/* */
.list-left-tt{position:relative;}
.list-left-tt span{content:"";position:absolute;right:30px;top:30px;width:16px;height:16px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform: rotate(-45deg);    transition: all 0.5s;display:none;}
.list-left-tt span.active{transform: rotate(135deg);top:40px;}

@media (max-width:991px){
.list-left-tt span{display:block;}
.list-left-nav{display:none;}
}
@media (max-width:576px){
.list-left-tt span{top:12px;}
.list-left-tt span.active{top:21px;}
}