:root {
  --paper: #f3efe6;
  --paper-2: #e8e1d5;
  --ink: #181411;
  --muted: #706a62;
  --line: rgba(24, 20, 17, .18);
  --signal: #ef4a24;
  --signal-soft: #ffb49f;
  --white: #fffdf8;
  --max: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .28;
  background-image: radial-gradient(rgba(24, 20, 17, .2) .65px, transparent .65px);
  background-size: 7px 7px;
}
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
h1, h2, h3, p { overflow-wrap: break-word; }
.sr-only, .skip-link { 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:focus { z-index: 100; width: auto; height: auto; padding: 12px 18px; margin: 10px; clip: auto; background: var(--ink); color: white; }
.section-shell { width: min(calc(100% - 64px), var(--max)); margin-inline: auto; }

.site-header {
  width: min(calc(100% - 64px), var(--max));
  height: 96px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 30;
  border-bottom: 1px solid var(--ink);
}
.brand { display: flex; align-items: center; gap: 11px; font-size: 16px; font-weight: 800; letter-spacing: .1em; }
.brand-logo { width: 43px; height: 43px; display: block; position: relative; overflow: hidden; flex: 0 0 43px; background-color: var(--paper); background-image: url("yuanke-logo-192.webp"), radial-gradient(rgba(24, 20, 17, .2) .65px, transparent .65px); background-position: -9px -12px, 0 0; background-size: 62px 62px, 7px 7px; background-repeat: no-repeat, repeat; background-blend-mode: multiply, normal; }
.brand-logo img { display: none; }
.main-nav { display: flex; align-items: center; gap: 34px; font-size: 13px; font-weight: 650; }
.main-nav a:not(.nav-cta) { position: relative; }
.main-nav a:not(.nav-cta)::after { content: ""; position: absolute; height: 2px; left: 0; right: 100%; bottom: -8px; background: var(--signal); transition: right .25s; }
.main-nav a:not(.nav-cta):hover::after { right: 0; }
.nav-cta { padding: 13px 20px; border-radius: 3px; background: var(--ink); color: var(--white); transition: background .2s, transform .2s; }
.nav-cta:hover { background: var(--signal); transform: translateY(-2px); }
.menu-button { display: none; width: 46px; height: 46px; padding: 12px; border: 1px solid var(--ink); background: transparent; }
.menu-button span { display: block; height: 2px; margin: 5px 0; background: var(--ink); transition: transform .2s; }

.eyebrow, .section-label, .product-number {
  margin: 0;
  font: 750 11px/1.3 "SFMono-Regular", Consolas, monospace;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.hero {
  min-height: 760px;
  padding-block: 72px 90px;
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  align-items: center;
  gap: 72px;
}
.eyebrow { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; color: var(--signal); }
.eyebrow span { width: 44px; height: 2px; background: currentColor; }
h1, h2, h3, blockquote { font-weight: 850; letter-spacing: -.06em; }
h1 { max-width: 650px; margin: 0; font-size: clamp(62px, 7.2vw, 112px); line-height: .91; }
.hero h1 { font-size: clamp(62px, 5.9vw, 88px); }
h1 em, h2 em, blockquote em { color: var(--signal); font-style: normal; }
.hero-lead { max-width: 530px; margin: 35px 0 38px; color: var(--muted); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 27px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 38px; min-width: 208px; padding: 17px 20px; border: 1px solid var(--ink); border-radius: 3px; font-size: 13px; font-weight: 700; transition: color .2s, background .2s, transform .2s; }
.button-dark { color: white; background: var(--ink); }
.button-dark span { color: var(--signal-soft); font-size: 18px; }
.button:hover { color: white; background: var(--signal); border-color: var(--signal); transform: translateY(-3px); }
.text-link { display: inline-flex; align-items: center; gap: 10px; padding-bottom: 5px; border-bottom: 1px solid; font-size: 13px; font-weight: 700; }
.text-link span { transition: transform .2s; }
.text-link:hover span { transform: translateX(6px); }

