ios底部安全区适配

<template>
  <!-- <meta name="viewport" content="...,viewport-fit=cover"> -->
  <div class="safe-area-inset-bottom"></div>
</template>

<script></script>

<style lang="scss" scoped>
.safe-area-inset-bottom {
  height: env(safe-area-inset-bottom);
  background: red;
}
</style>