:root {
  --paper: #f5f3f0;
  --ink: #2a2824;
  --taupe: #8b7d6d;
  --warm-gray: #6b665e;
  --sage: #6b7d6b;
  --rule: #d4ccc4;
  --white: #ffffff;
  --header-h: 72px;
  --rail-w: 74px;
  --pad: clamp(30px, 6vw, 96px);
  font-family: Satoshi, "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); }
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: square; stroke-linejoin: miter; }
figure { position: relative; margin: 0; }
.site-header {
  position: sticky; z-index: 30; top: 0; height: var(--header-h); margin-left: var(--rail-w); padding: 0 34px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
  background: rgba(245,243,240,.91); border-bottom: 1px solid var(--rule); backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 280px; }
.brand-mark { width: 16px; height: 16px; background: var(--sage); border: 1px solid var(--ink); }
.brand-name { font-size: 13px; font-weight: 750; letter-spacing: .03em; }
.brand-code { padding-left: 12px; color: var(--warm-gray); border-left: 1px solid var(--rule); font-size: 8px; letter-spacing: .12em; }
.site-header nav { display: flex; align-items: center; gap: clamp(18px,2.6vw,40px); }
.site-header nav a { position: relative; padding: 27px 0; font-size: 10px; font-weight: 700; letter-spacing: .08em; }
.site-header nav a::after { content: ""; position: absolute; right: 0; bottom: 20px; left: 0; height: 1px; background: var(--sage); transform: scaleX(0); transform-origin: left; transition: transform .22s ease; }
.site-header nav a:hover::after, .site-header nav a:focus-visible::after { transform: scaleX(1); }
.header-action { min-width: 132px; min-height: 42px; padding: 0 17px; display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--paper); background: var(--sage); border: 1px solid var(--sage); font-size: 10px; font-weight: 700; letter-spacing: .08em; transition: color .2s ease, background .2s ease; }
.header-action:hover { color: var(--sage); background: transparent; }
.mobile-nav { display: none; position: relative; }
.mobile-nav summary { min-width: 64px; padding: 10px 12px; border: 1px solid var(--rule); color: var(--ink); font-size: 10px; font-weight: 700; letter-spacing: .08em; text-align: center; cursor: pointer; list-style: none; }
.mobile-nav summary::-webkit-details-marker { display: none; }
.mobile-nav nav { position: absolute; top: calc(100% + 12px); right: 0; width: min(260px, calc(100vw - 30px)); padding: 8px 18px; display: grid; background: var(--paper); border: 1px solid var(--rule); }
.mobile-nav nav a { padding: 14px 0; border-bottom: 1px solid var(--rule); color: var(--ink); font-size: 12px; }
.mobile-nav nav a:last-child { border-bottom: 0; }

.page-index {
  position: fixed; z-index: 40; top: 0; bottom: 0; left: 0; width: var(--rail-w); padding: 22px 0 24px;
  display: flex; flex-direction: column; align-items: center;
  color: var(--paper); background: var(--ink); border-right: 1px solid rgba(245,243,240,.16);
}
.index-menu { width: 26px; height: 20px; margin: 7px 0 29px; display: grid; align-content: center; gap: 7px; }
.index-menu i { display: block; height: 2px; background: var(--paper); }
.index-label, .index-scroll { font-size: 8px; font-weight: 700; letter-spacing: .14em; }
.index-label { padding-bottom: 12px; border-bottom: 1px solid rgba(245,243,240,.4); }
.page-index nav { display: grid; gap: 2px; margin-top: 11px; }
.page-index nav a { position: relative; width: 46px; height: 45px; display: grid; place-items: center; color: rgba(245,243,240,.56); font-family: Georgia, serif; font-size: 20px; transition: color .2s ease; }
.page-index nav a::after { content: ""; position: absolute; right: 5px; bottom: 2px; left: 5px; height: 1px; background: currentColor; transform: scaleX(.4); transition: transform .2s ease; }
.page-index nav a:hover, .page-index nav a:focus-visible { color: var(--paper); }
.page-index nav a:hover::after, .page-index nav a:focus-visible::after { transform: scaleX(1); }
.index-scroll { margin-top: auto; writing-mode: vertical-rl; transform: rotate(180deg); color: rgba(245,243,240,.66); }

