:root {
  --paper: #f1e8d8;
  --bone: #fff9ee;
  --ink: #2a1e18;
  --terra: #b64f37;
  --frost: #afc6c6;
  --sage: #7d8c72;
  --line: rgba(42, 30, 24, .22);
  --max: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans CJK SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  font-family: "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -.045em;
}
h2 { font-size: clamp(2.5rem, 6vw, 6rem); }
p { font-size: 1rem; }

.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: 1rem;
  top: -5rem;
  z-index: 1000;
  padding: .7rem 1rem;
  background: var(--bone);
  border: 1px solid var(--ink);
}
.skip-link:focus { top: 1rem; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  min-height: 78px;
  padding: 0 clamp(1.25rem, 4vw, 4.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--bone);
  background: rgba(28, 19, 15, .88);
  border-bottom: 1px solid rgba(255, 249, 238, .18);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: .8rem; }
.brand-mark { width: 42px; height: 42px; color: var(--terra); flex: 0 0 auto; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-mark ellipse, .brand-mark path { fill: none; stroke: currentColor; stroke-width: 1.8; }
.brand-copy { display: grid; line-height: 1.2; }
.brand-copy strong { font-size: .95rem; letter-spacing: .08em; }
.brand-copy small { margin-top: .25rem; font-size: .52rem; letter-spacing: .12em; opacity: .72; }
.site-nav { display: flex; align-items: center; gap: clamp(1.25rem, 2.5vw, 2.5rem); }
.site-nav a { font-size: .78rem; letter-spacing: .12em; white-space: nowrap; }
.site-nav a:not(.nav-contact) { opacity: .76; }
.site-nav a:hover, .site-nav a:focus-visible { opacity: 1; color: #fff; }
.nav-contact { padding: .6rem 1rem; border: 1px solid rgba(255,255,255,.55); }
.menu-toggle { display: none; }

.section-pad { width: min(var(--max), calc(100% - 8vw)); margin: 0 auto; padding: clamp(5rem, 10vw, 10rem) 0; }
.section-index {
  padding-bottom: .9rem;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--ink);
  font-size: .68rem;
  letter-spacing: .18em;
}
.eyebrow { margin-bottom: 1.3rem; font-size: .7rem; letter-spacing: .2em; text-transform: uppercase; }
.light { color: rgba(255, 249, 238, .72); }
.text-link {
  display: inline-flex;
  gap: 1.6rem;
  align-items: center;
  padding-bottom: .45rem;
  border-bottom: 1px solid currentColor;
  font-size: .78rem;
  letter-spacing: .1em;
}
.text-link span { color: var(--terra); transition: transform .25s ease; }
.text-link:hover span { transform: translate(4px, 4px); }
.light-link span { color: var(--frost); }

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--bone);
  background: var(--ink);
}
.hero-image, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-image { object-fit: cover; object-position: center; }
.hero-shade {
  background: linear-gradient(90deg, rgba(20,12,9,.86) 0%, rgba(20,12,9,.53) 36%, rgba(20,12,9,.05) 70%);
}
.hero-copy {
  position: relative;
  z-index: 2;
  width: min(760px, 72vw);
  margin: 0 0 clamp(5rem, 10vh, 8rem) clamp(1.5rem, 7vw, 7rem);
}
.hero h1 { margin-bottom: 2rem; font-size: clamp(3.8rem, 8.6vw, 9.7rem); }
.hero h1 em { color: var(--paper); font-weight: 400; }
.hero-intro { max-width: 590px; margin-bottom: 2.3rem; color: rgba(255,249,238,.78); font-size: clamp(1rem, 1.5vw, 1.25rem); }
.hero-index {
  position: absolute;
  z-index: 2;
  right: clamp(1.5rem, 4vw, 4rem);
  bottom: 2.6rem;
  display: flex;
  align-items: center;
  gap: .8rem;
  color: rgba(255,255,255,.7);
  font-size: .62rem;
  letter-spacing: .16em;
}
.hero-index span { font-family: Georgia, serif; font-size: 2rem; color: var(--frost); }
.hero-index i { width: 64px; height: 1px; background: currentColor; }

.opening { padding-bottom: clamp(7rem, 12vw, 12rem); }
.opening-grid { display: grid; grid-template-columns: 1.2fr .75fr; gap: 8vw; padding-top: 4rem; }
.opening h2 { margin: 0; }
.opening-copy { padding-top: 1rem; }
.opening-copy p:first-child { font-size: 1.3rem; color: var(--terra); }
.opening-copy p + p { margin-top: 2rem; }

