:root {
  --graphite: #151a1c;
  --graphite-soft: #22292b;
  --zinc: #c8ced0;
  --mineral: #f3f5f2;
  --paper: #fbfcfa;
  --amber: #c88a33;
  --amber-light: #e4ba72;
  --pine: #29584d;
  --ink: #1f2527;
  --muted: #697173;
  --line: #dfe3e1;
  --shell: 1200px;
  --header-height: 84px;
  --z-sticky: 20;
  --shadow-soft: 0 24px 70px rgba(21, 26, 28, 0.1);
  --font-display: "Songti SC", "STSong", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-data: "SFMono-Regular", "Roboto Mono", "DIN Alternate", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

button, a { -webkit-tap-highlight-color: transparent; }

button { font: inherit; }

:focus-visible {
  outline: 3px solid var(--amber-light);
  outline-offset: 4px;
}

.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: 80;
  transform: translateY(-160%);
  padding: 10px 16px;
  background: var(--paper);
  color: var(--graphite);
  border-radius: 4px;
}

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

.shell {
  width: min(calc(100% - 40px), var(--shell));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  min-height: var(--header-height);
  background: rgba(251, 252, 250, 0.96);
  border-bottom: 1px solid rgba(31, 37, 39, 0.09);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--amber);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-mark path:first-child { stroke: var(--graphite); }
.brand-mark circle { fill: var(--amber); stroke: var(--paper); stroke-width: 1.4; }

.brand-copy { display: grid; line-height: 1.2; min-width: 0; }
.brand-copy strong { font-size: 19px; letter-spacing: 0.08em; }
.brand-copy small { margin-top: 5px; color: var(--muted); font-size: 12px; letter-spacing: 0.04em; }

.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav a { position: relative; padding: 12px 0; font-size: 15px; font-weight: 600; }
.site-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 5px;
  height: 2px;
  background: var(--amber);
  transition: right 180ms ease;
}
.site-nav a:not(.nav-cta):hover::after,
.site-nav a:not(.nav-cta):focus-visible::after,
.site-nav a.is-current::after { right: 0; }

.nav-cta { min-width: 104px; text-align: center; color: white; background: var(--graphite); border-radius: 3px; }
.nav-cta:hover { background: var(--pine); }

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 0;
  background: transparent;
  color: var(--ink);
}
.nav-toggle span:not(.sr-only) { width: 24px; height: 2px; background: currentColor; transition: transform 180ms ease, opacity 180ms ease; }

.hero {
  position: relative;
  min-height: min(780px, calc(100svh - var(--header-height)));
  overflow: hidden;
  color: white;
  background: var(--graphite);
  display: grid;
  align-items: end;
}

.hero-image,
.hero-scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image { object-fit: cover; object-position: center; }
.hero-scrim { background: linear-gradient(90deg, rgba(8, 12, 13, 0.96) 0%, rgba(8, 12, 13, 0.82) 35%, rgba(8, 12, 13, 0.2) 70%, rgba(8, 12, 13, 0.1) 100%); }

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 40px), var(--shell));
  min-height: 540px;
  display: flex;
  align-items: center;
  padding-block: 80px 140px;
}

.hero-copy { width: min(650px, 64%); }

.section-kicker {
  margin: 0 0 18px;
  color: var(--pine);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.hero .section-kicker,
.section-kicker-light { color: var(--amber-light); }

.hero h1,
.section h2,
.contact-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.14;
}

.hero h1 { max-width: 650px; font-size: clamp(46px, 5.5vw, 78px); }
.hero h1 em { display: block; color: var(--amber-light); font-style: normal; }
.hero-lead { max-width: 620px; margin: 28px 0 0; color: rgba(255, 255, 255, 0.76); font-size: 18px; line-height: 1.9; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #1c1811; background: var(--amber-light); }
.button-primary:hover { background: #f1cc8a; }
.button-ghost { color: white; border-color: rgba(255, 255, 255, 0.45); background: rgba(21, 26, 28, 0.25); }
.button-ghost:hover { border-color: white; background: rgba(255, 255, 255, 0.1); }

