@media screen and (max-width: 640px) {
  .design03 {
    width: 100%;
  }
  table.design03 th,
  table.design03 td {
    display: block;
    width: 100%;
    border-bottom:none;
  }
  .design03 tr:last-child{
    border-bottom: solid 1px #ccc;
  }
}