/*----------------------------------------------------------------------------------------------------

  preparation
  
----------------------------------------------------------------------------------------------------*/

.plan-image {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.plan-image a {
  width: calc(50% - 12px);
}

@media screen and (max-width:700px) {
  .plan-image a {
    width: 100%;
    margin-bottom: 20px;
  }
}