:root {
  --bg: #1b2a3b;
  --bg-elevated: #24384d;
  --panel: rgba(39, 58, 77, .72);
  --text: #f4efe5;
  --muted: #b1bbc2;
  --line: rgba(223, 226, 217, .18);
  --line-strong: rgba(223, 226, 217, .38);
  --accent: #d0ad68;
  --accent-soft: rgba(208, 173, 104, .16);
  --header-bg: rgba(27, 42, 59, .78);
  --glow-a: rgba(67, 118, 145, .3);
  --glow-b: rgba(171, 126, 75, .2);
  --surface-wash: rgba(244, 239, 229, .025);
  --qr-frame: #d6c5a7;
  --rounded: ui-rounded, "SF Pro Rounded", "Arial Rounded MT Bold", "Avenir Next Rounded", "Nunito", sans-serif;
  --zh-art: "Songti SC", "STSong", "Kaiti SC", "STKaiti", "KaiTi", serif;
  --serif: var(--rounded);
  --sans: var(--rounded);
  --ease: cubic-bezier(.22, 1, .36, 1);
}

html[data-theme="light"] {
  --bg: #cdbd9f;
  --bg-elevated: #dac8a8;
  --panel: rgba(211, 193, 161, .78);
  --text: #273d50;
  --muted: #5e6c72;
  --line: rgba(47, 67, 84, .19);
  --line-strong: rgba(47, 67, 84, .36);
  --accent: #79592b;
  --accent-soft: rgba(121, 89, 43, .15);
  --header-bg: rgba(207, 190, 159, .86);
  --glow-a: rgba(92, 137, 157, .22);
  --glow-b: rgba(161, 113, 62, .2);
  --surface-wash: rgba(102, 75, 39, .055);
  --qr-frame: #c3ae8b;
}

html[lang^="zh"] {
  --serif: var(--zh-art);
  --sans: var(--zh-art);
  font-size: 15px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { position: relative; margin: 0; background:
  radial-gradient(circle at 82% 12%, var(--glow-a), transparent 30rem),
  radial-gradient(circle at 8% 58%, var(--glow-b), transparent 35rem),
  linear-gradient(145deg, var(--bg-elevated) 0%, var(--bg) 38%, var(--bg) 72%, var(--bg-elevated) 100%);
  background-attachment: fixed; color: var(--text); font-family: var(--sans); line-height: 1.6; transition: background .45s ease, color .45s ease; }
body::before { content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: .52; background-image:
  linear-gradient(var(--line) 1px, transparent 1px),
  linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 72%);
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 72%); }
body::after { content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none; background:
  linear-gradient(90deg, transparent calc(50% - 1px), var(--line) 50%, transparent calc(50% + 1px)),
  radial-gradient(ellipse at 50% 0%, transparent 28%, var(--line) 28.15%, transparent 28.35%); opacity: .48; }
header, main, footer { position: relative; z-index: 1; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
::selection { background: var(--accent); color: var(--bg); }

.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; background: var(--accent); color: var(--bg); }
.skip-link:focus { top: 1rem; }
.grain { position: fixed; inset: 0; z-index: 50; pointer-events: none; opacity: .035; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E"); }
.section-shell { width: min(1240px, calc(100% - 64px)); margin-inline: auto; }

.site-header { position: fixed; inset: 0 0 auto; height: 78px; z-index: 40; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 max(32px, calc((100vw - 1240px) / 2)); border-bottom: 1px solid transparent; transition: background .3s, border-color .3s, backdrop-filter .3s; }
.site-header.scrolled { background: var(--header-bg); border-color: var(--line); backdrop-filter: blur(18px); }
.brand { display: inline-flex; align-items: center; gap: 12px; width: fit-content; font-family: var(--rounded); font-size: .72rem; letter-spacing: .19em; font-weight: 650; }
.brand-mark { width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; gap: 0; border: 1px solid var(--line-strong); transform: rotate(45deg); }
.brand-mark i { font-family: var(--rounded); font-size: .72rem; font-style: normal; line-height: 1; transform: rotate(-45deg); margin: 0 -1px; }
.desktop-nav { display: flex; gap: 36px; }
.desktop-nav a { position: relative; color: var(--muted); font-size: .7rem; letter-spacing: .15em; text-transform: uppercase; transition: color .25s; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -9px; height: 1px; background: var(--accent); transition: right .3s var(--ease); }
.desktop-nav a:hover { color: var(--text); }
.desktop-nav a:hover::after { right: 0; }
.controls { justify-self: end; display: flex; align-items: center; gap: 8px; }
.icon-button, .language-button, .menu-button { height: 38px; border: 1px solid var(--line); background: transparent; cursor: pointer; transition: border-color .25s, background .25s; }
.icon-button:hover, .language-button:hover, .menu-button:hover { border-color: var(--line-strong); background: var(--accent-soft); }
.icon-button { width: 38px; display: grid; place-items: center; }
.icon-button svg { width: 17px; fill: none; stroke: currentColor; stroke-width: 1.4; }
.language-button { padding: 0 13px; font-size: .68rem; letter-spacing: .1em; }
.menu-button { display: none; width: 38px; padding: 10px; }
.menu-button span { display: block; height: 1px; background: currentColor; margin: 5px 0; transition: transform .3s; }
.mobile-menu { display: none; }

