/* Introduction film: compact, on-demand, and scoped to the homepage. */
#about .home-intro-video-layout {
  width: 100%; max-width: 1100px; display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
  gap: 48px; align-items: center;
}
.intro-film { min-width: 0; margin: 0; }
.intro-film-label { display: inline-flex; align-items: center; gap: 7px; margin: 0 0 10px; padding: 4px 13px; border-radius: 30px; background: #ebf0e4; color: #315640; font-size: 12px; font-weight: 700; line-height: 1.8; }
.intro-film h3 { color: var(--deep); font-size: 20px; line-height: 1.7; margin: 0 0 15px; }
.intro-film-link { display: block; position: relative; overflow: hidden; border-radius: 18px; border: 1px solid #dddcc8; background: #f8f6e9; box-shadow: 0 9px 26px #314c3610; color: #fff; }
.intro-film-preview { display: block; position: relative; }
.intro-film-link img { display: block; width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; }
.intro-film-play { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 74px; height: 74px; border-radius: 50%; background: #315640f2; border: 3px solid #fff; display: grid; place-items: center; box-shadow: 0 4px 18px #223a3926; transition: background .2s, scale .2s; }
.intro-film-play svg { width: 27px; height: 27px; margin-left: 4px; fill: currentColor; }
.intro-film-duration { position: absolute; right: 12px; bottom: 12px; background: #20382ce8; color: #fff; font-size: 12px; font-weight: 700; line-height: 1.6; padding: 2px 7px; border-radius: 4px; }
.intro-film-playbar { display: flex; justify-content: center; align-items: center; gap: 12px; padding: 15px 18px; min-height: 56px; background: #315640; color: #fff; line-height: 1.6; transition: background .2s; }
.intro-film-playbar strong { font-size: 16px; letter-spacing: .04em; }
.intro-film-playbar>span:first-child { font-size: 14px; }
.intro-film-sound { font-size: 11px; font-weight: 400; border-left: 1px solid #ffffff66; padding-left: 12px; }
.intro-film-link:hover .intro-film-playbar { background: #224330; }
.intro-film-link:hover .intro-film-play { background: #224330; scale: 1.07; }
.intro-film-link:focus-visible { outline: 3px solid #526b3c; outline-offset: 5px; }
.intro-film-caption { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 12px; line-height: 1.8; color: var(--muted); margin-top: 12px; }
.intro-film-caption strong { font-weight: 700; color: var(--deep); }
body.intro-film-open { overflow: hidden; }
#introduction-video-dialog { width: min(880px, calc(100% - 32px)); max-height: calc(100dvh - 32px); padding: 25px; text-align: left; border-radius: 20px; }
#introduction-video-dialog h2 { font-size: 21px; line-height: 1.7; margin: 0 44px 17px 0; }
#introduction-video-dialog .dialog-close { width: 44px; height: 44px; top: 12px; right: 12px; }
#introduction-video-dialog video { display: block; width: 100%; height: auto; max-height: 62dvh; aspect-ratio: 16/9; background: #101912; border-radius: 10px; }
.intro-film-actions { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-top: 18px; }
.intro-film-actions p { font-size: 12px; color: var(--muted); line-height: 1.8; margin: 0; }
.intro-film-actions .button { font-size: 12px; padding: 12px 18px; min-height: 46px; gap: 10px; }
.intro-film-fallback { font-size: 12px; line-height: 1.8; margin-top: 12px; color: var(--muted); }
.intro-film-fallback a { text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 960px) {
  #about .home-intro-video-layout { gap: 28px; }
  .intro-film h3 { font-size: 18px; }
}
@media (max-width: 760px) {
  body:not(.subpage) #about .home-intro-video-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 30px; text-align: left; }
  #about .home-intro-video-layout .section-title { text-align: left; }
  .intro-film { width: 100%; max-width: 480px; justify-self: center; }
  .intro-film h3 { margin-bottom: 12px; }
  .intro-film-play { width: 60px; height: 60px; }
  .intro-film-playbar { padding: 12px; min-height: 50px; gap: 10px; }
  .intro-film-playbar strong { font-size: 14px; }
  .intro-film-sound { font-size: 10px; padding-left: 10px; }
  .intro-film-caption { font-size: 11px; margin-top: 10px; }
  #introduction-video-dialog { padding: 21px 16px 18px; }
  #introduction-video-dialog h2 { font-size: 18px; margin-bottom: 16px; }
  .intro-film-actions { flex-direction: column; align-items: stretch; gap: 12px; }
  .intro-film-actions .button { justify-content: center; font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) { .intro-film-play, .intro-film-playbar { transition: none; } }