:root {
  --ink: #12110f;
  --paper: #f2eee6;
  --paper-deep: #e7dfd2;
  --copper: #9a5b3c;
  --coral: #b7472e;
  --coral-light: #e47a5a;
  --line: rgba(18, 17, 15, 0.22);
  --line-light: rgba(242, 238, 230, 0.24);
  --measure: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; line-height: 1.6; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea { font: inherit; }
::selection { background: var(--coral); color: #fff; }

.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; top: 8px; left: 8px; z-index: 100; transform: translateY(-140%); background: var(--ink); color: #fff; padding: 10px 14px; }
.skip-link:focus { transform: translateY(0); }
.section-shell { width: min(calc(100% - 56px), var(--measure)); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--paper) 92%, transparent); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); }
.header-inner { min-height: 76px; width: min(calc(100% - 56px), var(--measure)); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 13px; text-decoration: none; min-height: 48px; }
.brand-mark { width: 42px; height: 42px; color: var(--ink); flex: 0 0 auto; }
.brand-copy { display: grid; line-height: 1.15; }
.brand-copy strong { font-size: 15px; letter-spacing: .02em; }
.brand-copy small { color: rgba(18,17,15,.58); margin-top: 5px; font-size: 10px; letter-spacing: .18em; text-transform: uppercase; }
.primary-nav { display: flex; align-items: center; gap: 26px; font-size: 13px; }
.primary-nav a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; position: relative; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 7px; height: 1px; background: var(--coral); transition: right .25s ease; }
.primary-nav a:hover::after, .primary-nav a:focus-visible::after { right: 0; }
.primary-nav .nav-contact { color: #fff; background: var(--ink); padding: 0 18px; }
.primary-nav .nav-contact::after { display: none; }
.menu-button { display: none; width: 48px; height: 48px; border: 1px solid var(--ink); background: transparent; padding: 13px; align-content: center; gap: 7px; }
.menu-button span:not(.sr-only) { display: block; height: 1px; background: currentColor; transition: transform .2s ease; }

.hero { min-height: calc(100vh - 76px); display: grid; grid-template-columns: minmax(360px, .8fr) minmax(520px, 1.25fr); grid-template-rows: 1fr auto; border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-copy { padding: clamp(70px, 9vw, 142px) clamp(28px, 5vw, 90px) 72px max(28px, calc((100vw - var(--measure))/2)); align-self: center; position: relative; }
.hero-index { font-family: ui-monospace, monospace; font-size: 11px; letter-spacing: .2em; margin: 0 0 54px; color: var(--copper); }
.hero h1 { margin: 0; font-size: clamp(54px, 6.2vw, 106px); line-height: .98; letter-spacing: -.07em; font-weight: 800; }
.hero h1 em { color: var(--coral); font-style: normal; }
.hero-lede { max-width: 590px; margin: 38px 0 0; font-size: clamp(16px, 1.35vw, 20px); color: rgba(18,17,15,.72); }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 42px; }
.button { min-height: 48px; padding: 0 24px; border: 1px solid var(--ink); display: inline-flex; align-items: center; justify-content: center; text-decoration: none; cursor: pointer; transition: background .2s ease, color .2s ease, transform .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--coral); color: #fff; border-color: var(--coral); }
.button-primary:hover, .button-primary:focus-visible { background: var(--ink); border-color: var(--ink); }
.text-link, .source-link { min-height: 44px; display: inline-flex; align-items: center; gap: 9px; text-underline-offset: 5px; text-decoration-thickness: 1px; }
.hero-visual { margin: 0; position: relative; min-height: 650px; border-left: 1px solid var(--line); background: var(--ink); overflow: hidden; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-visual figcaption { position: absolute; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: repeat(3,1fr); background: rgba(18,17,15,.92); color: #fff; }
.hero-visual figcaption span { padding: 18px 22px; font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: .14em; border-right: 1px solid var(--line-light); }
.hero-cadence { grid-column: 1/-1; height: 52px; display: grid; grid-template-columns: 1fr 1.4fr .6fr; gap: 0; }
.hero-cadence span { border-right: 1px solid var(--line); position: relative; }
.hero-cadence span::after { content: ""; position: absolute; left: 26px; top: 50%; width: 32px; height: 2px; background: var(--coral); }

