class="row"
,行的里面写列(即格子系统)class="gird"
<div class="row">
<div class="col5 "> ... </div>
<div class="col4 "> ... </div>
</div>
class="row"
<div class="row">
<div class="col6 ">
<div class="row">
<div class="col3">
...
</div>
<div class="col3">
...
</div>
</div>
</div>
<div class="col3 ">
...
</div>
</div>d
.percent
<div class="percent">
<div class="row"> ... </div> </div>