/* Hallmark · macrostructure: Photographic · tone: cinematic-noir · anchor hue: 285
 * Hallmark · pre-emit critique: P5 H4 E5 S4 R5 V5
 * 页面样式。所有颜色 / 字体 / 间距 / 缓动都引用 tokens.css 的变量。
 */

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

html {
  background: var(--color-void);
  color: var(--color-paper);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-real, var(--nav-h)) + 1rem);
  scrollbar-color: var(--color-void-3) var(--color-void);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-void);
  overflow-x: clip;
  font-size: var(--text-body);
}

img { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4, p, ol, ul, figure, figcaption { margin: 0; padding: 0; }
ol, ul { list-style: none; }

a { color: inherit; text-decoration: none; }
a:active { color: var(--color-star-soft); }
h1, h2, h3, h4 { overflow-wrap: anywhere; min-width: 0; }

::selection { background: var(--color-star); color: var(--color-ink); }

:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 4px;
  border-radius: var(--radius-s);
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-silver-dim);
}

.skip {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 200;
  padding: var(--space-2xs) var(--space-sm);
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.12em;
  transform: translateY(-200%);
  transition: transform var(--dur-base) var(--ease-out);
}
.skip:focus-visible { transform: translateY(0); }

/* ═══ 阅读进度 ═════════════════════════════════════════════ */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  z-index: 85;
  pointer-events: none;
}
.progress span {
  display: block;
  height: 100%;
  background: linear-gradient(to right, var(--color-star), var(--color-star-soft));
  opacity: 0.45;
  transform: scaleX(0);
  transform-origin: left;
}

/* ═══ 胶片颗粒 ═════════════════════════════════════════════ */
.grain {
  position: fixed;
  inset: -60%;
  z-index: 70;
  pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-drift 9s steps(7) infinite;
}

/* ═══ 首屏不再做遮挡式入场：LCP 保持首帧 ═══════════════════ */

/* ═══ 准星光标 ═════════════════════════════════════════════ */
.reticle {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: var(--reticle-size);
  height: var(--reticle-size);
  margin: calc(var(--reticle-size) / -2) 0 0 calc(var(--reticle-size) / -2);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  will-change: transform;
}
.reticle.is-on { opacity: 1; }
.reticle__h,
.reticle__v {
  position: absolute;
  background: var(--color-paper);
  opacity: 0.7;
}
.reticle__h { top: 50%; left: 0; width: 100%; height: 1px; }
.reticle__v { left: 50%; top: 0; height: 100%; width: 1px; }
.reticle__ring {
  position: absolute;
  inset: 30%;
  border: 1px solid var(--color-star);
  border-radius: 50%;
  transition: inset var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}
.reticle__label {
  position: absolute;
  left: 100%;
  top: calc(50% + 12px);
  margin-left: var(--space-2xs);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--color-star-soft);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.reticle.is-lock {
  width: var(--reticle-size-lock);
  height: var(--reticle-size-lock);
  margin: calc(var(--reticle-size-lock) / -2) 0 0 calc(var(--reticle-size-lock) / -2);
}
.reticle.is-lock .reticle__ring { inset: 12%; border-color: var(--color-star); }
.reticle.is-lock .reticle__label { opacity: 1; }

.media-hit { cursor: none; }

.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;
}

/* ═══ 导航 ═════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: var(--nav-h);
  padding: 0 var(--gutter);
  transition: background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: color-mix(in oklch, var(--color-void) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.1);
  border-bottom-color: var(--color-rule);
}
.nav__brand {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2xs);
  min-width: 0;
}
.nav__mark {
  width: 1.05rem;
  height: 1.05rem;
  color: var(--color-star);
  align-self: center;
  flex: none;
  transition: transform var(--dur-cine) var(--ease-out);
}
.nav__brand:hover .nav__mark { transform: rotate(90deg); }
.nav__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--color-paper);
}
.nav__latin {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.26em;
  color: var(--color-silver-dim);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-sm), 2vw, var(--space-lg));
}
.nav__links a {
  position: relative;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-paper-dim);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-block: var(--space-3xs);
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--color-star);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav__links a:hover { color: var(--color-paper); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__place {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.2em;
  color: var(--color-silver-dim);
  white-space: nowrap;
}
.nav__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-star);
  box-shadow: 0 0 10px var(--color-star);
}

