/* ===== 関連バナー（共通） ===== */
.sub-banners {
  background: #fff;
  padding: 60px 0;
  border-top: 1px solid #c7c7c7;
}
.sub-banners__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(24px, 5vw, 80px);
  display: flex;
  gap: 20px;
  justify-content: center;
}
.sub-banners__item {
  flex: 1;
  max-width: 400px;
  display: block;
  transition: opacity 0.2s, transform 0.2s;
}
.sub-banners__item:hover {
  opacity: 0.9;
  transform: translateY(-3px);
}
.sub-banners__item img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 767px) {
  .sub-banners__inner {
    flex-direction: column;
    align-items: center;
    padding: 0 24px;
  }
  .sub-banners__item { max-width: 100%; }
}
@media (max-width: 640px) {
  .sub-banners { padding: 40px 0; }
  .sub-banners__inner { padding: 0 16px; gap: 14px; }
}