常用CSS代码（一）

<div class="box">
    <div class="content">这是内容区域</div>
</div>

<!-- start:css -->
<style>
    .box{
        text-align: center;width: 100px;
    }
    .content{
        display: inline-block;text-align: left;
    }
</style>    
<!-- end:css -->    

<div></div>


div {
    width: 0;
    height: 0;
    border: 30px solid;
    border-color: transparent transparent red;
}