/* ═══ 章节轨 ═══════════════════════════════════════════════ */
.rail {
  position: fixed;
  left: var(--rail-x);
  top: 50%;
  transform: translateY(-50%);
  z-index: 55;
  display: none;
}
.rail__list { display: grid; gap: 0; }
.rail__list a {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  padding-block: var(--space-3xs);
  color: var(--color-silver-dim);
  transition: color var(--dur-base) var(--ease-out);
}
.rail__num {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
}
.rail__tick {
  width: 16px;
  height: 1px;
  background: var(--color-rule);
  transform-origin: left center;
  transition: transform var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
.rail__label {
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--color-silver);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.rail__list a:hover,
.rail__list a.is-current { color: var(--color-paper); }
.rail__list a.is-current .rail__tick { transform: scaleX(1.875); background: var(--color-star); }
.rail__list a:hover .rail__label { opacity: 1; transform: none; }

/* ═══ HERO ═════════════════════════════════════════════════ */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100svh;
  padding: calc(var(--nav-real, var(--nav-h)) + var(--space-sm)) var(--gutter)
           clamp(var(--space-3xl), 14vh, var(--space-4xl));
  overflow: clip;
}
.hero__media,
.hero__scrim {
  position: absolute;
  inset: 0;
}
.hero__media { z-index: 0; overflow: hidden; }
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 50%;
  transform: translate3d(0, var(--hero-shift, 0px), 0) scale(1.04);
  will-change: transform;
}
.hero__dust {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
  mix-blend-mode: screen;
}
.hero__scrim {
  z-index: 1;
  background:
    linear-gradient(92deg, var(--color-void) 0%, var(--color-void) 6%,
      var(--color-scrim-strong) 22%, var(--color-scrim-mid) 44%, transparent 70%),
    linear-gradient(to top, var(--color-void) 0%, var(--color-void) 4%, transparent 40%),
    linear-gradient(to bottom, var(--color-scrim-soft) 0%, transparent 20%);
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: min(56rem, 76vw);
  display: grid;
  gap: var(--space-xs);
}
.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2xs);
  color: var(--color-silver);
}
.hero__eyebrow::before {
  content: "";
  width: 2.5rem;
  height: 1px;
  background: var(--color-star);
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--text-hero);
  line-height: 0.95;
  letter-spacing: 0.015em;
  color: var(--color-paper);
  text-shadow: 0 0.06em 0.6em color-mix(in oklch, var(--color-void) 70%, transparent);
  overflow-wrap: anywhere;
  min-width: 0;
}
.hero__title span { display: inline; }
.hero__latin {
  font-family: var(--font-mono);
  font-size: clamp(0.62rem, 0.9vw, 0.78rem);
  letter-spacing: 0.52em;
  color: var(--color-silver);
  margin-top: calc(var(--space-2xs) * -1);
}
.hero__lead {
  max-width: 28ch;
  text-wrap: balance;
  margin-top: var(--space-2xs);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-lead);
  line-height: 1.6;
  color: var(--color-paper);
}
.hero__desc {
  max-width: 40ch;
  color: var(--color-silver);
  font-size: var(--text-body);
  line-height: 1.85;
}
.hero__foot {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-rule);
}
.hero__scroll {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  color: var(--color-silver);
  transition: color var(--dur-fast) var(--ease-out);
}
.hero__scroll:hover { color: var(--color-paper); }
.hero__scroll-line {
  position: relative;
  width: 3.5rem;
  height: 1px;
  background: var(--color-rule-strong);
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-star);
  transform: translateX(-100%);
  animation: line-sweep 2.6s var(--ease-in-out) infinite;
}

/* ═══ 通用节头 ═════════════════════════════════════════════ */
.sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-md);
  padding-bottom: var(--space-xl);
  margin-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-rule);
}
.sec-head__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-h2);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--color-paper);
  overflow-wrap: anywhere;
  min-width: 0;
}
.sec-head__lead {
  max-width: 38ch;
  color: var(--color-silver);
  font-size: var(--text-body);
  line-height: 1.8;
}

/* ═══ 业务 ═════════════════════════════════════════════════ */
.work,
.process,
.toolchain,
.collab {
  padding: var(--space-3xl) var(--gutter);
  max-width: var(--maxw);
  margin-inline: auto;
}
.work__list { display: grid; gap: clamp(var(--space-2xl), 11vh, var(--space-3xl)); }

