feat: 🎸 1. 新增scss居中函数,2.修改styles的less文件命名

src/main.ts

@@ -6,7 +6,7 @@ import router from '/@/router';
 import store from '/@/store';
 import './assets/font/iconfont.css';
 import './assets/app.css';
-import 'amfe-flexible';
+// import 'amfe-flexible';
 
 const app = createApp(App);
 

src/styles/mixin.scss

@@ -14,3 +14,10 @@
     }
   }
 }
+
+@mixin center {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+}