需要在`vue.config.js`添加[css配置](https://cli.vuejs.org/zh/config/#css-extract) ``` css.extract: false ``` 害惨我了,找了很久的时间才找到这里的问题,建议尽快发布个新版 [https://github.com/vuejs/vue-cli/issues/3091](https://github.com/vuejs/vue-cli/issues/3091)