🐛 [Bug]: 在umi4.1.0中使用postcss-px-to-viewport似乎对react-vant并没有生效，对antdm成功产生了效果

[acutbh]

Which React Vant packages are impacted?

• [X] react-vant (React Vant core)
• [ ] react-vant-icons(React Vant Icon)

What version of React Vant are you using?

3.3.3

Reproduce live demo(codesandebox or stackblitz)?

No response

Descripition

以下是umi的配置 `import px2vw from 'postcss-px-to-viewport'; import { defineConfig } from 'umi';

export default defineConfig({ npmClient: 'npm', extraPostCSSPlugins: [ px2vw({ viewportUnit: 'vw', fontViewportUnit: 'vw', viewportWidth: 375, minPixelValue: 0.5, mediaQuery: false, }), ], }); `