/* 弹窗 */
/* 触发按钮样式 */ 
    .open-btn { 
      
    } 
    .open-btn:hover { 
      background-color: #0D47A1; 
    } 
 
    /* 遮罩层：覆盖全屏，半透明背景 */ 
    .modal-overlay { 
      position: fixed; 
      top: 0; 
      left: 0; 
      width: 100%; 
      height: 100%; 
      background-color: rgba(0, 0, 0, 0.5); 
      display: none; /* 默认隐藏 */ 
      justify-content: center; 
      align-items: center; 
      z-index: 999; /* 确保在页面最上层 */ 
    } 
 
    /* 弹窗容器 */ 
    .modal { 
      background-color: #fff; 
      padding: 25px; 
      border-radius: 8px; 
      width: 78%; 
      max-width: 450px; /* 限制最大宽度，适配移动端 */ 
      position: relative; 
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2); 
    } 
 
    /* 关闭按钮 */ 
    .close-btn { 
      position: absolute; 
      top: 12px; 
      right: 15px; 
      font-size: 24px; 
      font-weight: bold; 
      color: #666; 
      background: none; 
      border: none; 
      cursor: pointer; 
      transition: color 0.3s; 
    } 
    .close-btn:hover { 
      color: #000; 
    } 
 
    /* 弹窗内容样式 */ 
    .modal-title { 
      margin-bottom: 15px; 
      color: #333; 
      font-size: 18px; 
    } 
    .modal-content { 
      color: #666; 
      line-height: 1.6; 
    } 
    .modal img{
      width: 100%;
    }