:root {
  --yellow: #ffe17c;
  --ink: #171e19;
  --gray: #b7c6c2;
  --white: #ffffff;
  --paper: #f4f4f5;
  --black: #000000;
  --border: 2px solid var(--black);
  --shadow: 8px 8px 0 var(--black);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif; line-height: 1.55; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }
a { color: inherit; text-decoration: none; }
figure, p, h1, h2, dl, dd { margin: 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 99; padding: 10px 16px; background: var(--white); border: var(--border); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 20; min-height: 74px; display: flex; align-items: stretch; justify-content: space-between; color: var(--white); background: var(--ink); border-bottom: var(--border); }
.brand { display: flex; align-items: center; gap: 14px; padding: 12px 32px; font-weight: 900; letter-spacing: -.03em; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; color: var(--ink); background: var(--yellow); border: 2px solid var(--white); font-size: 13px; letter-spacing: -.05em; }
nav { display: flex; align-items: stretch; }
nav a { display: grid; place-items: center; padding: 0 20px; font-size: 14px; font-weight: 700; border-left: 1px solid var(--black); }
nav a:hover, nav a:focus-visible { color: var(--yellow); }
nav .nav-cta { color: var(--ink); background: var(--yellow); border-left: var(--border); }
nav .nav-cta:hover, nav .nav-cta:focus-visible { color: var(--ink); background: var(--white); }
.mobile-nav { display: none; }

.hero { min-height: 720px; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr); background: var(--yellow); border-bottom: var(--border); }
.hero-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(48px, 7vw, 108px); border-right: var(--border); }
.eyebrow, .kicker { font-size: 12px; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 26px; }
.eyebrow span { padding: 5px 9px; color: var(--yellow); background: var(--ink); border: 2px solid var(--ink); }
h1 { max-width: 760px; font-size: clamp(52px, 6vw, 92px); line-height: .98; letter-spacing: -.075em; font-weight: 950; }
.hero-location { margin-top: 25px; padding-top: 18px; max-width: 220px; border-top: 8px solid var(--ink); font-weight: 800; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 48px; min-width: 220px; padding: 17px 20px; border: var(--border); border-radius: 0; font-weight: 900; box-shadow: 6px 6px 0 var(--black); }
.button-dark { color: var(--yellow); background: var(--ink); }
.button:hover, .button:focus-visible { transform: translate(3px, 3px); box-shadow: 3px 3px 0 var(--black); }
.text-link { font-weight: 800; border-bottom: 2px solid var(--ink); }
.hero-media { position: relative; min-height: 720px; overflow: hidden; background: var(--ink); }
.hero-media img { filter: saturate(.85) contrast(1.06); }

.section { padding: 92px clamp(28px, 6vw, 92px); border-bottom: var(--border); }
.section-heading { display: flex; align-items: flex-end; gap: 22px; margin-bottom: 44px; padding-bottom: 20px; border-bottom: var(--border); }
.section-number { display: block; font-size: clamp(58px, 7vw, 94px); line-height: .78; letter-spacing: -.08em; font-weight: 300; color: transparent; -webkit-text-stroke: 2px currentColor; }
.section-heading h2, .split-copy h2, .contact h2 { font-size: clamp(32px, 4vw, 58px); line-height: 1; letter-spacing: -.055em; }
.section-heading .kicker { margin-bottom: 10px; }
.business-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.info-card { min-height: 210px; padding: 24px; background: var(--white); border: var(--border); box-shadow: var(--shadow); }
.info-card span { display: block; margin-bottom: 36px; color: var(--ink); font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.info-card strong { display: block; font-size: 21px; }
.info-card p { margin-top: 12px; font-size: 13px; }
.material-gallery { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; margin-top: 52px; }
.material-gallery figure { position: relative; height: 420px; border: var(--border); overflow: hidden; }

.split-section { min-height: 620px; display: grid; grid-template-columns: .8fr 1.2fr; border-bottom: var(--border); }
.split-section.reverse { grid-template-columns: 1.2fr .8fr; }
.split-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(48px, 7vw, 100px); background: var(--paper); }
.split-copy .section-number { margin-bottom: 28px; }
.split-copy .kicker { margin-bottom: 16px; }
.split-copy h2 { margin-bottom: 28px; }
.split-copy p { max-width: 520px; }
.split-media { position: relative; min-height: 620px; border-left: var(--border); overflow: hidden; }
.reverse .split-media { border-left: 0; border-right: var(--border); }
.dark { color: var(--white); background: var(--ink); }
.dark .split-copy { background: var(--ink); }
.dark .section-number { -webkit-text-stroke-color: var(--white); }

