@charset "utf-8";
#wrapper {
	background: url(../../img/bg_header.png) repeat-x;	
}
#container {
	width: 912px;
	margin: 0 auto;
}
#content_main {
	margin: 0 auto;
	width: 900px;
	padding-bottom: 20px;		
}
.img01 {
	display: block;
	width: 900px;
	height: 1105px;
}
#bottom_nav {
	width: 912px;
	margin: 0 auto;
	padding-bottom: 20px;
}
#bottom_nav ul {
	height: 172px;
}
#bottom_nav li {
	float: left;
	padding: 0 3px;
}
#bottom_nav li a {
	display: block;
	text-indent: -9999px;
	overflow: hidden;
	width: 298px;
	height: 172px;
}
#bottom_nav li a:hover {
	background-position: bottom;
}
.bottom_caution {
	background: url(../../img/bottom_link_01.png) no-repeat;	
}
.bottom_shellcube {
	background: url(../../img/bottom_link_02.png) no-repeat;	
}
.bottom_research {
	background: url(../../img/bottom_link_03.png) no-repeat;	
}