.main_header {
	box-sizing: border-box;
	width: 100%;
	max-width: 680px;
	margin: 0 auto;
	padding: 14px;
	
	font-family: "微软雅黑";
}
.main_header .header_tit {
	width: 100%;
	min-height: 50px;
	line-height: 50px;
	font-size: 20px;
	
	color: #353131;
}
.main_header .header_txt {
	width: 100%;
    min-height: 32px;
    line-height: 32px;
    font-size: 16px;
}
.main_body {
	margin: 0 auto;
	padding-bottom: 0;
}
.img_wrap {
	width: 100%;
	margin: 0 auto;
}
.group_bg {
	background: url(../hadoop/group_bg.png) no-repeat;
	/*height: 800px;*/
	/*background: #000000;*/
}
.inner_img {
	display: block;
	
	width: 100%;
	max-width: 860px;
	margin: 0 auto;
}
.page_footer_wrap {
	margin: 0 auto;
}