#yjdh{    position: relative;}
.ejdh {
    position: absolute;
    left: 0;
    width: 100%;
    top: 100%;
    display: none;
    background-color: #187ee4;
    z-index: 9999;}
.ejdh a{background: #147ae0 !important;}
.ejdh a:hover{background: #ffcc00 !important;}
#yjdh:hover .ejdh{ display: block;}