.div_class{background-color:#fff}.check_div_class{background-color:#9aff9a}.tree{-moz-user-select:none;-ms-user-select:none;-webkit-user-select:none;user-select:none}.tree li{list-style-type:none;margin:0;padding:10px 5px 0 5px;position:relative}.tree li:after,.tree li:before{content:"";left:-20px;position:absolute;right:auto}.tree li:before{border-left:1px solid #999;bottom:50px;height:100%;top:0;width:2px}.tree li:after{border-top:1px solid #999;height:20px;top:25px;width:25px}.tree li span{-moz-border-radius:5px;-webkit-border-radius:5px;border:1px solid #999;border-radius:5px;display:inline-block;padding:3px 8px;text-decoration:none}.tree li ul:last-child li:before{height:65%}.tree>ul>li:after,.tree>ul>li:before{border:0}