:root {
  color-scheme: light;
  --ink: #111319;
  --ink-soft: #252832;
  --paper: #f2efe8;
  --paper-deep: #e4ddd1;
  --white: #ffffff;
  --accent: #df3158;
  --accent-soft: #f7d9e0;
  --gold: #c8a76c;
  --muted: #6d6d73;
  --line: rgba(17, 19, 25, .16);
  --rail: 300px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

figure, p, h1, h2, h3, dl, dd { margin: 0; }

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: #fff;
  background: var(--accent);
  transform: translateY(-180%);
}

.skip-link:focus { transform: translateY(0); }

.brand-rail {
  position: fixed;
  z-index: 30;
  inset: 0 auto 0 0;
  width: var(--rail);
  min-height: 100vh;
  padding: 34px 28px 28px;
  color: #f6f3ed;
  background:
    radial-gradient(circle at 18% 8%, rgba(223, 49, 88, .22), transparent 27%),
    var(--ink);
  display: flex;
  flex-direction: column;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 54px;
  height: 54px;
  object-fit: contain;
  border-radius: 16px;
  background: #fff;
  padding: 6px;
}

.brand-name {
  font-size: 24px;
  font-weight: 760;
  letter-spacing: .06em;
}

.brand-en {
  margin-top: 2px;
  color: rgba(255,255,255,.5);
  font-size: 10px;
  letter-spacing: .22em;
}

.rail-kicker {
  margin-top: 68px;
  color: var(--gold);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .24em;
}

.rail-nav {
  margin-top: 18px;
  border-top: 1px solid rgba(255,255,255,.14);
}

.rail-nav a {
  min-height: 54px;
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: center;
  color: rgba(255,255,255,.7);
  border-bottom: 1px solid rgba(255,255,255,.12);
  text-decoration: none;
  font-size: 14px;
  transition: color .2s ease, padding-left .2s ease;
}

.rail-nav a span {
  color: rgba(255,255,255,.3);
  font-size: 10px;
  letter-spacing: .1em;
}

.rail-nav a:hover,
.rail-nav a:focus-visible {
  padding-left: 5px;
  color: #fff;
}

.rail-nav a:focus-visible,
.mobile-header a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.rail-note {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.14);
}

.rail-note span {
  color: var(--accent-soft);
  font-size: 11px;
  letter-spacing: .18em;
}

.rail-note p {
  margin-top: 8px;
  color: rgba(255,255,255,.47);
  font-size: 12px;
  line-height: 1.7;
}

.exhibition { margin-left: var(--rail); }

.mobile-header { display: none; }

.chapter {
  scroll-margin-top: 18px;
  padding: clamp(72px, 8vw, 132px) clamp(30px, 6vw, 96px);
}

.chapter-index {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 720;
  letter-spacing: .22em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .18em;
}

.hero {
  min-height: 100vh;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(420px, 46%) 1fr;
  background: var(--paper);
}

.hero-copy {
  padding: clamp(54px, 7vw, 104px) clamp(34px, 5vw, 76px);
  display: flex;
  flex-direction: column;
}

.hero-copy .eyebrow { margin-top: auto; }

.hero h1 {
  max-width: 780px;
  margin: 22px 0 28px;
  font-family: Georgia, "Songti SC", "STSong", serif;
  font-size: clamp(46px, 6.4vw, 96px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -.05em;
}

.hero-lead {
  max-width: 690px;
  color: #55565c;
  font-size: clamp(16px, 1.35vw, 20px);
}

.hero-meta {
  margin-top: auto;
  padding-top: 34px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.hero-meta span,
.definition-list dt,
.device-notes span,
.matrix-label {
  display: block;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.hero-meta strong {
  display: block;
  margin-top: 4px;
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background: #1a1c21;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 48%;
  background: linear-gradient(transparent, rgba(17,19,25,.76));
  pointer-events: none;
}

.hero-visual figcaption {
  position: absolute;
  z-index: 1;
  right: 36px;
  bottom: 34px;
  left: 36px;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 30px;
}

.hero-visual figcaption span {
  color: rgba(255,255,255,.58);
  font-size: 10px;
  letter-spacing: .16em;
}

.hero-visual figcaption strong {
  max-width: 360px;
  text-align: right;
  font-family: Georgia, "Songti SC", serif;
  font-size: 20px;
  font-weight: 500;
}

.chapter-heading h2,
.landscape-intro h2,
.guide-copy h2,
.mobile-copy h2,
.official-statement h2 {
  margin-top: 20px;
  font-family: Georgia, "Songti SC", "STSong", serif;
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 500;
  line-height: 1.18;
  letter-spacing: -.035em;
}

.brand-story { background: #fff; }

.brand-story .chapter-heading { max-width: 1020px; }

.story-layout {
  margin-top: 64px;
  display: grid;
  grid-template-columns: minmax(340px, .75fr) minmax(520px, 1.25fr);
  gap: clamp(44px, 7vw, 120px);
  align-items: end;
}

