/*二级导航*/
        .cl-nav-2{
            position: relative;
            width: 100%;
            list-style: none;
            background-color: rgba(240, 240, 240,1);
            padding-left:0;
        }
        .cl-nav-2>li{
            text-indent: 2rem;
            line-height: 40px;
            position: relative;
        }
        .cl-nav-2>li:last-child{
            border-bottom:none
        }
       .cl-nav-2>li:hover{
            background-color: rgba(100,144,230,1);
            color:rgba(255, 255, 255,1);
        }
       .cl-nav-2>li:hover>a{
            color:rgba(255, 255, 255,1);
        }
        .cl-nav-2>li>span{
            position: absolute;
            top: 10px;
            right: 10px;
            display: inline-block;
            width: 20px;
            height: 20px;
            
            background: url(../img/arrow.png);
            background-size:20px 20px;
            
        }

        .cl-nav-2>li>.content{
            display: none;
            background-color: rgba(248,248,248,1);
            padding-left: 0;
        }
        .cl-nav-2>li>.content>li{
            list-style: none;
            border-bottom: 1px solid white;
            text-indent: 2rem;
            padding-left: 1rem;
        }
        .cl-nav-2>li>.content>li:last-child{
            border-bottom: none;
        }
        .cl-nav-2>li.content>li:hover{
            background-color: rgba(230,230,230,1);
        }
        .cl-nav-2>.current>span{
            transform: rotate(90deg);
        }
.cl-nav-2 .current ul{
      display:block;
}