.fl {float:left;}
.fr {float:right;}
.clearfix:after {content:'';display: block;clear: both;}
.clearfix {zoom: 1;}

.section_title{
    padding: 50px 0;
    text-align: center;
    line-height: 34px;
    font-size: 34px;
}
.section {
    padding-bottom: 20px;
    clear:both;
}
  
.section .item_box{
  width: 1228px;
  margin: 0 auto;
  
}

.section .part_box{
  width: 1228px;
  margin: 0 auto;
}