.story-copy { padding-bottom: 24px; }

.story-copy > p {
  color: #5c5d63;
  font-size: 16px;
}

.story-copy > p + p { margin-top: 22px; }

.story-copy .lead-paragraph {
  color: var(--ink);
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(22px, 2.2vw, 34px);
  line-height: 1.55;
}

.definition-list {
  margin-top: 42px;
  border-top: 1px solid var(--line);
}

.definition-list div {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.definition-list dd {
  margin-top: 5px;
  color: #4f5056;
  font-size: 14px;
}

.story-image img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.story-image figcaption {
  padding: 14px 0 0 22%;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
}

.image-atlas {
  color: #f5f0e8;
  background: var(--ink);
}

.image-atlas .chapter-index { color: rgba(255,255,255,.45); }

.split-heading {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: clamp(38px, 7vw, 110px);
  align-items: end;
}

.split-heading > p {
  color: rgba(255,255,255,.58);
  font-size: 15px;
}

.atlas-layout {
  margin-top: 68px;
  min-height: 760px;
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  grid-template-rows: 1fr 1fr;
  gap: 14px;
}

.atlas-layout figure {
  position: relative;
  overflow: hidden;
  background: #090a0d;
}

.atlas-main { grid-row: 1 / 3; }

.atlas-layout img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.atlas-layout figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(8,9,12,.78));
  pointer-events: none;
}

.atlas-layout figcaption {
  position: absolute;
  z-index: 1;
  right: 22px;
  bottom: 20px;
  left: 22px;
}

.atlas-layout figcaption span {
  display: block;
  color: var(--accent-soft);
  font-size: 10px;
  letter-spacing: .16em;
}

.atlas-layout figcaption strong {
  display: block;
  margin-top: 5px;
  font-family: Georgia, "Songti SC", serif;
  font-size: 18px;
  font-weight: 500;
}

.content-landscape {
  display: grid;
  grid-template-columns: minmax(330px, .8fr) minmax(460px, 1.2fr);
  grid-template-areas:
    "intro image"
    "list image";
  gap: 48px clamp(44px, 7vw, 110px);
  background: #dce3e1;
}

.landscape-intro { grid-area: intro; }
.landscape-image { grid-area: image; }
.landscape-list { grid-area: list; }

.landscape-intro > p {
  margin-top: 28px;
  max-width: 600px;
  color: #525a58;
}

.landscape-image img {
  width: 100%;
  height: 100%;
  min-height: 690px;
  object-fit: cover;
}

.landscape-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(17,19,25,.24);
}

.landscape-list li {
  padding: 19px 0;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  border-bottom: 1px solid rgba(17,19,25,.24);
}

.landscape-list li > span {
  color: #6f7e7a;
  font-size: 11px;
}

.landscape-list h3 { font-size: 17px; }
.landscape-list p { margin-top: 4px; color: #5a625f; font-size: 13px; }

.browse-guide {
  padding: 0;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  background: #fff;
}

.guide-panorama {
  position: relative;
  min-height: 860px;
}

.guide-panorama img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.guide-panorama figcaption {
  position: absolute;
  right: 28px;
  bottom: 28px;
  left: 28px;
  padding: 15px 18px;
  color: #fff;
  background: rgba(17,19,25,.74);
  backdrop-filter: blur(10px);
  font-size: 12px;
}

.guide-copy {
  padding: clamp(72px, 8vw, 126px) clamp(36px, 6vw, 90px);
  align-self: center;
}

.guide-copy > p,
.mobile-copy > p {
  margin-top: 26px;
  color: #5c5d64;
}

.device-notes {
  margin-top: 44px;
  border-top: 1px solid var(--line);
}

.device-notes article {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.device-notes h3 { margin-top: 5px; font-size: 18px; }
.device-notes p { margin-top: 6px; color: #6a6b71; font-size: 13px; }

.playback-faq {
  color: #fff;
  background: #2b2330;
}

.playback-faq .chapter-index,
.playback-faq .split-heading > p { color: rgba(255,255,255,.55); }

.faq-lines {
  margin-top: 62px;
  border-top: 1px solid rgba(255,255,255,.2);
}

.faq-lines article {
  padding: 34px 0;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  border-bottom: 1px solid rgba(255,255,255,.2);
}

.faq-number {
  color: var(--accent-soft);
  font-family: Georgia, serif;
  font-size: 28px;
}

.faq-lines h3 {
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(22px, 2.3vw, 34px);
  font-weight: 500;
}

.faq-lines p {
  margin-top: 10px;
  color: rgba(255,255,255,.6);
}

.mobile-reading {
  display: grid;
  grid-template-columns: minmax(330px, .8fr) minmax(520px, 1.2fr);
  gap: clamp(50px, 8vw, 130px);
  align-items: center;
  background: #ede8df;
}