.section-number { font-family: Georgia, serif; font-size: 72px; color: var(--copper); line-height: 1; }
.section-intro h2, .responsibility-copy h2, .contact-copy h2 { margin: 0; font-size: clamp(42px, 6vw, 82px); line-height: 1.04; letter-spacing: -.055em; }
.section-intro > p { margin: 24px 0 0; max-width: 630px; font-size: 17px; color: rgba(18,17,15,.67); }

.position { padding: 128px 0 140px; display: grid; grid-template-columns: 120px 1fr 1fr; gap: 0 50px; align-items: start; }
.position .section-intro { grid-column: 2/-1; max-width: 900px; }
.position-image { grid-column: 1/3; margin: 90px 0 0; }
.image-frame { overflow: hidden; }
.image-frame img { width: 100%; aspect-ratio: 3/2; object-fit: cover; transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.image-frame:hover img { transform: scale(1.015); }
.position-statement { grid-column: 3; align-self: end; border-top: 1px solid var(--ink); padding-top: 24px; margin-bottom: 12px; }
.position-statement p { margin: 0 0 22px; font-size: 18px; }
.source-link { font-size: 13px; }

.system { background: var(--ink); color: var(--paper); padding: 128px 0 0; }
.system-copy { display: grid; grid-template-columns: 120px 1fr; gap: 50px; }
.system .section-intro > p { color: rgba(242,238,230,.65); }
.system-visual { margin: 90px 0 0; position: relative; height: min(66vw, 760px); overflow: hidden; border-block: 1px solid var(--line-light); }
.system-visual figure { margin: 0; width: 100%; height: 100%; }
.system-visual img { width: 100%; height: 100%; object-fit: cover; opacity: .93; }
.pulse-track { position: absolute; inset: auto 0 8%; width: 100%; height: 28%; overflow: visible; }
.pulse-track path { fill: none; stroke: var(--coral); stroke-width: 3; stroke-linecap: square; stroke-dasharray: .12 .88; stroke-dashoffset: 1; opacity: .82; }
.pulse-once .pulse-track path { animation: pulse-path 1.8s cubic-bezier(.2,.7,.2,1) 1 both; }
@keyframes pulse-path { to { stroke-dashoffset: 0; } }
.system-ledger { display: grid; grid-template-columns: repeat(3,1fr); }
.ledger-line { padding: 42px 30px 52px 0; border-right: 1px solid var(--line-light); }
.ledger-line + .ledger-line { padding-left: 30px; }
.ledger-line:last-child { border-right: 0; }
.ledger-line span, .direction-code { display: block; font-family: ui-monospace, monospace; color: var(--coral); font-size: 10px; letter-spacing: .16em; margin-bottom: 24px; }
.system .ledger-line span { color: var(--coral-light); }
.ledger-line h3 { margin: 0; font-size: 30px; }
.ledger-line p { color: rgba(242,238,230,.62); margin: 14px 0 0; }
.coordination-image { margin-top: 60px; padding-bottom: 120px; }

.directions { padding: 138px 0; }
.directions-heading { display: grid; grid-template-columns: 1.25fr .75fr; gap: 60px; align-items: end; margin: -42px 0 90px 170px; }
.directions-heading > p { margin: 0 0 8px; }
.direction-row { display: grid; grid-template-columns: .72fr 1.28fr; border-top: 1px solid var(--ink); min-height: 460px; }
.direction-row:last-child { border-bottom: 1px solid var(--ink); }
.direction-row-reverse { grid-template-columns: 1.28fr .72fr; }
.direction-row-reverse .direction-copy { order: 2; }
.direction-copy { padding: 46px 44px 46px 0; display: flex; flex-direction: column; justify-content: center; }
.direction-row-reverse .direction-copy { padding: 46px 0 46px 44px; }
.direction-copy h3 { margin: 0; font-size: clamp(38px, 4.2vw, 64px); letter-spacing: -.045em; line-height: 1; }
.direction-copy p { max-width: 460px; margin: 26px 0 0; color: rgba(18,17,15,.68); }
.direction-row figure { margin: 0; overflow: hidden; border-left: 1px solid var(--ink); }
.direction-row-reverse figure { border-left: 0; border-right: 1px solid var(--ink); }
.direction-row figure img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s cubic-bezier(.2,.7,.2,1); }
.direction-row:hover figure img { transform: scale(1.015); }

