.ant-tree.ant-select-tree.ant-tree-show-line nz-tree-node[builtin]:not(:last-child) > li::before { position: absolute; left: 12px; width: 1px; height: calc(100% - 16px); margin: 26px 0; border-left: 1px solid #d9d9d9; content: ' '; } .ant-select-dropdown.ant-select-tree-dropdown { position: relative; top: 100%; left: 0; width: 100%; margin-top: 4px; margin-bottom: 4px; overflow: auto; .cdk-virtual-scroll-content-wrapper { overflow: auto; } }