.material-track {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: max-content minmax(30px, 1fr) max-content minmax(30px, 1fr) max-content;
  align-items: center;
  gap: 16px;
  padding: 26px 30px;
  margin-bottom: 30px;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(17, 22, 24, 0.78);
  backdrop-filter: blur(18px);
}
.track-stage { display: grid; grid-template-columns: 24px auto; column-gap: 10px; align-items: center; }
.track-stage .sample-dot { grid-row: 1 / 3; width: 24px; height: 24px; border: 1px solid rgba(255,255,255,.28); border-radius: 50%; }
.track-ash .sample-dot { background: radial-gradient(circle at 36% 34%, #62696b, #151a1c 68%); }
.track-rich .sample-dot { background: radial-gradient(circle at 30% 30%, #eef2f2, #747d80 55%, #252b2d 100%); }
.track-product .sample-dot { background: radial-gradient(circle at 35% 30%, #fff, #d8d9d3 72%); }
.track-stage small { color: rgba(255,255,255,.55); font-size: 12px; letter-spacing: .08em; }
.track-stage strong { font-size: 14px; }
.track-line { height: 1px; background: repeating-linear-gradient(90deg, var(--amber-light) 0 4px, transparent 4px 9px); opacity: .8; }

.fact-strip { background: var(--paper); border-bottom: 1px solid var(--line); }
.fact-grid { display: grid; grid-template-columns: .8fr 1fr 1.35fr; }
.fact { min-width: 0; padding: 34px 30px; border-left: 1px solid var(--line); }
.fact:last-child { border-right: 1px solid var(--line); }
.fact strong { display: block; font-family: var(--font-data); font-size: clamp(22px, 2.2vw, 32px); line-height: 1.2; overflow-wrap: anywhere; }
.fact span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }

.section { padding: 120px 0; }
.section-heading { max-width: 760px; margin-bottom: 54px; }
.section-heading h2,
.section h2,
.contact-section h2 { font-size: clamp(34px, 4vw, 56px); }
.split-heading { max-width: none; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: 80px; align-items: end; }
.split-heading > p { margin: 0; color: var(--muted); }

.business-section { background: var(--paper); }
.business-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.business-card { position: relative; min-width: 0; min-height: 420px; padding: 34px; overflow: hidden; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.business-card.feature-card { background: var(--mineral); }
.card-index { color: var(--pine); font-family: var(--font-data); font-size: 13px; font-weight: 700; letter-spacing: .14em; }
.business-card h3 { margin: 78px 0 16px; font-family: var(--font-display); font-size: 28px; line-height: 1.3; }
.business-card p { margin: 0; color: var(--muted); }
.material-swatch { position: absolute; right: -40px; bottom: -54px; width: 190px; height: 190px; border-radius: 50%; opacity: .86; }
.swatch-ash { background: radial-gradient(circle at 35% 30%, #747b7d, #181d1f 66%); box-shadow: inset 0 0 0 18px rgba(255,255,255,.04); }
.swatch-zinc { background: radial-gradient(circle at 30% 25%, #fff, #9ea6a8 38%, #2f3638 75%); box-shadow: inset 20px -20px 40px rgba(0,0,0,.25); }
.swatch-oxide { background: radial-gradient(circle at 34% 30%, #fff, #e1e2dc 70%); box-shadow: inset 0 0 0 24px rgba(200,138,51,.08); }

.path-section { color: white; background: var(--graphite); }
.path-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: 100px; }
.path-intro { position: sticky; top: calc(var(--header-height) + 50px); align-self: start; }
.path-intro p:last-child { max-width: 520px; color: rgba(255,255,255,.58); }
.path-list { margin: 0; padding: 0; list-style: none; }
.path-list li { display: grid; grid-template-columns: 68px minmax(0, 1fr); gap: 24px; padding: 32px 0; border-top: 1px solid rgba(255,255,255,.14); }
.path-list li:last-child { border-bottom: 1px solid rgba(255,255,255,.14); }
.path-list > li > span { color: var(--amber-light); font-family: var(--font-data); font-size: 13px; }
.path-list h3 { margin: 0 0 10px; font-size: 22px; }
.path-list p { margin: 0; color: rgba(255,255,255,.58); }

