/* 看见水 · 深蓝到冰蓝，产品电影气质 */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--foam);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  background:
    radial-gradient(120% 80% at 70% 40%, var(--bg-2) 0%, transparent 46%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-1) 52%, var(--bg) 100%);
  color: var(--foam);
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
button, a { font: inherit; color: inherit; }
button { appearance: none; cursor: pointer; }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--foam);
  color: var(--ink-on-light);
  padding: 8px 16px;
  z-index: 80;
}
.skip:focus { left: 16px; top: 16px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- stage ---------- */
#stage-wrap {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--bg);
}
#stage {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}
#stage-wrap.is-live { pointer-events: auto; }
#stage-wrap.is-live .stage-fallback { display: none; }
.stage-fallback {
  position: absolute;
  inset: 0;
  margin: auto;
  width: auto;
  height: min(82vh, 720px);
  object-fit: contain;
  filter: saturate(0.9) contrast(1.05);
  opacity: 0.88;
  pointer-events: none;
}
body.is-ready #stage-wrap:not(.is-failed) .stage-fallback { display: none; }
body.is-failed .stage-fallback { display: block; }
body[data-chapter="facts"] #stage-wrap {
  opacity: 0.12;
  transition: opacity var(--t-struct) var(--ease-in-out);
}
body[data-chapter="films"] #stage-wrap { opacity: 0.55; }
#stage-wrap {
  transition: opacity var(--t-struct) var(--ease-in-out);
}

/* ---------- chrome ---------- */
.top {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 16px var(--pad-compact);
  padding-top: max(16px, env(safe-area-inset-top));
  pointer-events: none;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity var(--t-ui) var(--ease-out), transform var(--t-ui) var(--ease-out);
}
body.is-ready:not([data-chapter="enter"]) .top {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.top-mark {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0.14em;
  text-decoration: none;
}
.top-brand {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.rail {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  display: none;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  padding: 0 24px 0 0;
}
.rail a {
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  padding: 6px 0 6px 12px;
  border-right: 1px solid transparent;
  transition: color var(--t-ui) var(--ease-out), border-color var(--t-ui) var(--ease-out);
}
.rail a:hover { color: var(--foam); }
.rail a.is-on {
  color: var(--ice);
  border-right-color: var(--ice);
}

body[data-chapter="enter"] .pager { display: none; }
body[data-chapter="facts"] .top,
body[data-chapter="facts"] .top-mark,
body[data-chapter="facts"] .top-brand { color: var(--ink-on-light); }
body[data-chapter="facts"] .rail a { color: #3A4A52; }
body[data-chapter="facts"] .rail a.is-on {
  color: var(--ink-on-light);
  border-right-color: var(--ink-on-light);
}

.pager {
  position: fixed;
  z-index: 30;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px var(--pad-compact);
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  pointer-events: none;
}
.pager .btn { pointer-events: auto; }

@media (min-width: 740px) {
  .top { padding-left: var(--pad-regular); padding-right: var(--pad-regular); }
  .pager { padding-left: var(--pad-regular); padding-right: var(--pad-regular); }
}
@media (min-width: 1200px) {
  .top { padding-left: var(--pad-wide); padding-right: var(--pad-wide); }
  .rail { display: flex; }
  .pager { display: none; }
}

/* ---------- chapters ---------- */
.chapter {
  position: relative;
  z-index: 10;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  pointer-events: none;
}
.chapter .btn,
.chapter a,
.chapter button,
.chapter video,
.cinema { pointer-events: auto; }

.safe {
  width: 100%;
  padding: 32px var(--pad-compact);
  padding-bottom: max(88px, calc(env(safe-area-inset-bottom) + 72px));
}
@media (min-width: 740px) {
  .safe { padding-left: var(--pad-regular); padding-right: var(--pad-regular); }
}
@media (min-width: 1200px) {
  .safe { padding-left: var(--pad-wide); padding-right: var(--pad-wide); }
}

.caption-band {
  max-width: 22rem;
  width: min(100%, 22rem);
  writing-mode: horizontal-tb;
}

.display {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(40px, 8vw, 88px);
  line-height: 1.08;
  letter-spacing: 0.08em;
  color: var(--foam);
  writing-mode: horizontal-tb;
  white-space: nowrap;
}
.display-sm { font-size: clamp(36px, 7vw, 72px); }

