:root {
  --paper: #f5f2ec;
  --paper-bright: #fbfaf7;
  --ink: #191918;
  --graphite: #292927;
  --muted: #5f5d58;
  --line: rgba(25, 25, 24, .2);
  --red: #a91424;
  --red-dark: #7e101c;
  --white: #fff;
  --page: min(1380px, calc(100vw - 64px));
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  --sans: Inter, "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.65; overflow-x: hidden; }
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 12px 18px; color: #fff; background: #191918; transform: translateY(-150%); transition: transform .2s ease; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid #e34a57; outline-offset: 4px; }

.site-header { position: fixed; z-index: 100; inset: 0 0 auto; height: 76px; padding: 0 32px; display: flex; align-items: center; justify-content: space-between; background: rgba(245,242,236,.94); border-bottom: 1px solid transparent; transition: border-color .2s ease, background .2s ease; }
.site-header.is-scrolled { border-color: var(--line); background: rgba(245,242,236,.985); }
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 48px; }
.brand-mark { width: 34px; height: 34px; color: var(--ink); flex: 0 0 auto; }
.brand span { display: grid; gap: 1px; }
.brand strong { font-family: var(--serif); font-size: 15px; font-weight: 700; letter-spacing: .04em; }
.brand small { color: var(--muted); font-size: 8px; line-height: 1.2; letter-spacing: .18em; }
.site-nav { display: flex; align-items: center; gap: clamp(20px, 2.4vw, 40px); font-size: 13px; font-weight: 650; }
.site-nav a { position: relative; min-height: 44px; display: inline-flex; align-items: center; }
.site-nav > a:not(.nav-action)::after { content: ""; position: absolute; inset: auto 0 5px; height: 1px; background: var(--red); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.site-nav > a:hover::after, .site-nav > a:focus-visible::after { transform: scaleX(1); }
.nav-action { padding: 0 22px; color: #fff; background: var(--red); }
.nav-action:hover { background: var(--red-dark); }
.menu-button { display: none; min-width: 48px; min-height: 48px; border: 0; background: transparent; color: var(--ink); cursor: pointer; }

.eyebrow { margin: 0 0 20px; color: var(--red-dark); font-size: 11px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; }
.eyebrow.light { color: #ffb8be; }
.section-label { display: flex; gap: 14px; align-items: center; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .14em; white-space: nowrap; }
.section-label::after { content: ""; width: 56px; height: 1px; background: currentColor; opacity: .4; }
.section-label span { color: var(--red); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.section-label.light { color: rgba(255,255,255,.68); }
.section-label.light span { color: #ff909a; }

.hero { min-height: max(720px, 100svh); position: relative; display: grid; align-items: end; overflow: hidden; background: var(--paper); }
.hero-image, .hero-shade { position: absolute; inset: 76px 0 0; height: calc(100% - 76px); object-fit: cover; }
.hero-image { object-position: 64% center; }
.hero-shade { background: linear-gradient(90deg, rgba(245,242,236,.99) 0%, rgba(245,242,236,.9) 29%, rgba(245,242,236,.24) 56%, rgba(245,242,236,0) 76%); }
.hero-content { position: relative; z-index: 2; width: var(--page); margin: 0 auto; padding: 180px 0 12vh; }
.hero h1 { max-width: 780px; margin: 0; font-family: var(--serif); font-size: clamp(54px, 6.2vw, 104px); font-weight: 650; line-height: 1.12; letter-spacing: -.045em; }
.hero-copy { max-width: 600px; margin: 34px 0 0; color: #3f3e3a; font-size: clamp(16px, 1.4vw, 20px); }
.hero-actions { display: flex; align-items: center; gap: 32px; margin-top: 42px; }
.button { min-height: 52px; padding: 0 28px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid transparent; cursor: pointer; font-weight: 750; }
.button-primary { color: #fff; background: var(--red-dark); }
.button-primary:hover { background: #5e0b14; }
.text-link { min-height: 48px; display: inline-flex; align-items: center; gap: 14px; border-bottom: 1px solid var(--ink); font-weight: 700; }
.hero-index { position: absolute; z-index: 2; right: 32px; bottom: 30px; display: flex; gap: 16px; align-items: center; font: 700 11px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.hero-index::before { content: ""; width: 100px; height: 1px; background: var(--ink); opacity: .35; }

.company-intro { width: var(--page); margin: 0 auto; padding: 140px 0; display: grid; grid-template-columns: .6fr 1.25fr .8fr; gap: 5vw; align-items: start; }
.intro-heading h2, .section-head h2, .sequence-head h2, .manufacturing h2, .contact h2, .layer-story h2 { margin: 0; font-family: var(--serif); font-weight: 650; letter-spacing: -.035em; line-height: 1.2; }
.intro-heading h2 { font-size: clamp(38px, 4vw, 64px); }
.intro-copy { padding-top: 36px; color: var(--muted); font-size: 15px; }
.intro-copy p { margin: 0 0 22px; }

