:root {
  --paper: #f3ede4;
  --paper-deep: #e4d8c9;
  --ink: #1d2228;
  --navy: #172b40;
  --vermilion: #a7432a;
  --moss: #68765e;
  --line: #b7aa9a;
  --white: #fffdf8;
  --max: 1440px;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --display: "Noto Serif SC", "Songti SC", "STSong", serif;
  --body: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --meta: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); color: var(--ink); font-family: var(--body); font-size: 16px; line-height: 1.65; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--vermilion); outline-offset: 4px; }

.skip-link { position: fixed; top: -4rem; left: 1rem; z-index: 20; padding: .75rem 1rem; background: var(--vermilion); color: var(--white); }
.skip-link:focus { top: 1rem; }

.site-header { position: sticky; top: 0; z-index: 10; display: grid; grid-template-columns: minmax(14rem, 1fr) auto minmax(14rem, 1fr); align-items: center; gap: 2rem; min-height: 76px; padding: .75rem var(--gutter); border-bottom: 1px solid rgba(29,34,40,.35); background: rgba(243,237,228,.97); }
.brand { display: inline-flex; align-items: center; gap: .8rem; width: fit-content; }
.brand img { flex: 0 0 auto; width: 48px; height: 48px; }
.brand-copy { display: grid; gap: .1rem; }
.brand-copy strong { font-size: .92rem; line-height: 1.25; letter-spacing: .03em; }
.brand-copy small { color: #53606a; font-family: var(--meta); font-size: .58rem; letter-spacing: .12em; line-height: 1.2; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: clamp(1.25rem, 3vw, 3rem); font-size: .8rem; }
.desktop-nav a, .header-cta, .text-link { transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease; }
.desktop-nav a { border-bottom: 1px solid transparent; padding: .45rem 0; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--vermilion); border-color: currentColor; }
.header-cta { justify-self: end; display: inline-flex; align-items: center; gap: .7rem; min-height: 44px; padding: .55rem 1rem; border: 1px solid var(--navy); font-size: .78rem; }
.header-cta span { color: var(--vermilion); font-size: 1.1rem; }
.header-cta:hover, .header-cta:focus-visible { background: var(--navy); color: var(--white); }
.menu-toggle { display: none; justify-self: end; width: 46px; height: 46px; padding: .7rem; border: 1px solid var(--navy); background: transparent; color: var(--navy); cursor: pointer; }
.menu-toggle span { display: block; height: 1px; margin: .35rem 0; background: currentColor; transition: transform 180ms ease; }

.mobile-menu { position: fixed; inset: 0; z-index: 12; display: flex; flex-direction: column; padding: 1.25rem var(--gutter) 2rem; background: var(--navy); color: var(--white); transform: translateX(100%); visibility: hidden; transition: transform 300ms cubic-bezier(.22,.61,.36,1), visibility 0s linear 300ms; }
.js .mobile-menu { pointer-events: none; }
.mobile-menu.is-open { transform: translateX(0); visibility: visible; transition-delay: 0s; pointer-events: auto; }
.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 1.5rem; border-bottom: 1px solid rgba(255,253,248,.4); font-family: var(--meta); font-size: .7rem; letter-spacing: .14em; }
.menu-close { min-width: 72px; min-height: 44px; padding: .5rem .75rem; border: 1px solid rgba(255,253,248,.75); background: transparent; color: var(--white); cursor: pointer; }
.menu-close:hover, .menu-close:focus-visible { background: var(--white); color: var(--navy); }
.mobile-menu nav { display: grid; margin-top: 2rem; }
.mobile-menu nav a { display: flex; justify-content: space-between; align-items: center; min-height: 72px; border-bottom: 1px solid rgba(255,253,248,.35); font-family: var(--display); font-size: clamp(1.6rem, 7vw, 2.4rem); line-height: 1.1; }
.mobile-menu nav a span { color: var(--vermilion); font-family: var(--meta); font-size: .65rem; letter-spacing: .12em; }
.mobile-menu nav a:hover, .mobile-menu nav a:focus-visible { color: #f2b19b; }
.mobile-menu > p { margin-top: auto; color: #d7c6b4; font-family: var(--meta); font-size: .68rem; letter-spacing: .12em; }

