:root {
  --canvas: #050708;
  --surface: #0a0d11;
  --surface-soft: #10151b;
  --ink: #edf0ed;
  --muted: #aab0b4;
  --dim: #858e94;
  --line: rgba(237, 240, 237, 0.14);
  --accent: #b49163;
  --indigo: #232847;
  --display: "Syne", "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --mono: "DM Mono", Consolas, monospace;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --gutter: clamp(18px, 4vw, 72px);
  --max: 1760px;
}

* { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; background: var(--canvas); }
body { margin: 0; min-width: 320px; overflow-x: clip; color: var(--ink); background: var(--canvas); font-family: var(--sans); }
body.viewer-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img, video { display: block; max-width: 100%; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.shell { width: min(var(--max), calc(100% - (var(--gutter) * 2))); margin-inline: auto; }
.mono { font-family: var(--mono); letter-spacing: .09em; text-transform: uppercase; }

.topbar {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
  left: 50%;
  z-index: 40;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(1080px, calc(100% - 32px));
  min-height: 58px;
  padding: 7px 9px 7px 18px;
  border: 1px solid rgba(237, 240, 237, .16);
  border-radius: 999px;
  background: rgba(5, 8, 11, .84);
  box-shadow: 0 18px 60px rgba(0, 0, 0, .3);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
}

.brand { display: inline-flex; align-items: center; gap: 10px; width: max-content; font-family: var(--display); font-size: 12px; font-weight: 600; }
.brand img { width: 27px; height: 27px; padding: 6px; border: 1px solid var(--line); border-radius: 50%; }
.topnav { display: flex; align-items: center; gap: clamp(14px, 2vw, 28px); }
.topnav a { color: var(--muted); font-size: 11px; transition: color .25s ease; }
.topnav a:hover, .topnav a.is-active { color: var(--ink); }
.return-link { justify-self: end; min-height: 44px; display: inline-flex; align-items: center; padding: 0 17px; border-radius: 999px; color: #0b0d0e; background: var(--ink); font-size: 11px; font-weight: 600; }

.hero { position: relative; min-height: 100svh; display: flex; align-items: end; overflow: hidden; isolation: isolate; }
.hero-media { position: absolute; inset: 0; z-index: -2; background: #07090c url("cover.webp") center / cover no-repeat; }
.hero-media video { width: 100%; height: 100%; object-fit: cover; filter: saturate(.84) contrast(1.04); transform: scale(1.012); }
.hero::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(3, 5, 8, .18), rgba(3, 5, 8, .18) 42%, rgba(3, 5, 8, .96)),
    linear-gradient(90deg, rgba(3, 5, 8, .72), transparent 62%);
  content: "";
}
.hero-grid { width: 100%; padding-block: clamp(150px, 18vh, 220px) clamp(54px, 8vh, 96px); display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(320px, .82fr); align-items: end; gap: clamp(36px, 8vw, 140px); }
.hero h1 { margin: 0; max-width: 9ch; font-family: var(--display); font-size: clamp(58px, 8.5vw, 140px); font-weight: 600; line-height: .88; letter-spacing: -.04em; text-wrap: balance; }
.hero h1 span { display: block; margin-top: 22px; color: rgba(237, 240, 237, .72); font: 400 clamp(11px, 1.1vw, 16px) / 1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.hero-summary { max-width: 580px; padding-bottom: 10px; }
.hero-summary > p { margin: 0 0 30px; color: #d4d8d7; font-size: clamp(15px, 1.2vw, 19px); line-height: 1.9; }
.facts { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.fact { padding: 16px 0; border-bottom: 1px solid var(--line); }
.fact:nth-child(odd) { padding-right: 18px; }
.fact:nth-child(even) { padding-left: 18px; border-left: 1px solid var(--line); }
.fact small { display: block; margin-bottom: 7px; color: var(--dim); font: 9px var(--mono); text-transform: uppercase; }
.fact strong { font-size: 12px; font-weight: 500; }
.motion-toggle { position: absolute; right: var(--gutter); bottom: max(22px, env(safe-area-inset-bottom)); z-index: 3; min-height: 44px; padding: 0 16px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); background: rgba(5, 8, 11, .82); font: 10px var(--mono); letter-spacing: .06em; cursor: pointer; backdrop-filter: blur(12px); }