.product-section { background: var(--mineral); }
.product-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.product-card { min-width: 0; min-height: 420px; display: grid; grid-template-columns: minmax(180px, .7fr) minmax(0, 1fr); align-items: center; gap: 40px; padding: 46px; border: 1px solid rgba(31,37,39,.08); overflow: hidden; }
.product-card > div:last-child { position: relative; z-index: 1; }
.product-card span { color: var(--pine); font-size: 13px; font-weight: 700; letter-spacing: .14em; }
.product-card h3 { margin: 14px 0; font-family: var(--font-display); font-size: 34px; }
.product-card p { margin: 0; color: var(--muted); }
.product-oxide { background: #fff; }
.product-rich { color: white; background: var(--pine); }
.product-rich span { color: var(--amber-light); }
.product-rich p { color: rgba(255,255,255,.7); }
.product-orb { width: 220px; aspect-ratio: 1; border-radius: 50%; }
.product-oxide .product-orb { background: radial-gradient(circle at 36% 28%, #fff, #e5e6e0 56%, #b7bbb7 100%); box-shadow: inset -24px -22px 54px rgba(70,76,74,.18), 0 26px 50px rgba(28,35,34,.12); }
.product-rich .product-orb { background: radial-gradient(circle at 34% 28%, #f8fbfa, #9fa9aa 26%, #3f494b 63%, #171d1e 100%); box-shadow: inset -20px -20px 54px rgba(0,0,0,.35), 0 28px 52px rgba(0,0,0,.22); }

.product-gallery { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, .78fr) minmax(0, .78fr); gap: 16px; margin-top: 24px; }
.product-photo { position: relative; min-width: 0; height: 460px; margin: 0; overflow: hidden; background: var(--graphite-soft); }
.product-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform 360ms ease; }
.product-photo:hover img { transform: scale(1.02); }

.news-home-section { background: var(--paper); }
.news-feature {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  min-width: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: white;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}
.news-feature:hover { transform: translateY(-3px); border-color: var(--amber); box-shadow: var(--shadow-soft); }
.news-date { display: flex; flex-direction: column; justify-content: space-between; min-height: 300px; padding: 34px; color: white; background: var(--graphite); }
.news-date time { display: grid; }
.news-date time strong { color: var(--amber-light); font-family: var(--font-data); font-size: 34px; line-height: 1; }
.news-date time span, .news-date > span { margin-top: 8px; color: rgba(255,255,255,.58); font-size: 13px; }
.news-feature-copy { min-width: 0; padding: 44px 52px; }
.news-feature h3 { max-width: 850px; margin: 0 0 16px; font-family: var(--font-display); font-size: clamp(26px, 3vw, 40px); line-height: 1.38; }
.news-feature p { max-width: 760px; margin: 0; color: var(--muted); }
.text-link { display: inline-block; margin-top: 30px; color: var(--pine); font-weight: 700; }
.section-action { display: flex; justify-content: flex-end; margin-top: 30px; }

.inner-page { background: var(--mineral); }
.shell-narrow { width: min(calc(100% - 40px), 920px); margin-inline: auto; }
.media-hero { position: relative; color: white; background: var(--graphite); overflow: hidden; }
.media-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 0 52%;
  opacity: .18;
  background: repeating-linear-gradient(135deg, transparent 0 22px, rgba(228,186,114,.35) 22px 23px);
}
.media-hero-inner { position: relative; z-index: 1; min-height: 420px; display: flex; flex-direction: column; justify-content: center; padding-block: 72px; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 44px; color: rgba(255,255,255,.56); font-size: 13px; }
.breadcrumb a:hover { color: white; }
.media-hero h1 { margin: 0; font-family: var(--font-display); font-size: clamp(48px, 7vw, 82px); line-height: 1.1; }
.media-hero p:last-child { max-width: 620px; margin: 22px 0 0; color: rgba(255,255,255,.66); font-size: 17px; }
.media-list-section { min-height: 600px; }
.media-layout { display: block; }
.media-list { display: grid; gap: 20px; min-width: 0; }
.media-card { display: grid; grid-template-columns: 220px minmax(0, 1fr); min-width: 0; background: white; border: 1px solid var(--line); transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease; }
.media-card:hover { transform: translateY(-3px); border-color: var(--amber); box-shadow: var(--shadow-soft); }
.media-card-mark { min-height: 250px; display: grid; place-items: center; align-content: center; gap: 18px; color: var(--amber-light); background: var(--graphite); }
.media-card-mark svg { width: 72px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.media-card-copy { min-width: 0; padding: 34px 40px; }
.media-meta { display: flex; flex-wrap: wrap; gap: 14px 22px; color: var(--muted); font-size: 13px; }
.media-meta span { color: var(--pine); font-weight: 700; }
.media-card h2 { margin: 17px 0 12px; font-family: var(--font-display); font-size: clamp(24px, 2.5vw, 34px); line-height: 1.42; }
.media-card p { margin: 0; color: var(--muted); }
.media-card .text-link { margin-top: 20px; }

