#nav ul li{margin:0 20px}

.main_box{background:#303030 url('http://i.tianyuan161.com/images/zt/315/top_bg.jpg') repeat-x top center;font-family:'微软雅黑','宋体',Arial}
.main_box .main_top{background:url('http://i.tianyuan161.com/images/zt/315/top.jpg') 0 0 no-repeat;width:1000px;height:440px;margin:0 auto;}
#main_top_below{background:#181818;height:16px}
.box{background:#01395a;text-align:center}