.directions { overflow: hidden; }
.directions-heading { padding-top: 0; padding-bottom: 5rem; }
.directions-heading h2 { max-width: 930px; margin: 4rem 0 0; }
.direction {
  min-height: 760px;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: 7vw;
  padding: clamp(4rem, 7vw, 7rem) clamp(1.5rem, 7vw, 7rem);
}
.direction-warm { background: var(--bone); }
.direction-cold { background: #c9d7d5; }
.organic-figure { margin: 0; overflow: hidden; }
.organic-figure img { width: 100%; height: clamp(440px, 57vw, 730px); object-fit: cover; }
.warm-figure { clip-path: polygon(3% 5%, 90% 0, 100% 30%, 88% 97%, 15% 92%, 0 65%); }
.cold-figure { clip-path: ellipse(47% 47% at 52% 50%); }
.direction-copy { max-width: 530px; }
.direction-copy h3 { margin-bottom: 1.8rem; font-size: clamp(2.5rem, 5vw, 5.2rem); }
.direction-copy p:not(.eyebrow) { margin-bottom: 2rem; }

.temperature-band { position: relative; min-height: 54vw; max-height: 760px; color: var(--bone); overflow: hidden; }
.temperature-band img { width: 100%; height: 100%; min-height: 620px; object-fit: cover; }
.temperature-copy {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  text-align: center;
}
.temperature-copy span { font-size: .65rem; letter-spacing: .25em; }
.temperature-copy strong { font-family: "Noto Serif CJK SC", "Songti SC", serif; font-size: clamp(2rem, 5vw, 5.5rem); line-height: 1.12; font-weight: 500; }

.path { padding-bottom: 12rem; }
.path-heading { display: grid; grid-template-columns: 1.25fr .55fr; gap: 8vw; align-items: end; padding-top: 4rem; }
.path-heading h2 { margin: 0; }
.path-heading p { margin-bottom: .7rem; }
.path-visuals { position: relative; min-height: 820px; margin: 6rem 0 4rem; }
.path-visuals figure { margin: 0; position: absolute; overflow: hidden; }
.path-visuals img { width: 100%; height: 100%; object-fit: cover; }
.process-figure { left: 0; top: 0; width: 72%; height: 610px; }
.observation-figure { right: 0; bottom: 0; width: 46%; height: 440px; border: 18px solid var(--paper); }
.path-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.path-list li {
  display: grid;
  grid-template-columns: 80px 1fr 1.6fr;
  gap: 2rem;
  align-items: baseline;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--line);
}
.path-list span { color: var(--terra); font-family: Georgia, serif; font-size: 1.6rem; }
.path-list strong { font-family: "Noto Serif CJK SC", "Songti SC", serif; font-size: 1.5rem; }
.path-list p { margin: 0; color: rgba(42,30,24,.72); }

.frozen-threshold { position: relative; min-height: 690px; color: var(--bone); background: #6d8996; }
.frozen-threshold img { width: 100%; height: 690px; object-fit: cover; }
.frozen-threshold::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(22,35,40,.72), rgba(22,35,40,.05) 65%); }
.frozen-threshold-copy { position: absolute; z-index: 2; left: clamp(1.5rem, 7vw, 7rem); top: 50%; width: min(570px, 65vw); transform: translateY(-50%); }
.frozen-threshold h2 { margin-bottom: 1.5rem; font-size: clamp(2.8rem, 5.5vw, 6rem); }
.frozen-threshold-copy > p:last-child { max-width: 500px; color: rgba(255,249,238,.78); }

.project { background: var(--paper); }
.project-heading { display: grid; grid-template-columns: 1.2fr .55fr; gap: 8vw; align-items: end; padding: 4rem 0 7rem; }
.project-heading h2 { margin: 0; }
.project-scale { display: grid; grid-template-columns: 1fr auto 1fr; gap: 4vw; align-items: center; }
.project-scale > div { display: grid; gap: .7rem; }
.project-scale > div:last-child { text-align: right; }
.project-scale strong { font-family: Georgia, serif; font-size: clamp(6rem, 16vw, 14rem); line-height: .75; font-weight: 400; color: var(--terra); letter-spacing: -.07em; }
.project-scale small { margin-left: .2em; font-size: .12em; letter-spacing: 0; color: var(--ink); }
.project-scale span { font-size: .7rem; letter-spacing: .14em; }
.project-scale i { width: 1px; height: 190px; background: var(--ink); opacity: .35; }
.scale-note { margin: 4rem 0 8rem; padding: 1rem 0; border-block: 1px solid var(--line); text-align: center; font-size: .78rem; letter-spacing: .07em; }
.timeline { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 9vw; padding-top: 3rem; }
.timeline-line { position: absolute; top: 0; left: 0; right: 0; height: 1px; background: var(--ink); }
.timeline-line i { position: absolute; top: -6px; width: 13px; height: 13px; background: var(--terra); border-radius: 50%; }
.timeline-line i:first-child { left: 0; }
.timeline-line i:last-child { left: 52%; }
.timeline time { font-family: Georgia, serif; font-size: clamp(3rem, 7vw, 6rem); color: var(--terra); }
.timeline h3 { margin: 1rem 0; font-size: 1.8rem; }

