#wb_tree span{border:1px solid gray;cursor:pointer;display:inline-block;height:10px;width:10px;font-size:13px;line-height:11px;text-align:center;vertical-align:middle;margin-right:5px;border-radius:2px}#wb_tree ul{list-style:none}#wb_tree ul li{margin-left:10px}#wb_tree ul ul{margin-left:7px;border-left:1px dashed gray}#wb_tree ul ul li{padding-left:10px;position:relative}#wb_tree ul ul li:before{content:"";position:absolute;border-bottom:1px dashed gray;left:-10px;top:15px;width:15px;height:1px}