.zhuyemian{
    margin: 10px 22px 50px;
    width: 97%;
    height: 100vh;
    float: left;
    background-color: rgb(255, 255, 255);
    border-radius: 15px;
}

.zhuyemian div{
    display: inline-flex;
}
.menu{
    margin: 20px 0 20px 20px;
    background-color: rgb(255, 255, 255);
    border: 2px solid rgb(172, 171, 171);
    
    width: 30%;
    height: 95vh;
}

.tupian{
    margin: 20px 20px 20px 0;
    background-color: rgb(255, 255, 255);
    width: 65%;
    height: 95vh;
}

/*页面开头的表头*/
.nav2{
    float: left;
    width: 100%;
    height: 50px;
    background-color:  rgb(254, 255, 253);
    border-bottom: 2px solid rgb(172, 171, 171);
  }
  
  /*取消块级元素，使其在一行*/
  .nav2 ul li {
    display: inline-flex;
  }
  
  /*将几个元素连接起来*/
  .nav2 ul li a {
  
    padding: 12px 30px; 
    font-size: 20px;
    text-align: center;
    text-decoration: none;
    color: #666666;  
    font-family: Tahoma;
     
  }
  
  /*使其选中块就可以点击*/
  .nav2 li a {
    display: block;
  
  }
  
  /*鼠标停留*/
  .nav2 li a:hover {
    background-color: rgb(218, 224, 224);
  }
  
  .active {
    background-color: #3371f7;
  }