section { position: relative; padding-block: clamp(90px, 12vw, 180px); }
.section-head { display: grid; grid-template-columns: minmax(180px, .48fr) minmax(0, 1.52fr); gap: clamp(30px, 8vw, 130px); align-items: end; padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.section-label { color: #c7ad87; font: 10px var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.section-head h2 { margin: 0; max-width: 1050px; font-family: var(--display); font-size: clamp(38px, 6vw, 92px); line-height: .98; letter-spacing: -.04em; text-wrap: balance; }
.section-intro { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; margin-top: 24px; }
.section-intro p { margin: 0; color: var(--muted); line-height: 1.85; }
.section-intro .signal { color: #c7ad87; font: 10px var(--mono); letter-spacing: .08em; text-transform: uppercase; }

.film-frame { margin-top: 46px; padding: 8px; border-radius: 24px; background: var(--surface); box-shadow: 0 40px 120px rgba(0, 0, 0, .38); }
.film-frame video, .film-frame iframe { width: 100%; aspect-ratio: 16 / 9; border-radius: 17px; background: #000; border: 0; display: block; }
.film-meta { display: flex; justify-content: space-between; gap: 20px; padding: 16px 10px 8px; color: var(--dim); font-size: 9px; }

.system-field { overflow: hidden; border-block: 1px solid rgba(237, 240, 237, .08); background: linear-gradient(180deg, #080b0f, #0c1016 52%, #07090c); }
.system-statement { margin: clamp(62px, 8vw, 110px) 0 0; max-width: 16ch; color: rgba(237, 240, 237, .92); font-family: var(--display); font-size: clamp(38px, 6.4vw, 102px); font-weight: 600; line-height: .94; letter-spacing: -.04em; }
.system-statement span { color: #b49163; }
.pipeline { margin-top: clamp(68px, 9vw, 128px); border-bottom: 1px solid var(--line); }
.pipeline-row { display: grid; grid-template-columns: 90px minmax(200px, .62fr) minmax(0, 1.38fr); gap: clamp(24px, 5vw, 76px); align-items: start; padding: clamp(30px, 4vw, 56px) 0; border-top: 1px solid var(--line); }
.pipeline-index { color: #c7ad87; font: 10px var(--mono); letter-spacing: .09em; }
.pipeline-row h3 { margin: 0; font-family: var(--display); font-size: clamp(27px, 3.4vw, 52px); line-height: 1; letter-spacing: -.04em; }
.pipeline-copy p { margin: 0; max-width: 70ch; color: var(--muted); font-size: 14px; line-height: 1.9; }
.pipeline-output { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.pipeline-output span { min-height: 34px; display: inline-flex; align-items: center; padding: 0 12px; border: 1px solid var(--line); border-radius: 999px; color: #cfd4d3; font: 9px var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.tool-line { margin-top: 46px; display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
.tool-line div { min-height: 128px; display: flex; flex-direction: column; justify-content: space-between; padding: 22px; border-right: 1px solid var(--line); }
.tool-line div:last-child { border-right: 0; }
.tool-line small { color: var(--dim); font: 9px var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.tool-line strong { font-family: var(--display); font-size: clamp(17px, 1.8vw, 24px); font-weight: 500; }

