.a-tree .header_fixed[data-v-4f499212]{border-bottom:1px solid #e4e7ed;justify-content:space-between;align-items:center;padding:10px;display:flex}.a-tree .background[data-v-4f499212]{z-index:3;background-color:#f5f5f5;position:-webkit-sticky;position:sticky;top:0}