/* ═══════════════════════════════════════════════════════════
   未阑星 · 品牌宣传片
   主题：夜未阑，星长明
   设计：Creative / editorial night film → App finale
   ═══════════════════════════════════════════════════════════ */

.promo-section {
  position: relative;
  overflow: hidden;
  border-block: 1px solid rgba(20, 21, 26, 0.08);
  background: #07080f;
  padding: 2.25rem 0 2.5rem;
  color: #f4f3ef;
}

.promo-inner {
  position: relative;
  z-index: 1;
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 640px) {
  .promo-section { padding: 2.75rem 0 3rem; }
  .promo-inner { padding: 0 2rem; }
}

.promo-header {
  max-width: 36rem;
  margin: 0 auto 0.75rem;
  text-align: center;
  min-height: 3.25rem;
}

.promo-brand {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #f9c862;
}

.promo-title {
  margin: 0.55rem 0 0;
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(1.15rem, 2.8vw, 1.45rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(250, 249, 246, 0.9);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(22px) scale(1.35);
  max-height: 0;
  overflow: hidden;
  transition:
    opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.45s,
    transform 1.05s cubic-bezier(0.22, 1, 0.36, 1) 0.35s,
    max-height 0.9s ease 0.35s,
    margin 0.9s ease 0.35s;
}

.promo-section.is-film-complete .promo-title {
  opacity: 1;
  transform: translateY(0) scale(1);
  max-height: 3rem;
}

/* ── Film stage ── */
.promo-film {
  position: relative;
  min-height: 480px;
  border-radius: 1.5rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #05060c;
  box-shadow:
    0 40px 90px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

@media (min-width: 768px) {
  .promo-film { min-height: 520px; }
}

.promo-sky {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

#promo-starfield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.promo-aurora {
  position: absolute;
  inset: 0;
  opacity: 0;
  /* Soft night wash only — not a bright blue blob */
  background:
    radial-gradient(ellipse 62% 44% at 50% 14%, rgba(89, 120, 250, 0.022), transparent 80%),
    radial-gradient(ellipse 42% 32% at 76% 28%, rgba(140, 92, 245, 0.016), transparent 80%);
  transition: opacity 1.6s ease;
}

.promo-horizon {
  display: none;
}

.promo-film.is-act-2 .promo-aurora,
.promo-film.is-act-3 .promo-aurora,
.promo-film.is-act-4 .promo-aurora,
.promo-film.is-act-5 .promo-aurora,
.promo-film.is-complete .promo-aurora {
  opacity: 0.4;
}

/* ── Layers ── */
.promo-layer {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.promo-layer--verse {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.25rem 4rem;
  text-align: center;
  transition:
    transform 1.35s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 1s ease;
  will-change: transform, opacity;
}

.promo-verse {
  margin: 0;
  font-family: Fraunces, Georgia, serif;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.1em;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(28px) scale(0.96);
  filter: blur(8px);
  transition:
    opacity 0.85s ease,
    transform 1.15s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.85s ease,
    font-size 1.15s cubic-bezier(0.22, 1, 0.36, 1),
    letter-spacing 1.15s ease;
}

.promo-verse--line {
  font-size: clamp(2.1rem, 7.5vw, 4.25rem);
  background: linear-gradient(120deg, #faf9f6 0%, #ffe9a8 42%, #c5d0ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.promo-verse-sub {
  margin: 1.2rem 0 0;
  max-width: 22rem;
  font-size: clamp(0.9rem, 2.4vw, 1.05rem);
  line-height: 1.6;
  color: rgba(244, 243, 239, 0.55);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.promo-film.is-act-1 .promo-verse--line,
.promo-film.is-act-2 .promo-verse--line {
  animation: promo-ink-in 1.45s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.promo-film.is-act-2 .promo-verse-sub {
  animation: promo-fade-up 1s ease 0.2s forwards;
}

/* One-line verse continuously travels toward header title */
.promo-film.is-act-3 .promo-layer--verse {
  transform: translateY(-22%) scale(0.78);
}

.promo-film.is-act-3 .promo-verse--line {
  opacity: 1;
  transform: none;
  filter: none;
  animation: none;
}

.promo-film.is-act-3 .promo-verse-sub {
  opacity: 0;
  transform: translateY(-8px);
  animation: none;
}

.promo-film.is-act-4 .promo-layer--verse {
  transform: translateY(-36%) scale(0.52);
}

.promo-film.is-act-4 .promo-verse--line {
  opacity: 1;
  transform: none;
  filter: none;
  animation: none;
  font-size: clamp(1.55rem, 4.8vw, 2.6rem);
  letter-spacing: 0.09em;
}

