/*内容*/
.substance{ width:1100px; height: 887px;position: relative; margin: 0 auto;  clear: both;
   background-image: url(../images/about_1.jpg)}
.substance h1{ text-align: center;margin-top: 30px; position:absolute;left: 532px;}  
.substance .mid .left{ float: left; height: 670px; width: 410px;margin-left:50px;
background-image: url(../images/about_2.jpg); margin-top: 130px;}
.substance .mid .right{float: right; width:460px;  height: 700px; margin-right: 60px; 
	margin-top: 100px; overflow-y:scroll; }
.substance .mid .right p{line-height: 35px;overflow: hidden;}