手机弹性布局

http://www.kuqin.com/shuoit/20150420/345774.html?url_type=39&object_type=webpage&pos=1

http://www.w3cplus.com/

http://www.jb51.net/web/133779.html

字体设置：http://www.w3cplus.com/css3/define-font-size-with-css3-rem