.material-system { color: #fff; background: var(--graphite); }
.section-head { width: var(--page); margin: 0 auto; padding: 120px 0 70px; display: grid; grid-template-columns: .6fr 1.25fr .8fr; gap: 5vw; align-items: start; }
.section-head h2 { font-size: clamp(42px, 4.4vw, 72px); }
.section-head > p { margin: 40px 0 0; color: rgba(255,255,255,.72); font-size: 14px; }
.material-row { min-height: 360px; display: grid; grid-template-columns: minmax(70px, .23fr) .8fr 1.45fr minmax(120px, .32fr); align-items: stretch; border-top: 1px solid rgba(255,255,255,.2); }
.material-row:last-child { border-bottom: 1px solid rgba(255,255,255,.2); }
.material-row > * { min-width: 0; }
.material-number { padding: 42px 32px; color: #ff909a; font: 700 13px/1 ui-monospace, SFMono-Regular, Consolas, monospace; border-right: 1px solid rgba(255,255,255,.2); }
.material-text { padding: 58px clamp(28px, 4vw, 70px); display: flex; flex-direction: column; justify-content: center; }
.material-text h3 { margin: 0 0 20px; font-family: var(--serif); font-size: clamp(34px, 3.1vw, 54px); font-weight: 600; }
.material-text p { max-width: 420px; margin: 0; color: rgba(255,255,255,.7); }
.material-row img { height: 100%; min-height: 360px; object-fit: cover; }
.material-row > a { padding: 32px; display: flex; justify-content: center; align-items: center; gap: 18px; border-left: 1px solid rgba(255,255,255,.2); font-size: 13px; font-weight: 700; }
.material-row > a:hover { color: #fff; background: var(--red-dark); }
.material-row.reverse .material-text { order: 3; }
.material-row.reverse img { order: 2; }
.material-row.reverse > a { order: 4; }

.layer-story { min-height: 780px; position: relative; overflow: hidden; color: #fff; background: #0d0e0f; }
.layer-story > img { position: absolute; inset: 0; height: 100%; object-fit: cover; object-position: center; opacity: .72; }
.layer-story::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5,6,7,.94) 0 28%, rgba(5,6,7,.45) 60%, rgba(5,6,7,.08)); }
.layer-copy { position: relative; z-index: 2; width: var(--page); margin: 0 auto; padding: 130px 0; }
.layer-copy h2 { max-width: 650px; font-size: clamp(48px, 5.5vw, 88px); }
.layer-copy > p:not(.eyebrow) { max-width: 550px; margin: 34px 0 60px; color: rgba(255,255,255,.78); }
.layer-copy .section-label { margin-bottom: 72px; }
.layer-legend { width: min(700px, 100%); display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid rgba(255,255,255,.55); }
.layer-legend span { position: relative; padding: 20px 10px 0 0; color: rgba(255,255,255,.72); font-size: 12px; }
.layer-legend span::before { content: ""; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; background: var(--red); }

.sequence { width: var(--page); margin: 0 auto; padding: 130px 0 150px; }
.sequence-head { display: grid; grid-template-columns: .6fr 1.25fr .8fr; gap: 5vw; align-items: start; }
.sequence-head h2 { font-size: clamp(42px, 4.4vw, 72px); }
.sequence-head > p { margin: 38px 0 0; color: var(--muted); font-size: 14px; }
.sequence-line { margin: 100px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--ink); }
.sequence-line li { min-height: 190px; padding: 26px 24px 20px 0; position: relative; display: grid; align-content: start; gap: 12px; border-right: 1px solid var(--line); }
.sequence-line li:last-child { border-right: 0; }
.sequence-line li::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; background: var(--red); }
.sequence-line span { color: var(--red-dark); font: 750 11px/1 ui-monospace, SFMono-Regular, Consolas, monospace; }
.sequence-line strong { font-family: var(--serif); font-size: 22px; }
.sequence-line small { max-width: 150px; color: var(--muted); font-size: 12px; }

.manufacturing { min-height: 700px; display: grid; grid-template-columns: 1.15fr .85fr; background: var(--paper-bright); }
.manufacturing > img { height: 100%; min-height: 700px; object-fit: cover; }
.manufacturing-copy { padding: clamp(70px, 8vw, 140px); display: flex; flex-direction: column; justify-content: center; }
.manufacturing-copy .section-label { margin-bottom: 68px; }
.manufacturing h2 { font-size: clamp(42px, 4.3vw, 70px); }
.manufacturing-copy > p:not(.eyebrow):not(.record-note) { margin: 34px 0 0; color: var(--muted); }
.record-note { margin: 36px 0 0; padding-top: 24px; border-top: 1px solid var(--line); font-size: 13px; font-weight: 700; }

