:root {
      --primary-color: #0084FF;
      --primary-gradient: linear-gradient(90deg, #00A3FF 0%, #0066FF 100%);
      --primary-hover-gradient: linear-gradient(90deg, #52C0FF 0%, #5297FF 100%);
      --secondary-color: #F6F8FF;
      --text-color: #151515;
      --light-text: #686F7E;
      --border-radius: 10px;
      --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      color: var(--text-color);
      background-color: var(--secondary-color);
    }
    
    .container {
      width: 100%;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }
    
    .main-content {
      flex: 1;
      background-color: var(--secondary-color);
      background-image: url("https://static.yximgs.com/udata/pkg/559f6c913534458e87ab238c222550c8.png");
      background-size: 100% auto;
      background-position: top center;
      background-repeat: no-repeat;
      padding: 0 20px 60px;
    }
    
    @media (min-width: 1200px) {
      .main-content {
        padding: 0 360px 60px;
      }
    }
    
    header {
      padding-top: 20px;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    /* 始终保留滚动条空间，避免弹窗打开/关闭时页面抖动 */
      html {
        scrollbar-gutter: stable;
      }

      body.modal-open {
        overflow: hidden;
      }

      /* 优化弹窗样式 */
      .modal-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        display: none;
        justify-content: center;
        align-items: center;
        z-index: 999;
        overflow-y: auto;
      }

      .modal-content {
        background: white;
        padding: 16px;
        border-radius: 10px;
        width: auto;
        min-width: 240px;
        max-width: 90%;
        position: relative;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        height: auto;
        /* 新增滚动控制 */
        max-height: 90vh;
        overflow-y: auto;
        animation: modalSlideIn 0.3s ease-out;
      }

      /* 入场动画 */
      @keyframes modalSlideIn {
        from {
          transform: translateY(20px);
          opacity: 0;
        }
        to {
          transform: translateY(0);
          opacity: 1;
        }
      }

      .modal-close {
        position: absolute;
        top: 4px;
        right: 8px;
        cursor: pointer;
        font-size: 20px;
        color: #666;
        line-height: 1;
        background: none;
        border: none;
        padding: 0;
      }

      .modal-title {
        margin: 0 0 12px 0;
        font-size: 15px;
        color: #333;
        text-align: center;
        padding: 0 20px;
      }

      .modal-buttons {
        display: flex;
        flex-direction: column;
        gap: 8px;
        position: sticky;
        bottom: -16px; /* 粘性定位在底部 */
        background: white;
        padding-top: 12px;
        margin-top: 12px;
      }

      .modal-button {
        padding: 8px 16px;
        background: #ff6b00;
        color: white;
        border: none;
        border-radius: 4px;
        cursor: pointer;
        text-align: center;
        text-decoration: none;
        font-size: 13px;
        transition: background 0.2s;
        white-space: nowrap;
      }

      /* 滚动条美化 */
      .modal-content::-webkit-scrollbar {
        width: 6px;
      }

      .modal-content::-webkit-scrollbar-track {
        background: #f1f1f1;
        border-radius: 3px;
      }

      .modal-content::-webkit-scrollbar-thumb {
        background: #888;
        border-radius: 3px;
      }

      /* 手机端优化 */
      @media (max-width: 480px) {
        .modal-content {
          padding: 12px;
          min-width: 200px;
          max-height: 85vh; /* 手机端更大可视区域 */
        }

        .modal-buttons {
          bottom: -12px;
          padding-top: 8px;
        }

        .modal-button {
          padding: 10px;
          font-size: 12px;
        }

        .modal-title {
          font-size: 14px;
          margin-bottom: 10px;
        }
      }
      /* 新增iOS专属样式 */
      .modal-instructions {
        margin: 15px 0;
        padding: 0 10px;
      }

      .tip-text {
        color: #666;
        font-size: 13px;
        margin-bottom: 12px;
      }

      .step-list {
        padding-left: 20px;
        margin: 12px 0;
        color: #444;
        font-size: 13px;
        line-height: 1.6;
      }

      .step-list li {
        margin-bottom: 8px;
      }

      .notice {
        background: #f8f9fa;
        border-radius: 6px;
        padding: 12px;
        margin-top: 15px;
      }

      .notice p {
        color: #ff3b30;
        font-size: 12px;
        margin: 6px 0;
      }

      .ios-button {
        font-weight: 500;
        letter-spacing: 0.5px;
        box-shadow: 0 2px 6px rgba(52, 199, 89, 0.2);
      }

      @media (max-width: 480px) {
        .step-list {
          font-size: 12px;
        }

        .notice p {
          font-size: 11px;
        }
      }
    
    .logo-text {
      display: flex;
      align-items: center;
      font-size: 28px;
      font-weight: bold;
      color: var(--primary-color);
      margin-bottom: 58px;
      gap: 20px;
    }
    
    .logo-icon {
      width: 100px;
      height: 100px;
      border-radius: 50%;
    }
    
    .hero-section {
      position: relative;
      z-index: 1;
    }
    
    .hero-title {
      font-size: 44px;
      font-weight: 500;
      line-height: 52px;
      color: var(--text-color);
      margin-bottom: 7px;
    }
    
    .hero-subtitle {
      font-size: 22px;
      letter-spacing: 7px;
      color: rgba(21, 21, 21, 0.6);
      line-height: 24px;
      margin-bottom: 20px;
    }
    
