http://blog.csdn.net/fengri5566/article/details/9414599
https://isux.tencent.com/web-app-rem.html
http://zhidao.baidu.com/culture/topic?name=fengzheng
http://www.chinaz.com/web/2015/0720/424619.shtml
http://www.chinaz.com/web/2015/1110/468774.shtml
http://www.runoob.com/css/css-rwd-viewport.html
