.floatR{float:right!important}.mb10{margin-bottom:10px}.tree{float:left;width:280px;overflow-y:auto;overflow-x:hidden;max-height:720px}.right_content{float:left;width:calc(100% - 280px)}.btnNone{display:none}.hhhaha:hover .btnNone{display:inline-block}.hhhaha:hover{color:#1890ff}.ivu-tree ul li{list-style:none;padding:0;white-space:nowrap;outline:none}