1.偏移 ``` .col-sm-offset-3 //向右偏移 ``` 2.排序 ``` //向左偏移 .col-sm-pull-3 //向右偏移 .col-sm-push-3 ``` 3.嵌套 ``` <div class="row"> <div class="col-sm-3"></div> <div class="col-sm-9"> //此处在嵌套一个网格 <div class="row"> <div class="col-sm-6"></div> <div class="col-sm-6"></div> </div> </div> </div> ```