.contact { position: relative; min-height: 980px; padding: 120px max(32px, calc((100vw - min(1380px, calc(100vw - 64px))) / 2)); display: grid; grid-template-columns: .85fr 1fr; gap: 8vw; color: #fff; background: #17191c; overflow: hidden; }
.contact > img { position: absolute; inset: 0; height: 100%; object-fit: cover; opacity: .32; }
.contact::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,19,22,.95), rgba(17,19,22,.78) 52%, rgba(17,19,22,.9)); }
.contact-intro, .inquiry { position: relative; z-index: 2; }
.contact-intro { display: flex; flex-direction: column; justify-content: space-between; }
.contact-intro .section-label { margin-bottom: 96px; }
.contact h2 { max-width: 620px; font-size: clamp(46px, 5vw, 80px); }
.contact-data { margin: 90px 0 0; display: grid; gap: 26px; }
.contact-data div { padding-top: 18px; display: grid; grid-template-columns: 90px 1fr; border-top: 1px solid rgba(255,255,255,.28); }
.contact-data dt { color: rgba(255,255,255,.58); font-size: 11px; letter-spacing: .16em; }
.contact-data dd { margin: 0; font-size: 14px; }
.contact-data a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: underline; text-underline-offset: 5px; }
.inquiry { align-self: end; padding: clamp(34px, 5vw, 74px); color: var(--ink); background: var(--paper-bright); }
.form-heading { margin-bottom: 42px; display: flex; justify-content: space-between; gap: 30px; border-bottom: 1px solid var(--ink); padding-bottom: 20px; }
.form-heading span { font-family: var(--serif); font-size: 30px; font-weight: 650; }
.form-heading p { max-width: 260px; margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.inquiry label { margin-bottom: 24px; display: grid; gap: 9px; color: #3d3b38; font-size: 12px; font-weight: 700; }
.inquiry input, .inquiry select, .inquiry textarea { width: 100%; min-height: 52px; padding: 12px 0; color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid #77746d; border-radius: 0; }
.inquiry textarea { resize: vertical; }
.inquiry input:focus, .inquiry select:focus, .inquiry textarea:focus { border-color: var(--red-dark); outline: 2px solid transparent; box-shadow: 0 2px 0 var(--red-dark); }
.form-submit { min-height: 76px; display: grid; grid-template-columns: auto 1fr; gap: 24px; align-items: center; }
.form-status { margin: 0; color: var(--red-dark); font-size: 13px; font-weight: 700; }

.site-footer { padding: 70px 32px 28px; color: #fff; background: #111211; display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; }
.footer-brand small { color: rgba(255,255,255,.54); }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 32px; }
.footer-nav a { min-height: 44px; display: inline-flex; align-items: center; color: rgba(255,255,255,.78); font-size: 13px; }
.footer-nav a:hover { color: #fff; }
.footer-meta { grid-column: 1 / -1; padding-top: 24px; display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.58); font-size: 11px; }

@media (max-width: 1100px) {
  :root { --page: calc(100vw - 48px); }
  .company-intro, .section-head, .sequence-head { grid-template-columns: .5fr 1.2fr .8fr; gap: 32px; }
  .material-row { grid-template-columns: 64px .8fr 1.1fr 110px; }
  .material-number { padding-inline: 24px; }
  .material-row > a { padding-inline: 12px; gap: 8px; white-space: nowrap; }
  .contact { gap: 48px; }
}

