CSS 栅格布局

bootstrap3.0教程之栅格系统原理(布局)

http://www.jb51.net/css/152846.html

【div+css】栅格化布局样式备用坑

http://www.0773linji.com/article/index/id/69

CSS：用Less实现栅格系统

http://www.cnblogs.com/happyframework/p/3213595.html