.sub_category_box{
  background: #f5f5f5;
  margin-bottom: 20px;
  padding: 2px 0;
}
.sub_category_box .sub_category_img{
  float: left;
  margin-top: 3px;
  margin-bottom: 3px;
}
.sub_category_box .sub_category_subject{
  float: left;
  margin: 5px 10px;
}
.sub_category_box .sub_category_img:nth-child(3n),
.sub_category_box .sub_category_img:nth-child(3n+2){
	margin-left: 5px;
}