App.vue

<template>
  <div id="app">
    <router-view/>
  </div>
</template>

<script>
export default {
  name: 'App'
}
</script>

<style>
#app {
  font-family: "Helvetica Neue",
  Helvetica,
  "PingFang SC",
  "Hiragino Sans GB",
  "Microsoft YaHei",
  "微软雅黑",
  Arial,
  sans-serif;
}
  html,body{
    height: 100%;
  }
  *{
    margin: auto;
    padding: auto;
  }
</style>