.title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.2;
  letter-spacing: 0.08em;
}

.lede {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--foam);
  max-width: 22em;
}
@media (min-width: 1200px) {
  .lede { font-size: 18px; }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  min-height: 44px;
  min-width: 44px;
  padding: 10px 20px;
  border-radius: 0;
  letter-spacing: 0.08em;
  transition: background-color var(--t-ui) var(--ease-out), color var(--t-ui) var(--ease-out), border-color var(--t-ui) var(--ease-out);
}
.btn.solid {
  border: 1px solid var(--foam);
  background: var(--foam);
  color: var(--ink-on-light);
}
.btn.solid:hover { background: var(--glacier); border-color: var(--glacier); }
.btn.ghost {
  border: 1px solid color-mix(in srgb, var(--ice) 45%, transparent);
  background: transparent;
  color: var(--foam);
}
.btn.ghost:hover { border-color: var(--ice); color: var(--ice); }

.enter-copy.is-hidden {
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
}
.enter-copy {
  transition: opacity var(--t-struct) var(--ease-out), transform var(--t-struct) var(--ease-out);
}
.enter-copy.is-in {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

/* ---------- films ---------- */
.chapter-films { justify-content: flex-start; }
.films-layout {
  padding-top: max(72px, calc(env(safe-area-inset-top) + 56px));
  padding-bottom: max(96px, calc(env(safe-area-inset-bottom) + 80px));
}
@media (min-width: 1200px) {
  .films-layout { padding-right: var(--pad-wide); max-width: none; }
}
.films-head { margin-bottom: 32px; max-width: 22em; }
.cinema {
  display: grid;
  gap: 24px;
}
.screen {
  position: relative;
  background: #000;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  max-height: min(62vh, 640px);
  margin-inline: auto;
  width: 100%;
}
.screen[data-ratio="9-16"] {
  aspect-ratio: 9 / 16;
  width: min(100%, calc(min(62vh, 640px) * 9 / 16));
}
.screen video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
  display: block;
}
.play-cue {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  border: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(5, 14, 20, 0.45) 100%);
  color: var(--foam);
}
.play-cue[hidden] { display: none; }
.play-mark {
  width: 64px;
  height: 64px;
  border: 1px solid var(--ice);
  border-radius: 50%;
  position: relative;
}
.play-mark::after {
  content: "";
  position: absolute;
  left: 26px;
  top: 20px;
  border-style: solid;
  border-width: 12px 0 12px 18px;
  border-color: transparent transparent transparent var(--foam);
}
.play-label {
  font-size: 13px;
  letter-spacing: 0.1em;
}

.reel {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.film-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  width: 100%;
  padding: 0 0 8px;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  text-align: left;
  color: var(--mist);
  min-height: 44px;
}
.film-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--bg-1);
}
.film-card.film-portrait img {
  object-position: center top;
}
.film-name {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--foam);
  letter-spacing: 0.06em;
  margin-top: 4px;
}
.film-meta {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}
.film-line {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.45;
}
.film-card.is-on {
  border-bottom-color: var(--ice);
}
.film-card.is-on .film-name,
.film-card:hover .film-name { color: var(--ice); }

@media (min-width: 740px) {
  .reel { grid-template-columns: repeat(4, 1fr); gap: 16px; }
}
@media (min-width: 1200px) {
  .cinema {
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.7fr);
    align-items: start;
    gap: 32px;
  }
  .reel { grid-template-columns: 1fr; }
  .film-card {
    grid-template-columns: 88px 1fr;
    column-gap: 12px;
    align-items: start;
    padding-bottom: 12px;
  }
  .film-card img {
    grid-row: 1 / 4;
    aspect-ratio: 16 / 10;
  }
  .film-card.film-portrait img { aspect-ratio: 9 / 12; }
}

