.editor { width : 100%; height : 100%; overflow: hidden; } .editorBd { height : 100%; display: flex; background: #fafafa; } .editorSidebar, .editorContent { min-width: 500px; height : 100%; } .editorSidebar { background: #fafafa; overflow-y: auto; } .mind { width : 100%; height : 800px; }