:root {
  --ink: #10100f;
  --ink-soft: #1a1a18;
  --paper: #f3f0e8;
  --paper-strong: #fffdf7;
  --signal: #ff4d18;
  --blue: #4d76ff;
  --muted: #9f9d95;
  --line: rgba(16, 16, 15, 0.18);
  --line-dark: rgba(243, 240, 232, 0.18);
  --max-width: 1440px;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { color: var(--paper-strong); background: var(--signal); }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: .75rem 1rem;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.page-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, transparent calc(100% - 1px), rgba(16,16,15,.045) 1px),
    linear-gradient(to bottom, transparent calc(100% - 1px), rgba(16,16,15,.035) 1px);
  background-size: 8.333vw 8.333vw;
}

.section-shell { width: min(100%, var(--max-width)); margin: 0 auto; padding-inline: var(--gutter); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 0 var(--gutter);
  color: var(--paper-strong);
  border-bottom: 1px solid rgba(255,255,255,.15);
  background: rgba(16,16,15,.82);
  backdrop-filter: blur(18px);
  transition: min-height .25s ease, background-color .25s ease;
}
.site-header.is-scrolled { min-height: 62px; background: rgba(16,16,15,.96); }
.wordmark { display: inline-flex; align-items: center; gap: .65rem; font-weight: 900; letter-spacing: .12em; text-decoration: none; }
.wordmark-dot { width: .7rem; height: .7rem; display: inline-block; background: var(--signal); border-radius: 50%; box-shadow: 0 0 0 4px rgba(255,77,24,.15); }
.site-nav { display: flex; align-items: center; gap: 2rem; font-size: .88rem; font-weight: 700; }
.site-nav a { text-decoration: none; }
.site-nav a:not(.nav-cta) { color: #c9c7c0; }
.site-nav a:hover { color: var(--paper-strong); }
.nav-cta { padding: .72rem 1rem; color: var(--ink); background: var(--paper-strong); }
.menu-button { display: none; }

.hero {
  position: relative;
  min-height: 100svh;
  padding-top: clamp(9rem, 14vw, 13.5rem);
  padding-bottom: 4rem;
  color: var(--paper-strong);
  background: var(--ink);
  overflow: hidden;
}
.hero::before { content: "M"; position: absolute; right: -2vw; bottom: -14vw; color: rgba(255,255,255,.025); font: 900 min(54vw, 48rem)/.8 var(--display); pointer-events: none; }
.hero-copy { position: relative; z-index: 2; width: min(62rem, 72%); }
.eyebrow { display: flex; gap: 1.25rem; margin: 0 0 1.6rem; color: #aaa89f; font-size: .73rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow span + span::before { content: "/"; margin-right: 1.25rem; color: var(--signal); }
.hero h1 { max-width: 12ch; margin: 0; font: 900 clamp(4.2rem, 8.3vw, 8.8rem)/.88 var(--display); letter-spacing: -.065em; }
.hero h1 .accent { display: inline-block; color: var(--signal); transform: rotate(-2deg); }
.hero-intro { max-width: 44rem; margin: 2.4rem 0 0; color: #c5c3bc; font-size: clamp(1rem, 1.4vw, 1.28rem); line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.4rem; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 2.4rem; min-width: 12rem; padding: 1rem 1.15rem; border: 1px solid rgba(255,255,255,.2); font-size: .88rem; font-weight: 800; text-decoration: none; transition: transform .2s ease, background-color .2s ease, color .2s ease; }
.button:hover { transform: translateY(-3px); }
.button-primary { color: var(--paper-strong); background: var(--signal); border-color: var(--signal); }
.button-quiet { color: var(--paper-strong); }
.button-quiet:hover { color: var(--ink); background: var(--paper-strong); }
.hero-visual { position: absolute; right: -5%; top: 16%; width: min(48vw, 47rem); opacity: .88; mix-blend-mode: normal; }
.hero-visual img { width: 100%; filter: drop-shadow(0 2rem 5rem rgba(0,0,0,.45)); }
.hero-stamp { position: absolute; right: 9%; bottom: 1%; width: 6rem; aspect-ratio: 1; display: grid; place-content: center; text-align: center; color: var(--ink); background: var(--paper-strong); border: 8px solid var(--signal); transform: rotate(7deg); }
.hero-stamp span { font-size: .52rem; font-weight: 900; letter-spacing: .18em; }
.hero-stamp strong { font-size: 1.8rem; line-height: 1; }
.hero-note { position: absolute; left: var(--gutter); right: var(--gutter); bottom: 2rem; display: flex; align-items: center; gap: .8rem; color: #aaa89f; font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.status-light { width: .55rem; height: .55rem; border-radius: 50%; background: #65d892; box-shadow: 0 0 1rem rgba(101,216,146,.6); }
.note-rule { flex: 1; height: 1px; background: rgba(255,255,255,.15); }

