Multiple issues with DevExtreme - Vue-Template 3.0

[objcxiaobai]

I created the project in the following way：
npx -p devextreme-cli devextreme new vue-app xb-name --layout=side-nav-inner-toolbar --version=3
and
npx -p devextreme-cli devextreme new vue-app app-name --layout=side-nav-outer-toolbar --version=3

The following questions were asked：
1.The layout of the two projects is exactly the same
2.The header and buttons in the Header-Toolbar component are white
3.The target property of the dx-context-menu component in the user-panel component does not work on the parent css