.navigation-bar {
    align-items: center;
    height: 50px;
    padding: 10px;
    justify-content: space-between; /* 使用 space-between 实现按钮左右对齐 */
    border-bottom:1px solid #807b7b ;
    
  
    button.back-button {
      width: 30px;
      height: 30px;
      padding: 4px 0 4px 4px;
      border: none;
      background-color: transparent;
      cursor: pointer;
  
      .back-icon {
        width: auto;
        height: 20px;
        transform-origin: center;
        transition: transform 0.3s ease, border-color 0.3s ease;
      }
    }
  
    button.share-button {
      width: 30px;
      float:right;
      height: 30px;
      padding: 4px 0 4px 0;
      border: none;
      background-color: transparent;
      cursor: pointer;
  
      .share-icon {
        width: auto;
        height: 20px;
        transform-origin: center;
      }
    }
  }

  .footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 10px;
    background-color: #f1f1f1;
  }
  

  .chatlist {
    flex: 1;
    background-color: #f1f1f1;
  }
  
  .chatbox {
    flex: 3;
    background-color: #fff;
    display: flex;
    flex-direction: column;
  }
  
  .msglist {
    flex: 1;
    padding: 10px;
    overflow-y: auto;
  }
  
  .msgbox {
    background-color: #f1f1f1;
    padding: 10px;
    margin-bottom: 10px;
  }

  .page {
    display: flex;
    height: 100vh;
  }
  
  .leftnav {
    width: 250px;
    background-color: #f1f1f1;
    display: flex;
    flex-direction: column;
  }
  
  .avatar {
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .tablist {
    display: flex;
    flex-direction: column;
    margin-top: 20px;
  }
  
  .tab-button {
    padding: 10px;
    background-color: #ccc;
    margin-bottom: 10px;
  }
  