.hero { min-height: 100svh; position: relative; display: flex; align-items: center; overflow: hidden; padding-top: 110px; padding-bottom: 80px; }
.hero::before { content: ""; position: absolute; inset: 14% 5% 9% 48%; pointer-events: none; border: 1px solid var(--line); border-radius: 50% 50% 0 0; opacity: .65; }
.hero::after { content: "MMXXVI"; position: absolute; right: 8%; top: 20%; color: var(--line-strong); font-family: var(--rounded); font-size: clamp(3rem, 7vw, 7rem); letter-spacing: .18em; writing-mode: vertical-rl; opacity: .34; }
.hero-copy { z-index: 2; width: min(750px, 66%); }
.eyebrow { color: var(--accent); font-size: .68rem; letter-spacing: .22em; font-weight: 650; }
.hero h1 { margin: 25px 0 20px; font-family: var(--rounded); font-size: clamp(5.2rem, 11.5vw, 10.5rem); font-weight: 600; line-height: .76; letter-spacing: -.055em; }
.hero h1 em { color: var(--accent); font-weight: 400; font-style: italic; }
.hero-tagline { max-width: 650px; margin: 32px 0 18px; font-family: var(--serif); font-size: clamp(1.55rem, 2.6vw, 2.5rem); line-height: 1.2; letter-spacing: -.02em; }
.hero-intro { max-width: 565px; color: var(--muted); font-size: .95rem; }
.hero-actions { display: flex; gap: 14px; margin-top: 36px; }
.button { height: 48px; display: inline-flex; align-items: center; justify-content: space-between; gap: 30px; padding: 0 19px; border: 1px solid var(--line-strong); font-size: .72rem; letter-spacing: .08em; transition: color .3s, background .3s, transform .3s; }
.button:hover { transform: translateY(-2px); }
.button-primary { min-width: 196px; color: var(--bg); background: var(--text); border-color: var(--text); }
.button-primary:hover { background: var(--accent); border-color: var(--accent); }
.button-quiet:hover { background: var(--accent-soft); border-color: var(--accent); }
.hero-orbit { position: absolute; width: min(48vw, 650px); aspect-ratio: 1; right: -2%; top: 50%; transform: translateY(-50%); display: grid; place-items: center; }
.orbit { position: absolute; inset: 5%; border: 1px solid var(--line); border-radius: 50%; }
.orbit::before, .orbit::after { content: ""; position: absolute; width: 7px; aspect-ratio: 1; border: 1px solid var(--accent); border-radius: 50%; background: var(--bg); }
.orbit::before { top: 11%; left: 20%; }
.orbit::after { bottom: 6%; right: 27%; }
.orbit-two { inset: 18%; border-style: dashed; animation: spin 48s linear infinite reverse; }
.orbit-one { animation: spin 60s linear infinite; }
.hero-monogram { display: flex; align-items: baseline; font-family: var(--rounded); color: transparent; -webkit-text-stroke: 1px var(--line-strong); font-size: clamp(7rem, 16vw, 13rem); letter-spacing: -.12em; opacity: .74; }
.hero-monogram span:first-child { font-size: 1.28em; }
.hero-index { position: absolute; right: 0; bottom: 7%; display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: .58rem; letter-spacing: .15em; }
.hero-index div { width: 58px; height: 1px; background: var(--line-strong); }
.scroll-cue { position: absolute; bottom: 4%; left: 0; display: flex; align-items: center; gap: 15px; color: var(--muted); font-size: .58rem; letter-spacing: .17em; text-transform: uppercase; transform: rotate(-90deg) translateX(100%); transform-origin: left bottom; }
.scroll-cue i { display: block; width: 45px; height: 1px; background: var(--line-strong); }

