.layui-navchongtu .layui-nav-more {
    content: '';
    width: 0;
    height: 0;
    border-style: solid dashed dashed;
    border-color: #fff transparent transparent;
    overflow: hidden;
    cursor: pointer;
    transition: all .2s;
    -webkit-transition: all .2s;
    position: absolute;
    top: 50%;
    right: 3px;
    margin-top: -3px;
    border-width: 6px;
    /*border-top-color: #f90;*/
}

.layui-navchongtu .layui-nav-item a {
    display: block;
    padding: 0 20px 0 0;
    color: #fff;
    color: rgba(255,255,255,.7);
    transition: all .3s;
    -webkit-transition: all .3s;
}