:root {
  --paper: #f0eee8;
  --paper-deep: #ddd9cf;
  --ink: #121212;
  --blue: #1847a0;
  --coral: #e14b34;
  --green: #36563b;
  --line: rgba(18, 18, 18, 0.22);
  --shell: min(100% - 64px, 1380px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Arial, "Noto Sans SC", "Microsoft YaHei", sans-serif; line-height: 1.55; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; }
button, a, input, textarea { -webkit-tap-highlight-color: transparent; }

.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; }
.skip-link { position: fixed; left: 16px; top: 12px; z-index: 100; min-height: 44px; padding: 10px 14px; background: var(--paper); color: var(--ink); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }

.site-header { min-height: 86px; padding: 17px 32px; display: flex; align-items: center; justify-content: space-between; gap: 28px; border-bottom: 1px solid var(--line); background: rgba(240,238,232,.96); position: sticky; top: 0; z-index: 50; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; min-width: 250px; }
.brand-mark { width: 42px; height: 42px; fill: none; stroke: currentColor; stroke-width: 2.3; stroke-linecap: round; stroke-linejoin: round; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.1; }
.brand-copy strong { font-size: 17px; letter-spacing: .05em; }
.brand-copy small { font-size: 9px; margin-top: 5px; letter-spacing: .16em; }
.site-nav { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 38px); font-size: 13px; font-weight: 700; letter-spacing: .04em; }
.site-nav a { text-decoration: none; padding: 8px 0; border-bottom: 1px solid transparent; }
.site-nav a:hover { border-color: currentColor; }
.site-nav .nav-contact { background: var(--ink); color: var(--paper); padding: 12px 18px; border: 0; }
.menu-toggle { display: none; width: 48px; height: 48px; padding: 0; background: transparent; border: 1px solid var(--ink); position: relative; }
.menu-toggle > span:not(.sr-only) { position: absolute; left: 12px; width: 22px; height: 2px; background: var(--ink); transition: transform .2s ease, top .2s ease; }
.menu-toggle > span:nth-child(2) { top: 18px; }
.menu-toggle > span:nth-child(3) { top: 27px; }
.menu-toggle[aria-expanded="true"] > span:nth-child(2) { top: 22px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] > span:nth-child(3) { top: 22px; transform: rotate(-45deg); }

.section-shell { width: var(--shell); margin-inline: auto; }
.eyebrow { margin: 0 0 22px; color: rgba(255,255,255,.86); font-size: 12px; font-weight: 800; letter-spacing: .22em; }
.eyebrow.dark { color: var(--blue); }
.section-number { font-size: clamp(58px, 7vw, 112px); line-height: .8; font-weight: 900; color: var(--blue); letter-spacing: -.06em; }
.section-number.light { color: var(--paper); }
h1, h2, h3, p { margin-top: 0; }
h2 { margin-bottom: 28px; font-size: clamp(42px, 5.5vw, 86px); line-height: .98; letter-spacing: -.055em; }