.work-section { padding-block: clamp(6rem, 10vw, 10rem); }
.section-heading { display: grid; grid-template-columns: minmax(12rem, .45fr) 1.2fr .7fr; gap: 2rem; align-items: end; padding-bottom: 3rem; border-bottom: 1px solid var(--ink); }
.section-index { margin: 0; font-size: .7rem; font-weight: 900; letter-spacing: .14em; }
.section-heading h2 { max-width: 12ch; margin: 0; font: 900 clamp(2.8rem, 5vw, 5.6rem)/.94 var(--display); letter-spacing: -.05em; }
.section-heading > p:last-child { margin: 0; color: #62615c; line-height: 1.75; }

.featured-project { display: grid; grid-template-columns: .18fr 1.15fr .72fr; gap: clamp(1.5rem, 4vw, 4rem); padding: clamp(3rem, 6vw, 6rem) 0; border-bottom: 1px solid var(--line); }
.project-number { font: 800 .75rem/1 var(--body); }
.project-meta, .card-topline { display: flex; justify-content: space-between; gap: 1rem; color: #6d6b65; font-size: .68rem; font-weight: 900; letter-spacing: .12em; }
.project-main h3 { margin: 1rem 0 .4rem; font: 900 clamp(3.5rem, 7vw, 7.4rem)/.9 var(--display); letter-spacing: -.06em; }
.project-main p { max-width: 48rem; color: #54534e; font-size: 1.02rem; line-height: 1.8; }
.project-main .project-lead { margin: 1rem 0; color: var(--ink); font-size: clamp(1.25rem, 2vw, 1.8rem); font-weight: 750; }
.tag-list { display: flex; flex-wrap: wrap; gap: .5rem; margin: 2rem 0 0; padding: 0; list-style: none; }
.tag-list li { padding: .58rem .72rem; border: 1px solid var(--ink); font-size: .72rem; font-weight: 800; }
.project-link { display: inline-flex; align-items: center; gap: .75rem; margin-top: 1.6rem; padding-bottom: .35rem; border-bottom: 2px solid var(--signal); font-weight: 850; text-decoration: none; }
.project-link span { color: var(--signal); transition: transform .2s ease; }
.project-link:hover span { transform: translateX(4px); }
.project-aside { align-self: end; padding: 1.5rem; color: var(--paper-strong); background: var(--ink); }
.project-aside > p { margin: 0 0 1.6rem; color: #a9a79f; font-size: .68rem; font-weight: 900; letter-spacing: .12em; }
.project-aside ol { display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; }
.project-aside li { display: flex; gap: .9rem; padding-top: 1rem; border-top: 1px solid var(--line-dark); font-weight: 700; }
.project-aside li span { color: var(--signal); font-size: .7rem; }
.project-grid { display: grid; grid-template-columns: 1fr 1fr; margin-top: 2.5rem; }
.project-card { position: relative; min-height: 25rem; padding: clamp(1.5rem, 3vw, 3rem); border: 1px solid var(--ink); overflow: hidden; }
.project-card + .project-card { border-left: 0; }
.project-card-dark { color: var(--paper-strong); background: var(--ink-soft); }
.project-card-light { background: var(--paper-strong); }
.project-card h3 { max-width: 9ch; margin: 6rem 0 1rem; font: 900 clamp(2.3rem, 4vw, 4.2rem)/.95 var(--display); letter-spacing: -.045em; }
.project-card p { max-width: 32rem; line-height: 1.75; opacity: .7; }
.card-mark { position: absolute; right: 1.8rem; bottom: 1rem; color: var(--signal); font: 900 clamp(4.5rem, 9vw, 9rem)/1 var(--display); letter-spacing: -.08em; opacity: .9; }
.project-card-light .card-mark { color: var(--blue); }

.approach-section { width: 100%; max-width: none; padding-block: clamp(6rem, 10vw, 10rem); color: var(--paper-strong); background: var(--signal); }
.approach-section > * { width: min(100%, calc(var(--max-width) - (2 * var(--gutter)))); margin-inline: auto; }
.section-heading.inverse { grid-template-columns: .45fr 1.9fr; border-color: rgba(255,255,255,.65); }
.section-heading.inverse h2 { max-width: 11ch; }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); }
.principles article { min-height: 25rem; padding: 2.5rem 2rem 2rem 0; border-right: 1px solid rgba(255,255,255,.35); }
.principles article + article { padding-left: 2rem; }
.principles article:last-child { border-right: 0; }
.principle-index { display: grid; place-items: center; width: 2rem; height: 2rem; border: 1px solid currentColor; border-radius: 50%; font-size: .7rem; font-weight: 900; }
.principles h3 { margin: 8rem 0 1rem; font: 850 clamp(1.7rem, 2.5vw, 2.6rem)/1 var(--display); }
.principles p { max-width: 24rem; margin: 0; color: rgba(255,255,255,.78); line-height: 1.8; }

