.cd-accordion-menu input[type=checkbox] {
position: absolute;
opacity: 0;
}
.cd-accordion-menu label, .cd-accordion-menu a {
position: relative;
display: block;
padding: 18px 18px 18px 64px;
background: #4d5158;
box-shadow: inset 0 -1px #555960;
color: #ffffff;
font-size: 1.6rem;
}
.cd-accordion-menu ul {
display: none;
}
 
.cd-accordion-menu input[type=checkbox]:checked + label + ul,
.cd-accordion-menu input[type=checkbox]:checked + label:nth-of-type(n) + ul {
display: block;
}