    .save-button {
      display: flex;
      align-items: center;
      justify-content: center;
      height: 64px;
      min-width: 290px;
      padding: 0 40px;
      background: var(--primary-gradient);
      color: white;
      font-size: 24px;
      border-radius: 12px;
      cursor: pointer;
      transition: background 0.3s ease;
      border: none;
      margin-bottom: 78px;
    }
    
    .save-button:hover {
      background: var(--primary-hover-gradient);
    }
    
    .section-title {
      font-size: 20px;
      font-weight: 500;
      line-height: 28px;
      color: var(--text-color);
      margin-bottom: 24px;
      padding-bottom: 8px;
      background-image: url("https://static.yximgs.com/udata/pkg/f5c2f2432bdb48bc9ebcd15721e052be.png");
      background-size: 60px 12px;
      background-position: left bottom;
      background-repeat: no-repeat;
    }
    
    .download-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
      margin-bottom: 60px;
    }
    
    .download-card {
      display: flex;
      align-items: center;
      background-color: white;
      border-radius: var(--border-radius);
      padding: 20px 32px;
      box-shadow: var(--box-shadow);
    }
    
    .app-icon {
      width: 56px;
      height: 56px;
      flex-shrink: 0;
    }
    
    .app-info {
      flex: 1;
      margin-left: 16px;
    }
    
    .app-name {
      font-weight: 500;
      font-size: 16px;
      margin-bottom: 8px;
    }
    
    .app-description {
      font-size: 14px;
      color: var(--light-text);
    }
    
    .download-button {
      background-color: rgba(50, 156, 255, 0.16);
      color: var(--primary-color);
      font-size: 16px;
      font-weight: 500;
      padding: 0 20px;
      height: 40px;
      line-height: 40px;
      border-radius: 10px;
      cursor: pointer;
      transition: all 0.3s ease;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    
    .download-button:hover {
      background-color: var(--primary-color);
      color: white;
    }
    
    .alert {
      background-color: white;
      color: var(--primary-color);
      padding: 15px 20px;
      border-radius: var(--border-radius);
      margin-bottom: 30px;
      box-shadow: var(--box-shadow);
      line-height: 1.6;
      border: 1px solid rgba(0, 132, 255, 0.2);
    }
    
    .highlight {
      background-color: rgba(0, 132, 255, 0.1);
      color: var(--primary-color);
      padding: 0 4px;
      font-weight: bold;
    }
    
    .installation-guide {
      background-color: white;
      border-radius: var(--border-radius);
      padding: 25px;
      margin-bottom: 40px;
      box-shadow: var(--box-shadow);
    }
    
    .guide-tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 20px;
    }
    
    .guide-tab {
      padding: 8px 15px;
      background-color: rgba(50, 156, 255, 0.16);
      border-radius: var(--border-radius);
      cursor: pointer;
      transition: all 0.3s ease;
      color: var(--primary-color);
    }
    
    .guide-tab.active {
      background-color: var(--primary-color);
      color: white;
    }
    
    .guide-content {
      display: none;
    }
    
    .guide-content.active {
      display: block;
    }
    
    footer {
      background-color: white;
      padding: 20px;
      text-align: center;
      color: rgba(0, 0, 0, 0.4);
      font-size: 12px;
      line-height: 1.6;
    }
    
    @media (max-width: 768px) {
      header {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        margin-top: 20px;
      }
      
      .logo-text {
        font-size: 24px;
        text-align: center;
        margin-bottom: 24px;
      }
      
      .hero-title {
        font-size: 22px;
        line-height: 26px;
        text-align: center;
        width: 100%;
      }
      
      .hero-subtitle {
        font-size: 12px;
        letter-spacing: 3px;
        text-align: center;
        width: 100%;
      }
      
      .hero-section {
        display: flex;
        flex-direction: column;
        align-items: center;
      }
      
      .save-button {
        height: 50px;
        font-size: 20px;
        min-width: 234px;
        padding: 0 20px;
        margin-bottom: 40px;
      }
      
      .download-grid {
        grid-template-columns: 1fr;
      }
      
      .download-card {
        padding: 16px;
      }
    }
    
    .modal {
      display: none;
      position: fixed;
      z-index: 1000;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      overflow: auto;
      background-color: rgba(0, 0, 0, 0.8);
    }
    
    .modal > .modal-content {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 100%;
      width: 100%;
      padding: 20px;
      box-sizing: border-box;
      overflow-y: auto;
    }
    
    .modal img.preview-image {
      max-height: 60vh;
      max-width: 90%;
      border-radius: 20px;
      pointer-events: auto;
      user-select: auto;
      object-fit: contain;
    }
    
    .close-modal {
      position: absolute;
      top: 20px;
      right: 20px;
      color: white;
      font-size: 30px;
      font-weight: bold;
      cursor: pointer;
      z-index: 1001;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      background-color: rgba(0, 0, 0, 0.5);
      border-radius: 50%;
    }
    
    .custom-icon {
      width: 50px;
      height: 50px;
      background-color: #999;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 24px;
      font-weight: bold;
      padding: 10px;
      box-sizing: border-box;
    }

    @media (max-width: 768px) {
      .custom-icon {
        width: 38px;
        height: 38px;
        font-size: 18px;
        padding: 8px;
      }
    }

    .custom-icon svg {
      width: 100%;
      height: 100%;
      fill: white;
    }
    
    
    
    
    
    
    
    
    .modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.5);
}



.close-modal {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
}

.close-modal:hover,
.close-modal:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}

.download-option {
  margin: 10px;
  padding: 10px 20px;
  background-color: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
}

.download-option:hover {
  background-color: #45a049;
}