.character-field { background: #080b0f; color: var(--ink); }
.character-field .section-head { border-color: var(--line); }
.character-field .section-label { color: #c7ad87; }
.character-field .section-intro p { color: var(--muted); }
.character-field .signal { color: #c7ad87; }
.character-grid { display: grid; grid-template-columns: minmax(280px, .72fr) minmax(0, 1.28fr); gap: clamp(16px, 2vw, 30px); margin-top: 54px; align-items: stretch; }
.character-card { position: relative; overflow: hidden; margin: 0; min-height: 660px; border-radius: 16px; background: #10141d; }
.character-card:last-child { background: #10141d; }
.character-card button { display: block; width: 100%; height: 100%; padding: 0; border: 0; background: transparent; cursor: zoom-in; }
.character-card img { width: 100%; height: 100%; min-height: 660px; object-fit: cover; transition: transform 700ms var(--ease); }
.character-card:last-child img { object-fit: contain; }
.character-card:hover img { transform: scale(1.012); }
.character-card figcaption { position: absolute; right: 14px; bottom: 14px; left: 14px; display: flex; justify-content: space-between; padding: 10px 12px; border-radius: 10px; background: rgba(5, 7, 8, .78); color: rgba(237, 240, 237, .9); font: 9px var(--mono); letter-spacing: .06em; text-transform: uppercase; pointer-events: none; }

.archive-head { margin-bottom: 54px; }
.chapter { padding-block: clamp(70px, 9vw, 130px); border-top: 1px solid var(--line); }
.chapter:first-child { border-top: 0; }
.chapter-head { display: grid; grid-template-columns: 110px minmax(0, 1fr) minmax(260px, 460px); gap: 26px; align-items: start; margin-bottom: 34px; }
.chapter-no { color: #c7ad87; font: 10px var(--mono); letter-spacing: .09em; }
.chapter h3 { margin: 0; font-family: var(--display); font-size: clamp(34px, 4.8vw, 72px); line-height: 1; letter-spacing: -.04em; }
.chapter-copy { margin: 4px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.accordion-hint { display: block; margin-top: 15px; color: var(--dim); font: 9px / 1.5 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.story { display: grid; gap: clamp(28px, 4vw, 58px); }
.sequence { min-width: 0; }
.frame-group { display: flex; gap: clamp(5px, .55vw, 9px); height: clamp(390px, 42vw, 610px); overflow: hidden; }
.frame { position: relative; flex: 1 1 0; min-width: 58px; overflow: hidden; margin: 0; border-radius: 14px; background: var(--surface-soft); box-shadow: 0 24px 80px rgba(0, 0, 0, .26); transition: flex-grow 620ms var(--ease); }
.frame.is-active { flex-grow: 7; }
.frame-button { position: relative; display: block; width: 100%; height: 100%; padding: 0; border: 0; background: transparent; cursor: pointer; }
.frame img { width: 100%; height: 100%; object-fit: cover; filter: brightness(.52) saturate(.7); transition: transform 620ms var(--ease), filter 420ms var(--ease); }
.frame.is-active img { filter: brightness(1) saturate(1); }
.frame.is-active .frame-button { cursor: zoom-in; }
.frame figcaption { position: absolute; right: 14px; bottom: 14px; left: 14px; display: flex; justify-content: space-between; gap: 16px; padding: 10px 12px; border-radius: 10px; color: rgba(237, 240, 237, .86); background: rgba(5, 7, 8, .74); font: 9px var(--mono); letter-spacing: .06em; text-transform: uppercase; opacity: 0; transform: translateY(6px); transition: opacity 240ms var(--ease), transform 300ms var(--ease); pointer-events: none; }
.frame-button:hover img { filter: brightness(.82) saturate(.88); transform: scale(1.014); }
.frame.is-active .frame-button:hover img { filter: brightness(1.04) saturate(1); }
.frame.is-active figcaption { opacity: 1; transform: translateY(0); }
.sequence-note { margin: 14px 0 0; color: var(--dim); font: 9px / 1.6 var(--mono); letter-spacing: .06em; text-transform: uppercase; }

