@font-face {
  font-family: "Noto Sans SC Local";
  src: url("assets/fonts/noto-sans-sc-subset.ttf") format("truetype");
  font-display: swap;
  font-style: normal;
  font-weight: 100 900;
}

:root {
  --ink: #111411;
  --ink-soft: #292d29;
  --paper: #f4f1e9;
  --paper-2: #e7e3da;
  --zinc: #d8d6cf;
  --silver: #b8bab7;
  --amber: #f0a11a;
  --red: #9d2b22;
  --green: #2f6b58;
  --line: rgba(17, 20, 17, .22);
  --gutter: clamp(20px, 4vw, 68px);
  --max: 1600px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC Local", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
body.menu-open { overflow: hidden; }
::selection { color: var(--ink); background: var(--amber); }
::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: var(--ink); }
::-webkit-scrollbar-thumb { background: var(--amber); border: 3px solid var(--ink); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .28em; }
button, input, textarea { font: inherit; caret-color: var(--red); }
img { display: block; width: 100%; height: auto; }
svg { display: block; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: square; stroke-linejoin: miter; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -.035em; text-wrap: balance; }
p { text-wrap: pretty; }

.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: 14px;
  top: 10px;
  z-index: 1000;
  padding: 10px 16px;
  color: var(--ink);
  background: var(--amber);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto;
  align-items: center;
  min-height: 74px;
  padding: 0 var(--gutter);
  color: var(--paper);
  background: rgba(17, 20, 17, .96);
  border-bottom: 1px solid rgba(244, 241, 233, .18);
}
.brand {
  display: inline-flex;
  align-items: center;
  width: max-content;
  min-height: 48px;
  gap: 12px;
  color: inherit;
  font-size: clamp(15px, 1.2vw, 19px);
  font-weight: 700;
  letter-spacing: -.02em;
  text-decoration: none;
}
.brand-mark { width: 38px; height: 38px; stroke-width: 2; }
.brand-mark .brand-scan { stroke: var(--amber); stroke-width: 3; }
.site-menu { display: flex; align-items: center; gap: clamp(18px, 2.8vw, 46px); }
.site-menu a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: rgba(244, 241, 233, .78);
  font-size: 14px;
  text-decoration: none;
}
.site-menu a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 5px;
  left: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 240ms var(--ease);
}
.site-menu a:hover, .site-menu a:focus-visible { color: var(--paper); }
.site-menu a:hover::after, .site-menu a:focus-visible::after { transform: scaleX(1); }
.menu-toggle { display: none; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 42%) minmax(0, 58%);
  min-height: calc(100svh - 74px);
  overflow: hidden;
  background: var(--paper);
}
.hero-copy {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(80px, 9vw, 150px) clamp(30px, 5vw, 82px) clamp(140px, 16vw, 250px) var(--gutter);
  background:
    linear-gradient(90deg, var(--paper) 0%, rgba(244, 241, 233, .98) 80%, rgba(244, 241, 233, .72) 100%);
}
.hero-copy::before,
.section-heading::before,
.contact-intro::before {
  content: "";
  position: absolute;
  top: 8%;
  bottom: 8%;
  left: var(--gutter);
  width: 1px;
  background: var(--line);
  transform: translateX(-18px);
}
.hero h1 {
  max-width: 9.4ch;
  margin-bottom: 28px;
  font-size: clamp(44px, 6.1vw, 92px);
  font-weight: 850;
}
.hero-lede { max-width: 34em; margin-bottom: 34px; color: #3e433e; font-size: clamp(16px, 1.25vw, 20px); }
.hero-directions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 720px;
  margin: 0 0 28px;
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  list-style: none;
}
.hero-directions li {
  min-width: 0;
  padding: 12px 10px 12px 0;
  font-size: clamp(13px, 1vw, 16px);
  font-weight: 760;
}
.hero-directions li + li { padding-left: 12px; border-left: 1px solid var(--line); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.action {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-width: 190px;
  min-height: 52px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  text-decoration: none;
  transition: color 240ms var(--ease), background 240ms var(--ease), transform 240ms var(--ease);
}
.action svg, .material-copy a svg, .contact-form button svg { width: 20px; height: 20px; }
.action-primary { background: var(--amber); }
.action-secondary { background: transparent; }
.action:hover { transform: translateY(-3px); }
.action-primary:hover { background: #ffc04b; }
.action-secondary:hover { color: var(--paper); background: var(--ink); }
.hero-visual { position: relative; min-width: 0; background: var(--ink); }
.hero-visual > img { width: 100%; height: 100%; object-fit: cover; object-position: 58% center; }
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(17, 20, 17, .16), transparent 35%);
  pointer-events: none;
}
.inspection-gate {
  position: absolute;
  z-index: 2;
  top: 16%;
  bottom: 13%;
  left: 26%;
  width: 22%;
  border: clamp(10px, 1.2vw, 20px) solid rgba(17, 20, 17, .94);
  border-bottom-width: clamp(18px, 2vw, 34px);
  box-shadow: 20px 24px 60px rgba(0, 0, 0, .34);
  pointer-events: none;
}
.inspection-gate span {
  position: absolute;
  top: 5%;
  left: -4%;
  width: 108%;
  height: 5px;
  background: var(--amber);
  box-shadow: 0 0 28px 8px rgba(240, 161, 26, .44);
  opacity: 0;
}
.inspection-gate.is-scanning span { animation: inspect-scan 5.6s var(--ease) 1 both; }
.hero-index {
  position: absolute;
  z-index: 3;
  right: var(--gutter);
  bottom: 30px;
  color: rgba(244, 241, 233, .72);
  font-size: 11px;
  letter-spacing: .18em;
}
.steel-path {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 12%;
  left: 0;
  height: clamp(42px, 7vw, 104px);
  background: linear-gradient(180deg, #f3f4f1 0%, #a5a8a6 32%, #e9eae7 58%, #818582 100%);
  box-shadow: 0 18px 38px rgba(17, 20, 17, .24);
  transform: skewY(-1.4deg);
  pointer-events: none;
}
.steel-path span {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 58%;
  width: 3px;
  background: var(--amber);
  box-shadow: 0 0 28px 8px rgba(240, 161, 26, .36);
}

