ihotel-manage/admin/src/App.vue

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

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

<style>
#app {
    font-family: 'Avenir', Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    width: 100%;
    height: 100%;
}

html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;

}
</style>