横线用到了伪类进行实现。
css:
h4,h5 {
text-align: center;
}
h5{
color: gray;
}
.onimg_title:before{
display: inline-block;
position: relative;
top:-7px;
right: 20px;
content: "";
width: 100px;
height: 0px;
border: 1px solid black;
}
.onimg_title:after{
display: inline-block;
position: relative;
top:-7px;
left: 20px;
content: "";
width: 100px;
height: 0px;
border: 1px solid black;
}
html:
<div >
<h4> <span class="onimg_title">买实惠</span></h4>
<h5>热门促销</h5>
</div>
原文：http://www.cnblogs.com/iriliguo/p/6561242.html