Use rem in mobile web according to design's width with less.js.

移动web响应式适配方案（基于媒体查询和less）

How to use

1. Download rem.less
2. Use in your less file

  @import "rem.less";
  .UseRem(750); /* 750(px) */
  
  body {
    font-size: .16rem; /* 16px in design */
  }