.summary .allergy dl.aco dt {
  position:relative;
  cursor:pointer;
}
.summary .allergy dl.aco dt:after {
    border-right: 1px solid #fff;
    border-top: 1px solid #fff;
    content: "";
    display: block;
    height: 5px;
    margin-top: -5px;
    position: absolute;
    right: 5px;
    top: 50%;
    -webkit-transform: rotate(135deg);
    transform: rotate(135deg);
    width: 5px;
}
.summary .allergy dl.aco dt.active:after {
    margin-top: -2px;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
}

.summary .allergy dl.aco dd {
  display:none;
}
.summary .allergy dl.aco .active + dd {
  display:block;
}