/* ---------- facts (棚灰换气) ---------- */
.chapter-facts {
  background: var(--cove);
  color: var(--ink-on-light);
  justify-content: center;
  pointer-events: auto;
}
.chapter-facts .safe {
  width: 100%;
  max-width: none;
  padding-right: var(--pad-compact);
}
@media (min-width: 740px) {
  .chapter-facts .safe { padding-left: var(--pad-regular); padding-right: var(--pad-regular); }
}
@media (min-width: 1200px) {
  .chapter-facts .safe { padding-left: var(--pad-wide); padding-right: var(--pad-wide); }
}
.facts-layout {
  padding-top: 96px;
  padding-bottom: 96px;
  max-width: 1040px;
}
.facts-place {
  margin: 0 0 48px;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.25;
  letter-spacing: 0.06em;
}
.facts-place span {
  display: block;
  margin-top: 8px;
  font-family: var(--font-sans);
  font-size: 16px;
  letter-spacing: 0.04em;
  color: #3A4A52;
  white-space: nowrap;
}
.facts-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 32px;
}
.facts-list div { margin: 0; }
.facts-list dt {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: #3A4A52;
  margin-bottom: 4px;
}
.facts-list dd {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.facts-list .unit {
  font-family: var(--font-latin);
  font-size: 0.45em;
  letter-spacing: 0.08em;
  margin-left: 0.2em;
}
.facts-note {
  margin: 32px 0 0;
  font-size: 17px;
  line-height: 1.6;
  max-width: 22em;
}
@media (min-width: 740px) {
  .facts-list { grid-template-columns: repeat(3, 1fr); gap: 24px; }
}

/* ---------- lock ---------- */
.chapter-lock {
  justify-content: flex-end;
  min-height: 100svh;
  height: 100svh;
  overflow: hidden;
}
.lock-layout {
  padding-bottom: 8px;
  padding-top: 0;
  max-width: 20em;
}
.lock-cn {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 36px);
  letter-spacing: 0.18em;
}
.lock-mark {
  margin: 8px 0 0;
  font-family: var(--font-product);
  font-weight: 600;
  font-size: clamp(40px, 8vw, 64px);
  letter-spacing: 0.02em;
  line-height: 1;
  text-transform: uppercase;
}
.lock-mark sup {
  font-size: 0.35em;
  letter-spacing: 0;
  vertical-align: super;
}
.lock-en {
  margin: 12px 0 0;
  font-family: var(--font-editorial-latin);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}
.lock-line {
  margin: 24px 0 0;
  font-size: 16px;
  letter-spacing: 0.12em;
}
.lock-ip {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
  max-width: 20em;
}

.site-foot {
  pointer-events: auto;
  padding: 24px var(--pad-compact) max(24px, env(safe-area-inset-bottom));
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  align-items: baseline;
  color: var(--mist);
  font-size: 13px;
  letter-spacing: 0.06em;
}
.site-foot p { margin: 0; }
.foot-links { display: flex; gap: 16px; flex-wrap: wrap; }
.foot-links a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.foot-links a:hover { color: var(--ice); border-bottom-color: var(--ice); }
@media (min-width: 740px) {
  .site-foot { padding-left: var(--pad-regular); padding-right: var(--pad-regular); }
}
@media (min-width: 1200px) {
  .site-foot { padding-left: var(--pad-wide); padding-right: var(--pad-wide); }
}

/* ---------- loader ---------- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  background: var(--bg);
  transition: opacity var(--t-struct) var(--ease-in-out), visibility var(--t-struct);
}
.loader.is-gone {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loader-word {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 300;
  letter-spacing: 0.28em;
  font-size: 16px;
  color: var(--ice);
}
.loader-line {
  width: 96px;
  height: 1px;
  background: var(--bg-2);
  overflow: hidden;
  position: relative;
}
.loader-line::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 40%;
  background: var(--ice);
  animation: load-sweep 1.4s var(--ease-in-out) infinite;
}
@keyframes load-sweep {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(340%); }
}
@media (prefers-reduced-motion: reduce) {
  .loader-line::after { animation: none; width: 100%; }
  .enter-copy { transition-duration: 150ms; }
}

/* wide: typography sits in a left column, bottle has the rest */
@media (min-width: 1200px) {
  .chapter:not(.chapter-facts):not(.chapter-films) .safe {
    width: min(36rem, 42%);
    max-width: 42%;
    padding-right: 24px;
  }
}

/* compact: keep 3D visible in upper 55% */
@media (max-width: 739px) {
  .caption-band { max-width: 20em; width: auto; }
  .display { letter-spacing: 0.06em; white-space: normal; }
  .chapter:not(.chapter-facts):not(.chapter-films) .safe {
    padding-bottom: max(96px, calc(env(safe-area-inset-bottom) + 80px));
  }
}