.hero { min-height: calc(100vh - 86px); height: 860px; max-height: 980px; position: relative; overflow: hidden; background: #141414; color: white; }
.hero-image { width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(12,12,12,.84) 0%, rgba(12,12,12,.38) 43%, rgba(12,12,12,.06) 72%); }
.hero-echo { position: absolute; right: -1vw; top: 4%; color: rgba(255,255,255,.08); font-size: clamp(100px, 15vw, 238px); font-weight: 900; line-height: .72; letter-spacing: -.08em; text-align: right; }
.hero-content { position: absolute; left: max(32px, calc((100% - 1380px)/2)); top: 50%; transform: translateY(-47%); max-width: 840px; padding-right: 32px; }
.hero h1 { margin: 0 0 30px; font-size: clamp(68px, 9.5vw, 152px); line-height: .82; letter-spacing: -.075em; text-transform: uppercase; }
.hero h1 span { display: block; }
.hero h1 span:last-child { color: var(--paper); -webkit-text-stroke: 1px rgba(255,255,255,.22); }
.hero-lead { max-width: 600px; margin-bottom: 34px; font-size: clamp(18px, 2vw, 26px); color: rgba(255,255,255,.88); }
.hero-actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.button { min-height: 48px; padding: 13px 22px; border: 1px solid transparent; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; text-decoration: none; cursor: pointer; border-radius: 0; }
.button-light { background: var(--paper); color: var(--ink); }
.button-light:hover { background: white; }
.button-dark { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.button-dark:hover { background: var(--blue); border-color: var(--blue); }
.text-link { font-weight: 800; text-underline-offset: 5px; }
.hero-index { position: absolute; right: 32px; bottom: 28px; display: flex; align-items: end; gap: 14px; border-top: 1px solid rgba(255,255,255,.5); padding-top: 10px; }
.hero-index b { font-size: 34px; line-height: 1; color: var(--coral); }
.hero-index span { font-size: 11px; letter-spacing: .13em; }

.intro { min-height: 780px; padding-block: 120px; display: grid; grid-template-columns: .45fr 1.15fr 1fr; gap: clamp(28px, 5vw, 82px); align-items: center; position: relative; }
.intro-copy p:last-child { max-width: 630px; font-size: 18px; color: #383838; }
.loop-figure { margin: 0; align-self: stretch; display: flex; flex-direction: column; }
.loop-figure img { width: 100%; flex: 1; min-height: 510px; object-fit: cover; }
.loop-figure figcaption { padding: 16px 0 0; font-size: 12px; color: #555; border-top: 1px solid var(--ink); }
.material-ruler { position: absolute; left: 0; bottom: 70px; width: 54%; display: flex; justify-content: space-between; border-top: 1px solid var(--line); }
.material-ruler span { width: 1px; height: 12px; background: var(--ink); }

.applications { background: var(--ink); color: var(--paper); display: grid; grid-template-columns: 1.08fr .92fr; min-height: 920px; }
.application-copy { width: auto; margin: 0; padding: 100px clamp(32px, 6vw, 100px); display: grid; grid-template-columns: 130px 1fr; gap: 36px; align-content: start; }
.application-notes { grid-column: 2; margin-top: 48px; }
.application-notes article { display: grid; grid-template-columns: 58px 180px 1fr; gap: 20px; padding: 28px 0; border-top: 1px solid rgba(255,255,255,.24); }
.application-notes article:last-child { border-bottom: 1px solid rgba(255,255,255,.24); }
.application-notes span { color: var(--coral); font-weight: 900; }
.application-notes h3 { margin-bottom: 0; font-size: 22px; }
.application-notes p { margin-bottom: 0; color: rgba(255,255,255,.7); }
.applications-image { width: 100%; height: 100%; object-fit: cover; }

.process { padding-block: 130px 160px; position: relative; }
.process-heading { display: grid; grid-template-columns: 130px 1.5fr 1fr; gap: 38px; align-items: start; margin-bottom: 100px; }
.process-heading > p { max-width: 470px; font-size: 18px; color: #424242; padding-top: 46px; }
.process-line { position: absolute; left: calc((100% - min(100% - 64px, 1380px))/2 + 64px); top: 440px; bottom: 120px; width: 1px; background: var(--blue); }
.process-line span { position: sticky; top: 120px; display: block; width: 11px; height: 11px; margin-left: -5px; background: var(--coral); border-radius: 50%; box-shadow: 0 0 0 6px var(--paper); }
.process-step { display: grid; grid-template-columns: 130px minmax(260px,.75fr) 1.4fr; gap: 38px; align-items: center; min-height: 470px; padding: 58px 0; border-top: 1px solid var(--line); }
.process-step.reverse { grid-template-columns: 130px 1.4fr minmax(260px,.75fr); }
.process-step.reverse .step-copy { grid-column: 3; }
.process-step.reverse img { grid-column: 2; grid-row: 1; }
.step-meta { align-self: start; padding-top: 8px; display: flex; flex-direction: column; gap: 8px; }
.step-meta b { color: var(--blue); font-size: 46px; line-height: 1; letter-spacing: -.04em; }
.step-meta span { font-size: 10px; letter-spacing: .17em; writing-mode: vertical-rl; }
.step-copy h3 { font-size: clamp(34px, 4vw, 62px); margin-bottom: 20px; }
.step-copy p { margin: 0; color: #444; }
.process-step img { width: 100%; height: 390px; object-fit: cover; }