main { overflow: hidden; }
section { position: relative; }
.hero { display: grid; grid-template-columns: minmax(18rem, .75fr) minmax(0, 1.25fr); gap: clamp(2rem, 7vw, 7rem); align-items: end; min-height: min(900px, calc(100vh - 76px)); max-width: var(--max); margin: 0 auto; padding: clamp(4rem, 9vw, 9rem) var(--gutter) clamp(3.5rem, 7vw, 7rem); }
.hero-copy { position: relative; z-index: 1; max-width: 34rem; }
.hero h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--display); font-weight: 500; }
.hero h1 { max-width: 7ch; margin-bottom: 2.25rem; color: var(--navy); font-size: clamp(3.6rem, 7vw, 6rem); letter-spacing: -.04em; line-height: .98; }
.hero h1 em, h2 em { color: var(--vermilion); font-style: normal; }
.hero h1 span { color: var(--ink); }
.hero-lead { max-width: 34rem; margin-bottom: 2.25rem; color: #454f58; font-size: 1.04rem; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 1.1rem; min-height: 50px; padding: .75rem 1.25rem; border: 1px solid transparent; cursor: pointer; }
.button span { color: var(--vermilion); font-size: 1.2rem; transition: transform 180ms ease; }
.button:hover span, .button:focus-visible span { transform: translateX(4px); }
.button-dark { background: var(--navy); color: var(--white); }
.button-dark:hover, .button-dark:focus-visible { background: var(--ink); }
.text-link { display: inline-flex; align-items: center; gap: .6rem; min-height: 44px; border-bottom: 1px solid var(--vermilion); color: var(--navy); font-size: .86rem; }
.text-link span { color: var(--vermilion); font-size: 1.1rem; }
.text-link:hover, .text-link:focus-visible { color: var(--vermilion); }
.hero-figure { position: relative; z-index: 1; margin: 0; }
.hero-figure img { width: 100%; aspect-ratio: 1.5; object-fit: cover; }
figure figcaption { display: flex; justify-content: space-between; gap: 1rem; margin-top: .65rem; color: #60676d; font-family: var(--meta); font-size: .62rem; letter-spacing: .06em; line-height: 1.4; }
figure figcaption span { color: var(--vermilion); }
.cut-route { position: absolute; pointer-events: none; fill: none; stroke: var(--vermilion); stroke-width: 1.2; opacity: .65; }
.cut-route path { stroke-dasharray: 1250; stroke-dashoffset: 1250; }
.js .cut-route path { animation: draw-route 2.6s cubic-bezier(.22,.61,.36,1) .35s forwards; }
@keyframes draw-route { to { stroke-dashoffset: 0; } }
.cut-route-hero { top: 0; right: clamp(2rem, 9vw, 9rem); width: 15%; height: 100%; }

.section-paper { background: var(--paper); }
.section-sand { background: var(--paper-deep); }
.section-navy { background: var(--navy); color: var(--white); }
.materials, .direction, .rhythm, .timeline, .inquiry { max-width: var(--max); margin: 0 auto; padding: clamp(5rem, 11vw, 11rem) var(--gutter); }
h2 { margin-bottom: 1.5rem; color: var(--navy); font-size: clamp(2.9rem, 5.6vw, 5.6rem); letter-spacing: -.045em; line-height: .98; }
.section-navy h2 { color: var(--white); }
.section-intro, .direction-head { max-width: 32rem; }
.section-intro > p:last-child, .direction-head > p:last-child, .project-head > p:last-child, .rhythm-copy > p:not(.section-kicker), .inquiry-copy > p:not(.section-kicker) { max-width: 32rem; color: #53606a; }
.section-navy .project-head > p:last-child { color: #d9d4cb; }
.material-spread { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(11rem, .55fr); grid-template-rows: auto auto; gap: clamp(2rem, 6vw, 6rem) clamp(2rem, 6vw, 7rem); align-items: end; margin-top: clamp(4rem, 9vw, 9rem); }
.material-main { margin: 0; }
.material-main img { width: 100%; aspect-ratio: 1.5; object-fit: cover; }
.material-small { margin: 0 0 1rem; }
.material-small img { width: 100%; aspect-ratio: .85; object-fit: cover; }
.material-note { align-self: center; max-width: 15rem; color: var(--moss); font-family: var(--display); font-size: 1.45rem; line-height: 1.3; }
.line-mark { display: block; width: 5rem; height: 1px; margin-bottom: 1rem; background: var(--vermilion); }

