.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: 240px;
height: 240px;
display: inline-block;
margin: 20px;
}