#bn {
	height: 600px;min-width:1270px; width:100%;
	position: relative;
	overflow: hidden;
	margin-right: auto;
	margin-left: auto;
}
#bn .tu {min-width:1270px; width:100%;
	height:600px;
	text-align: center;
	display: block;
	margin-right: auto;
	margin-left: auto;
	
	
}

#bn #hao .xu {
	background-image: url(images/imagehei.png);
	display:inline;
	height:20px; 
	width:20px;
	margin-right:2px;
	line-height:20px;
	color: #FFFFFF;
	cursor:pointer;
	background-repeat: no-repeat;
	background-position: center center;
	border-top-width: 0px;
	border-right-width: 0px;
	border-bottom-width: 0px;
	border-left-width: 0px;
	border-top-style: solid;
	border-right-style: solid;
	border-bottom-style: solid;
	border-left-style: solid;
	text-align:center;
}

#hao { right:0px;
	border-top:0px solid  #BFBFBF;
	margin:0px auto;
	position: absolute;
	height:35px;
	width:25%;
	z-index: 3;
	bottom: 0px;
	text-align:center;
}
.bg{ width:100%; height:600px;display:block;  background:url(../images/banner_01bg.jpg) top center ; }

.bg2{ width:100%; height:600px;display:block;  background:url(../images/banner_02bg.jpg) top center  ;}