body {
	background: #FFFFFF;/* 背景色★ */
	text-align: left;
}
#container {
	width: 600px;
}
#header {
	padding-top: 50px;
}
#contents {

}
#utilitiesA {
	margin-top: 50px;
}
#utilitiesB {
	width: 600px;
	zoom: 1;
}
#pluginCategory1 {
	float: left;
	width: 300px;
}
#pluginCategory2 {
	float: right;
	width: 300px;
}
	@media screen {
		#pluginCategory1, #pluginCategory2 {
			overflow: hidden;
		}
	}
#utilitiesB:after {
	content: ".";
	display: block;
	visibility: hidden;
	height: 0.1px;
	font-size: 0.1em;
	line-height: 0;
	clear: both;
}
#footer {
	float: none;
	clear: both;
	zoom: 1;
}