#offices{
  margin: 1em 0 0 0;
  padding: 0;
  float: left;
  border: none;
  border-top: 1px solid #cccccc;
  z-index: 1;
  height: 500px;
}

#offices li{
  list-style: none;
  width: 275px;
}

#offices li ul{
  margin: 0;
  padding: 0;
  border: 1px solid #cccccc;
  border: none;
  border-top: 1px solid #cccccc;
  visibility: hidden;
  position: absolute;
  z-index: 100;
}

#offices li ul li ul{
  margin: 0;
  padding: 0;
  position: absolute;
  border: none;
  border-top: 1px solid #cccccc;
  visibility: hidden;
  z-index: 200;
}

#offices a{
  display: block;
  padding: 0.5em;
  border: 1px solid #cccccc;
  border-top: none;
  margin: 0 0 0 0;
  background-position-x: right;
  background-position-y: center;
  text-decoration: none;
}

#offices .active{
  background: #efefef;
  background-position-x: right;
  background-position-y: center;
}