tree组件背景色、鼠标hover悬浮背景色、选中背景色修改

.headtree-container {   height: calc(100vh - 190px);   overflow: auto;     ::v-deep  .el-tree--highlight-current       .el-tree-node.is-current       > .el-tree-node__content {       background-color: #74bcff;     }
  ::v-deep .el-tree-node {     white-space: normal; //关键代码!!!!!!!!!     .el-tree-node__content {       height: 100%;       align-items: start;     }     .el-tree-node__content:hover {       background-color: #e1ff74 !important;     }     .el-tree-node:focus > .el-tree-node__content {       background-color: #74bcff !important;     }   } }