.section-heading {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: clamp(28px, 8vw, 130px);
  align-items: end;
  padding: clamp(84px, 10vw, 150px) var(--gutter) clamp(50px, 7vw, 100px);
  border-bottom: 1px solid var(--line);
}
.section-heading h2, .quality h2, .development h2, .applications h2, .contact h2 {
  max-width: 15ch;
  margin-bottom: 0;
  font-size: clamp(38px, 5.4vw, 82px);
  font-weight: 820;
}
.section-heading p { max-width: 42em; margin-bottom: 0; color: #4c514c; font-size: clamp(16px, 1.2vw, 19px); }
.product-ledger { border-top: 1px solid var(--ink); }
.material-row {
  display: grid;
  grid-template-columns: minmax(0, 55%) minmax(0, 45%);
  min-height: 410px;
  border-bottom: 1px solid var(--ink);
}
.material-image { min-width: 0; overflow: hidden; }
.material-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 900ms var(--ease); }
.material-row:hover .material-image img { transform: scale(1.025); }
.material-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(44px, 7vw, 110px) var(--gutter);
  background: var(--paper-2);
}
.material-copy h3 { margin-bottom: 22px; font-size: clamp(34px, 4vw, 66px); }
.material-copy p { max-width: 38em; margin-bottom: 34px; color: #474c47; }
.material-copy a {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, 300px);
  min-height: 48px;
  padding-top: 12px;
  border-top: 1px solid currentColor;
  text-decoration: none;
}
.material-red .material-copy { color: var(--paper); background: var(--red); }
.material-red .material-copy p { color: rgba(244, 241, 233, .82); }
.material-zam .material-copy { background: var(--zinc); }
.material-az .material-copy { color: var(--paper); background: var(--ink); }
.material-az .material-copy p { color: rgba(244, 241, 233, .72); }

.manufacturing { color: var(--paper); background: var(--ink); }
.section-heading-light { border-color: rgba(244, 241, 233, .2); }
.section-heading-light::before { background: rgba(244, 241, 233, .2); }
.section-heading-light p { color: rgba(244, 241, 233, .7); }
.process-stage { position: relative; min-height: 760px; overflow: hidden; }
.process-stage > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.process-stage::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(17, 20, 17, .12), rgba(17, 20, 17, .82)); }
.process-line {
  position: absolute;
  z-index: 2;
  right: var(--gutter);
  bottom: 42px;
  left: var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(244, 241, 233, .55);
}
.process-line li { position: relative; min-height: 118px; padding: 24px clamp(14px, 2vw, 30px) 0 0; }
.process-line li::before { content: ""; position: absolute; top: -7px; left: 0; width: 13px; height: 13px; background: var(--amber); }
.process-line strong, .process-line span { display: block; }
.process-line strong { margin-bottom: 8px; font-size: 18px; }
.process-line span { color: rgba(244, 241, 233, .66); font-size: 14px; }
.digital-band { display: grid; grid-template-columns: minmax(0, 43%) minmax(0, 57%); min-height: 600px; border-top: 1px solid rgba(244, 241, 233, .22); }
.digital-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(60px, 8vw, 130px) var(--gutter); }
.digital-copy h3 { max-width: 13ch; margin-bottom: 28px; font-size: clamp(34px, 4.2vw, 68px); }
.digital-copy p { max-width: 40em; margin-bottom: 0; color: rgba(244, 241, 233, .7); }
.digital-band > img { width: 100%; height: 100%; object-fit: cover; }