main { margin-left: var(--rail-w); }
section { scroll-margin-top: var(--header-h); border-bottom: 1px solid var(--rule); }
.paper {
  background-color: var(--paper);
  background-image: repeating-linear-gradient(0deg, rgba(42,40,36,.018) 0, rgba(42,40,36,.018) 1px, transparent 1px, transparent 6px);
}
.ink { color: var(--paper); background: var(--ink); border-color: rgba(245,243,240,.18); }
.sage { color: var(--paper); background: var(--sage); border-color: rgba(245,243,240,.24); }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { margin-bottom: 28px; font-family: Georgia, "Songti SC", serif; font-weight: 400; letter-spacing: -.055em; }
h1 { font-size: clamp(56px,6.2vw,94px); line-height: .98; }
h1 em { color: var(--sage); font-style: italic; }
h2 { font-size: clamp(42px,4.6vw,68px); line-height: 1.04; }
p { line-height: 1.85; }
.section-number { font-family: Georgia, serif; font-size: 78px; line-height: .85; letter-spacing: -.04em; }
.section-number.light { color: var(--paper); }
.section-label { width: max-content; margin: 18px 0 34px; padding-bottom: 10px; border-bottom: 1px solid var(--taupe); font-size: 9px; font-weight: 800; letter-spacing: .15em; }
.section-label.light { color: rgba(245,243,240,.8); border-color: rgba(245,243,240,.46); }
.button { min-height: 49px; padding: 0 20px; display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; border: 1px solid; font-size: 10px; font-weight: 800; letter-spacing: .08em; transition: color .2s ease, background .2s ease; }
.button-primary { color: var(--paper); background: var(--sage); border-color: var(--sage); }
.button-primary:hover { color: var(--sage); background: transparent; }
.button-light { color: var(--ink); background: var(--paper); border-color: var(--paper); }
.button-light:hover { color: var(--paper); background: transparent; }
.text-link { display: inline-block; padding: 0 0 7px; border-bottom: 1px solid currentColor; font-size: 10px; font-weight: 750; letter-spacing: .06em; transition: color .2s ease; }
.text-link:hover { color: var(--sage); }

.hero {
  position: relative; min-height: calc(100vh - var(--header-h)); padding: 70px var(--pad) 145px;
  display: grid; grid-template-columns: .82fr 1.18fr; gap: 5vw; align-items: center; overflow: hidden;
}
.hero-copy { position: relative; z-index: 2; }
.hero-copy > p { max-width: 600px; color: var(--warm-gray); font-size: 14px; }
.hero-actions { margin-top: 33px; display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.hero-figure { min-height: 590px; overflow: hidden; border: 1px solid var(--taupe); }
.hero-figure img { height: 100%; object-fit: cover; }
.hero-note {
  position: absolute; right: var(--pad); bottom: 28px; left: var(--pad); padding: 18px 20px;
  display: grid; grid-template-columns: 180px 1fr 1.4fr; gap: 24px; align-items: center;
  color: var(--ink); background: rgba(245,243,240,.82); border: 1px solid var(--rule); backdrop-filter: blur(12px);
}
.hero-note span { color: var(--sage); font-size: 8px; font-weight: 800; letter-spacing: .13em; }
.hero-note b { font-size: 12px; }
.hero-note small { color: var(--warm-gray); font-size: 10px; }

.products { padding: 112px var(--pad); display: grid; grid-template-columns: .8fr 1.2fr; gap: 58px 6vw; }
.section-intro { align-self: center; }
.section-intro > p { color: var(--warm-gray); }
.detail-figure { min-height: 560px; overflow: hidden; border: 1px solid var(--taupe); }
.detail-figure img { height: 100%; object-fit: cover; }
.direction-list { grid-column: 1 / -1; border-top: 1px solid var(--taupe); }
.direction-list article { min-height: 83px; padding: 19px 3px; display: grid; grid-template-columns: 54px 1fr 150px; gap: 24px; align-items: center; border-bottom: 1px solid var(--rule); }
.direction-list article > span { font-family: Georgia, serif; font-size: 22px; }
.direction-list h3 { margin-bottom: 5px; font-size: 16px; }
.direction-list p { margin: 0; color: var(--warm-gray); font-size: 10px; }
.direction-list article > b { color: var(--sage); font-size: 9px; letter-spacing: .06em; }