.work__item {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-lg);
  align-items: center;
}
.work__frame { grid-column: 1 / span 8; }
.work__body { grid-column: 9 / span 4; }
.work__item[data-dir="right"] .work__frame { grid-column: 5 / span 8; order: 2; }
.work__item[data-dir="right"] .work__body { grid-column: 1 / span 4; order: 1; }

.frame {
  position: relative;
  overflow: hidden;
  background: var(--color-void-2);
  border: 1px solid var(--color-rule);
  aspect-ratio: 3 / 2;
}
.frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.04) translate3d(0, var(--frame-shift, 0px), 0);
  will-change: transform;
  transition: transform var(--dur-cine) var(--ease-out);
}
.frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to top, color-mix(in oklch, var(--color-void) 62%, transparent) 0%, transparent 46%);
}
.frame__cap {
  position: absolute;
  left: var(--space-sm);
  bottom: var(--space-sm);
  z-index: 2;
  color: var(--color-silver);
}
.frame__cap::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 0.6em;
  vertical-align: middle;
  background: var(--color-star-soft);
  transform: rotate(45deg) translateY(-1px);
}
.work__num { color: var(--color-star-soft); }
.work__title {
  margin-top: var(--space-2xs);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-h3);
  line-height: 1.2;
  letter-spacing: 0.02em;
}
.work__text {
  margin-top: var(--space-sm);
  color: var(--color-paper-dim);
  font-size: var(--text-body);
  line-height: 1.85;
}
.work__meta {
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-rule);
  color: var(--color-silver-dim);
}

/* ═══ 工序 ═════════════════════════════════════════════════ */
.process__steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-lg);
}
.process__steps::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, var(--color-star), var(--color-rule) 55%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1400ms var(--ease-out);
}
.process__steps.is-in::before { transform: scaleX(1); }
.step {
  position: relative;
  padding-top: var(--space-md);
  display: grid;
  align-content: start;
  gap: var(--space-2xs);
  border-top: none;
}
.step::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-void);
  box-shadow: 0 0 0 1px var(--color-rule-strong);
  transition: background var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.step.is-in::before { background: var(--color-star); box-shadow: 0 0 0 1px var(--color-star), 0 0 18px var(--color-star); }
.step__num { color: var(--color-star-soft); }
.step__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-h4);
  letter-spacing: 0.04em;
}
.step__text {
  color: var(--color-silver);
  font-size: var(--text-sm);
  line-height: 1.85;
}
.step__out {
  margin-top: var(--space-2xs);
  padding-top: var(--space-2xs);
  border-top: 1px solid var(--color-rule);
  color: var(--color-silver-dim);
  font-size: 0.62rem;
  line-height: 1.7;
}

/* ═══ 制作台 ═══════════════════════════════════════════════ */
.toolchain { display: grid; gap: var(--space-2xl); }
.toolchain__still {
  aspect-ratio: 21 / 9;
  max-height: 62vh;
}
.toolchain__grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-lg);
  align-items: start;
}
.toolchain__intro { grid-column: 1 / span 5; display: grid; gap: var(--space-md); }
.toolchain__lead {
  color: var(--color-silver);
  font-size: var(--text-body);
  line-height: 1.9;
  max-width: 36ch;
}
.principles { display: grid; gap: var(--space-sm); margin-top: var(--space-2xs); }
.principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-sm);
  align-items: baseline;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-rule);
}
.principle .mono { color: var(--color-star-soft); }
.principle p { color: var(--color-paper-dim); font-size: var(--text-sm); line-height: 1.8; }

.toolchain__layers { grid-column: 7 / span 6; display: grid; }
.layer {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: var(--space-md);
  align-items: baseline;
  padding: var(--space-md) var(--space-sm);
  border-top: 1px solid var(--color-rule);
  transition: background var(--dur-base) var(--ease-out);
}
.layer:last-child { border-bottom: 1px solid var(--color-rule); }
.layer:hover { background: color-mix(in oklch, var(--color-star) 7%, transparent); }
.layer__name { color: var(--color-paper); font-size: var(--text-mono-lg); letter-spacing: 0.3em; }
.layer__desc { color: var(--color-silver); font-size: var(--text-sm); }