.responsibility { background: #211f1b; color: var(--paper); padding: 128px 0; }
.responsibility-grid { display: grid; grid-template-columns: 120px .72fr 1.28fr; gap: 0 50px; }
.responsibility-copy p { max-width: 540px; font-size: 18px; color: rgba(242,238,230,.7); margin: 30px 0 0; }
.responsibility-copy .boundary-note { font-size: 13px; border-left: 2px solid var(--coral); padding-left: 16px; }
.source-link-light { margin-top: 28px; }
.responsibility-image { margin: 0; min-height: 590px; overflow: hidden; }
.responsibility-image img { width: 100%; height: 100%; object-fit: cover; }

.contact { padding: 138px 0 120px; display: grid; grid-template-columns: 120px .8fr 1.2fr; gap: 0 50px; }
.contact-copy > p { max-width: 560px; margin: 28px 0; color: rgba(18,17,15,.68); }
.contact-channel { padding-top: 26px; border-top: 1px solid var(--ink); display: grid; gap: 7px; }
.contact-channel span { font-size: 11px; letter-spacing: .12em; color: var(--copper); }
.contact-channel a { font-size: clamp(18px, 2vw, 28px); text-underline-offset: 5px; }
.contact-channel a { min-height: 44px; display: inline-flex; align-items: center; }
.inquiry-form { align-self: start; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); }
.form-row { padding: 20px 0 16px; border-bottom: 1px solid var(--line); }
.form-row:nth-child(odd):not(.form-row-wide) { padding-right: 18px; border-right: 1px solid var(--line); }
.form-row:nth-child(even) { padding-left: 18px; }
.form-row-wide { grid-column: 1/-1; }
.form-row label { display: block; font-size: 11px; letter-spacing: .12em; color: var(--copper); margin-bottom: 7px; }
.form-row input, .form-row textarea { width: 100%; border: 0; background: transparent; color: var(--ink); min-height: 44px; padding: 5px 2px; border-radius: 0; resize: vertical; }
.form-row input:focus-visible, .form-row textarea:focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; }
.form-submit { grid-column: 1/-1; display: flex; align-items: center; gap: 20px; padding-top: 24px; }
.form-submit p { margin: 0; color: #8e3d28; font-size: 13px; }

.site-footer { background: var(--ink); color: var(--paper); border-top: 4px solid var(--coral); }
.footer-inner { min-height: 260px; display: grid; grid-template-columns: 1.2fr .8fr; grid-template-rows: 1fr auto; gap: 35px 70px; align-items: center; padding-block: 58px 24px; }
.footer-brand { display: grid; gap: 8px; }
.footer-brand strong { font-size: 22px; }
.footer-brand span, .creative-note, .copyright { color: rgba(242,238,230,.58); font-size: 11px; letter-spacing: .12em; }
.footer-inner nav { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.footer-inner nav a { min-height: 44px; display: inline-flex; align-items: center; text-underline-offset: 4px; }
.creative-note, .copyright { margin: 0; border-top: 1px solid var(--line-light); padding-top: 18px; }
.copyright { text-align: right; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }

:focus-visible { outline: 2px solid var(--coral); outline-offset: 4px; }

@media (max-width: 1060px) {
  .hero { grid-template-columns: .9fr 1.1fr; }
  .hero-copy { padding-left: 32px; }
  .position, .contact { grid-template-columns: 80px 1fr 1fr; gap: 0 34px; }
  .responsibility-grid { grid-template-columns: 80px .9fr 1.1fr; gap: 0 34px; }
  .system-copy { grid-template-columns: 80px 1fr; gap: 34px; }
  .directions-heading { margin-left: 114px; }
}