.notice-article { padding: 74px 0 110px; }
.notice-header { padding-bottom: 48px; }
.notice-header .breadcrumb { margin-bottom: 34px; color: var(--muted); }
.notice-header .breadcrumb a:hover { color: var(--pine); }
.notice-header h1 { margin: 0 0 26px; font-family: var(--font-display); font-size: clamp(36px, 5vw, 58px); line-height: 1.28; letter-spacing: -.035em; overflow-wrap: anywhere; }
.notice-meta { display: flex; flex-wrap: wrap; gap: 10px 30px; color: var(--muted); font-size: 13px; }
.notice-document { position: relative; padding: 64px 72px 70px 82px; background: white; border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.notice-document::before { content: ""; position: absolute; left: 34px; top: 0; bottom: 0; width: 4px; background: var(--amber); }
.notice-lead { margin-bottom: 46px; padding: 28px 30px; background: var(--mineral); border-left: 3px solid var(--pine); }
.notice-lead p { margin: 0; font-size: 18px; line-height: 2; }
.notice-document section { padding: 34px 0; border-top: 1px solid var(--line); }
.notice-document section h2 { display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 14px; align-items: center; margin: 0 0 22px; font-family: var(--font-display); font-size: 26px; }
.notice-document section h2 span { width: 36px; height: 36px; display: grid; place-items: center; color: white; background: var(--graphite); font-family: var(--font-body); font-size: 14px; }
.notice-document section p { margin: 0 0 16px; color: #3f4749; line-height: 2; }
.notice-document section p:last-child { margin-bottom: 0; }
.notice-facts { margin: 0 0 24px; border-top: 1px solid var(--line); }
.notice-facts div { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 22px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.notice-facts dt { color: var(--muted); font-size: 13px; }
.notice-facts dd { margin: 0; font-weight: 700; overflow-wrap: anywhere; }
.notice-address { display: grid; gap: 5px; margin-top: 22px; padding: 24px 26px; color: white; background: var(--pine); }
.notice-address span { color: rgba(255,255,255,.67); font-size: 13px; }
.notice-address strong { font-size: 18px; overflow-wrap: anywhere; }
.notice-signature { display: grid; justify-items: end; margin-top: 42px; color: var(--ink); }
.notice-signature p { margin: 0; font-weight: 700; }
.notice-signature time { margin-top: 8px; color: var(--muted); }
.article-back { display: flex; justify-content: center; padding-top: 38px; }

.cluster-section { background: var(--paper); }
.cluster-layout { display: grid; grid-template-columns: minmax(0, .9fr) minmax(440px, 1.1fr); align-items: center; gap: 80px; }
.cluster-copy p:last-child { max-width: 580px; color: var(--muted); }
.cluster-map { position: relative; min-height: 420px; border: 1px solid var(--line); background: linear-gradient(135deg, #fff, var(--mineral)); overflow: hidden; }
.cluster-map svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.cluster-map path { fill: none; stroke: var(--amber); stroke-width: 2; stroke-dasharray: 5 8; }
.map-center, .map-node { position: absolute; z-index: 1; display: grid; place-items: center; text-align: center; border-radius: 50%; }
.map-center { left: 50%; top: 50%; width: 150px; aspect-ratio: 1; transform: translate(-50%, -50%); color: white; background: var(--graphite); box-shadow: var(--shadow-soft); font-weight: 700; }
.map-node { width: 96px; aspect-ratio: 1; color: var(--pine); background: white; border: 1px solid var(--line); font-size: 14px; font-weight: 700; }
.node-one { left: 9%; top: 10%; }
.node-two { left: 10%; bottom: 10%; }
.node-three { right: 8%; top: 38%; }

