.xd-box{
width: 1100px;
margin: 0px auto;
position: relative;
}
.xd1_kuang{
position: relative;
margin-top: 100px;
padding: 20px 45px;
border: 1px solid #ddd;
}
.xd1_kuang h2{
width: 156px;
text-align: center;
background-color: #fff;
position: absolute;
left: 455px;
top: -40px;
font-size: 25px;
}
.row-advantage {
margin: 0 auto;
text-align: center;
margin-top: 0px;
}
.col-advantage {
width: 170px;
display: inline-block;
margin: 0 -2px;
text-align: center;
vertical-align: middle;
}
.col-advantage img {
width: 50px;
height: 50px;
}
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