.cont-accesos-tips{ background: url(../imagenes/bg-main.jpg); width:100%; float:left; padding:0 0 40px 0;}

.ch-grid {
	margin: 0 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: 180px;
	height: 180px;
	display: inline-block;
	margin: 5px;
}