:root {
  --paper: #f4f5f2;
  --paper-deep: #e2e5e1;
  --ink: #1b2224;
  --graphite: #263034;
  --teal: #2d6b69;
  --oxide: #9d5b43;
  --line: #aeb8b5;
  --white: #fbfcf9;
  --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; cursor: pointer; }
:focus-visible { outline: 2px solid var(--oxide); outline-offset: 4px; }

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

.site-header { position: sticky; top: 0; z-index: 10; display: grid; grid-template-columns: minmax(16rem, 1fr) auto minmax(13rem, 1fr); align-items: center; gap: 2rem; min-height: 76px; padding: .75rem var(--gutter); border-bottom: 1px solid rgba(27,34,36,.3); background: rgba(244,245,242,.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: #46615f; font-family: var(--meta); font-size: .58rem; letter-spacing: .11em; 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 { display: inline-flex; align-items: center; min-height: 44px; border-bottom: 1px solid transparent; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--teal); 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(--graphite); font-size: .78rem; }
.header-cta span, .button span, .text-link span { color: var(--oxide); font-size: 1.1rem; }
.header-cta:hover, .header-cta:focus-visible { background: var(--graphite); color: var(--white); }
.menu-toggle { display: none; justify-self: end; width: 46px; height: 46px; padding: .7rem; border: 1px solid var(--graphite); background: transparent; color: var(--graphite); }
.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(--graphite); color: var(--white); transform: translateX(100%); visibility: hidden; transition: transform 300ms cubic-bezier(.22,.61,.36,1), visibility 0s linear 300ms; }
.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(251,252,249,.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(251,252,249,.75); background: transparent; color: var(--white); }
.menu-close:hover, .menu-close:focus-visible { background: var(--white); color: var(--graphite); }
.mobile-menu nav { display: grid; margin-top: 2rem; }
.mobile-menu nav a { display: flex; align-items: center; min-height: 72px; border-bottom: 1px solid rgba(251,252,249,.35); font-family: var(--display); font-size: clamp(1.6rem, 7vw, 2.4rem); line-height: 1.1; }
.mobile-menu nav a:hover, .mobile-menu nav a:focus-visible { color: #a7d1cb; }
.mobile-menu > p { margin-top: auto; color: #d3ded9; font-family: var(--meta); font-size: .68rem; letter-spacing: .12em; }

.section-paper { background: var(--paper); }
.section-soft { background: var(--paper-deep); }
.section-deep, .section-graphite { background: var(--graphite); color: var(--white); }
.hero { position: relative; 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); overflow: hidden; }
.hero-copy { position: relative; z-index: 1; }
.location-line { margin: 0 0 1.7rem; color: var(--teal); font-family: var(--meta); font-size: .7rem; letter-spacing: .08em; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--display); font-weight: 400; }
.hero h1 { max-width: 8ch; margin-bottom: 2.3rem; color: var(--graphite); font-size: clamp(3.6rem, 7.2vw, 6.8rem); letter-spacing: -.045em; line-height: .95; }
.hero h1 em, h2 em, h3 em { color: var(--oxide); font-style: normal; }
.hero-lead { max-width: 34rem; margin-bottom: 2.3rem; color: #435055; font-size: 1.02rem; 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; }
.button-dark { background: var(--graphite); color: var(--white); }
.button-dark:hover, .button-dark:focus-visible { background: var(--teal); }
.text-link { display: inline-flex; align-items: center; gap: .6rem; min-height: 44px; border-bottom: 1px solid var(--teal); color: var(--graphite); font-size: .86rem; }
.text-link:hover, .text-link:focus-visible { color: var(--teal); }
.hero-figure { position: relative; z-index: 1; margin: 0; }
.hero-figure img { width: 100%; aspect-ratio: 1.48; object-fit: cover; }
figure figcaption { display: flex; justify-content: space-between; gap: 1rem; margin-top: .65rem; color: #52605e; font-family: var(--meta); font-size: .62rem; letter-spacing: .06em; line-height: 1.4; }
figure figcaption span:first-child { color: var(--oxide); }
.access-route { position: absolute; pointer-events: none; fill: none; stroke: var(--teal); stroke-linecap: round; stroke-width: 1.3; opacity: .75; }
.access-route path { stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset 1300ms cubic-bezier(.22,.61,.36,1); }
.access-route.is-drawn path { stroke-dashoffset: 0; }
.access-route-hero { top: 1rem; right: clamp(2rem, 9vw, 9rem); width: 13%; height: 94%; }