.promo-film.is-act-4 .promo-verse-sub {
  opacity: 0;
}

.promo-film.is-act-5 .promo-layer--verse,
.promo-film.is-complete .promo-layer--verse {
  /* Rise out of frame toward header title, then hand off */
  transform: translateY(calc(-50% - 12.25rem)) scale(0.3);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 1.45s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.85s ease 0.4s;
}

.promo-film.is-act-5 .promo-verse--line,
.promo-film.is-complete .promo-verse--line {
  opacity: 1;
  filter: none;
  animation: none;
  font-size: clamp(1.15rem, 2.8vw, 1.45rem);
  letter-spacing: 0.08em;
}

@keyframes promo-ink-in {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

@keyframes promo-fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes promo-layer-out {
  to {
    opacity: 0;
    transform: translateY(-18px);
    visibility: hidden;
  }
}

/* Companion — morph from lower center → top-right */
.promo-layer--companion {
  z-index: 6;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.55s ease;
}

.promo-film.is-act-3 .promo-layer--companion,
.promo-film.is-act-4 .promo-layer--companion,
.promo-film.is-act-5 .promo-layer--companion,
.promo-film.is-complete .promo-layer--companion {
  opacity: 1;
}

.promo-companion-cluster {
  position: absolute;
  left: 50%;
  top: 72%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  transform: translate(-50%, -50%) scale(1);
  transition:
    left 1s cubic-bezier(0.22, 1, 0.36, 1),
    top 1s cubic-bezier(0.22, 1, 0.36, 1),
    transform 1s cubic-bezier(0.22, 1, 0.36, 1),
    gap 0.85s ease;
  will-change: left, top, transform;
}

.promo-film.is-act-4 .promo-companion-cluster,
.promo-film.is-act-5 .promo-companion-cluster,
.promo-film.is-complete .promo-companion-cluster {
  left: auto;
  right: 0.35rem;
  top: 1rem;
  flex-direction: row;
  align-items: flex-start;
  gap: 0.65rem;
  transform: translate(0, 0) scale(0.95);
}

.promo-star-orb {
  width: 4rem;
  height: 4rem;
  border-radius: 9999px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
  background: linear-gradient(135deg, #5978fa, #8c5cf5);
  box-shadow:
    0 0 0 0 rgba(89, 120, 250, 0.18),
    0 0 28px rgba(140, 92, 245, 0.22);
  animation: promo-orb-pulse 2.4s ease-in-out infinite;
  transition: width 0.95s ease, height 0.95s ease, font-size 0.95s ease, box-shadow 0.95s ease;
  flex-shrink: 0;
}

.promo-film.is-act-4 .promo-star-orb,
.promo-film.is-act-5 .promo-star-orb,
.promo-film.is-complete .promo-star-orb {
  width: 2.25rem;
  height: 2.25rem;
  font-size: 0.8rem;
  animation: none;
  box-shadow: 0 0 14px rgba(140, 92, 245, 0.22);
}

@keyframes promo-orb-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(89, 120, 250, 0.18), 0 0 24px rgba(140, 92, 245, 0.2); }
  50% { box-shadow: 0 0 0 10px rgba(89, 120, 250, 0), 0 0 34px rgba(140, 92, 245, 0.3); }
}

.promo-whisper {
  max-width: min(90vw, 380px);
  padding: 0.9rem 1.15rem;
  border-radius: 1rem 1rem 1rem 0.35rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(18, 20, 31, 0.9);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  text-align: left;
  transition: max-width 0.95s ease, padding 0.95s ease, border-radius 0.95s ease;
}

.promo-film.is-act-4 .promo-whisper,
.promo-film.is-act-5 .promo-whisper,
.promo-film.is-complete .promo-whisper {
  max-width: min(42vw, 248px);
  width: auto;
  min-width: 0;
  padding: 0.75rem 1.05rem;
  border-radius: 0.85rem 0.85rem 0.85rem 0.3rem;
}

.promo-whisper__name {
  margin: 0 0 0.25rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: #a8b8ff;
}

.promo-whisper__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: rgba(244, 243, 239, 0.9);
  transition: font-size 0.95s ease;
}

.promo-film.is-act-4 .promo-whisper__text,
.promo-film.is-act-5 .promo-whisper__text,
.promo-film.is-complete .promo-whisper__text {
  font-size: 0.86rem;
  line-height: 1.5;
  white-space: normal;
}

