.comMsg-form select.purpose {
  padding-left: 18px;
  font-size: 16px;
  height: 48px;
  color: #333;
  margin: 20px 0 0 20px;
  width: calc((100% - 20px * 3) / 3);
  border-radius: 10px;
  border: 1px solid #e1e1e1;
  background: #fff;
  appearance: auto;
}

.comMsg-form select.purpose:first-child {
  margin-left: 0;
}

@media screen and (max-width: 768px) {
  .comMsg-form select.purpose {
    width: 100%;
    margin: 10px 0 0;
    font-size: 13px;
    height: 42px;
    padding-left: 10px;
    border-radius: 3px;
  }
}