.planes, .direction, .project, .plan, .inquiry { padding: clamp(5rem, 10vw, 10rem) var(--gutter); }
.section-intro, .plane-spread, .sequence-row, .direction-head, .direction-grid, .shelf-image, .project-head, .project-layout, .plan-head, .plan-track, .plan-image, .plan-note, .inquiry { max-width: var(--max); margin-left: auto; margin-right: auto; }
.section-intro { position: relative; z-index: 1; }
h2 { margin-bottom: 1.7rem; color: var(--graphite); font-size: clamp(3rem, 5.8vw, 5.8rem); letter-spacing: -.045em; line-height: .97; }
.section-intro > p:last-child, .direction-head > p:last-child, .project-head > p:last-child, .sequence-copy > p:last-child, .inquiry-copy > p:not(.form-status) { max-width: 33rem; color: #4c5a5d; }
.plane-spread { position: relative; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(12rem, .55fr); grid-template-rows: auto auto; gap: clamp(2rem, 6vw, 6rem) clamp(2rem, 7vw, 7rem); align-items: end; margin-top: clamp(4rem, 9vw, 9rem); }
.plane-main, .plane-detail, .sequence-image, .shelf-image, .project-image, .plan-image, .inquiry-image { margin: 0; }
.plane-main img { width: 100%; aspect-ratio: 1.45; object-fit: cover; }
.plane-detail { align-self: end; }
.plane-detail img { width: 100%; aspect-ratio: .95; object-fit: cover; }
.plane-note { align-self: center; max-width: 18rem; margin: 0; color: var(--teal); font-family: var(--display); font-size: 1.55rem; line-height: 1.25; }
.plane-note em { color: var(--oxide); font-style: normal; }
.sequence-row { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(16rem, .65fr); gap: clamp(2rem, 9vw, 9rem); align-items: center; margin-top: clamp(6rem, 12vw, 12rem); }
.sequence-image img { width: 100%; aspect-ratio: 1.45; object-fit: cover; }
.sequence-copy { max-width: 28rem; }
.line-mark { width: 5rem; height: 1px; margin-bottom: 1.2rem; background: var(--teal); }
.sequence-copy h3 { margin-bottom: 1.2rem; color: var(--graphite); font-size: clamp(2.6rem, 4.5vw, 4.7rem); letter-spacing: -.04em; line-height: .98; }
.access-route-planes { right: 8%; bottom: 3rem; width: 84%; height: 16%; }

.direction { position: relative; overflow: hidden; }
.direction-head { display: grid; grid-template-columns: minmax(15rem, .8fr) minmax(18rem, .7fr); gap: 2rem; }
.direction-head h2 { grid-column: 1; color: var(--white); }
.direction-head > p:last-child { grid-column: 2; align-self: end; margin-bottom: .5rem; color: #d6dfdc; }
.direction-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1.5rem, 4vw, 4rem); margin-top: clamp(4rem, 8vw, 8rem); margin-bottom: clamp(4rem, 7vw, 7rem); }
.direction-item { min-height: 12rem; padding-top: 1rem; border-top: 1px solid rgba(251,252,249,.45); }
.item-index { color: #9bc9c2; font-family: var(--meta); font-size: .68rem; letter-spacing: .18em; }
.direction-item h3 { margin: 1.4rem 0 .7rem; color: var(--white); font-size: 2.1rem; line-height: 1; }
.direction-item p { max-width: 18rem; margin-bottom: 0; color: #d6dfdc; }
.shelf-image img { width: min(100%, 760px); aspect-ratio: 1.45; object-fit: cover; }
.direction figure figcaption { color: #ccd7d3; }

