.banner{background-image: url(/style/images/sy.jpg);background-repeat: no-repeat;background-position: top center;width: 100%;
	height: 492px;}
.index_img1{background-image: url(/style/images/sy4.jpg);background-position: top center;background-repeat: no-repeat;
	height: 437px;}
.index_img2{background-image: url(/style/images/sy6.jpg?11);background-position: top center;background-repeat: no-repeat;
	height: 723px;}