.manifesto { min-height: 52vh; display: grid; place-items: center; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); text-align: center; }
.manifesto p { font-family: var(--serif); font-size: clamp(2rem, 5vw, 4.8rem); line-height: 1.18; letter-spacing: -.035em; }
.content-section { padding: 150px 0; }
.section-heading { display: grid; grid-template-columns: 55px 1fr; column-gap: 24px; margin-bottom: 80px; }
.section-number { color: var(--accent); font-family: var(--serif); font-size: .78rem; }
.section-heading > p { margin: 0; color: var(--muted); font-size: .65rem; letter-spacing: .18em; }
.section-heading h2 { grid-column: 2; margin: 20px 0 0; font-family: var(--serif); font-size: clamp(3.1rem, 7vw, 6.5rem); line-height: .95; font-weight: 400; letter-spacing: -.045em; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8%; padding-left: 79px; }
.about-statement p { margin: 0; font-family: var(--serif); font-size: clamp(1.8rem, 3.2vw, 3rem); line-height: 1.18; }
.about-body > p { margin: 0; color: var(--muted); font-size: 1rem; line-height: 1.9; }
.interest-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 35px; }
.interest-list span { padding: 8px 13px; border: 1px solid var(--line); color: var(--muted); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; }
.focus-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.focus-card { min-height: 330px; padding: 30px 25px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: transform .45s var(--ease), background .3s; }
.focus-card { background: linear-gradient(155deg, var(--surface-wash), transparent 62%); backdrop-filter: blur(2px); }
.focus-card:hover { background: var(--panel); transform: translateY(-6px); }
.focus-card > span { color: var(--accent); font-family: var(--serif); }
.focus-card h3 { margin: 100px 0 16px; font-family: var(--serif); font-weight: 400; font-size: 1.6rem; line-height: 1.1; }
.focus-card p { margin: 0; color: var(--muted); font-size: .82rem; }
.principles { border-top: 1px solid var(--line); }
.principle-list { list-style: none; margin: 0 0 0 79px; padding: 0; border-top: 1px solid var(--line); }
.principle-list li { display: grid; grid-template-columns: 80px 1fr; padding: 35px 0; border-bottom: 1px solid var(--line); }
.principle-list li > span { color: var(--accent); font-size: .65rem; letter-spacing: .14em; }
.principle-list h3 { margin: 0; font-family: var(--serif); font-size: clamp(1.45rem, 2.6vw, 2.5rem); font-weight: 400; }
.principle-list p { margin: 8px 0 0; color: var(--muted); }

.contact { min-height: 80vh; display: grid; grid-template-columns: 1fr 340px; gap: 10%; align-items: center; padding-top: 140px; padding-bottom: 140px; border-top: 1px solid var(--line); }
.contact-copy h2 { max-width: 800px; margin: 25px 0; font-family: var(--serif); font-size: clamp(3.1rem, 7vw, 6.5rem); font-weight: 400; line-height: .95; letter-spacing: -.05em; }
.contact-copy > p:not(.eyebrow) { color: var(--muted); max-width: 570px; }
.email-link { display: inline-flex; gap: 24px; align-items: center; margin-top: 22px; padding-bottom: 7px; border-bottom: 1px solid var(--accent); font-family: var(--rounded); font-size: clamp(1.15rem, 2vw, 1.65rem); }
.qr-card { padding: 28px; border: 1px solid var(--line); background: var(--panel); }
.qr-frame { padding: 15px; background: var(--qr-frame); }
.qr-frame img { display: block; width: 100%; height: auto; }
.qr-card strong { display: block; margin-top: 20px; font-family: var(--serif); font-size: 1.2rem; font-weight: 400; }
.qr-card p { margin: 3px 0 0; color: var(--muted); font-size: .72rem; }
.site-footer { min-height: 120px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-top: 1px solid var(--line); color: var(--muted); font-size: .65rem; letter-spacing: .07em; }
.footer-brand { color: var(--text); }
.back-top { justify-self: end; }
.noscript { position: fixed; bottom: 0; left: 0; right: 0; z-index: 100; margin: 0; padding: 10px; text-align: center; background: var(--accent); color: var(--bg); }

