li.act{
    background-color: #06368b;}
li.act::after{ 
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0.2rem;
    width: 0.2rem;
    background: url(images/yxdw-left.png) no-repeat !important;
    background-position: right center;}
li.act a {
    color: #fff !important;}