/* Feature banners above Q&A・SNS on the top page (the client's 2026-11-03 handoff): 438x210 each, 24px apart, so two
   fill the 900px content width; a single banner stays centred at that size. A div, not a section, so it does not get
   the cream box of #contents section; the margins copy .toppast's. */
.topbanners {
  margin-top: calc((20 / 1440) * 100vw);
}
.topbanners__list {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.topbanners__item {
  flex: 0 1 438px;
  min-width: 0;
}
.topbanners__item a,
.topbanners__item img {
  display: block;
}
.topbanners__item img {
  width: 100%;
  height: auto;
}
@media (max-width: 668px) {
  .topbanners {
    margin-top: calc((12 / 750) * 100vw);
  }
  .topbanners__list {
    flex-direction: column;
    gap: 16px;
  }
  .topbanners__item {
    flex-basis: auto;
  }
}