.main_content{ background:url(/Sites/Uploaded/UserUpLoad/20161121/20161121162048.jpg) no-repeat; height:650px;}
.article_ul{ padding-top:200px}
.article_ul li{ width:33.33%; float:left; }
.article_ul li a{ display:block; margin:0 auto; width:254px; height:254px;}
.article_ul li a:hover{ background:#126089; border-radius:50%;}
@media only screen and (max-width:768px)
{
.article_ul li a{ display:block; margin:0 auto; width:100%; height:254px; text-align:center}
.article_ul li a img{ width:90%}	
	}
@media only screen and (max-width:435px)
{
.article_ul{ padding-top:252px}
}
@media only screen and (max-width:375px)
{
.article_ul{ padding-top:35px;}
.article_ul li{ width:100%; float:none; margin-bottom:20px}
.article_ul li a{ height:auto}	
.article_ul li a img{ width:175px;}
}