.quality { display: grid; grid-template-columns: minmax(0, 58%) minmax(0, 42%); min-height: 760px; }
.quality-visual { position: relative; min-width: 0; overflow: hidden; background: var(--ink); }
.quality-visual img { width: 100%; height: 100%; object-fit: cover; }
.scan-line { position: absolute; top: 0; bottom: 0; left: 58%; width: 3px; background: var(--amber); box-shadow: 0 0 28px 10px rgba(240, 161, 26, .4); }
.quality-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(70px, 9vw, 140px) var(--gutter); }
.quality-copy > p { max-width: 38em; margin: 30px 0 44px; color: #4c514c; }
.quality-list { margin: 0; }
.quality-list > div { display: grid; grid-template-columns: 120px 1fr; gap: 18px; padding: 18px 0; border-top: 1px solid var(--line); }
.quality-list dt { font-weight: 750; }
.quality-list dd { margin: 0; color: #545954; }

.development { display: grid; grid-template-columns: minmax(0, 48%) minmax(0, 52%); color: var(--paper); background: #13241e; }
.development-copy { display: flex; flex-direction: column; justify-content: center; min-height: 720px; padding: clamp(70px, 9vw, 140px) var(--gutter); }
.development-copy > p { max-width: 42em; margin: 32px 0 44px; color: rgba(244, 241, 233, .74); }
.development-copy ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(244, 241, 233, .3); }
.development-copy li { display: grid; grid-template-columns: 115px 1fr; gap: 22px; padding: 17px 0; border-bottom: 1px solid rgba(244, 241, 233, .2); }
.development-copy li span { color: #75bd9f; font-weight: 750; }
.development-visual { min-width: 0; }
.development-visual img { width: 100%; height: 100%; object-fit: cover; }

.applications { display: grid; grid-template-columns: minmax(0, 56%) minmax(0, 44%); min-height: 660px; background: var(--zinc); }
.application-track {
  display: grid;
  align-content: center;
  padding: clamp(70px, 9vw, 140px) var(--gutter);
  background:
    linear-gradient(110deg, transparent 0 18%, rgba(255,255,255,.65) 18.3% 19%, transparent 19.3% 55%, rgba(255,255,255,.48) 55.3% 56%, transparent 56.3%),
    linear-gradient(180deg, #dfe0dc 0%, #aeb1ae 48%, #e9e9e5 51%, #8f9390 100%);
}
.application-track span {
  display: flex;
  align-items: center;
  min-height: 94px;
  padding: 0 22px;
  border-top: 1px solid rgba(17,20,17,.46);
  font-size: clamp(24px, 3vw, 44px);
  font-weight: 760;
  letter-spacing: -.03em;
}
.application-track span:last-child { border-bottom: 1px solid rgba(17,20,17,.46); }
.application-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(70px, 9vw, 140px) var(--gutter); }
.application-copy p { max-width: 38em; margin: 30px 0 36px; color: #454a45; }
.action-dark { color: var(--paper); background: var(--ink); }
.action-dark:hover { color: var(--ink); background: var(--amber); }

.contact { padding: clamp(90px, 11vw, 170px) var(--gutter); color: var(--paper); background: var(--ink); }
.contact-intro { position: relative; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); gap: clamp(32px, 8vw, 140px); align-items: end; margin-bottom: clamp(60px, 8vw, 110px); }
.contact-intro::before { background: rgba(244, 241, 233, .2); }
.contact-intro p { max-width: 38em; margin-bottom: 0; color: rgba(244, 241, 233, .68); }
.contact-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px clamp(26px, 5vw, 80px); }
.field { display: grid; gap: 10px; }
.field-wide { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 650; }
.field input, .field textarea {
  width: 100%;
  border: 0;
  border-bottom: 1px solid rgba(244, 241, 233, .48);
  border-radius: 0;
  padding: 12px 0;
  color: var(--paper);
  background: transparent;
  resize: vertical;
}
.field input:focus, .field textarea:focus { border-color: var(--amber); outline: 0; box-shadow: 0 2px 0 var(--amber); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: #ffb17a; box-shadow: 0 2px 0 #ffb17a; }
.field-error { min-height: 1.4em; color: #ffb17a; font-size: 13px; }
.form-actions { display: grid; grid-template-columns: minmax(220px, 340px) 1fr; gap: 26px; align-items: center; }
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 0 18px;
  border: 1px solid var(--amber);
  color: var(--ink);
  background: var(--amber);
  cursor: pointer;
}
.contact-form button:hover { background: #ffc04b; }
.form-status { margin: 0; color: #ffd18a; }

