.tree{min-height:20px;margin-bottom:20px}.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:1px}.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.parent_li>span{cursor:pointer}.tree>ul>li::after,.tree>ul>li::before{border:0}.tree li:last-child::before{height:30px}.tree li.parent_li>span:hover,.tree li.parent_li>span:hover+ul li span{background:#eee;border:1px solid #94a0b4;color:#000}