.left_nav_item{display:flex;align-items:center}.left_nav_item>a{position:relative;text-align:left;font-size:16px;line-height:20px;color:#666;padding-left:15px;display:inline-block;min-width:69px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.left_nav_item>a::before{position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;content:"";background-color:transparent;height:0;display:inline-block;-webkit-transition:all .3s ease-in-out;transition:all .3s ease-in-out}.left_nav_item:hover>a::before{height:20px;background-color:#206bd1}.left_nav_item:hover>a{color:#206bd1;transition:all .3s ease-in-out}.left_nav_item .left_nav_active{color:#206bd1}.left_nav_item .left_nav_active::before{position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;content:"";background-color:#206bd1;height:21px;display:inline-block}