@media (max-width: 820px) {
  .section-shell, .header-inner { width: min(calc(100% - 36px), var(--measure)); }
  .site-header { backdrop-filter: none; }
  .menu-button { display: grid; position: relative; z-index: 52; }
  .menu-button[aria-expanded="true"] span:not(.sr-only):first-of-type { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:not(.sr-only):last-of-type { transform: translateY(-4px) rotate(-45deg); }
  .primary-nav { position: fixed; inset: 0; z-index: 50; background: var(--paper); display: flex; flex-direction: column; align-items: stretch; justify-content: center; padding: 100px 24px 36px; transform: translateX(100%); visibility: hidden; transition: transform .28s ease, visibility .28s; }
  .primary-nav.is-open { transform: translateX(0); visibility: visible; }
  .primary-nav a { min-height: 58px; font-size: 24px; border-bottom: 1px solid var(--line); }
  .primary-nav .nav-contact { justify-content: center; margin-top: 20px; }
  .hero { min-height: 0; display: flex; flex-direction: column; }
  .hero-copy { padding: 70px 18px 58px; }
  .hero-index { margin-bottom: 36px; }
  .hero h1 { font-size: clamp(52px, 12vw, 82px); }
  .hero-visual { min-height: 62vw; border-left: 0; border-top: 1px solid var(--line); }
  .hero-cadence { display: none; }
  .position { display: grid; grid-template-columns: 64px 1fr; padding: 90px 0; gap: 0 18px; }
  .position .section-intro { grid-column: 2; }
  .position-image { grid-column: 1/-1; margin-top: 54px; }
  .position-statement { grid-column: 2; margin-top: 34px; }
  .system { padding-top: 90px; }
  .system-copy { grid-template-columns: 64px 1fr; gap: 18px; }
  .system-visual { height: 65vw; margin-top: 54px; }
  .system-ledger { grid-template-columns: 1fr; }
  .ledger-line, .ledger-line + .ledger-line { padding: 30px 0; border-right: 0; border-bottom: 1px solid var(--line-light); }
  .coordination-image { margin-top: 42px; padding-bottom: 90px; }
  .directions { padding: 90px 0; }
  .directions-heading { display: block; margin: 20px 0 54px 82px; }
  .directions-heading > p { margin-top: 24px; }
  .direction-row, .direction-row-reverse { grid-template-columns: 1fr; min-height: 0; }
  .direction-copy, .direction-row-reverse .direction-copy { order: 0; padding: 38px 0; }
  .direction-row figure, .direction-row-reverse figure { border: 0; border-top: 1px solid var(--ink); aspect-ratio: 3/2; }
  .responsibility { padding: 90px 0; }
  .responsibility-grid { grid-template-columns: 64px 1fr; gap: 0 18px; }
  .responsibility-copy { grid-column: 2; }
  .responsibility-image { grid-column: 1/-1; min-height: 0; aspect-ratio: 3/2; margin-top: 54px; }
  .contact { padding: 90px 0; grid-template-columns: 64px 1fr; gap: 0 18px; }
  .contact-copy { grid-column: 2; }
  .inquiry-form { grid-column: 1/-1; margin-top: 58px; }
}

@media (max-width: 540px) {
  .header-inner { min-height: 68px; }
  .brand-mark { width: 38px; height: 38px; }
  .brand-copy strong { font-size: 14px; }
  .brand-copy small { letter-spacing: .1em; }
  .hero-copy { padding-top: 58px; }
  .hero h1 { font-size: clamp(44px, 13vw, 64px); }
  .hero-lede { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 12px; }
  .text-link { justify-content: center; }
  .hero-visual { min-height: 82vw; }
  .hero-visual figcaption span { padding: 14px 8px; font-size: 8px; text-align: center; }
  .section-number { font-size: 52px; }
  .section-intro h2, .responsibility-copy h2, .contact-copy h2 { font-size: 40px; }
  .position, .system-copy, .responsibility-grid, .contact { grid-template-columns: 48px 1fr; gap: 0 12px; }
  .position-image { aspect-ratio: 4/3; }
  .position-image img, .coordination-image img { height: 100%; }
  .directions-heading { margin-left: 0; }
  .direction-row figure, .direction-row-reverse figure { aspect-ratio: 4/3; }
  .direction-copy h3 { font-size: 38px; }
  .responsibility-image { aspect-ratio: 4/3; }
  .inquiry-form { grid-template-columns: 1fr; }
  .form-row, .form-row:nth-child(odd):not(.form-row-wide), .form-row:nth-child(even) { grid-column: 1; padding: 18px 0; border-right: 0; }
  .form-submit { flex-direction: column; align-items: stretch; }
  .form-submit p { min-height: 42px; }
  .footer-inner { grid-template-columns: 1fr; grid-template-rows: auto; gap: 32px; }
  .footer-inner nav { grid-template-columns: 1fr 1fr; }
  .copyright { text-align: left; }
}

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