.direction-head { margin-left: auto; margin-right: 9%; }
.direction-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 4rem); margin: clamp(4rem, 8vw, 8rem) 0 clamp(4rem, 7vw, 7rem); }
.direction-item { min-height: 13rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.direction-item-offset { margin-top: 5rem; }
.item-index { color: var(--vermilion); font-family: var(--meta); font-size: .68rem; letter-spacing: .18em; }
.direction-item h3 { margin: 1.5rem 0 .7rem; color: var(--navy); font-size: 2rem; line-height: 1; }
.direction-item p { max-width: 17rem; margin-bottom: 0; color: #58626a; }
.cut-table-image { width: min(74%, 900px); margin: 0; }
.cut-table-image img { width: 100%; aspect-ratio: 1.5; object-fit: cover; }

.project { padding: clamp(5rem, 10vw, 10rem) var(--gutter); }
.project-head { display: grid; grid-template-columns: minmax(14rem, .8fr) minmax(18rem, .7fr); gap: 2rem; max-width: var(--max); margin: 0 auto clamp(3rem, 7vw, 7rem); }
.project-head h2 { grid-column: 1; margin-bottom: 0; }
.project-head > p { grid-column: 2; align-self: end; margin-bottom: .4rem; }
.project-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(12rem, .65fr); align-items: end; gap: clamp(2rem, 6vw, 6rem); max-width: var(--max); margin: 0 auto; }
.project-ledger { padding: clamp(1.25rem, 3vw, 3rem); border: 1px solid rgba(255,253,248,.5); }
.ledger-title { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid rgba(255,253,248,.4); color: #e6d8c8; font-family: var(--meta); font-size: .65rem; letter-spacing: .08em; }
.project-ledger h3 { max-width: 18ch; margin: 2rem 0 2.5rem; color: var(--white); font-size: clamp(1.55rem, 3vw, 2.5rem); line-height: 1.15; }
.fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; }
.fact-grid div { min-height: 5.2rem; padding: .8rem .7rem; border-top: 1px solid rgba(255,253,248,.22); border-right: 1px solid rgba(255,253,248,.22); }
.fact-grid div:nth-child(4n) { border-right: 0; }
.fact-grid dt { margin-bottom: .35rem; color: #b9c4c9; font-family: var(--meta); font-size: .62rem; letter-spacing: .05em; }
.fact-grid dd { margin: 0; color: var(--white); font-size: .83rem; line-height: 1.45; }
.ledger-note { margin: 1.5rem 0 0; color: #f1b8a5; font-size: .78rem; }
.project-image { margin: 0 0 0 auto; }
.project-image img { width: 100%; aspect-ratio: .95; object-fit: cover; }
.section-navy figure figcaption { color: #b9c4c9; }

.rhythm { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(16rem, .7fr); gap: clamp(2rem, 9vw, 9rem); align-items: center; }
.rhythm-image { margin-left: calc(var(--gutter) * -1); }
.rhythm-image img { width: min(100%, 750px); aspect-ratio: 1.5; object-fit: cover; }
.rhythm-copy { max-width: 27rem; }
.rhythm-copy h2 { margin-bottom: 2rem; }
.rhythm-copy .text-link { margin-top: 1.3rem; }

