/* ===== サブセクション共通（about / faq） ===== */
.sub-section {
  padding-bottom: 80px;
  margin-bottom: 80px;
  border-bottom: 1px solid #c7c7c7;
}
.sub-section--last {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}
.sub-section__heading {
  text-align: center;
  margin-bottom: 56px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 767px) {
  .sub-section { padding-bottom: 56px; margin-bottom: 56px; }
  .sub-section__heading { margin-bottom: 40px; }
}
@media (max-width: 640px) {
  .sub-section { padding-bottom: 48px; margin-bottom: 48px; }
}