style

#item-list ul {
  padding: 0;
  margin: 20px 0;
  font-family: Arial, sans serif;
  color: #555;
}

#item-list ul > li {
  list-style: none;
  border-top: 1px solid #ddd;
  display: block;
  padding: 15px;
  overflow: hidden;
}

#item-list ul:last-child {
  border-bottom: 1px solid #ddd;
}

#item-list ul > li:hover {
  background: #151821;
}

.button {
  padding: 8px 12px;
  font-size: 14px;
  background: #ccc;
  display: block:
  width: 200px;
  border-radius: 3px;
  cursor: pointer;
}

.expand {
  display: block;
  text-decoration: none;
  color: #555;
  cursor: pointer;
}

h2 {
  padding: 0;
  margin: 0 0 5px 0;
  font-size: 18px;
}

span {
  font-size: 14px;
}

.detail {
  margin: 20px 0 0 0;
  display: none;
  line-height: 22px;
}

.right-arrow {
  width: 10px;
  height: 10px;
  float: left;
  font-weight: bold;
  font-size: 20px;
  margin: 15px 15px 0 0;
}