.responsibility { background: var(--green); color: white; display: grid; grid-template-columns: 1fr 1fr; min-height: 850px; }
.responsibility > img { width: 100%; height: 100%; object-fit: cover; }
.responsibility-copy { padding: 100px clamp(32px, 7vw, 110px); display: flex; flex-direction: column; justify-content: center; }
.responsibility-copy h2 { max-width: 740px; }
.record { display: grid; grid-template-columns: 100px 1fr; gap: 30px; padding: 28px 0; border-top: 1px solid rgba(255,255,255,.4); }
.record:last-child { border-bottom: 1px solid rgba(255,255,255,.4); }
.record time { color: #eaf0e4; font-size: 34px; font-weight: 900; line-height: 1; }
.record h3 { margin-bottom: 8px; font-size: 21px; }
.record p { margin-bottom: 0; color: rgba(255,255,255,.92); }

.contact { padding-block: 130px; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(60px, 9vw, 150px); }
.contact-intro > p:not(.eyebrow) { max-width: 590px; font-size: 18px; }
address { margin-top: 60px; font-style: normal; }
address div { display: grid; grid-template-columns: 70px 1fr; gap: 20px; padding: 18px 0; border-top: 1px solid var(--line); }
address div:last-child { border-bottom: 1px solid var(--line); }
address span { font-size: 12px; color: var(--blue); font-weight: 800; }
address p { margin: 0; }
address a { text-underline-offset: 4px; }
.contact-form { align-self: end; padding-top: 78px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.contact-form label:not(.consent) { display: flex; flex-direction: column; gap: 9px; margin-bottom: 24px; font-size: 13px; font-weight: 800; }
input, textarea { width: 100%; border: 0; border-bottom: 1px solid var(--ink); background: transparent; color: var(--ink); padding: 13px 2px; border-radius: 0; }
textarea { border: 1px solid var(--ink); padding: 14px; resize: vertical; min-height: 128px; }
input:focus, textarea:focus { outline: 3px solid var(--coral); outline-offset: 2px; }
.consent { display: flex; align-items: flex-start; gap: 10px; margin: 2px 0 28px; font-size: 12px; font-weight: 400; }
.consent input { width: 18px; height: 18px; margin: 0; flex: 0 0 auto; accent-color: var(--blue); }
.contact-form .button { min-width: 180px; }
.form-status { min-height: 48px; margin: 20px 0 0; padding: 12px 0; color: #7b2418; font-weight: 800; }

.site-footer { padding: 40px 32px; background: var(--ink); color: var(--paper); display: grid; grid-template-columns: 1fr auto auto; gap: 36px; align-items: center; border-top: 1px solid rgba(255,255,255,.14); }
.footer-brand { min-width: 0; }
.site-footer p { margin: 0; font-size: 12px; color: rgba(255,255,255,.7); }