@media (max-width: 820px) {
  :root { --page: calc(100vw - 40px); }
  html { scroll-padding-top: 66px; }
  .site-header { height: 66px; padding: 0 20px; background: var(--paper); }
  .brand strong { font-size: 13px; }
  .brand small { display: none; }
  .brand-mark { width: 30px; height: 30px; }
  .menu-button { display: inline-flex; align-items: center; gap: 10px; justify-content: center; z-index: 3; }
  .menu-label { font-size: 12px; font-weight: 750; }
  .menu-lines, .menu-lines::before { width: 20px; height: 1px; display: block; background: currentColor; transition: transform .2s ease; }
  .menu-lines { position: relative; }
  .menu-lines::before { content: ""; position: absolute; top: 6px; left: 0; }
  .menu-button[aria-expanded="true"] .menu-lines { transform: rotate(45deg); }
  .menu-button[aria-expanded="true"] .menu-lines::before { top: 0; transform: rotate(90deg); }
  .site-nav { position: fixed; z-index: 2; inset: 66px 0 0; padding: 52px 20px 30px; display: grid; grid-auto-rows: min-content; align-content: start; gap: 0; background: var(--paper); transform: translateX(100%); visibility: hidden; transition: transform .24s ease, visibility .24s step-end; }
  .site-nav.is-open { transform: translateX(0); visibility: visible; transition: transform .24s ease; }
  .site-nav a { min-height: 68px; border-bottom: 1px solid var(--line); font-family: var(--serif); font-size: 24px; }
  .site-nav .nav-action { margin-top: 28px; padding: 0 22px; min-height: 56px; justify-content: center; color: #fff; font-family: var(--sans); font-size: 14px; border: 0; }
  .hero { min-height: 820px; align-items: end; }
  .hero-image, .hero-shade { top: 66px; height: calc(100% - 66px); }
  .hero-image { object-position: 66% center; }
  .hero-shade { background: linear-gradient(180deg, rgba(245,242,236,.86) 0 22%, rgba(245,242,236,.36) 54%, rgba(245,242,236,.98) 84%); }
  .hero-content { padding: 140px 0 76px; }
  .hero h1 { font-size: clamp(48px, 13vw, 76px); }
  .hero-copy { max-width: 460px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 18px; }
  .hero-index { display: none; }
  .company-intro, .section-head, .sequence-head { padding-top: 88px; padding-bottom: 72px; grid-template-columns: 1fr; gap: 32px; }
  .intro-copy, .section-head > p, .sequence-head > p { padding-top: 0; margin-top: 0; }
  .material-row, .material-row.reverse { min-height: 0; grid-template-columns: 54px 1fr; }
  .material-number { grid-column: 1; grid-row: 1 / span 2; padding: 32px 18px; }
  .material-text, .material-row.reverse .material-text { order: initial; grid-column: 2; grid-row: 1; padding: 42px 24px; }
  .material-row img, .material-row.reverse img { order: initial; grid-column: 2; grid-row: 2; height: 250px; min-height: 250px; }
  .material-row > a, .material-row.reverse > a { order: initial; grid-column: 2; grid-row: 3; min-height: 58px; justify-content: space-between; padding: 0 24px; border-left: 0; border-top: 1px solid rgba(255,255,255,.2); }
  .layer-story { min-height: 760px; }
  .layer-story > img { object-position: 62% center; }
  .layer-story::after { background: linear-gradient(90deg, rgba(5,6,7,.93), rgba(5,6,7,.3)); }
  .layer-copy { padding: 90px 0; }
  .layer-copy .section-label { margin-bottom: 64px; }
  .layer-legend { grid-template-columns: 1fr; border-top: 0; border-left: 1px solid rgba(255,255,255,.55); }
  .layer-legend span { min-height: 42px; padding: 0 0 0 20px; display: flex; align-items: center; }
  .layer-legend span::before { top: 17px; left: -4px; }
  .sequence { padding: 90px 0 110px; }
  .sequence-line { margin-top: 56px; grid-template-columns: 1fr; border-top: 0; border-left: 1px solid var(--ink); }
  .sequence-line li { min-height: 124px; padding: 0 0 30px 28px; border-right: 0; border-bottom: 1px solid var(--line); }
  .sequence-line li::before { top: 0; left: -5px; }
  .manufacturing { grid-template-columns: 1fr; }
  .manufacturing > img { min-height: 440px; height: 440px; }
  .manufacturing-copy { padding: 76px 20px 88px; }
  .manufacturing-copy .section-label { margin-bottom: 54px; }
  .contact { min-height: 0; padding: 88px 20px; grid-template-columns: 1fr; gap: 72px; }
  .contact > img { object-position: center; opacity: .22; }
  .contact-intro .section-label { margin-bottom: 64px; }
  .contact-data { margin-top: 60px; }
  .inquiry { padding: 38px 24px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .form-heading { display: grid; }
  .form-submit { grid-template-columns: 1fr; }
  .form-submit .button { width: 100%; }
  .site-footer { padding: 58px 20px 24px; grid-template-columns: 1fr; gap: 40px; }
  .footer-meta { display: grid; }
}

@media (max-width: 420px) {
  :root { --page: calc(100vw - 32px); }
  .brand strong { font-size: 12px; }
  .menu-label { display: none; }
  .hero { min-height: 780px; }
  .hero h1 { font-size: 46px; }
  .hero-copy { font-size: 15px; }
  .intro-heading h2, .section-head h2, .sequence-head h2, .manufacturing h2, .contact h2 { font-size: 40px; }
  .layer-copy h2 { font-size: 46px; }
  .material-text h3 { font-size: 34px; }
  .manufacturing > img { height: 340px; min-height: 340px; }
  .contact-data div { grid-template-columns: 64px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
}