1.每个html中需要加入<meta>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />
原文：http://www.cnblogs.com/lianghui66/p/4048998.html