:root {
      --primary: #E91E63;
      --primary-dark: #C2185B;
      --primary-light: #F8BBD0;
      --primary-accent: #FF2A6D;
      --pink-soft: #FFF0F5;
      --text-dark: #1F2937;
      --text-gray: #4B5563;
      --text-muted: #9CA3AF;
      --bg-white: #FFFFFF;
      --bg-light: #FFF9FA;
      --border-color: #FCE4EC;
      --radius: 12px;
      --shadow-sm: 0 2px 8px rgba(233, 30, 99, 0.06);
      --shadow-md: 0 8px 24px rgba(233, 30, 99, 0.1);
      --shadow-lg: 0 16px 36px rgba(233, 30, 99, 0.15);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      overflow-x: hidden;
    }

    /* 容器控制 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .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-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

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

    .nav-wrapper {
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li {
      display: inline-block;
    }

    .nav-links a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-dark);
      text-decoration: none;
      transition: var(--transition);
      border-radius: 6px;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 50px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: none;
      outline: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-accent) 0%, var(--primary) 100%);
      color: var(--bg-white);
      box-shadow: 0 4px 14px rgba(233, 30, 99, 0.3);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(233, 30, 99, 0.4);
    }

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

    .btn-outline:hover {
      background: var(--pink-soft);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* 首屏 Hero Section - 严格限制禁止出现任何图片 */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 20%, #FFF0F5 0%, #FFF9FA 60%, #FFFFFF 100%);
      text-align: center;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-section::before {
      content: '';
      position: absolute;
      top: -100px;
      left: 50%;
      transform: translateX(-50%);
      width: 800px;
      height: 400px;
      background: radial-gradient(circle, rgba(255, 42, 109, 0.08) 0%, rgba(233, 30, 99, 0) 70%);
      pointer-events: none;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #FFE4EC;
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 20px;
      border: 1px solid rgba(233, 30, 99, 0.2);
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-subtitle {
      font-size: 19px;
      color: var(--text-gray);
      max-width: 800px;
      margin: 0 auto 36px;
      font-weight: 400;
    }

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

    .btn-hero {
      padding: 14px 34px;
      font-size: 16px;
    }

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

    .stat-card {
      background: var(--bg-white);
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

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

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-gray);
    }

    /* 公用 Section 样式 */
    .section {
      padding: 80px 0;
      position: relative;
    }

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

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

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-gray);
    }

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

    .card {
      background: var(--bg-white);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-light);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--pink-soft);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .card-text {
      font-size: 14px;
      color: var(--text-gray);
      line-height: 1.6;
    }

    /* 标签云与特性列表 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 15px;
    }

    .tag-item {
      padding: 6px 14px;
      background: var(--pink-soft);
      color: var(--primary-dark);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 500;
      border: 1px solid var(--border-color);
    }

    /* 表格 */
    .table-wrapper {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-white);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .custom-table th {
      background: var(--pink-soft);
      color: var(--primary-dark);
      font-weight: 700;
    }

    .custom-table tbody tr:hover {
      background: rgba(255, 240, 245, 0.4);
    }

    .badge-recommend {
      background: var(--primary);
      color: white;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: bold;
    }

    /* 评测卡片 */
    .rating-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #FFF0F5 0%, #FFE4EC 100%);
      padding: 30px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      margin-bottom: 30px;
    }

    .rating-score {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .rating-stars {
      color: #FFB800;
      font-size: 24px;
      margin-top: 4px;
    }

    /* 折叠面板 FAQ */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.3s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: var(--bg-light);
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-gray);
      line-height: 1.7;
    }

    /* 图片与展示 */
    .media-card {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: var(--bg-white);
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
    }

    .media-card-body {
      padding: 16px;
    }

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

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      outline: none;
      transition: var(--transition);
      background: var(--bg-white);
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.1);
    }

    .qr-card {
      text-align: center;
      background: var(--pink-soft);
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }

    .qr-card img {
      max-width: 180px;
      border-radius: 8px;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
    }

    /* 页脚 */
    .footer {
      background: #1A1A24;
      color: #E5E7EB;
      padding: 60px 0 30px;
      font-size: 14px;
    }

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

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

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

    .footer-links a {
      color: #9CA3AF;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--primary-light);
    }

    .friend-links-box {
      border-top: 1px solid #2D2D3A;
      padding-top: 24px;
      margin-top: 24px;
    }

    .friend-links-box h5 {
      color: #9CA3AF;
      font-size: 13px;
      margin-bottom: 12px;
    }

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

    .friend-links-list a {
      color: #D1D5DB;
      text-decoration: none;
      font-size: 13px;
      transition: var(--transition);
    }

    .friend-links-list a:hover {
      color: var(--primary-light);
    }

    .copyright {
      text-align: center;
      border-top: 1px solid #2D2D3A;
      padding-top: 24px;
      color: #6B7280;
      font-size: 13px;
    }

    /* 浮动客服 */
    .floating-cta {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary);
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      text-decoration: none;
      font-size: 20px;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary-dark);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .header-container { height: 64px; }
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-title { font-size: 30px; }
      .hero-subtitle { font-size: 16px; }
    }

    @media (max-width: 640px) {
      .grid-2, .grid-3, .grid-4, .stats-grid { grid-template-columns: 1fr; }
      .rating-header { flex-direction: column; text-align: center; gap: 16px; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-section { padding: 60px 0 40px; }
    }