.pc-only {
  display: block; }
  @media screen and (max-width: 480px) {
    .pc-only {
      display: none; } }

@media screen and (max-width: 480px) {
  .section-topicsbox .txtbox {
    padding: 0 15px; } }
.section-topicsbox .txtbox .ph-main {
  max-width: 763px;
  margin: 0 auto; }
  .section-topicsbox .txtbox .ph-main img {
    width: 100%; }
.section-topicsbox .txtbox .mein-txt {
  margin-top: 30px;
  line-height: 2;
  font-size: 14px; }