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;

    }

  }

}