.project { position: relative; overflow: hidden; }
.project-head { display: grid; grid-template-columns: minmax(14rem, .8fr) minmax(18rem, .7fr); gap: 2rem; margin-bottom: clamp(3rem, 7vw, 7rem); }
.project-head h2 { grid-column: 1; color: var(--white); margin-bottom: 0; }
.project-head > p:last-child { grid-column: 2; align-self: end; margin-bottom: .4rem; color: #d6dfdc; }
.project-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(12rem, .65fr); align-items: end; gap: clamp(2rem, 6vw, 6rem); }
.project-ledger { padding: clamp(1.25rem, 3vw, 3rem); border: 1px solid rgba(251,252,249,.55); }
.ledger-title { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid rgba(251,252,249,.4); color: #d2ddda; 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(1.7rem, 3vw, 2.7rem); 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(251,252,249,.24); border-right: 1px solid rgba(251,252,249,.24); }
.fact-grid div:nth-child(4n) { border-right: 0; }
.fact-grid dt { margin-bottom: .35rem; color: #b9c8c4; 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: #e4b6a6; font-size: .78rem; }
.project-image { margin-bottom: 0; }
.project-image img { width: 100%; aspect-ratio: .95; object-fit: cover; }
.project figure figcaption { color: #b9c8c4; }

.plan { position: relative; overflow: hidden; }
.plan-head { max-width: var(--max); }
.plan-track { display: grid; grid-template-columns: minmax(14rem, .55fr) minmax(0, 1.25fr); gap: clamp(2rem, 7vw, 7rem); align-items: center; margin-top: clamp(4rem, 8vw, 8rem); }
.plan-track svg { grid-column: 2; width: 100%; height: auto; overflow: visible; fill: none; stroke: var(--teal); stroke-width: 1.4; }
.plan-track circle { fill: var(--teal); stroke: var(--paper-deep); stroke-width: 5; }
.plan-labels { display: flex; justify-content: space-between; grid-column: 2; gap: 1rem; margin-top: -1rem; color: #445255; font-family: var(--meta); font-size: .68rem; }
.plan-labels span { display: grid; gap: .35rem; }
.plan-labels b { color: var(--graphite); font-size: .95rem; font-weight: 500; }
.plan-image { width: min(100%, 600px); margin-top: clamp(4rem, 7vw, 7rem); margin-left: 0; }
.plan-image img { width: 100%; aspect-ratio: 1.45; object-fit: cover; }
.plan-note { max-width: 28rem; margin-top: 1.5rem; color: #4f5b5d; 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 img { width: min(100%, 760px); aspect-ratio: 1.45; object-fit: cover; }
.inquiry-copy h2 { margin-bottom: 1.6rem; }
.inquiry-form { display: grid; gap: 1.05rem; margin-top: 2.2rem; }
.field { display: grid; gap: .38rem; }
.field label { color: var(--graphite); font-size: .78rem; }
.field input, .field textarea { width: 100%; min-height: 48px; padding: .7rem .8rem; border: 1px solid #899793; border-radius: 0; background: rgba(251,252,249,.55); color: var(--ink); }
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--teal); outline-offset: 2px; border-color: var(--teal); }
.form-status { min-height: 1.6em; margin: 0; color: var(--oxide); 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(--graphite); color: var(--white); }
.footer-brand img { width: 42px; height: 42px; }
.site-footer > p { margin: 0; color: #d6dfdc; font-size: .72rem; text-align: center; }
.site-footer .visual-disclosure { color: #e4b6a6; }
.footer-mark { justify-self: end; color: #b9c8c4; 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; }
  .direction-head, .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(251,252,249,.24); }
  .fact-grid div:nth-child(2n) { border-right: 0; }
}