.closing { padding-top: 40px; padding-bottom: max(70px, env(safe-area-inset-bottom)); }
.closing-row { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-top: 28px; border-top: 1px solid var(--line); }
.closing-row p { margin: 0; color: var(--muted); font-size: 12px; }
.back-button { min-height: 44px; display: inline-flex; align-items: center; padding: 0 20px; border-radius: 999px; color: #0b0d0e; background: var(--ink); font-size: 12px; font-weight: 600; }

dialog { width: 100vw; max-width: none; height: 100dvh; max-height: none; margin: 0; padding: 0; border: 0; background: rgba(2, 3, 4, .96); color: var(--ink); }
dialog::backdrop { background: rgba(2, 3, 4, .94); }
.viewer-stage { position: relative; width: 100%; height: 100%; display: grid; place-items: center; padding: max(74px, env(safe-area-inset-top)) clamp(18px, 5vw, 80px) max(64px, env(safe-area-inset-bottom)); }
.viewer-stage img { width: 100%; height: 100%; object-fit: contain; }
.viewer-close, .viewer-arrow { position: fixed; z-index: 2; display: grid; place-items: center; border: 1px solid var(--line); color: var(--ink); background: rgba(8, 11, 12, .86); backdrop-filter: blur(14px); cursor: pointer; }
.viewer-close { top: max(18px, env(safe-area-inset-top)); right: max(18px, env(safe-area-inset-right)); width: 46px; height: 46px; border-radius: 50%; }
.viewer-arrow { top: 50%; width: 44px; height: 64px; border-radius: 999px; transform: translateY(-50%); }
.viewer-prev { left: max(16px, env(safe-area-inset-left)); }
.viewer-next { right: max(16px, env(safe-area-inset-right)); }
.viewer-caption { position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom)); color: var(--muted); font: 9px var(--mono); letter-spacing: .08em; transform: translateX(-50%); }

@media (max-width: 900px) {
  .topbar { grid-template-columns: 1fr auto; }
  .topnav { display: none; }
  .hero-grid, .section-head, .section-intro { grid-template-columns: 1fr; }
  .hero-grid { gap: 32px; }
  .hero-summary { max-width: 650px; }
  .pipeline-row { grid-template-columns: 64px minmax(180px, .7fr) minmax(0, 1.3fr); }
  .tool-line { grid-template-columns: repeat(2, 1fr); }
  .tool-line div:nth-child(2) { border-right: 0; }
  .tool-line div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .character-grid { grid-template-columns: 1fr; }
  .character-card { min-height: 520px; }
  .character-card img { min-height: 520px; }
  .chapter-head { grid-template-columns: 70px minmax(0, 1fr); }
  .chapter-copy { grid-column: 2; }
}

@media (max-width: 620px) {
  .topbar { min-height: 54px; padding-left: 12px; }
  .brand span { display: none; }
  .return-link { padding-inline: 14px; }
  .hero { min-height: 820px; }
  .hero::before { background: linear-gradient(180deg, rgba(3, 5, 8, .22), rgba(3, 5, 8, .64) 46%, rgba(3, 5, 8, .98)); }
  .hero-grid { padding-top: 130px; }
  .hero h1 { font-size: clamp(50px, 16vw, 76px); }
  .facts { grid-template-columns: 1fr; }
  .fact:nth-child(even), .fact:nth-child(odd) { padding-inline: 0; border-left: 0; }
  .pipeline-row { grid-template-columns: 1fr; gap: 20px; }
  .tool-line { grid-template-columns: 1fr; }
  .tool-line div { min-height: 104px; border-right: 0; border-bottom: 1px solid var(--line); }
  .tool-line div:last-child { border-bottom: 0; }
  .character-card { min-height: 360px; }
  .character-card img { min-height: 360px; }
  .chapter-head { grid-template-columns: 1fr; }
  .chapter-copy { grid-column: auto; }
  .frame-group { flex-direction: column; gap: 6px; height: clamp(470px, 138vw, 640px); }
  .frame { min-width: 0; min-height: 52px; }
  .frame.is-active { flex-grow: 6.5; }
  .frame figcaption { right: 10px; bottom: 10px; left: 10px; padding: 8px 9px; }
  .closing-row { align-items: flex-start; flex-direction: column; }
  .viewer-arrow { top: auto; bottom: max(18px, env(safe-area-inset-bottom)); height: 44px; transform: none; }
  .viewer-caption { bottom: max(31px, env(safe-area-inset-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-media video { display: none; }
  .motion-toggle { display: none; }
  .frame, .frame img, .frame figcaption, .character-card img { transition: none; }
}