fix postcss bug

src/App.vue

@@ -9,3 +9,7 @@
       name: 'APP'
     }
 </script>
+
+<style lang="scss">
+  @import './styles/index.scss'; // 全局自定义的css样式
+</style>

src/main.js

@@ -6,11 +6,10 @@ import router from './router';
 import store from './store';
 import ElementUI from 'element-ui';
 import 'element-ui/lib/theme-default/index.css';
-import 'assets/custom-theme/index.css'; // 换肤版本element-ui css https://github.com/PanJiaChen/custom-element-theme
+import 'assets/custom-theme/index.css'; // 换肤版本element-ui css
 import NProgress from 'nprogress'; // Progress 进度条
 import 'nprogress/nprogress.css';// Progress 进度条 样式
 import 'normalize.css/normalize.css';// normalize.css 样式格式化
-import 'styles/index.scss'; // 全局自定义的css样式
 import 'components/Icon-svg/index'; // 封装的svg组件
 import 'assets/iconfont/iconfont'; // iconfont 具体图标见https://github.com/PanJiaChen/vue-element-admin/wiki
 import * as filters from './filters'; // 全局vue filter

src/styles/index.scss

@@ -1,6 +1,6 @@
 @import './btn.scss';
 @import './element-ui.scss';
-@import "./mixin.scss";
+@import './mixin.scss';
 body {
   -moz-osx-font-smoothing: grayscale;
   -webkit-font-smoothing: antialiased;
@@ -108,7 +108,6 @@ code {
   margin-top: 30px;
 }
 
-
 .editor-container .CodeMirror {
   height: 100%!important;
 }