.timeline { display: grid; grid-template-columns: minmax(14rem, .55fr) minmax(0, 1.25fr); gap: clamp(2rem, 7vw, 7rem); align-items: center; }
.timeline-head h2 { margin-bottom: 0; }
.timeline-track { min-width: 0; }
.timeline-track svg { width: 100%; height: auto; overflow: visible; fill: none; stroke: var(--vermilion); stroke-width: 1.4; }
.timeline-track circle { fill: var(--paper-deep); stroke: var(--vermilion); stroke-width: 1.4; }
.timeline-labels { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1.1rem; color: #4f585f; font-family: var(--meta); font-size: .68rem; }
.timeline-labels span { display: grid; gap: .35rem; }
.timeline-labels span:nth-child(2) { text-align: center; }
.timeline-labels span:last-child { text-align: right; }
.timeline-labels b { color: var(--navy); font-size: .95rem; font-weight: 500; }
.timeline-image { grid-column: 1; width: min(100%, 520px); margin: 2.5rem 0 0; }
.timeline-image img { width: 100%; aspect-ratio: 1.5; object-fit: cover; }
.timeline-note { grid-column: 2; justify-self: end; max-width: 28rem; margin: 1.5rem 0 0; color: #4f585f; font-size: .8rem; text-align: right; }

.inquiry { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(16rem, .7fr); gap: clamp(2rem, 8vw, 8rem); align-items: start; }
.inquiry-image { margin-left: calc(var(--gutter) * -1); }
.inquiry-image img { width: min(100%, 760px); aspect-ratio: 1.5; object-fit: cover; }
.inquiry-copy { max-width: 30rem; }
.inquiry-copy h2 { margin-bottom: 2rem; }
.inquiry-form { display: grid; gap: 1.05rem; margin-top: 2.2rem; }
.field { display: grid; gap: .38rem; }
.field label { color: var(--navy); font-size: .78rem; }
.field input, .field textarea { width: 100%; min-height: 48px; padding: .7rem .8rem; border: 1px solid #8e8e86; border-radius: 0; background: rgba(255,253,248,.3); color: var(--ink); }
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--vermilion); outline-offset: 2px; border-color: var(--vermilion); }
.inquiry-form .button { justify-self: start; margin-top: .35rem; }
.form-status { min-height: 1.6em; margin: 0; color: var(--vermilion); font-size: .8rem; }

.site-footer { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 2rem; padding: 1.25rem var(--gutter); background: var(--navy); color: var(--white); }
.footer-brand img { width: 42px; height: 42px; }
.site-footer > p { margin: 0; color: #d8d3cb; font-size: .72rem; text-align: center; }
.site-footer .visual-disclosure { color: #f1b8a5; }
.footer-mark { justify-self: end; color: #b9c4c9; font-family: var(--meta); font-size: .62rem; letter-spacing: .12em; }

[data-reveal] { opacity: 1; transform: none; }
.js [data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity 650ms ease, transform 650ms cubic-bezier(.22,.61,.36,1); }
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; }
  .desktop-nav, .header-cta { display: none; }
  .menu-toggle { display: block; }
  .hero { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
  .hero h1 { font-size: clamp(3.4rem, 7.8vw, 5.3rem); }
  .material-spread { gap: 3rem; }
  .project-head { grid-template-columns: 1fr 1fr; }
  .fact-grid { grid-template-columns: repeat(2, 1fr); }
  .fact-grid div:nth-child(4n) { border-right: 1px solid rgba(255,253,248,.22); }
  .fact-grid div:nth-child(2n) { border-right: 0; }
  .rhythm, .inquiry { gap: 3rem; }
}

