.ch-grid {
	margin: 20px 0 0 0;
	padding: 0;
	list-style: none;
	display: block;
	text-align: center;
	width: 100%;
}

.ch-grid:after,
.ch-item:before {
	content: '';
    display: table;
}

.ch-item_A:before {
	content: '';
    display: table;
}
.ch-item_B:before {
	content: '';
    display: table;
}
.ch-item_C:before {
	content: '';
    display: table;
}
.ch-item_D:before {
	content: '';
    display: table;
}
.ch-item_E:before {
	content: '';
    display: table;
}
.ch-item_F:before {
	content: '';
    display: table;
}
.ch-item_G:before {
	content: '';
    display: table;
}
.ch-grid:after {
	clear: both;
}

.ch-grid li {
	width: 220px;
	height: 220px;
	display: inline-block;
	margin: 20px;
}
.ch-grid2 li {
	width: 160px;
	height: 160px;
	display: inline-block;
	margin: 20px;
}