/* ═══ 概念影像（横向片轨）══════════════════════════════════ */
.reel { padding: 0; }
.reel .sec-head {
  margin: 0;
  padding: var(--space-3xl) var(--gutter) var(--space-xl);
  border-bottom: none;
}
.reel__stage {
  position: relative;
  height: 340vh;
}
.reel__sticky {
  position: sticky;
  top: var(--nav-real, var(--nav-h));
  display: flex;
  align-items: center;
  height: calc(100svh - var(--nav-real, var(--nav-h)));
  overflow: hidden;
}
.reel__track {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-sm), 2vw, var(--space-lg));
  height: 100%;
  padding-inline: var(--gutter);
  will-change: transform;
}
.reel__edge {
  position: absolute;
  top: 0;
  bottom: 0;
  width: min(9vw, 120px);
  z-index: 3;
  pointer-events: none;
}
.reel__edge--left { left: 0; background: linear-gradient(to right, var(--color-void) 12%, transparent); }
.reel__edge--right { right: 0; background: linear-gradient(to left, var(--color-void) 12%, transparent); }
.shot {
  position: relative;
  flex: 0 0 auto;
  width: min(62vw, 980px);
  display: grid;
  gap: var(--space-sm);
}
.shot__img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  background: var(--color-void-2);
  border: 1px solid var(--color-rule);
  transition: transform var(--dur-cine) var(--ease-out), filter var(--dur-cine) var(--ease-out);
  filter: saturate(0.9) contrast(1.02);
}
.shot:hover .shot__img { filter: saturate(1.02) contrast(1.04); }
.js .shot { opacity: 0.4; transition: opacity 800ms var(--ease-out); }
.js .shot.is-focus { opacity: 1; }

.reel__hint {
  display: none;
  padding: 0 var(--gutter) var(--space-sm);
  color: var(--color-silver-dim);
}
.shot__cap {
  display: grid;
  gap: var(--space-3xs);
  padding-top: var(--space-2xs);
  border-top: 1px solid var(--color-rule);
}
.shot__title { color: var(--color-paper); font-size: var(--text-mono-lg); letter-spacing: 0.24em; }

/* ═══ 合作 ═════════════════════════════════════════════════ */
.collab__list { display: grid; }
.mode {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1.15fr) minmax(0, 1.35fr) minmax(0, 0.85fr);
  gap: var(--space-md);
  align-items: baseline;
  padding: var(--space-lg) var(--space-sm);
  border-top: 1px solid var(--color-rule);
  transition: background var(--dur-base) var(--ease-out);
}
.mode:first-child { border-top: 0; }
.mode:last-child { border-bottom: 1px solid var(--color-rule); }
.mode:hover { background: color-mix(in oklch, var(--color-star) 6%, transparent); }
.mode__num { color: var(--color-star-soft); }
.mode__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-h4);
  letter-spacing: 0.03em;
}
.mode__text { color: var(--color-silver); font-size: var(--text-sm); line-height: 1.85; }
.mode__tag { color: var(--color-silver-dim); text-align: right; }

/* ═══ 终章 ═════════════════════════════════════════════════ */
.closing {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 92svh;
  padding: var(--space-3xl) var(--gutter);
  overflow: clip;
  border-top: 1px solid var(--color-rule);
}
.closing__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: 0.72;
}
.closing__scrim {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 60%, transparent 0%, color-mix(in oklch, var(--color-void) 55%, transparent) 70%),
    linear-gradient(to bottom, var(--color-void) 0%, transparent 26%, transparent 70%, var(--color-void) 100%);
}
.closing__inner {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: var(--space-sm);
  text-align: center;
}
.closing__eyebrow { color: var(--color-silver); }
.closing__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 7.4vw, 6.4rem);
  line-height: 1.06;
  letter-spacing: 0.04em;
  color: var(--color-paper);
  overflow-wrap: anywhere;
  min-width: 0;
}
.closing__latin {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.34em;
  color: var(--color-silver-dim);
}

/* ═══ 页脚 ═════════════════════════════════════════════════ */
.footer {
  padding: var(--space-xl) var(--gutter) var(--space-lg);
  border-top: 1px solid var(--color-rule);
  background: var(--color-void);
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto;
  gap: var(--space-lg);
  align-items: baseline;
  padding-bottom: var(--space-lg);
}
.footer__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-h4);
  letter-spacing: 0.04em;
  color: var(--color-paper);
}
.footer__desc { color: var(--color-silver); font-size: var(--text-sm); letter-spacing: 0.08em; }
.footer__icp a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding-block: var(--space-3xs);
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.08em;
  color: var(--color-silver-dim);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.footer__icp a:hover { color: var(--color-paper); border-bottom-color: var(--color-star); }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-rule);
}
.footer__bottom .mono { color: var(--color-silver-dim); }
.footer__top-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding-block: var(--space-3xs);
  color: var(--color-silver);
  transition: color var(--dur-fast) var(--ease-out);
}
.footer__top-link:hover { color: var(--color-star-soft); }