.family { padding: 112px var(--pad); }
.family-heading { margin-bottom: 52px; display: flex; justify-content: space-between; gap: 7vw; align-items: end; }
.family-heading h2 { margin-bottom: 0; }
.family-heading > p { width: min(440px,38vw); margin-bottom: 3px; color: rgba(245,243,240,.6); }
.family-figure { overflow: hidden; border: 1px solid rgba(245,243,240,.34); }
.family-figure img { aspect-ratio: 16 / 8.9; object-fit: cover; }
.family-list { display: grid; grid-template-columns: repeat(4,1fr); border-bottom: 1px solid rgba(245,243,240,.28); }
.family-list span { padding: 17px 12px; border-right: 1px solid rgba(245,243,240,.2); color: rgba(245,243,240,.6); font-size: 8px; letter-spacing: .09em; text-align: center; }
.family-list span:last-child { border-right: 0; }

.context { padding: 112px var(--pad); display: grid; grid-template-columns: .76fr 1.24fr; gap: 6vw; align-items: center; }
.context-copy > p { color: var(--warm-gray); }
.context-notes { margin-top: 36px; border-top: 1px solid var(--taupe); }
.context-notes div { padding: 15px 0; display: grid; grid-template-columns: 32px 1fr 150px; gap: 16px; align-items: center; border-bottom: 1px solid var(--rule); }
.context-notes span { color: var(--sage); font-family: Georgia, serif; }
.context-notes b { font-size: 12px; }
.context-notes small { color: var(--warm-gray); font-size: 9px; }
.context-figure { min-height: 620px; overflow: hidden; border: 1px solid var(--taupe); }
.context-figure img { height: 100%; object-fit: cover; }

.process { padding: 112px var(--pad); display: grid; grid-template-columns: .82fr 1.18fr; gap: 6vw; align-items: center; }
.process-copy > p { color: var(--warm-gray); }
.process-figure { min-height: 560px; overflow: hidden; border: 1px solid var(--taupe); }
.process-figure img { height: 100%; object-fit: cover; }
.process-line { grid-column: 1 / -1; margin: 14px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5,1fr); list-style: none; border-top: 1px solid var(--taupe); border-bottom: 1px solid var(--rule); }
.process-line li { position: relative; min-height: 102px; padding: 23px 18px; border-right: 1px solid var(--rule); }
.process-line li:last-child { border-right: 0; }
.process-line span, .process-line b, .process-line small { display: block; }
.process-line span { color: var(--sage); font-family: Georgia, serif; font-size: 18px; }
.process-line b { margin: 10px 0 7px; font-size: 11px; }
.process-line small { color: var(--warm-gray); font-size: 9px; }

.records { padding: 112px var(--pad); display: grid; grid-template-columns: 1fr .92fr; gap: 6vw; align-items: center; }
.records-copy > p { color: rgba(245,243,240,.68); }
.record-list { margin-top: 35px; border-top: 1px solid rgba(245,243,240,.38); }
.record-list article { padding: 17px 0; display: grid; grid-template-columns: 134px 1fr 88px; gap: 18px; align-items: start; border-bottom: 1px solid rgba(245,243,240,.26); }
.record-list article > span { grid-row: span 2; color: rgba(245,243,240,.63); font-size: 8px; letter-spacing: .09em; }
.record-list h3 { margin: 0; font-size: 13px; }
.record-list p { margin: 5px 0 0; color: rgba(245,243,240,.68); font-size: 10px; line-height: 1.55; }
.record-list a { grid-column: 3; grid-row: 1 / span 2; padding-bottom: 5px; border-bottom: 1px solid rgba(245,243,240,.55); font-size: 8px; text-align: right; }
.records-figure { min-height: 680px; overflow: hidden; border: 1px solid rgba(245,243,240,.38); }
.records-figure img { height: 100%; object-fit: cover; }

