.menu-icon-size{width:20px}.tree-node{position:relative;padding-left:1rem}.tree-node:before{content:"";position:absolute;top:0;left:0;width:1rem;height:100%;border-left:2px solid #e5e7eb;z-index:-1}.tree-node .tree-branch{position:relative}.tree-node .tree-branch:before{content:"";position:absolute;top:50%;left:-1rem;width:1rem;border-top:2px solid #e5e7eb;z-index:-1}.tree-children{margin-left:1rem}