.about-section { background: var(--mineral); }
.about-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, .82fr); gap: 100px; }
.about-copy > p { color: var(--muted); }
.compliance-note { display: grid; grid-template-columns: 42px minmax(0, 1fr); gap: 16px; margin-top: 38px; padding: 24px; color: white; background: var(--pine); }
.compliance-note svg { width: 36px; fill: none; stroke: var(--amber-light); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.compliance-note p { display: grid; margin: 0; }
.compliance-note span { margin-top: 4px; color: rgba(255,255,255,.68); font-size: 14px; }
.company-file { margin: 0; border-top: 3px solid var(--graphite); background: var(--paper); box-shadow: var(--shadow-soft); }
.company-file div { display: grid; grid-template-columns: 135px minmax(0, 1fr); gap: 20px; padding: 20px 24px; border-bottom: 1px solid var(--line); }
.company-file dt { color: var(--muted); font-size: 13px; }
.company-file dd { margin: 0; font-weight: 700; overflow-wrap: anywhere; }
.company-code { font-family: var(--font-data); letter-spacing: .02em; }

.contact-section { padding: 96px 0; color: white; background: var(--pine); }
.contact-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr); gap: 80px; align-items: center; }
.address-card { min-width: 0; padding: 32px; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.06); }
.address-card > span { display: block; color: var(--amber-light); font-size: 13px; font-weight: 700; letter-spacing: .12em; }
.address-card strong { display: block; margin: 14px 0 24px; font-size: 20px; line-height: 1.6; overflow-wrap: anywhere; }
.button-light { color: var(--graphite); background: white; }
.button-dark { color: white; background: var(--graphite); }
.button-dark:hover { background: var(--pine); }
.copy-status { min-height: 24px; margin: 12px 0 0; color: rgba(255,255,255,.72); font-size: 13px; }

.site-footer { padding: 72px 0 26px; color: rgba(255,255,255,.72); background: #0d1112; }
.brand-footer .brand-copy strong { color: white; }
.brand-footer .brand-copy small { color: rgba(255,255,255,.45); }
.brand-footer .brand-mark path:first-child { stroke: white; }
.footer-grid { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 50px; }
.footer-grid nav { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; }
.footer-grid nav a:hover { color: white; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); font-size: 13px; }

@keyframes hero-enter {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-copy { animation: hero-enter 620ms cubic-bezier(.22,.8,.3,1) both; }
.material-track { animation: hero-enter 620ms 100ms cubic-bezier(.22,.8,.3,1) both; }

@media (max-width: 1040px) {
  :root { --header-height: 76px; }
  .brand-copy small { display: none; }
  .site-nav { gap: 22px; }
  .hero-copy { width: min(650px, 72%); }
  .split-heading { gap: 44px; }
  .business-card { min-height: 390px; padding: 28px; }
  .business-card h3 { margin-top: 54px; }
  .product-card { grid-template-columns: 150px minmax(0, 1fr); padding: 34px; gap: 24px; }
  .product-orb { width: 170px; }
  .cluster-layout, .about-layout { gap: 56px; }
  .product-photo { height: 390px; }
  .media-card { grid-template-columns: 180px minmax(0, 1fr); }
}

@media (max-width: 820px) {
  .shell { width: min(calc(100% - 32px), var(--shell)); }
  .nav-toggle { display: flex; }
  .nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-of-type(2) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-of-type(3) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-of-type(4) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 18px 16px 24px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 38px rgba(21,26,28,.12);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { min-height: 48px; display: flex; align-items: center; padding: 10px 16px; }
  .nav-cta { margin-top: 8px; justify-content: center; }
  .hero { min-height: 760px; }
  .hero-image { object-position: 62% center; }
  .hero-scrim { background: linear-gradient(90deg, rgba(8,12,13,.96), rgba(8,12,13,.72) 68%, rgba(8,12,13,.3)); }
  .hero-inner { min-height: 610px; padding: 70px 0 180px; }
  .hero-copy { width: min(620px, 88%); }
  .material-track { margin-bottom: 16px; padding: 20px; gap: 10px; }
  .track-stage { grid-template-columns: 20px auto; column-gap: 7px; }
  .track-stage .sample-dot { width: 20px; height: 20px; }
  .fact-grid { grid-template-columns: 1fr; }
  .fact { padding: 24px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .fact:last-child { border-right: 0; border-bottom: 0; }
  .section { padding: 90px 0; }
  .split-heading, .path-layout, .cluster-layout, .about-layout, .contact-layout { grid-template-columns: 1fr; gap: 44px; }
  .business-grid { grid-template-columns: 1fr; }
  .business-card { min-height: 320px; }
  .path-intro { position: static; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card { min-height: 340px; }
  .product-gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-photo { height: 360px; }
  .product-photo-wide { grid-column: 1 / -1; height: 460px; }
  .cluster-map { min-height: 380px; }
  .contact-layout { gap: 36px; }
  .news-feature { grid-template-columns: 150px minmax(0, 1fr); }
  .news-date { min-height: 280px; padding: 28px; }
  .news-feature-copy { padding: 36px; }
  .media-hero-inner { min-height: 360px; }
  .media-card { grid-template-columns: 180px minmax(0, 1fr); }
  .notice-document { padding: 54px 50px 60px 64px; }
  .notice-document::before { left: 26px; }
}