/* ═══ 揭示动效（仅 js 下隐藏，保证 no-js 可读）═══════════ */
.js .reveal {
  opacity: 0;
  transform: translate3d(0, 26px, 0);
  transition: opacity var(--dur-cine) var(--ease-out),
              transform var(--dur-cine) var(--ease-out);
}
.js .reveal.is-in { opacity: 1; transform: none; }

.js .figure-reveal .frame__img,
.js .figure-reveal .shot__img {
  clip-path: inset(0 0 100% 0);
  transform: scale(1.12);
  transition: clip-path 1100ms var(--ease-out), transform 1700ms var(--ease-out),
              filter var(--dur-cine) var(--ease-out);
}
.js .figure-reveal.is-in .frame__img,
.js .figure-reveal.is-in .shot__img {
  clip-path: inset(0 0 0 0);
  transform: scale(1.04);
}
.js .figure-reveal .frame__cap,
.js .figure-reveal .shot__cap { opacity: 0; transition: opacity 700ms var(--ease-out) 320ms; }
.js .figure-reveal.is-in .frame__cap,
.js .figure-reveal.is-in .shot__cap { opacity: 1; }

/* ═══ 响应式 ═══════════════════════════════════════════════ */
@media (min-width: 901px) {
  .hero__title {
    display: grid;
    font-size: clamp(4rem, min(11.5vw, 18vh), 13rem);
    line-height: 0.9;
  }
  .hero__title span { display: block; }
}

@media (min-width: 1240px) {
  .rail { display: block; }
  /* 章节轨单独占一列，正文让位，避免 06 合作 压到正文 */
  .work,
  .process,
  .toolchain,
  .collab { padding-left: calc(var(--gutter) + var(--rail-indent)); }
  .reel .sec-head { padding-left: calc(var(--gutter) + var(--rail-indent)); }
  .hero__inner,
  .hero__foot { margin-left: var(--rail-indent); }
}

@media (max-width: 1100px) {
  .work__frame { grid-column: 1 / span 7; }
  .work__body { grid-column: 8 / span 5; }
  .work__item[data-dir="right"] .work__frame { grid-column: 6 / span 7; }
  .work__item[data-dir="right"] .work__body { grid-column: 1 / span 5; }
  .toolchain__intro { grid-column: 1 / span 6; }
  .toolchain__layers { grid-column: 7 / span 6; }
}

@media (max-width: 900px) {
  .nav__place { display: none; }
  .hero__img { object-position: 68% 36%; }
  .hero__scrim {
    background:
      linear-gradient(to top, var(--color-void) 0%, var(--color-void) 16%,
        var(--color-scrim-strong) 44%, var(--color-scrim-heavy) 68%, transparent 92%),
      linear-gradient(to bottom, var(--color-scrim-mid) 0%, transparent 20%);
  }
  .hero__title { font-size: clamp(3.4rem, 16.5vw, 8rem); }
  .hero__inner { max-width: none; }
  .hero__title { font-size: clamp(3rem, 17vw, 8rem); }
  .hero__desc { max-width: 44ch; }

  .work__item,
  .work__item[data-dir="right"] {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-md);
  }
  .work__frame,
  .work__body,
  .work__item[data-dir="right"] .work__frame,
  .work__item[data-dir="right"] .work__body { grid-column: 1 / -1; order: initial; }

  .process__steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .toolchain__grid { grid-template-columns: minmax(0, 1fr); }
  .toolchain__intro,
  .toolchain__layers { grid-column: 1 / -1; }
  .toolchain__still { aspect-ratio: 16 / 9; }

  .reel__hint { display: block; padding-top: var(--space-sm); }
  .reel__stage { height: auto; }
  .reel__sticky { position: static; height: auto; overflow: visible; display: block; }
  .reel__edge { display: none; }
  .reel__track {
    position: static;
    height: auto;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    padding-block: var(--space-md) var(--space-2xl);
    scrollbar-width: none;
  }
  .reel__track::-webkit-scrollbar { display: none; }
  .shot { width: min(84vw, 560px); scroll-snap-align: center; }
  .js .shot { opacity: 1; }
  .js .figure-reveal.is-in .shot__cap { opacity: 1; }

