移动端H5之css配置rem

@media (min-width: 320px){html{font-size: 42.6667px;} }
@media (min-width: 360px){html{font-size: 48px;} }
@media (min-width: 375px){html{font-size: 50px;} }
@media (min-width: 384px){html{font-size: 51.2px;} }
@media (min-width: 414px){html{font-size: 55.2px;} }
@media (min-width: 448px){html{font-size: 59.7333px;} }
@media (min-width: 480px){html{font-size: 48px;} }
@media (min-width: 512px){html{font-size: 68.2667px;} }
@media (min-width: 544px){html{font-size: 72.5333px;} }
@media (min-width: 576px){html{font-size: 76.8px;} }
@media (min-width: 608px){html{font-size: 81.0667px;} }
@media (min-width: 640px){html{font-size: 85.3333px;} }
@media (min-width: 750px){html{font-size: 100px;} }
@media (min-width: 800px){
  body,
  html{
    width: 400px;
    margin: 0 auto;
  }
  html{
    font-size: 50px;
  }
}