.about { padding: 112px var(--pad); display: grid; grid-template-columns: .9fr 1.1fr; gap: 6vw; align-items: center; }
.about-copy > p { color: var(--warm-gray); }
.about-lead { color: var(--ink) !important; font-size: 17px; }
.fact-list { margin: 34px 0 0; border-top: 1px solid var(--taupe); }
.fact-list div { padding: 15px 0; display: grid; grid-template-columns: 120px 1fr; gap: 20px; border-bottom: 1px solid var(--rule); }
.fact-list dt { color: var(--warm-gray); font-size: 9px; letter-spacing: .08em; }
.fact-list dd { margin: 0; font-size: 11px; font-weight: 750; }
.about-figure { min-height: 650px; overflow: hidden; border: 1px solid var(--taupe); }
.about-figure img { height: 100%; object-fit: cover; }

.contact { padding: 112px var(--pad) 0; display: grid; grid-template-columns: .72fr 1.28fr; gap: 5vw; align-items: center; }
.contact-copy > p { color: rgba(245,243,240,.6); }
.contact-figure { min-height: 650px; overflow: hidden; border: 1px solid rgba(245,243,240,.3); }
.contact-figure img { height: 100%; object-fit: cover; }
footer { grid-column: 1 / -1; padding: 27px 0; display: flex; justify-content: space-between; gap: 20px; color: rgba(245,243,240,.43); font-size: 8px; letter-spacing: .08em; }

@media (max-width: 1080px) {
  .brand-code, .site-header nav { display: none; }
  .site-header > .header-action { margin-left: auto; }
  .mobile-nav { display: block; }
  .mobile-nav nav { display: grid; }
  .hero, .products, .context, .process, .records, .about, .contact { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-figure, .detail-figure, .context-figure, .process-figure, .records-figure, .about-figure, .contact-figure { min-height: 520px; }
  .hero-note { position: static; grid-column: 1 / -1; grid-template-columns: 1fr 1fr; }
  .hero-note span { grid-column: 1 / -1; }
  .family-heading { display: block; }
  .family-heading > p { width: auto; margin-top: 26px; }
}

@media (max-width: 680px) {
  :root { --header-h: 64px; --rail-w: 0px; }
  .site-header { margin-left: 0; padding: 0 15px; }
  .brand { min-width: 0; }
  .brand-name { font-size: 12px; }
  .header-action { min-width: 108px; padding: 0 12px; gap: 10px; }
  .site-header > .header-action { display: none; }
  .page-index { display: none; }
  main { margin-left: 0; }
  .hero, .products, .family, .context, .process, .records, .about, .contact { padding: 76px 20px; }
  .contact { padding-bottom: 0; }
  h1 { font-size: 49px; }
  h2 { font-size: 40px; }
  .section-number { font-size: 61px; }
  .hero { gap: 36px; }
  .hero-figure { min-height: 380px; }
  .hero-figure img { object-position: 68% center; }
  .hero-note { padding: 15px; grid-template-columns: 1fr; }
  .hero-note span { grid-column: auto; }
  .products { gap: 40px; }
  .hero-figure, .detail-figure, .context-figure, .process-figure, .records-figure, .about-figure, .contact-figure { min-height: 390px; }
  .direction-list article { grid-template-columns: 40px 1fr; }
  .direction-list article > b { grid-column: 2; }
  .family-figure img { aspect-ratio: 1 / 1.1; }
  .family-list { grid-template-columns: repeat(2,1fr); }
  .family-list span:nth-child(2) { border-right: 0; }
  .family-list span:nth-child(-n+2) { border-bottom: 1px solid rgba(245,243,240,.22); }
  .context-notes div { grid-template-columns: 30px 1fr; }
  .context-notes small { grid-column: 2; }
  .process-line { grid-template-columns: 1fr; border-left: 1px solid var(--taupe); }
  .process-line li { min-height: auto; padding: 17px 20px; border-right: 0; border-bottom: 1px solid var(--rule); }
  .process-line li:last-child { border-bottom: 0; }
  .record-list article { grid-template-columns: 1fr; }
  .record-list article > span { grid-row: auto; }
  .record-list a { grid-column: 1; grid-row: auto; width: max-content; text-align: left; }
  .fact-list div { grid-template-columns: 1fr; gap: 8px; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}