浮动
.pull-left  {float: left;}
.pull-right {float: right;}
.clearfix   {...} // 清除浮动,参考
显示类型
.block            {display: block!important;}
.inline           {display: inline!important;}
.inline-block     {display: inline-block!important;}
.hidden           {display: hidden!important;}
.hide-empty:empty {display: hidden!important;}
.invisible        {visibility: hidden;}
液态化
.fluid   {width: 100%!important;}
.fluid-v {height: 100%!important;}