请教一个问题
html｛font-size:62.5%｝
p{font-size:2rem}和p｛font-size:20px;｝没有区别，但是我为什么还要用rem呢？rem的意义在哪里？难道是根据屏幕尺寸的分辨率吗？
回复讨论(解决方案)
https://github.com/amfe/article/issues/17
建议看上面的文章，仔细阅读一二遍。
然后：
p{font-size:2rem}和p｛font-size:20px;｝
这两个还是有区别的，建议不同分辨率设备看一下，不同浏览器看一下，不同平台看一下。
比如：三星各个大小的，苹果各个大小的，小米各种大小的屏幕。
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