div+css一行三列

 <style>
#1
{
    float: left;
    border: 1px solid black;
    text-align: center;
    width: 180px;
    height: 26px;
    padding-top: 3px;
}
#2
{
    float: left;
    border-top: 1px solid black;
    border-bottom: 1px solid black; 
    text-align: center;
    width: 180px;
    height: 26px;
    padding-top: 3px;
}
#3
{
    float:left;
    border: 1px solid black;
    text-align:center;
    width:120px;
    height:26px;
    padding-top: 3px;
}
.bg_color
{
    background-color: #CCFFFF;
}

</style>
<div id="1" class="bg_color">1、填寫綁定資訊</div>
<div id="2">2、傳送簡訊確認碼</div>
<div id="3">3、完成綁定</div>