.body {
	width: 1020px;
	margin-right: auto;
	margin-left: auto;
}
.box {
	float:left;
	width: 1020px;
	margin-top: 10px;
	margin-bottom: 20px;
}
.item {
	float: left;
	width: 200px;
	margin-right: 4px;
	margin-bottom: 4px;
}