.mobile-copy > p + p { margin-top: 18px; }

.mobile-visuals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: end;
}

.mobile-visuals figure:last-child { transform: translateY(56px); }

.mobile-visuals img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.mobile-visuals figcaption {
  padding: 10px 0;
  color: var(--muted);
  font-size: 11px;
  border-bottom: 1px solid var(--line);
}

.service-faq { background: #fff; }

.service-matrix {
  margin-top: 58px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.service-matrix article {
  min-height: 240px;
  padding: clamp(26px, 4vw, 48px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.service-matrix h3 {
  margin-top: 38px;
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(22px, 2vw, 30px);
  font-weight: 500;
}

.service-matrix article > p:last-child {
  margin-top: 12px;
  color: var(--muted);
}

.official-statement {
  margin-top: 84px;
  padding: clamp(42px, 7vw, 90px);
  color: #fff;
  background: var(--ink);
}

.official-statement h2 { max-width: 760px; }

.official-statement > p:last-child {
  max-width: 900px;
  margin-top: 28px;
  color: rgba(255,255,255,.62);
}

.site-footer {
  padding: 38px clamp(30px, 6vw, 96px);
  color: rgba(255,255,255,.54);
  background: #090a0d;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px 60px;
  align-items: end;
  font-size: 12px;
}

.site-footer > p:last-child { grid-column: 1 / -1; }

.site-footer strong {
  color: #fff;
  font-size: 20px;
  letter-spacing: .08em;
}

.site-footer div p { margin-top: 3px; }

@media (max-width: 1180px) {
  :root { --rail: 250px; }

  .brand-rail { padding-inline: 22px; }
  .hero { grid-template-columns: minmax(370px, 48%) 1fr; }
  .story-layout { grid-template-columns: 1fr; }
  .content-landscape { grid-template-columns: 1fr 1fr; }
  .mobile-reading { grid-template-columns: .9fr 1.1fr; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 118px; }
  .brand-rail { display: none; }
  .exhibition { margin-left: 0; }

  .mobile-header {
    position: sticky;
    z-index: 40;
    top: 0;
    display: block;
    color: #fff;
    background: rgba(17,19,25,.96);
    backdrop-filter: blur(14px);
  }

  .mobile-brand {
    padding: 12px 18px 8px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .mobile-brand img {
    width: 34px;
    height: 34px;
    object-fit: contain;
    padding: 4px;
    border-radius: 10px;
    background: #fff;
  }

  .mobile-brand strong { font-size: 17px; letter-spacing: .08em; }

  .mobile-header nav {
    display: flex;
    gap: 20px;
    padding: 8px 18px 12px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .mobile-header nav::-webkit-scrollbar { display: none; }

  .mobile-header a {
    flex: 0 0 auto;
    color: rgba(255,255,255,.66);
    font-size: 12px;
    text-decoration: none;
  }

  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
  }

  .hero-copy { min-height: 640px; }
  .hero-visual { min-height: 66vw; }
  .hero h1 { font-size: clamp(44px, 11vw, 78px); }

  .split-heading,
  .content-landscape,
  .browse-guide,
  .mobile-reading {
    grid-template-columns: 1fr;
  }

  .content-landscape {
    grid-template-areas: "intro" "image" "list";
  }

  .landscape-image img { min-height: 60vw; }
  .guide-panorama { min-height: 70vw; }
  .mobile-visuals { max-width: 680px; }
  .mobile-visuals figure:last-child { transform: translateY(30px); }
}

@media (max-width: 620px) {
  .chapter { padding: 64px 20px; }
  .hero-copy { min-height: 610px; padding: 40px 20px; }
  .hero-copy .eyebrow { margin-top: auto; }
  .hero-meta { grid-template-columns: 1fr; gap: 9px; }
  .hero-meta div { display: flex; justify-content: space-between; gap: 16px; }
  .hero-meta strong { margin-top: 0; }
  .hero-visual figcaption { right: 20px; bottom: 18px; left: 20px; }
  .hero-visual figcaption strong { font-size: 14px; }

  .story-layout,
  .atlas-layout {
    margin-top: 42px;
  }

  .story-layout { gap: 36px; }
  .story-image figcaption { padding-left: 0; }

  .atlas-layout {
    min-height: 0;
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .atlas-main { grid-row: auto; }
  .atlas-layout figure { aspect-ratio: 4 / 3; }

  .guide-copy { padding: 64px 20px; }
  .guide-panorama { min-height: 92vw; }

  .faq-lines article {
    grid-template-columns: 44px 1fr;
    gap: 14px;
  }

  .mobile-visuals { gap: 8px; }
  .mobile-visuals figure:last-child { transform: translateY(18px); }

  .service-matrix { grid-template-columns: 1fr; }
  .service-matrix article { min-height: 0; }

  .official-statement { margin-top: 56px; padding: 42px 24px; }

  .site-footer {
    grid-template-columns: 1fr;
    padding: 32px 20px;
  }

  .site-footer > p:last-child { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rail-nav a { transition: none; }
}