fix postcss bug

src/App.vue

   name: 'app'
 }
 </script>
+<style lang="scss">
+  @import './styles/index.scss'; // 全局自定义的css样式
+</style>
+
 

src/main.js

 import 'element-ui/lib/theme-default/index.css'
 import NProgress from 'nprogress'
 import 'normalize.css/normalize.css'
-import '@/styles/index.scss' // 全局自定义的css样式
 import '@/assets/iconfont/iconfont'
 import IconSvg from '@/components/Icon-svg/index.vue'
 

src/styles/index.scss

 @import './element-ui.scss';
-@import "./mixin.scss";
+@import './mixin.scss';
 body {
   -moz-osx-font-smoothing: grayscale;
   -webkit-font-smoothing: antialiased;