.ch-grid {
margin: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:100%;
height:365px;
display: inline-block;
}