header{
        display: flex;
        width: 800px;
        height: 50px;
       
        position: relative;
    right: -14%;}
    header>ul{
        display: flex;
       list-style-type: none;}
    a{
        text-align: center;
        font-size: 16px;
        text-decoration: none;
        color: #000000;}
    header>ul>li{
        /* background-color: #eeeeee; */
        height: 30px;
        width: 80px;}
    
     header>ul>li>a{
     font-size: 20px;
     font-family: "微软雅黑";
     font-weight: 800
     ;}
    header>ul>li a:hover{
        color:#c6d0d9;}
    header>ul>li:hover .ejdh{
        display: flex;}
     header>ul>li a:hover .ejdh{
        display: flex;}
    .ejdh:hover{
    display: flex;}
    .ejdh{
        list-style-type: none;
        display: none;
       
        flex-direction: column;
        align-content: flex-start;}
    .ejdh:hover{
        display: flex;}
    .ejdh li{
        width: 80px;
        position: relative;
        line-height: 23px;
       
        background-color: #ffffff;
        padding: 5px;
        border-bottom: 1px solid #ddd;
        z-index:10;
        display: flex;
    justify-content: center;
    align-items: center;}
    .ejdh li:hover{
        background-color: #c6d0d9;}