.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-grid:after {
	clear: both;
}

.ch-grid li {
	width: 280px;
	height: 220px;
	display: inline-block;
	margin-bottom: 80px;
}

@media only screen 
and (min-device-width : 320px) 
and (max-device-width : 667px) { 
    
    .ch-grid li {
        width: 280px;
        height: 220px;
        display: inline-block;
        margin-bottom: 80px;
    }
    
}