body{margin:0;padding:0;background:url(/images/theme/default/body_bg.png) no-repeat;background-position:top center;font-family:"微软雅黑";}.header{background: url(/images/theme/default/head_bg.png) no-repeat center top;height: 481px;width: 1000px;margin: auto;overflow: hidden;}.header_second{background:url(/images/theme/default/head_bg.png) repeat-x;height:317px;width:1000px;margin:auto;overflow:hidden;}