.yj-li {position:relative;
    float: left;
    width: 11%;
    text-align: center;
    line-height: 30px;}
.yj-li a {
    color: #fff;}
.yj-li:hover{    background-color: #017acb;}
.ej-ul {
    position: absolute;
    left: 0;
    width: 100%;
    top: 100%;
    z-index: 9999;
    background-color: #008be8;
    display: none;}
.yj-li:hover .ej-ul{   display: block;}
.ej-ul li:hover{    background-color: #017acb;}