.development { padding: 92px clamp(28px, 6vw, 92px); background: var(--yellow); border-bottom: var(--border); }
.section-heading.compact { margin-bottom: 32px; }
.evidence-card { display: grid; grid-template-columns: 100px 1fr; align-items: center; padding: 30px; color: var(--yellow); background: var(--ink); border: var(--border); box-shadow: 10px 10px 0 var(--white); }
.evidence-icon { display: grid; place-items: center; width: 62px; height: 62px; border: 2px solid var(--yellow); font-size: 30px; }
.evidence-card p { color: var(--white); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.evidence-card strong { display: block; margin-top: 8px; font-size: clamp(23px, 3vw, 42px); line-height: 1.25; }
.evidence-note { display: grid; grid-template-columns: 260px 1fr; gap: 30px; align-items: center; margin-top: 52px; padding: 24px; background: var(--white); border: var(--border); }
.evidence-note figure { position: relative; height: 160px; }
.evidence-note img { height: 160px; border: var(--border); }
.evidence-note p { font-size: 16px; }

.about { display: grid; grid-template-columns: 1fr 1fr; border-bottom: var(--border); }
.about-copy { padding: 92px clamp(28px, 6vw, 92px); background: var(--gray); }
.about dl { border-top: var(--border); }
.about dl div { display: grid; grid-template-columns: 130px 1fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--black); }
.about dt { font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.about dd { font-weight: 800; }
.about-media { position: relative; min-height: 680px; border-left: var(--border); overflow: hidden; }

.contact { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(30px, 7vw, 120px); padding: 92px clamp(28px, 6vw, 92px); color: var(--white); background: var(--ink); border-bottom: var(--border); }
.contact .section-number { margin-bottom: 24px; -webkit-text-stroke-color: var(--white); }
.contact .kicker { color: var(--yellow); margin-bottom: 12px; }
.contact h2 { margin-bottom: 24px; color: var(--yellow); }
.contact-panel { display: grid; grid-template-columns: 150px 1fr; align-content: center; border-top: 1px solid var(--gray); }
.contact-panel p, .contact-panel strong { padding: 18px 0; border-bottom: 1px solid var(--gray); }
.contact-panel p { color: var(--gray); }

footer { display: grid; grid-template-columns: 1fr 1.5fr; gap: 30px; padding: 32px clamp(28px, 6vw, 92px); color: var(--white); background: var(--black); font-size: 12px; }
footer div { display: flex; flex-wrap: wrap; gap: 16px 30px; align-items: center; }
footer strong { font-size: 17px; }
footer p { color: var(--gray); }

@media (max-width: 1000px) {
  .site-header nav { display: none; }
  .mobile-nav { position: relative; display: block; align-self: center; margin-right: 14px; }
  .mobile-nav summary { padding: 9px 12px; color: var(--white); border: 1px solid var(--white); font-size: 13px; list-style: none; cursor: pointer; }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .mobile-nav div { position: absolute; top: calc(100% + 12px); right: 0; min-width: 180px; padding: 8px 18px; color: var(--ink); background: var(--paper); border: var(--border); box-shadow: 8px 8px 0 var(--black); }
  .mobile-nav a { display: block; padding: 11px 0; border-bottom: 1px solid var(--black); font-size: 13px; font-weight: 700; }
  .mobile-nav a:last-child { border-bottom: 0; }
  .hero, .about { grid-template-columns: 1fr; }
  .hero-copy { border-right: 0; border-bottom: var(--border); }
  .hero-media { min-height: 520px; }
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .split-section, .split-section.reverse { grid-template-columns: 1fr; }
  .split-section .split-copy { order: 1; }
  .split-section .split-media { order: 2; border: 0; border-top: var(--border); }
  .reverse .split-media { order: 2; border: 0; border-top: var(--border); }
  .about-media { min-height: 520px; border-left: 0; border-top: var(--border); }
}

@media (max-width: 640px) {
  .site-header { min-height: 64px; }
  .brand { min-width: 0; padding: 10px 14px; font-size: 13px; }
  .brand-mark { flex: 0 0 36px; width: 36px; height: 36px; }
  .hero { min-height: auto; }
  .hero-copy { padding: 52px 20px; }
  h1 { font-size: clamp(44px, 13vw, 62px); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .button { min-width: 210px; }
  .hero-media { min-height: 400px; }
  .section, .development, .about-copy, .contact { padding: 64px 20px; }
  .section-heading { align-items: flex-start; }
  .section-number { font-size: 64px; }
  .business-grid, .material-gallery { grid-template-columns: 1fr; }
  .info-card { min-height: 185px; }
  .material-gallery figure { height: 280px; }
  .split-section { min-height: auto; }
  .split-copy { padding: 64px 20px; }
  .split-media { min-height: 360px; }
  .evidence-card { grid-template-columns: 1fr; gap: 20px; padding: 22px; box-shadow: 6px 6px 0 var(--white); }
  .evidence-card strong { font-size: 22px; }
  .evidence-note { grid-template-columns: 1fr; }
  .evidence-note figure { height: 200px; }
  .evidence-note img { height: 200px; }
  .about dl div { grid-template-columns: 100px 1fr; }
  .about-media { min-height: 380px; }
  .contact { grid-template-columns: 1fr; }
  .contact-panel { grid-template-columns: 110px 1fr; }
  footer { grid-template-columns: 1fr; padding: 28px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}