@media (max-width: 767px) {
  .promo-film.is-act-4 .promo-whisper,
  .promo-film.is-act-5 .promo-whisper,
  .promo-film.is-complete .promo-whisper {
    display: none;
  }

  .promo-film.is-act-3 .promo-companion-cluster {
    top: 78%;
  }
}

/* Product shot stack — all feature images on page */
.promo-layer--product {
  opacity: 0;
  z-index: 3;
  pointer-events: none;
}

.promo-film.is-act-4 .promo-layer--product,
.promo-film.is-act-5 .promo-layer--product,
.promo-film.is-complete .promo-layer--product {
  animation: promo-product-in 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  pointer-events: none;
}

@keyframes promo-product-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.promo-shot-stack {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.15rem 1rem 3.75rem;
  perspective: 1200px;
}

.promo-shot {
  position: absolute;
  left: 50%;
  top: 54%;
  width: min(40vw, 210px);
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  font: inherit;
  color: inherit;
  cursor: pointer;
  pointer-events: auto;
  transform-origin: center 88%;
  transition:
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.4s ease,
    filter 0.4s ease,
    width 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform, opacity, filter;
}

.promo-shot__frame {
  --bezel: 9px;
  --outer-r: 26px;
  --inner-r: calc(var(--outer-r) - var(--bezel));
  display: block;
  border-radius: var(--outer-r);
  padding: var(--bezel);
  background: linear-gradient(145deg, #3a3b42 0%, #1a1b22 55%, #0d0e12 100%);
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.48),
    0 0 0 1px rgba(255, 255, 255, 0.1) inset,
    0 0 36px rgba(89, 120, 250, 0.06);
  overflow: hidden;
  aspect-ratio: 2048 / 2732;
}

.promo-shot__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center top;
  border-radius: var(--inner-r);
  background: #0a0a0c;
}

.promo-shot__label {
  display: block;
  margin-top: 0.4rem;
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: rgba(244, 243, 239, 0.55);
  opacity: 0;
  transition: opacity 0.3s ease, color 0.3s ease;
}

.promo-shot.is-front {
  z-index: 20;
  width: min(44vw, 248px);
  cursor: default;
  filter: none;
}

.promo-shot.is-front .promo-shot__label {
  opacity: 1;
  color: rgba(250, 249, 246, 0.9);
}

.promo-shot:not(.is-front):hover .promo-shot__frame,
.promo-shot:not(.is-front):focus-visible .promo-shot__frame {
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(249, 200, 98, 0.45) inset,
    0 0 28px rgba(249, 200, 98, 0.18);
  outline: none;
}

.promo-shot:not(.is-front):focus-visible {
  outline: none;
}

.promo-shot[data-promo-shot="home"]:not(.is-front) {
  cursor: pointer;
}

.promo-shot[data-promo-shot="home"]:not(.is-front) .promo-shot__label {
  opacity: 0.85;
  color: #f9c862;
}

@media (min-width: 768px) {
  .promo-shot {
    width: min(20vw, 216px);
  }

  .promo-shot.is-front {
    width: min(23vw, 252px);
  }

  .promo-shot.is-front .promo-shot__frame {
    --bezel: 10px;
    --outer-r: 28px;
  }
}

/* Finale — tags only, no frame, evenly spaced */
.promo-layer--finale {
  z-index: 5;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 6.5rem 1.05rem 1rem;
  opacity: 0;
  transform: translateY(18px);
  pointer-events: none;
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.promo-film.is-act-5 .promo-layer--finale,
.promo-film.is-complete .promo-layer--finale {
  opacity: 1;
  transform: translateY(0);
  pointer-events: none;
  z-index: 8;
}

.promo-finale {
  width: 100%;
  max-width: 44rem;
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  text-align: center;
  pointer-events: none;
}

.promo-finale__tags {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-evenly;
  align-items: center;
  gap: 0.35rem;
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  pointer-events: none;
}

.promo-finale__tags li {
  flex: 1 1 0;
  text-align: center;
  list-style: none;
  opacity: 0;
  transform: translateY(10px);
}

.promo-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 36px;
  margin: 0;
  border: none;
  border-radius: 999px;
  background: transparent;
  padding: 0.35rem 0.4rem;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(244, 243, 239, 0.78);
  cursor: pointer;
  pointer-events: auto;
  transition:
    color 0.2s ease,
    background 0.2s ease,
    transform 0.2s ease;
}

.promo-tag:hover,
.promo-tag:focus-visible {
  color: #faf9f6;
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.promo-tag:focus-visible {
  box-shadow: 0 0 0 2px rgba(249, 200, 98, 0.55);
}

