:root {
      --primary: #3B82F6;
      --primary-light: #EFF6FF;
      --secondary: #64748B;
      --dark: #1E293B;
      --light: #F8FAFC;
      --success: #10B981;
      --warning: #F59E0B;
      --danger: #EF4444;
    }
    
    body {
      font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      color: var(--dark);
      background-color: #FFFFFF;
      line-height: 1.6;
    }
    
    /* 导航栏样式 */
    .navbar {
      background-color: white;
      padding: 15px 0;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .navbar-brand img {
      height: 40px;
    }
    
    .nav-link {
      color: var(--primary);
      font-weight: 500;
      padding: 8px 20px;
      font-size: 16px;
    }
    
    .nav-link:hover {
      color: #1D4ED8;
    }
    
    /* 页面标题区域 */
    .page-header {
      background: linear-gradient(135deg, var(--primary) 0%, #1D4ED8 100%);
      color: white;
      padding: 60px 0;
      margin-bottom: 0;
    }
    
    .page-title {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    
    .page-subtitle {
      font-size: 18px;
      opacity: 0.9;
    }
    
    /* 搜索区域 */
    .search-section {
      background-color: var(--light);
      padding: 40px 0;
      border-bottom: 1px solid #E2E8F0;
    }
    
    .search-box {
      max-width: 600px;
      margin: 0 auto;
      position: relative;
    }
    
    .search-input {
      padding: 15px 50px 15px 20px;
      border: 2px solid #E2E8F0;
      border-radius: 50px;
      font-size: 16px;
      transition: all 0.3s ease;
    }
    
    .search-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }
    
    .search-icon {
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--secondary);
      font-size: 18px;
    }
    
    /* 内容区域 */
    .help-content {
      padding: 60px 0;
      min-height: 60vh;
    }
    
    /* 产品选择卡片 */
    .product-selector {
      margin-bottom: 40px;
    }
    
    .product-card {
      background: white;
      border: 2px solid #E2E8F0;
      border-radius: 12px;
      padding: 30px;
      text-align: center;
      cursor: pointer;
      transition: all 0.3s ease;
      height: 100%;
    }
    
    .product-card:hover {
      border-color: var(--primary);
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(59, 130, 246, 0.1);
    }
    
    .product-card.active {
      border-color: var(--primary);
      background: var(--primary-light);
    }
    
    .product-icon {
      width: 60px;
      height: 60px;
      background: var(--primary-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      font-size: 24px;
      color: var(--primary);
    }
    
    .product-card.active .product-icon {
      background: var(--primary);
      color: white;
    }
    
    .product-title {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }
    
    .product-description {
      color: var(--secondary);
      font-size: 14px;
    }
    
    /* FAQ区域 */
    .faq-section {
      margin-top: 40px;
    }
    
    .faq-category {
      margin-bottom: 30px;
    }
    
    .category-title {
      font-size: 24px;
      font-weight: 600;
      color: var(--dark);
      margin-bottom: 20px;
      padding-bottom: 10px;
      border-bottom: 2px solid var(--primary);
    }
    
    .faq-item {
      background: white;
      border: 1px solid #E2E8F0;
      border-radius: 8px;
      margin-bottom: 10px;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    
    .faq-item:hover {
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }
    
    .faq-question {
      padding: 20px;
      cursor: pointer;
      border: none;
      background: none;
      width: 100%;
      text-align: left;
      font-size: 16px;
      font-weight: 500;
      color: var(--dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    .faq-question:hover {
      background: var(--light);
    }
    
    .faq-toggle {
      font-size: 14px;
      color: var(--primary);
      transition: transform 0.3s ease;
    }
    
    .faq-toggle.active {
      transform: rotate(180deg);
    }
    
    .faq-answer {
      padding: 0 20px 20px;
      color: var(--secondary);
      line-height: 1.6;
      display: none;
    }
    
    .faq-answer h6 {
      color: var(--dark);
      margin-top: 15px;
      margin-bottom: 10px;
      font-size: 15px;
    }
    
    .faq-answer ul {
      margin-bottom: 15px;
    }
    
    .faq-answer ul li {
      margin-bottom: 5px;
    }
    
    .faq-answer img {
      box-shadow: 0 4px 8px rgba(0,0,0,0.1);
      transition: transform 0.3s ease;
    }
    
    .faq-answer img:hover {
      transform: scale(1.02);
      cursor: pointer;
    }
    
    .faq-answer.show {
      display: block;
      animation: fadeIn 0.3s ease;
    }
    
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(-10px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    /* 无结果提示 */
    .no-results {
      text-align: center;
      padding: 60px 0;
      color: var(--secondary);
    }
    
    .no-results i {
      font-size: 48px;
      margin-bottom: 20px;
      opacity: 0.5;
    }
    
    /* 快速导航 */
    .quick-nav {
      background: var(--light);
      padding: 30px 0;
      margin-top: 60px;
    }
    
    .quick-nav-item {
      text-align: center;
      padding: 20px;
      background: white;
      border-radius: 8px;
      text-decoration: none;
      color: var(--dark);
      transition: all 0.3s ease;
      display: block;
      height: 100%;
    }
    
    .quick-nav-item:hover {
      color: var(--primary);
      transform: translateY(-3px);
      box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    }
    
    .quick-nav-icon {
      font-size: 24px;
      color: var(--primary);
      margin-bottom: 10px;
    }
    
    /* 页脚 */
    footer {
      background-color: var(--primary);
      color: white;
      padding: 40px 0 20px;
      margin-top: 80px;
    }
    
    footer a {
      color: rgba(255,255,255,0.8);
      text-decoration: none;
    }
    
    footer a:hover {
      color: white;
    }
    
    /* 响应式设计 */
    @media (max-width: 768px) {
      .page-title {
        font-size: 28px;
      }
      
      .page-subtitle {
        font-size: 16px;
      }
      
      .help-content {
        padding: 40px 0;
      }
      
      .product-card {
        padding: 20px;
        margin-bottom: 20px;
      }
      
      .faq-question {
        padding: 15px;
        font-size: 15px;
      }
      
      .faq-answer {
        padding: 0 15px 15px;
      }
    }
    
    /* 搜索高亮 */
    .highlight {
      background-color: #FEF3C7;
      padding: 2px 4px;
      border-radius: 3px;
    }



/* Extracted inline style attributes */
.help-inline-style-1 { max-width: 100%; border: 1px solid #e2e8f0; border-radius: 8px; }
.help-inline-style-2 { display: none; }
.help-inline-style-3 { border-top: 1px solid rgba(255,255,255,0.1); }