  .mode { grid-template-columns: 2.4rem minmax(0, 1fr); row-gap: var(--space-2xs); }
  .mode__text { grid-column: 2; }
  .mode__tag { grid-column: 2; text-align: left; }

  .footer__top { grid-template-columns: minmax(0, 1fr); gap: var(--space-2xs); }
}

@media (max-width: 720px) {
  .nav { height: auto; padding-block: var(--space-xs); flex-wrap: wrap; row-gap: var(--space-2xs); }
  .nav__latin { display: none; }
  .nav__links { gap: var(--space-md); }
  .nav__links a { font-size: 0.82rem; letter-spacing: 0.08em; }
  .hero {
    padding-top: calc(var(--nav-real, var(--nav-h)) + var(--space-2xs));
    padding-bottom: clamp(var(--space-3xl), 18vh, var(--space-4xl));
  }
  .hero__foot { flex-direction: column; align-items: flex-start; gap: var(--space-2xs); }
  .closing__latin { letter-spacing: 0.2em; }
}

@media (max-width: 560px) {
  .sec-head { padding-bottom: var(--space-lg); margin-bottom: var(--space-xl); }
  .sec-head__lead { font-size: var(--text-sm); }
  .process__steps { grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
  .process__steps::before { display: none; }
  .step::before { display: none; }
  .process__steps > .step:first-child { border-top: 0; }
  .step { border-top: 1px solid var(--color-rule); padding-top: var(--space-md); }
  .layer { grid-template-columns: minmax(0, 1fr); gap: var(--space-3xs); padding-inline: 0; }
  .layer:hover { padding-left: var(--space-2xs); }
  .work, .process, .toolchain, .collab { padding-block: var(--space-2xl); }
  .shot { width: 88vw; }
  .shot__cap { flex-direction: column; gap: var(--space-3xs); }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ═══ 动效降级 ═════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grain { animation: none; }
  .reticle { display: none; }
  .media-hit { cursor: auto; }
  .hero__img,
  .frame__img,
  .shot__img { transform: none !important; transition: none; }
  .nav__mark,
  .nav__mark:hover { transition: none; transform: none; }
  .nav__links a::after { transition: none; }
  .footer__icp a,
  .footer__top-link { transition: none; }
  .hero__scroll-line::after { animation: none; }
  .js .reveal,
  .js .reveal.is-in { opacity: 1; transform: none; transition: none; }
  .js .figure-reveal .frame__img,
  .js .figure-reveal .shot__img,
  .js .figure-reveal.is-in .frame__img,
  .js .figure-reveal.is-in .shot__img {
    clip-path: none;
    transform: none;
    transition: none;
  }
  .js .figure-reveal .frame__cap,
  .js .figure-reveal .shot__cap { opacity: 1; transition: none; }
  .js .shot { opacity: 1; }
  .process__steps::before { transform: scaleX(1); transition: none; }

  /* 片轨降级：静态横向滚动，保证 5 帧都能看到（不等于隐藏） */
  .reel__stage { height: auto; }
  .reel__sticky { position: static; height: auto; overflow: visible; display: block; }
  .reel__edge { display: none; }
  .reel__track {
    overflow-x: auto;
    padding-block: var(--space-md) var(--space-2xl);
    scrollbar-width: none;
  }
  .reel__track::-webkit-scrollbar { display: none; }
}

/* ═══ 无 JS 降级 ═══════════════════════════════════════════ */
.no-js .reel__stage { height: auto; }
.no-js .reel__sticky { position: static; height: auto; overflow: visible; display: block; }
.no-js .reel__edge { display: none; }
.no-js .reel__track {
  overflow-x: auto;
  padding-block: var(--space-md) var(--space-2xl);
  scrollbar-width: none;
}
.no-js .reel__track::-webkit-scrollbar { display: none; }

/* ═══ 关键帧 ═══════════════════════════════════════════════ */
@keyframes grain-drift {
  0%   { transform: translate3d(0, 0, 0); }
  20%  { transform: translate3d(-3%, 2%, 0); }
  40%  { transform: translate3d(2%, -3%, 0); }
  60%  { transform: translate3d(-2%, -2%, 0); }
  80%  { transform: translate3d(3%, 1%, 0); }
  100% { transform: translate3d(0, 0, 0); }
}

@keyframes line-sweep {
  0%   { transform: translateX(-100%); }
  55%  { transform: translateX(0); }
  100% { transform: translateX(100%); }
}