1026

.content .list ul li:nth-child(5n+1){
/*5的倍数*/   选中5的倍数+1
margin-left: 0;
}
.content .list ul li:nth-child(5n){
/*5的倍数*/  
margin-right: 0;
}

<!--ul>(li>a>img+span.title+div>span.money>img>span.num)*15-->