system-file/web-vue/src/App.vue

<template>
  <router-view />
</template>

<style>
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Microsoft YaHei', sans-serif;
  background: #f5f7fa;
}
</style>