.bgff{ background:#fff;}

.wapper{
	width: 1248px;
	margin:796px auto 0;
}
.body-bg{ position:relative; width:100%; height:8459px; background:url(bg.jpg) top center no-repeat;overflow:hidden;}
.nav{width:1079px; margin:0 auto;}

.erwei{ position:fixed;top:30%;width:240px; right:20px;}
.erwei img{display:block;width:240px; height:240px;}
.part1,.part2,.part3,.part4{ margin-top:40px; position:relative;}
.vide-box{ position:absolute; left: 169px;
    top: 354px;
    width: 465px;
    height: 260px;border-radius:10px;}
	
	.vide-box a{ display:block; width:100%; height:100%;}
	
	
.common_fixed{overflow:hidden}
.markbg{position:fixed;bottom:0px;left:0;width:100%;height:100%;background-color:#000;filter:Alpha(Opacity=50);opacity:0.5;overflow:hidden;z-index:10}
.dn{display:none}
.iframe-box{position:fixed;top:0;left:0;z-index:88;table-layout:fixed;width:100%;height:100%}
.iframe-box td{width:100%;height:100%;vertical-align:middle;position:relative}
.iframe-box iframe{display:block;margin:0 auto}
.iframe-box .closed{position:absolute;font-size:24px;display:none;left:50%;color:#fff;cursor:pointer;top:50%;width:36px;height:36px;background:url(closeds.png) no-repeat;text-indent:-9999px;z-index:99}