.promo-tag:active {
  transform: scale(0.96);
}

.promo-tag.is-active {
  color: #faf9f6;
  background: rgba(249, 200, 98, 0.14);
  box-shadow: 0 0 0 1px rgba(249, 200, 98, 0.28);
}

.promo-film.is-act-5 .promo-finale__tags li,
.promo-film.is-complete .promo-finale__tags li {
  animation: promo-tag-in 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.promo-finale__tags li:nth-child(1) { animation-delay: 0.05s; }
.promo-finale__tags li:nth-child(2) { animation-delay: 0.12s; }
.promo-finale__tags li:nth-child(3) { animation-delay: 0.19s; }
.promo-finale__tags li:nth-child(4) { animation-delay: 0.26s; }
.promo-finale__tags li:nth-child(5) { animation-delay: 0.33s; }
.promo-finale__tags li:nth-child(6) { animation-delay: 0.4s; }

@keyframes promo-tag-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Replay — bottom right */
.promo-replay {
  position: absolute;
  z-index: 12;
  right: 0.85rem;
  bottom: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 0.9rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(10, 12, 22, 0.75);
  backdrop-filter: blur(10px);
  font-size: 0.75rem;
  font-weight: 600;
  color: rgba(244, 243, 239, 0.78);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition:
    opacity 0.4s ease,
    transform 0.4s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    background 0.2s ease;
}

.promo-film.is-act-5 .promo-replay,
.promo-film.is-complete .promo-replay {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.promo-replay:hover {
  border-color: rgba(168, 184, 255, 0.4);
  color: #faf9f6;
  background: rgba(18, 22, 36, 0.9);
}

.promo-replay:focus-visible {
  outline: 2px solid #a8b8ff;
  outline-offset: 3px;
}

/* Progress bar */
.promo-progress {
  position: absolute;
  z-index: 6;
  left: 1rem;
  right: 1rem;
  bottom: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.promo-progress__bar {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #5978fa, #f9c862);
  transform-origin: left center;
}

.promo-film.is-playing .promo-progress__bar {
  animation: promo-progress-fill 14s linear forwards;
}

.promo-film.is-complete .promo-progress__bar {
  width: 100%;
  animation: none;
}

@keyframes promo-progress-fill {
  from { width: 0%; }
  to { width: 100%; }
}

/* Mobile */
@media (max-width: 767px) {
  .promo-film { min-height: 520px; }

  .promo-shot-stack {
    padding: 1rem 0.75rem 7.5rem;
  }

  .promo-shot {
    top: 52%;
    width: min(44vw, 168px);
  }

  .promo-shot.is-front {
    width: min(50vw, 198px);
  }

  .promo-shot__frame {
    --bezel: 7px;
    --outer-r: 20px;
  }

  .promo-finale {
    max-width: none;
  }

  .promo-finale__tags {
    flex-wrap: wrap;
    justify-content: space-evenly;
    row-gap: 0.45rem;
  }

  .promo-finale__tags li {
    flex: 0 0 30%;
  }

  .promo-tag {
    font-size: 0.68rem;
  }

  .promo-layer--finale {
    padding: 0 5.5rem 1rem 0.75rem;
  }

  .promo-replay {
    min-height: 36px;
    font-size: 0.7rem;
    padding: 0 0.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .promo-film.is-playing .promo-progress__bar {
    animation: none;
    width: 100%;
  }

  .promo-verse,
  .promo-verse-sub,
  .promo-layer--companion,
  .promo-layer--product,
  .promo-layer--finale,
  .promo-shot,
  .promo-star-orb,
  .promo-replay {
    animation: none !important;
    opacity: 1 !important;
    filter: none !important;
    visibility: visible !important;
  }

  .promo-shot {
    transition: none !important;
  }

  .promo-layer--verse {
    opacity: 0 !important;
    visibility: hidden !important;
  }

  .promo-title {
    opacity: 1 !important;
    transform: none !important;
    max-height: 3rem !important;
  }

  .promo-replay {
    pointer-events: auto !important;
  }

  .promo-layer--companion {
    opacity: 1 !important;
    visibility: visible !important;
  }

  .promo-companion-cluster {
    left: auto !important;
    right: 0.35rem !important;
    top: 1rem !important;
    flex-direction: row !important;
    align-items: flex-start !important;
    gap: 0.55rem !important;
    transform: translate(0, 0) scale(0.92) !important;
    transition: none !important;
  }

  .promo-star-orb {
    width: 2.25rem !important;
    height: 2.25rem !important;
    font-size: 0.8rem !important;
  }

  .promo-finale__tags li {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
}