.about { position: relative; min-height: 760px; color: var(--bone); background: var(--ink); }
.about > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.about-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(30,21,17,.86), rgba(30,21,17,.12)); }
.about-copy { position: relative; z-index: 2; width: min(720px, 78vw); padding: clamp(8rem, 14vw, 13rem) 0 clamp(6rem, 10vw, 9rem) clamp(1.5rem, 7vw, 7rem); }
.about h2 { margin-bottom: 2rem; font-size: clamp(3rem, 6vw, 6.5rem); }
.about-copy > p:not(.eyebrow) { max-width: 600px; color: rgba(255,249,238,.78); font-size: 1.12rem; }
.about dl { margin: 3rem 0 0; border-top: 1px solid rgba(255,255,255,.35); }
.about dl div { display: grid; grid-template-columns: 130px 1fr; gap: 2rem; padding: 1rem 0; border-bottom: 1px solid rgba(255,255,255,.2); }
.about dt { font-size: .68rem; letter-spacing: .12em; color: var(--frost); }
.about dd { margin: 0; }

.contact { padding-bottom: 9rem; }
.contact-grid { display: grid; grid-template-columns: .95fr 1fr; gap: 9vw; padding-top: 5rem; }
.contact-intro h2 { font-size: clamp(2.8rem, 5.8vw, 6rem); }
.contact-intro > p { max-width: 480px; }
.contact address { margin-top: 3rem; font-style: normal; color: var(--terra); }
#inquiry-form { display: grid; gap: 1.6rem; padding-top: .5rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
#inquiry-form label { display: grid; gap: .55rem; font-size: .72rem; letter-spacing: .11em; }
#inquiry-form input, #inquiry-form select, #inquiry-form textarea {
  width: 100%;
  padding: .85rem 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink);
  border-radius: 0;
  outline: 0;
  resize: vertical;
}
#inquiry-form input:focus, #inquiry-form select:focus, #inquiry-form textarea:focus { border-color: var(--terra); box-shadow: 0 2px 0 var(--terra); }
#inquiry-form button {
  justify-self: start;
  min-width: 190px;
  margin-top: 1rem;
  padding: .9rem 1.2rem;
  color: var(--bone);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
}
#inquiry-form button:hover, #inquiry-form button:focus-visible { background: var(--terra); border-color: var(--terra); }
.form-status { min-height: 1.7em; margin: 0; color: var(--terra); font-size: .86rem; }

.site-footer { padding: 5rem clamp(1.5rem, 7vw, 7rem) 2rem; color: var(--bone); background: var(--ink); }
.footer-brand { display: flex; align-items: center; gap: 1rem; font-family: "Noto Serif CJK SC", "Songti SC", serif; font-size: clamp(1.5rem, 3vw, 2.7rem); }
.brand-mark.inverted { color: var(--frost); }
.site-footer > nav { display: flex; gap: 2.5rem; margin: 4rem 0; padding: 1.5rem 0; border-block: 1px solid rgba(255,255,255,.18); }
.site-footer nav a { font-size: .74rem; letter-spacing: .1em; opacity: .7; }
.site-footer nav a:hover { opacity: 1; }
.footer-bottom { display: flex; justify-content: space-between; gap: 2rem; font-size: .64rem; letter-spacing: .09em; color: rgba(255,255,255,.58); }

@media (max-width: 980px) {
  .opening-grid, .path-heading, .project-heading, .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .direction { min-height: 0; grid-template-columns: 1fr 1fr; gap: 4vw; padding-inline: 4vw; }
  .path-visuals { min-height: 660px; }
  .process-figure { width: 78%; height: 500px; }
  .observation-figure { width: 52%; height: 350px; }
  .project-heading { padding-bottom: 5rem; }
}