@media (max-width: 720px) {
  html { scroll-behavior: auto; }
  .site-header { min-height: 68px; padding-top: .55rem; padding-bottom: .55rem; }
  .brand-copy strong { font-size: .78rem; }
  .brand-copy small { font-size: .5rem; }
  .brand img { width: 42px; height: 42px; }
  .hero { display: block; min-height: auto; padding-top: 4.8rem; padding-bottom: 4.25rem; }
  .hero-copy { max-width: none; }
  .hero h1 { max-width: 8ch; margin-bottom: 2rem; font-size: clamp(3.35rem, 15.4vw, 5.2rem); line-height: .93; }
  .hero-lead { max-width: none; margin-bottom: 1.8rem; font-size: .98rem; line-height: 1.8; }
  .hero-actions { display: grid; gap: .75rem; }
  .hero-actions .button, .hero-actions .text-link { width: 100%; }
  .hero-actions .text-link { justify-content: space-between; }
  .hero-figure { margin-top: 3.4rem; }
  .hero-figure img { aspect-ratio: 1.25; }
  .cut-route-hero { right: 1rem; width: 22%; height: 50%; }
  .materials, .direction, .rhythm, .timeline, .inquiry { padding-top: 5rem; padding-bottom: 5rem; }
  h2 { font-size: clamp(2.75rem, 13vw, 4.2rem); }
  .section-intro > p:last-child, .direction-head > p:last-child, .project-head > p:last-child, .rhythm-copy > p:not(.section-kicker), .inquiry-copy > p:not(.section-kicker) { font-size: .98rem; }
  .material-spread { display: flex; flex-direction: column; gap: 2.4rem; margin-top: 3.7rem; }
  .material-main, .material-small, .material-note { width: 100%; margin: 0; }
  .material-main img { aspect-ratio: 1.25; }
  .material-small { max-width: 74%; align-self: flex-end; }
  .material-small img { aspect-ratio: 1.1; }
  .material-note { max-width: 15rem; align-self: flex-start; }
  .direction-head { margin: 0; }
  .direction-grid { display: block; margin-top: 3.7rem; margin-bottom: 4rem; }
  .direction-item, .direction-item-offset { min-height: auto; margin: 0; padding: 1.1rem 0 1.5rem; }
  .direction-item h3 { margin-top: .85rem; font-size: 1.8rem; }
  .direction-item p { max-width: 22rem; }
  .cut-table-image { width: 100%; }
  .cut-table-image img { aspect-ratio: 1.25; }
  .project { padding-top: 5rem; padding-bottom: 5rem; }
  .project-head { display: block; margin-bottom: 3rem; }
  .project-head > p { margin-top: 1.8rem; }
  .project-layout { display: flex; flex-direction: column; gap: 2.5rem; }
  .project-ledger { width: 100%; padding: 1.1rem; }
  .ledger-title { font-size: .57rem; }
  .project-ledger h3 { margin: 1.6rem 0 2rem; font-size: 1.6rem; }
  .fact-grid { grid-template-columns: repeat(2, 1fr); }
  .fact-grid div { min-height: 5rem; padding: .65rem .5rem; }
  .fact-grid dt { font-size: .56rem; }
  .fact-grid dd { font-size: .75rem; }
  .ledger-note { font-size: .72rem; }
  .project-image { width: 82%; align-self: flex-end; }
  .project-image img { aspect-ratio: 1.05; }
  .rhythm, .timeline, .inquiry { display: flex; flex-direction: column; align-items: stretch; gap: 2.8rem; }
  .rhythm-image, .inquiry-image { width: 100%; margin-left: 0; }
  .rhythm-image img, .inquiry-image img { width: 100%; aspect-ratio: 1.25; }
  .rhythm-copy, .inquiry-copy { max-width: none; }
  .timeline-track { margin-top: 1.25rem; }
  .timeline-track svg { min-width: 650px; max-width: none; transform: translateX(-8%); }
  .timeline-track { overflow: hidden; }
  .timeline-image { order: 3; width: 100%; margin-top: 0; }
  .timeline-labels { font-size: .6rem; }
  .timeline-labels b { font-size: .8rem; }
  .timeline-note { max-width: none; margin-top: 0; text-align: left; }
  .inquiry-form { margin-top: 1.9rem; }
  .inquiry-form .button { width: 100%; }
  .site-footer { grid-template-columns: 1fr 1fr; gap: 1rem; padding-top: 1.5rem; padding-bottom: 1.5rem; }
  .site-footer > p { text-align: left; }
  .site-footer .visual-disclosure { grid-column: 1 / -1; }
  .footer-mark { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
  .cut-route path { stroke-dashoffset: 0; }
}