.custom-tree .ant-menu-item-group-title{position:relative}.custom-tree .ant-menu-item-group-title:hover .btn,.custom-tree .ant-menu-item:hover .btn{display:block}.custom-tree .btn{display:none;position:absolute;top:0;right:10px;width:20px;height:40px;line-height:40px;z-index:1050}.custom-tree .btn:hover{-webkit-transform:scale(1.2);transform:scale(1.2);-webkit-transition:all .5s;transition:all .5s}.ant-checkbox-wrapper+.ant-checkbox-wrapper{margin-left:0;margin-right:8px;margin-bottom:4px}