/***********/
.wap-sj {
    display:none;}
.sj-jt {
    position: absolute;
    width: .2rem;
    height: .2rem;
    background: url(./images/m-nav_down.png) no-repeat;
    background-size: .14rem .14rem;
    background-position: center center;
    right: 0;
    top: .15rem;
    cursor: pointer;
    display: block;
    color: #fff;
    transition: all 0.3s;
    z-index: 9999;}
.sj-jt.on {
transform: rotateZ(90deg);}