.hc-links-sample-modal-box { position: relative; height: 100%; display: flex; .hc-links-sample-tree-box, .hc-links-sample-table-box { position: relative; height: 100%; } .hc-links-sample-tree-box { margin-right: 24px; border: 1px solid #EEEEEE; } .hc-links-sample-table-box { flex: 1; } }