@media (max-width: 1080px) {
  :root { --shell: min(100% - 48px, 1380px); }
  .site-header { padding-inline: 24px; }
  .menu-toggle { display: block; flex: 0 0 auto; }
  .site-nav { position: fixed; inset: 86px 0 auto; background: var(--paper); border-bottom: 1px solid var(--ink); padding: 24px; display: none; flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 17px 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-contact { margin-top: 16px; text-align: center; }
  .hero-content { left: 24px; }
  .intro { grid-template-columns: 110px 1fr; }
  .loop-figure { grid-column: 2; min-height: 500px; }
  .applications { grid-template-columns: 1fr; }
  .application-copy { grid-template-columns: 110px 1fr; }
  .applications-image { max-height: 600px; }
  .process-heading { grid-template-columns: 110px 1fr; }
  .process-heading > p { grid-column: 2; padding: 0; }
  .process-step, .process-step.reverse { grid-template-columns: 110px 1fr; }
  .process-step img, .process-step.reverse img { grid-column: 2; grid-row: auto; }
  .process-step.reverse .step-copy { grid-column: 2; }
  .responsibility { grid-template-columns: 1fr; }
  .responsibility > img { height: 560px; }
  .contact { grid-template-columns: 1fr; }
  .contact-form { padding-top: 0; }
}

@media (max-width: 700px) {
  :root { --shell: calc(100% - 32px); }
  .site-header { min-height: 72px; padding: 12px 16px; }
  .brand { min-width: 0; gap: 9px; }
  .brand { min-height: 44px; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { font-size: 7px; }
  .menu-toggle { width: 44px; height: 44px; }
  .site-nav { top: 72px; max-height: calc(100vh - 72px); overflow-y: auto; }
  .hero { min-height: 700px; height: calc(100svh - 72px); max-height: 820px; }
  .hero-image { object-position: 60% center; }
  .hero-shade { background: linear-gradient(90deg, rgba(12,12,12,.88), rgba(12,12,12,.48)); }
  .hero-content { left: 16px; right: 16px; padding: 0; top: 46%; }
  .hero h1 { font-size: clamp(54px, 18vw, 76px); }
  .hero-lead { font-size: 17px; }
  .hero-actions .text-link, address a { display: inline-flex; align-items: center; min-height: 44px; }
  .hero-index { right: 16px; left: 16px; bottom: 18px; justify-content: flex-end; }
  .hero-echo { font-size: 96px; top: 10%; }
  h2 { font-size: clamp(40px, 13vw, 58px); }
  .section-number { font-size: 58px; }
  .intro { min-height: 0; padding-block: 84px; grid-template-columns: 1fr; gap: 34px; }
  .intro-copy, .loop-figure { grid-column: 1; }
  .loop-figure img { min-height: 430px; }
  .material-ruler { display: none; }
  .application-copy { padding: 76px 16px; grid-template-columns: 1fr; gap: 28px; }
  .application-notes { grid-column: 1; margin-top: 12px; }
  .application-notes article { grid-template-columns: 42px 1fr; }
  .application-notes p { grid-column: 2; }
  .applications-image { height: 440px; }
  .process { padding-block: 86px; }
  .process-heading { grid-template-columns: 1fr; gap: 26px; margin-bottom: 58px; }
  .process-heading > p { grid-column: 1; }
  .process-line { display: none; }
  .process-step, .process-step.reverse { grid-template-columns: 1fr; gap: 22px; min-height: 0; padding: 46px 0; }
  .process-step .step-meta, .process-step.reverse .step-meta { grid-column: 1; flex-direction: row; align-items: baseline; }
  .step-meta span { writing-mode: initial; }
  .process-step .step-copy, .process-step.reverse .step-copy { grid-column: 1; }
  .process-step img, .process-step.reverse img { grid-column: 1; grid-row: auto; height: 280px; }
  .responsibility > img { height: 420px; }
  .responsibility-copy { padding: 76px 16px; }
  .record { grid-template-columns: 76px 1fr; gap: 18px; }
  .record time { font-size: 27px; }
  .contact { padding-block: 86px; gap: 44px; }
  .contact-intro h2 { max-width: 100%; }
  address { margin-top: 40px; }
  address div { grid-template-columns: 56px 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form .button { width: 100%; min-height: 52px; }
  .site-footer { padding: 36px 16px; grid-template-columns: 1fr; gap: 22px; }
  .footer-brand { max-width: 260px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}