<template>   <div class="app_container">     <div class="common-layout">       <el-container>         <el-aside width="200px" class="aside">Aside</el-aside>         <el-container>           <el-header class="header">Header</el-header>           <el-main class="main">Main</el-main>         </el-container>       </el-container>     </div>   </div> </template>   <script>   export default{     name: 'app',     setup(){            },   } </script>   <style scoped>   /* 手动配置全局样式 */   html,   body,   .app_container,   .el-container{     padding: 0;     margin: 0;     height: 100vh;   }   /* 背景颜色 */   .aside{     background-color: pink;   }   .main{     background-color: forestgreen;   }   .header{     background-color: aqua;   } </style>