import './assets/main.css' should be placed at the first line in main.ts

[lovetingyuan]

App.vue and main.css are imported in main.ts, but main.css is placed after App.vue, so in the build css output, the content of main.css is behind the css of App.vue, but main.css contains base css, which should be allowed to be rewritten by other css, eg component css.

should be like: