.sy2_main{background:url(/yndzj/resource/cms/2016/05/2016050912284784638.jpg) center 0 repeat-y;}
.zt2_main{width:1000px;padding:10px;background: #fff;margin:0 auto;}
.banner3,.zt3_nav{max-width: 1500px;margin: 0 auto;}