.site-footer {
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr;
  gap: 24px;
  align-items: center;
  min-height: 150px;
  padding: 30px var(--gutter);
  color: var(--paper);
  background: #070907;
  border-top: 1px solid rgba(244, 241, 233, .18);
}
.site-footer p { margin: 0; color: rgba(244, 241, 233, .56); font-size: 13px; }
.site-footer p:last-child { text-align: right; }

@keyframes inspect-scan {
  0% { transform: translateY(0); opacity: 0; }
  12% { opacity: 1; }
  78% { transform: translateY(clamp(280px, 48vh, 560px)); opacity: 1; }
  100% { transform: translateY(clamp(300px, 52vh, 610px)); opacity: 0; }
}

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .menu-toggle {
    display: inline-grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(244, 241, 233, .34);
    color: var(--paper);
    background: transparent;
  }
  .menu-toggle svg { width: 24px; height: 24px; }
  .site-menu {
    position: fixed;
    inset: 0;
    z-index: -1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    padding: 96px var(--gutter) 54px;
    background: var(--ink);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-16px);
    transition: opacity 260ms var(--ease), transform 260ms var(--ease);
  }
  .site-menu.is-open { z-index: 90; opacity: 1; visibility: visible; transform: translateY(0); transition-delay: 0s; }
  .site-menu a { min-height: 68px; border-bottom: 1px solid rgba(244, 241, 233, .2); font-size: clamp(24px, 5vw, 40px); }
  .menu-toggle { position: relative; z-index: 110; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { min-height: 680px; padding-bottom: 180px; }
  .hero-visual { min-height: 620px; }
  .section-heading, .contact-intro { grid-template-columns: 1fr; align-items: start; }
  .material-row, .digital-band, .quality, .development, .applications { grid-template-columns: 1fr; }
  .material-row { min-height: 0; }
  .material-image { min-height: 400px; }
  .material-copy { min-height: 360px; }
  .process-stage { min-height: 680px; }
  .process-line { grid-template-columns: repeat(2, 1fr); }
  .digital-band > img, .quality-visual, .development-visual, .application-track { min-height: 520px; }
  .quality-copy, .development-copy, .application-copy { min-height: 620px; }
}

@media (max-width: 620px) {
  :root { --gutter: 20px; }
  html { scroll-padding-top: 68px; }
  .site-header { min-height: 68px; }
  .brand { max-width: calc(100vw - 88px); gap: 8px; font-size: 13px; }
  .brand-mark { flex: 0 0 32px; width: 32px; height: 32px; }
  .hero-copy { min-height: 600px; padding: 72px var(--gutter) 150px; }
  .hero-copy::before, .section-heading::before, .contact-intro::before { left: 18px; transform: none; }
  .hero h1 { margin-left: 14px; font-size: clamp(42px, 13vw, 60px); }
  .hero-lede, .hero-directions, .hero-actions { margin-left: 14px; }
  .hero-directions { grid-template-columns: 1fr; width: calc(100% - 14px); }
  .hero-directions li + li { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .hero-actions { display: grid; }
  .action { width: 100%; min-width: 0; }
  .hero-visual { min-height: 430px; }
  .inspection-gate { top: 12%; bottom: 10%; left: 22%; width: 34%; }
  .steel-path { bottom: 5%; height: 54px; }
  .section-heading { gap: 22px; padding: 76px var(--gutter) 44px 34px; }
  .section-heading h2, .quality h2, .development h2, .applications h2, .contact h2 { font-size: clamp(36px, 10.7vw, 50px); }
  .material-image { min-height: 300px; }
  .material-copy { min-height: 330px; padding: 56px var(--gutter); }
  .process-stage { min-height: 760px; }
  .process-line { right: 20px; bottom: 22px; left: 20px; grid-template-columns: 1fr; }
  .process-line li { min-height: 98px; }
  .digital-copy, .quality-copy, .development-copy, .application-copy { min-height: auto; padding: 76px var(--gutter); }
  .digital-band > img, .quality-visual, .development-visual, .application-track { min-height: 380px; }
  .quality-list > div { grid-template-columns: 94px 1fr; gap: 12px; }
  .development-copy li { grid-template-columns: 90px 1fr; }
  .contact { padding: 84px var(--gutter); }
  .contact-intro { padding-left: 14px; }
  .contact-form { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
  .form-actions { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; min-height: 220px; }
  .site-footer p:last-child { text-align: left; }
}

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