html[lang^="zh"] body { letter-spacing: .025em; line-height: 1.75; }
html[lang^="zh"] .hero-tagline { font-size: clamp(1.35rem, 2.2vw, 2.05rem); letter-spacing: .08em; }
html[lang^="zh"] .hero-intro { max-width: 530px; font-size: .88rem; }
html[lang^="zh"] .manifesto p { font-size: clamp(1.7rem, 4.2vw, 3.9rem); letter-spacing: .06em; line-height: 1.45; }
html[lang^="zh"] .section-heading h2 { font-size: clamp(2.65rem, 6vw, 5.5rem); letter-spacing: .04em; }
html[lang^="zh"] .about-statement p { font-size: clamp(1.55rem, 2.7vw, 2.55rem); letter-spacing: .04em; }
html[lang^="zh"] .about-body > p,
html[lang^="zh"] .principle-list p,
html[lang^="zh"] .contact-copy > p:not(.eyebrow) { font-size: .9rem; }
html[lang^="zh"] .focus-card h3 { font-size: 1.4rem; letter-spacing: .06em; }
html[lang^="zh"] .focus-card p { font-size: .78rem; }
html[lang^="zh"] .principle-list h3 { font-size: clamp(1.3rem, 2.25vw, 2.1rem); letter-spacing: .05em; }
html[lang^="zh"] .contact-copy h2 { font-size: clamp(2.65rem, 6vw, 5.5rem); letter-spacing: .04em; }
html[lang^="zh"] .brand,
html[lang^="zh"] .hero h1,
html[lang^="zh"] .hero-monogram,
html[lang^="zh"] .email-link,
html[lang^="zh"] .section-number,
html[lang^="zh"] .principle-list li > span { font-family: var(--rounded); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 900px) {
  .section-shell { width: min(100% - 36px, 720px); }
  .site-header { height: 68px; grid-template-columns: 1fr auto; padding: 0 18px; }
  .desktop-nav { display: none; }
  .menu-button { display: block; }
  .menu-button.active span:first-child { transform: translateY(3px) rotate(45deg); }
  .menu-button.active span:last-child { transform: translateY(-3px) rotate(-45deg); }
  .mobile-menu { position: fixed; inset: 68px 0 auto; z-index: 35; display: grid; background: var(--bg-elevated); border-bottom: 1px solid var(--line); transform: translateY(-120%); transition: transform .4s var(--ease); padding: 24px 18px; }
  .mobile-menu.open { transform: none; }
  .mobile-menu a { padding: 14px 0; border-bottom: 1px solid var(--line); font-family: var(--serif); font-size: 1.4rem; }
  .hero-copy { width: 100%; }
  .hero h1 { font-size: clamp(4.5rem, 20vw, 8rem); }
  .hero-orbit { width: 70vw; right: -30%; opacity: .55; }
  .hero-index, .scroll-cue { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 45px; padding-left: 0; }
  .focus-grid { grid-template-columns: repeat(2, 1fr); }
  .focus-card { min-height: 270px; }
  .focus-card h3 { margin-top: 65px; }
  .principle-list { margin-left: 0; }
  .contact { grid-template-columns: 1fr; }
  .qr-card { width: 300px; }
  .site-footer { grid-template-columns: 1fr auto; padding: 30px 0; }
  .site-footer > p { grid-row: 2; grid-column: 1 / -1; margin-bottom: 0; }
}

@media (max-width: 560px) {
  .brand > span:last-child { display: none; }
  .section-shell { width: calc(100% - 28px); }
  .hero { min-height: 800px; }
  .hero h1 { font-size: 4.3rem; line-height: .85; }
  .hero-tagline { font-size: 1.65rem; }
  .hero-actions { align-items: stretch; flex-direction: column; width: 100%; }
  .button { width: 100%; }
  .manifesto { min-height: 380px; }
  .content-section { padding: 105px 0; }
  .section-heading { grid-template-columns: 35px 1fr; column-gap: 10px; margin-bottom: 55px; }
  .section-heading h2 { font-size: 3.2rem; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-card { min-height: 230px; }
  .principle-list li { grid-template-columns: 48px 1fr; }
  .contact { padding-top: 100px; padding-bottom: 100px; }
  .contact-copy h2 { font-size: 3.2rem; }
  .email-link { font-size: 1rem; gap: 10px; }
  .qr-card { width: 100%; }
}

@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; }
}