@media (max-width: 560px) {
  .brand-mark { width: 38px; height: 38px; }
  .brand-copy strong { font-size: 17px; }
  .hero { min-height: 800px; }
  .hero-image { object-position: 65% center; }
  .hero-scrim { background: linear-gradient(180deg, rgba(8,12,13,.82), rgba(8,12,13,.94) 70%, rgba(8,12,13,.98)); }
  .hero-inner { min-height: 610px; padding: 66px 0 205px; }
  .hero-copy { width: 100%; }
  .hero h1 { font-size: clamp(36px, 8vw, 44px); letter-spacing: -0.07em; }
  .hero-lead { font-size: 16px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; min-height: 50px; }
  .material-track { grid-template-columns: 1fr; gap: 12px; }
  .track-line { width: 1px; height: 15px; margin-left: 10px; background: repeating-linear-gradient(180deg, var(--amber-light) 0 4px, transparent 4px 8px); }
  .track-stage { grid-template-columns: 22px auto; }
  .track-stage .sample-dot { width: 22px; height: 22px; }
  .section-heading { margin-bottom: 36px; }
  .section-heading h2, .section h2, .contact-section h2 { font-size: 36px; }
  .business-card { min-height: 300px; padding: 26px; }
  .business-card h3 { margin-top: 34px; }
  .path-list li { grid-template-columns: 44px minmax(0, 1fr); gap: 14px; }
  .product-card { min-height: 0; grid-template-columns: 1fr; padding: 30px; }
  .product-orb { width: 150px; }
  .product-gallery { grid-template-columns: 1fr; gap: 12px; }
  .product-photo, .product-photo-wide { grid-column: auto; height: auto; aspect-ratio: 4 / 3; }
  .product-photo:not(.product-photo-wide) { aspect-ratio: 4 / 5; }
  .cluster-map { min-height: 340px; }
  .map-center { width: 126px; }
  .map-node { width: 78px; font-size: 12px; }
  .company-file div { grid-template-columns: 1fr; gap: 5px; }
  .address-card { padding: 26px; }
  .footer-grid, .footer-bottom { flex-direction: column; }
  .footer-grid nav { display: grid; grid-template-columns: repeat(2, 1fr); width: 100%; gap: 14px 24px; }
  .news-feature { grid-template-columns: 1fr; }
  .news-date { min-height: 0; display: block; padding: 22px 24px; }
  .news-date time { display: flex; align-items: baseline; gap: 10px; }
  .news-feature-copy { padding: 28px 24px 32px; }
  .section-action { justify-content: stretch; }
  .media-hero-inner { min-height: 320px; padding-block: 50px; }
  .media-hero::after { left: 35%; }
  .media-list-section { min-height: 0; }
  .media-card { grid-template-columns: 1fr; }
  .media-card-mark { min-height: 180px; }
  .media-card-copy { padding: 28px 24px; }
  .notice-article { padding: 52px 0 80px; }
  .notice-header { padding-bottom: 34px; }
  .notice-document { padding: 36px 24px 44px 34px; }
  .notice-document::before { left: 12px; width: 3px; }
  .notice-lead { padding: 22px; }
  .notice-lead p { font-size: 16px; }
  .notice-document section h2 { grid-template-columns: 32px minmax(0, 1fr); font-size: 22px; }
  .notice-document section h2 span { width: 32px; height: 32px; }
  .notice-facts div { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}