@media (max-width: 720px) {
  .site-header { min-height: 68px; padding-top: .55rem; padding-bottom: .55rem; }
  .brand { gap: .6rem; }
  .brand img { width: 42px; height: 42px; }
  .brand-copy strong { font-size: .78rem; }
  .brand-copy small { font-size: .5rem; }
  .hero { display: block; min-height: auto; padding-top: 4.8rem; padding-bottom: 4.25rem; }
  .location-line { margin-bottom: 1.4rem; font-size: .62rem; }
  .hero h1 { max-width: 8ch; margin-bottom: 2rem; font-size: clamp(3.35rem, 15.1vw, 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-figure { margin-top: 3.4rem; }
  .hero-figure img { aspect-ratio: 1.22; }
  .access-route-hero { right: 1rem; width: 22%; height: 48%; }
  .planes, .direction, .project, .plan, .inquiry { padding-top: 5rem; padding-bottom: 5rem; }
  h2 { margin-bottom: 1.4rem; font-size: clamp(2.85rem, 14vw, 4.5rem); }
  .section-intro > p:last-child, .direction-head > p:last-child, .project-head > p:last-child, .sequence-copy > p:last-child, .inquiry-copy > p:not(.form-status) { font-size: .98rem; }
  .plane-spread { display: flex; flex-direction: column; gap: 2.4rem; margin-top: 3.7rem; }
  .plane-main img { aspect-ratio: 1.22; }
  .plane-detail { width: 78%; align-self: flex-end; }
  .plane-detail img { aspect-ratio: 1.05; }
  .plane-note { align-self: flex-start; max-width: 18rem; font-size: 1.35rem; }
  .sequence-row { display: flex; flex-direction: column; gap: 2.8rem; margin-top: 5rem; }
  .sequence-image img { aspect-ratio: 1.22; }
  .sequence-copy { max-width: none; }
  .sequence-copy h3 { font-size: clamp(2.6rem, 12vw, 4.2rem); }
  .access-route-planes { right: 7%; bottom: 5rem; width: 86%; height: 12%; }
  .direction-head, .project-head { display: block; }
  .direction-head > p:last-child, .project-head > p:last-child { margin-top: 1.8rem; }
  .direction-grid { display: block; margin-top: 3.7rem; margin-bottom: 4rem; }
  .direction-item { min-height: auto; padding: 1.1rem 0 1.5rem; }
  .direction-item h3 { margin-top: 1rem; font-size: 1.9rem; }
  .shelf-image img { width: 100%; aspect-ratio: 1.22; }
  .project { padding-top: 5rem; padding-bottom: 5rem; }
  .project-layout { display: flex; flex-direction: column; gap: 2.5rem; }
  .project-ledger { width: 100%; padding: 1.1rem; }
  .project-ledger h3 { margin: 1.6rem 0 2rem; font-size: 1.65rem; }
  .fact-grid div { min-height: 5rem; padding: .65rem .5rem; }
  .fact-grid dt { font-size: .56rem; }
  .fact-grid dd { font-size: .75rem; }
  .project-image { width: 82%; align-self: flex-end; }
  .project-image img { aspect-ratio: 1.05; }
  .plan-track { display: flex; flex-direction: column; align-items: stretch; gap: 1.2rem; margin-top: 3.7rem; }
  .plan-track svg { width: 100%; }
  .plan-labels { gap: .7rem; margin-top: 0; font-size: .58rem; }
  .plan-labels b { font-size: .78rem; }
  .plan-image { width: 100%; margin-top: 3.8rem; }
  .plan-image img { aspect-ratio: 1.22; }
  .plan-note { margin-top: 1.2rem; font-size: .76rem; text-align: left; }
  .inquiry { display: flex; flex-direction: column; gap: 2.8rem; }
  .inquiry-image img { width: 100%; aspect-ratio: 1.22; }
  .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) {
  html { scroll-behavior: auto; }
  .mobile-menu, .menu-toggle span, .access-route path, .js [data-reveal] { transition: none; }
  .js [data-reveal] { opacity: 1; transform: none; }
}