.about-section { display: grid; grid-template-columns: .35fr 1fr; gap: 3rem; padding-block: clamp(7rem, 12vw, 13rem); }
.about-label { display: flex; align-items: flex-start; gap: 1rem; font-size: .7rem; font-weight: 900; letter-spacing: .13em; }
.about-label span:first-child { color: var(--signal); }
.about-copy h2 { margin: 0; font: 900 clamp(4rem, 8vw, 9rem)/.87 var(--display); letter-spacing: -.065em; }
.about-copy > p { max-width: 48rem; margin: 2.5rem 0 4rem; color: #55544f; font-size: clamp(1.05rem, 1.5vw, 1.3rem); line-height: 1.9; }
.contact-link { display: flex; justify-content: space-between; align-items: center; padding: 1.4rem 0; border-block: 2px solid var(--ink); font: 850 clamp(1.2rem, 2vw, 1.8rem)/1 var(--display); text-decoration: none; }
.contact-link span:last-child { color: var(--signal); font-size: 2rem; transition: transform .2s ease; }
.contact-link:hover span:last-child { transform: translate(4px, -4px); }

.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: 2rem; align-items: center; padding-block: 2rem; color: #a8a69e; background: var(--ink); font-size: .75rem; }
.site-footer::before { content: ""; position: absolute; left: 0; right: 0; height: 100%; z-index: -1; background: var(--ink); }
.site-footer { position: relative; z-index: 1; }
.footer-brand { display: flex; align-items: center; gap: .65rem; color: var(--paper-strong); letter-spacing: .12em; }
.footer-links { display: flex; justify-content: flex-end; gap: 1.2rem; }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--paper-strong); }

.js [data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.js [data-reveal].is-visible { opacity: 1; transform: translateY(0); }
[data-delay="1"] { transition-delay: .12s; }
[data-delay="2"] { transition-delay: .24s; }

@media (max-width: 980px) {
  .hero-copy { width: 100%; }
  .hero-visual { right: -20%; top: 24%; width: 65vw; opacity: .36; }
  .section-heading { grid-template-columns: 1fr 2fr; }
  .section-heading > p:last-child { grid-column: 2; }
  .featured-project { grid-template-columns: .15fr 1fr; }
  .project-aside { grid-column: 2; }
  .about-section { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root { --gutter: 1.2rem; }
  .page-grid { background-size: 25vw 25vw; }
  .site-header { min-height: 64px; }
  .menu-button { display: flex; align-items: center; gap: .7rem; border: 0; color: var(--paper-strong); background: transparent; font: 800 .8rem/1 var(--body); }
  .menu-icon, .menu-icon::after { display: block; width: 1.3rem; height: 1px; background: currentColor; transition: transform .2s ease; }
  .menu-icon::after { content: ""; transform: translateY(5px); }
  .menu-button[aria-expanded="true"] .menu-icon { transform: translateY(3px) rotate(45deg); }
  .menu-button[aria-expanded="true"] .menu-icon::after { transform: rotate(-90deg); }
  .site-nav { position: absolute; left: 0; right: 0; top: 100%; display: none; align-items: stretch; padding: 1rem var(--gutter) 1.5rem; background: var(--ink); border-top: 1px solid var(--line-dark); }
  .site-nav.is-open { display: grid; gap: 0; }
  .site-nav a { padding: 1rem 0; border-bottom: 1px solid var(--line-dark); }
  .site-nav .nav-cta { margin-top: 1rem; padding-inline: 1rem; border-bottom: 0; text-align: center; }
  .hero { min-height: auto; padding-top: 8.5rem; padding-bottom: 7rem; }
  .hero h1 { font-size: clamp(3.5rem, 17vw, 5.6rem); }
  .hero-visual { right: -34%; top: 29%; width: 100vw; }
  .hero-stamp { display: none; }
  .hero-intro { font-size: 1rem; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .hero-note { bottom: 1.5rem; }
  .section-heading, .section-heading.inverse { grid-template-columns: 1fr; gap: 1.3rem; }
  .section-heading > p:last-child { grid-column: auto; }
  .featured-project { grid-template-columns: 1fr; }
  .project-number { color: var(--signal); }
  .project-aside { grid-column: auto; }
  .project-grid { grid-template-columns: 1fr; }
  .project-card + .project-card { border-left: 1px solid var(--ink); border-top: 0; }
  .project-card { min-height: 23rem; }
  .principles { grid-template-columns: 1fr; }
  .principles article, .principles article + article { min-height: auto; padding: 2.5rem 0 3rem; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.35); }
  .principles article:last-child { border-bottom: 0; }
  .principles h3 { margin-top: 3.5rem; }
  .about-copy h2 { font-size: clamp(3.8rem, 19vw, 6rem); }
  .site-footer { grid-template-columns: 1fr; text-align: left; }
  .site-footer p { margin: 0; }
  .footer-links { justify-content: flex-start; flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}