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