@media (max-width: 860px) {
  .site-header { min-height: 68px; }
  .brand-mark { width: 36px; height: 36px; }
  .brand-copy small { display: none; }
  .menu-toggle {
    position: relative;
    z-index: 102;
    width: 44px;
    height: 44px;
    display: grid;
    place-content: center;
    gap: 7px;
    color: var(--bone);
    background: transparent;
    border: 0;
    cursor: pointer;
  }
  .menu-toggle > span:not(.sr-only) { width: 25px; height: 1px; background: currentColor; transition: transform .25s ease; }
  .menu-toggle[aria-expanded="true"] > span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
  .site-nav {
    position: fixed;
    inset: 0;
    height: 100dvh;
    z-index: 101;
    padding: 7rem 2rem 3rem;
    display: grid;
    align-content: center;
    gap: 0;
    background: var(--ink);
    transform: translateY(-105%);
    transition: transform .35s ease;
  }
  .menu-open .site-nav { transform: none; }
  .site-nav a {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255,255,255,.18);
    font-family: "Noto Serif CJK SC", "Songti SC", serif;
    font-size: clamp(1.7rem, 7vw, 3rem);
    letter-spacing: 0;
  }
  .nav-contact { border: 0; }
  .hero-copy { width: calc(100% - 3rem); margin-left: 1.5rem; }
  .hero-shade { background: linear-gradient(0deg, rgba(20,12,9,.92), rgba(20,12,9,.04) 75%); }
  .hero-image { object-position: 63% center; }
  .hero-index { display: none; }
  .direction { grid-template-columns: 1fr; padding: 5rem 7vw; }
  .direction-cold .direction-copy { order: 2; }
  .organic-figure img { height: min(95vw, 620px); }
  .temperature-copy { grid-template-columns: 1fr; align-content: center; gap: 2rem; padding: 2rem; }
  .temperature-band img { min-height: 560px; }
  .path-list li { grid-template-columns: 56px 1fr; gap: 1rem; }
  .path-list p { grid-column: 2; }
  .project-scale { gap: 2vw; }
  .project-scale strong { font-size: 18vw; }
  .project-scale i { height: 120px; }
  .timeline { gap: 4vw; }
  .frozen-threshold-copy { width: calc(100% - 3rem); }
}

@media (max-width: 560px) {
  h2 { font-size: clamp(2.3rem, 12vw, 4.2rem); }
  .section-pad { width: calc(100% - 2.5rem); padding-block: 5.5rem; }
  .section-index { font-size: .58rem; }
  .hero { min-height: 860px; }
  .hero-copy { margin-bottom: 4.5rem; }
  .hero h1 { font-size: clamp(3.3rem, 16vw, 5.3rem); }
  .hero-intro { font-size: .96rem; }
  .opening-grid { padding-top: 2.5rem; }
  .opening-copy p:first-child { font-size: 1.1rem; }
  .directions-heading { width: calc(100% - 2.5rem); padding-bottom: 3rem; }
  .directions-heading h2 { margin-top: 2.5rem; }
  .direction { padding: 4.5rem 1.25rem; }
  .direction-copy h3 { font-size: 2.8rem; }
  .organic-figure img { height: 105vw; }
  .temperature-band { min-height: 590px; }
  .temperature-band img { min-height: 590px; object-position: center; }
  .temperature-copy strong { font-size: 2.5rem; }
  .path { padding-bottom: 7rem; }
  .path-visuals { min-height: 580px; margin-top: 4rem; }
  .process-figure { width: 92%; height: 390px; }
  .observation-figure { width: 70%; height: 285px; border-width: 10px; }
  .path-list strong { font-size: 1.25rem; }
  .frozen-threshold, .frozen-threshold img { min-height: 620px; height: 620px; }
  .frozen-threshold img { object-position: 63% center; }
  .frozen-threshold::after { background: linear-gradient(0deg, rgba(22,35,40,.9), rgba(22,35,40,.05) 78%); }
  .frozen-threshold-copy { top: auto; bottom: 3rem; transform: none; }
  .project-heading { padding: 2.5rem 0 4rem; }
  .project-scale { grid-template-columns: 1fr; }
  .project-scale > div:last-child { text-align: left; }
  .project-scale strong { font-size: 38vw; }
  .project-scale i { width: 100%; height: 1px; margin: 1.5rem 0; }
  .scale-note { margin: 3rem 0 6rem; }
  .timeline { grid-template-columns: 1fr; gap: 3.5rem; padding-left: 2rem; }
  .timeline-line { top: 0; bottom: 0; left: 0; right: auto; width: 1px; height: auto; }
  .timeline-line i:first-child { left: -6px; top: 0; }
  .timeline-line i:last-child { left: -6px; top: 56%; }
  .about { min-height: 780px; }
  .about > img { object-position: 62% center; }
  .about-overlay { background: linear-gradient(0deg, rgba(30,21,17,.94), rgba(30,21,17,.08) 76%); }
  .about-copy { width: calc(100% - 2.5rem); padding: 0; position: absolute; left: 1.25rem; bottom: 3rem; }
  .about h2 { font-size: 3rem; }
  .about dl div { grid-template-columns: 96px 1fr; gap: 1rem; }
  .field-row { grid-template-columns: 1fr; }
  .site-footer { padding-inline: 1.25rem; }
  .site-footer > nav { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
  .footer-bottom { flex-direction: column; gap: .5rem; }
}

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