section {
  padding-top: 150px;
  max-width: 600px;
  display: block;
  margin: 0 auto;
}

.content-collapse {
  border: 1px solid #ecf0f1;
  border-radius: 5px;
  margin-top: 2px;
  background-color: #ecf0f1;
}

.content-collapse a{
color: rgba(0,0,0,0.6);
}
    .content-collapse:hover {
    background: #999;
    }
     .content-collapse:hover a{
    
    color: #000;
    }

.content-collapse [data-toggle] {
  display: block;
  padding: 10px;
  cursor: pointer;
  backface-color: #555;
  -webkit-touch-fallback: none;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.content-collapse .content {
  display: none;
  border-top: 1px solid #e74c3c;
  padding: 10px 20px;
  background-color: #ecf0f1;
}

.content-collapse .open { display: block; }