.top_bg{
	background-repeat: no-repeat;
	background-image: url(../images/contents/sg_bg.jpg);
	position: static;
	margin: 0px;
	padding: 0px;
	background-size: 100%;
	background-attachment: fixed;
	background-size: cover;
}
.body{
	width: 100%;
	height: 4000px;
	overflow-x: hidden;
}
/*本文*/
.contentsarea{
	height: 2300px;
	margin-right: auto;
	margin-left: auto;
	text-align: center;
	width: 1080px;
	position: relative;
}
#logo_o{
	position: absolute;
	top: 57px;
}