */
    .table-wrapper {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .eval-table th {
      background: var(--bg-subtle);
      color: var(--primary-dark);
      font-weight: 700;
    }
    .eval-table tr:last-child td {
      border-bottom: none;
    }
    .eval-score-box {
      background: linear-gradient(135deg, #fff0f5 0%, #ffe4ec 100%);
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      text-align: center;
      margin-bottom: 30px;
    }
    .star-rating {
      color: #ff9800;
      font-size: 24px;
      margin-bottom: 8px;
    }
    .score-num {
      font-size: 36px;
      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-item {
      background: var(--bg-card);
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-num {
      position: absolute;
      top: -15px;
      right: 20px;
      width: 34px;
      height: 34px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 20px;
    }
    .tag-item {
      padding: 6px 14px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 13px;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }
    .tag-item:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    /* FAQ折叠面板 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-header {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--primary-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: var(--bg-card);
    }
    .faq-header::after {
      content: "+";
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-header::after {
      content: "−";
    }
    .faq-body {
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      display: none;
      line-height: 1.6;
    }
    .faq-item.active .faq-body {
      display: block;
    }

    /* 表单组件 */
    .form-box {
      background: var(--bg-card);
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      max-width: 700px;
      margin: 0 auto;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      background: var(--bg-subtle);
      color: var(--text-main);
      outline: none;
      transition: border 0.3s ease;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      background: #fff;
    }

    /* 底部区域 */
    .site-footer {
      background: #1f0a12;
      color: #f8bbd0;
      padding: 60px 0 30px;
      border-top: 3px solid var(--primary);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #f8bbd0;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-qr {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .footer-qr img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      border: 2px solid var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(248, 187, 208, 0.15);
      padding-top: 24px;
      text-align: center;
      color: #c2185b;
      font-size: 13px;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 12px;
    }
    .friend-links a {
      color: #f8bbd0;
    }
    .friend-links a:hover {
      color: #ffffff;
    }

    /* 浮动客服入口 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .kefu-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.2);
      cursor: pointer;
      font-size: 12px;
      text-align: center;
      font-weight: bold;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .grid-4, .process-steps, .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 26px;
      }
      .grid-3, .grid-4, .grid-2, .process-steps, .stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }