/*内容*/
h2{font-size: 23px;}
.substance{ width:1200px; height: 600px;position: relative; margin: 0 auto;  clear: both;}
.substance .lefttop{height: 22px;}
.substance .lefttop ul{float: left;margin-left: 20px;}
.substance .lefttop ul li{float: left; margin-left: 5px;}

.substance .mid {
    width: 1180px;
    height: 450px;
    margin-top: 20px;
    overflow: hidden;
}
.substance .mid img{margin: 12px;}
.substance .mid li a img{ width:253px}
.substance .mid h3,h2{text-align: center;}
.substance .mid p{padding: 10px 15px;text-indent: 2em;}    

.substance .mid ul{margin-right: -20px;}
.substance .mid ul li{ width: 280px; height: 450px; background-color: #eaeaea; 
	float: left; margin: 20px 20px 0px 0px;}
.substance .mid ul li img{ border:1px solid #eaeaea;}



.substance .mid .left_img{position: absolute;left: -80px; top:200px;}
.substance .mid .right_img{position: absolute;right: -60px; top:200px;}

.substance .mid h3{ font-size:17px}
.substance .mid h2{ font-size:17px}