.hero-art { min-height: 575px; position: relative; overflow: hidden; background: var(--ink); border-radius: 4px; box-shadow: 22px 22px 0 var(--signal-soft); }
.hero-art::before {
  content: "";
  width: 360px;
  height: 360px;
  position: absolute;
  left: 50%;
  top: 49%;
  transform: translate(-50%, -50%);
  background: url("yuanke-logo-1024.webp") center/contain no-repeat;
  box-shadow: 12px 12px 0 var(--signal);
}
.hero-art::after { content: "YUANKE / 2026"; position: absolute; left: 28px; bottom: 26px; color: rgba(255,255,255,.52); font: 10px/1 monospace; letter-spacing: .17em; }
.orbit { position: absolute; z-index: 1; border: 2px solid var(--signal); border-radius: 10px; transform: rotate(-32deg); }
.orbit-one { width: 74%; height: 82px; top: 11%; left: -27%; }
.orbit-two { width: 64%; height: 70px; right: -21%; bottom: 10%; border-color: var(--paper); }
.hero-card { position: absolute; z-index: 2; width: 210px; min-height: 126px; padding: 20px; display: flex; flex-direction: column; border-radius: 3px; box-shadow: none; }
.hero-card .card-index { font: 10px/1 monospace; letter-spacing: .12em; opacity: .55; }
.hero-card strong { margin-top: auto; font-size: 22px; letter-spacing: -.01em; }
.hero-card small { margin-top: 4px; font-size: 11px; opacity: .64; }
.card-galileo { left: 24px; bottom: 92px; background: var(--white); transform: none; color: var(--ink); }
.card-yingji { right: 24px; top: 24px; background: var(--signal); color: white; transform: none; }
.route-line, .location-pulse { display: none; }
.art-note { position: absolute; right: 29px; bottom: 26px; margin: 0; color: white; font: 9px/1.5 monospace; letter-spacing: .15em; text-align: right; }

.manifesto { padding: 124px 0; color: var(--white); background: var(--ink); }
.manifesto-grid { display: grid; grid-template-columns: .75fr 2.25fr; gap: 50px; }
.manifesto .section-label { color: var(--signal-soft); }
.manifesto blockquote { margin: 0; font-size: clamp(40px, 5vw, 74px); line-height: 1.16; }
.products { padding-block: 130px; }
.section-heading { margin-bottom: 75px; display: grid; grid-template-columns: 1.3fr .7fr; align-items: end; gap: 60px; }
.section-heading h2, .about h2, .contact h2 { margin: 24px 0 0; font-size: clamp(48px, 6vw, 86px); line-height: .98; }
.section-heading > p { max-width: 430px; margin: 0; color: var(--muted); line-height: 1.85; }
.product { min-height: 640px; margin-top: 32px; display: grid; grid-template-columns: .82fr 1.18fr; overflow: hidden; border: 1px solid var(--ink); border-radius: 4px; }
.product-copy { padding: 58px; display: flex; flex-direction: column; align-items: flex-start; }
.product-copy h3 { margin: 30px 0 0; font-size: clamp(60px, 6.5vw, 96px); line-height: .9; }
.product-subtitle { margin: 12px 0 25px; font-weight: 750; }
.product-copy > p:not([class]) { max-width: 410px; color: rgba(255,255,255,.65); line-height: 1.85; }
.product-copy .text-link { margin-top: auto; }
.feature-list { width: 100%; margin: 24px 0 32px; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.18); }
.feature-list li { padding: 14px 0; display: grid; grid-template-columns: 98px 1fr; border-bottom: 1px solid rgba(255,255,255,.18); color: rgba(255,255,255,.62); font-size: 13px; }
.feature-list span { color: white; font-weight: 750; }
.product-galileo, .product-yingji { color: white; background: var(--ink); }
.galileo-visual { padding: 62px; display: grid; place-items: center; background: var(--signal); }
.dash-window { width: 100%; max-width: 650px; min-height: 405px; color: var(--ink); background: var(--white); border: 1px solid var(--ink); border-radius: 3px; box-shadow: 14px 14px 0 var(--ink); transform: rotate(-2deg); }
.dash-top { height: 43px; padding: 0 15px; display: flex; align-items: center; gap: 7px; border-bottom: 1px solid var(--line); }
.dash-top i { width: 7px; height: 7px; border-radius: 50%; background: var(--ink); opacity: .35; }
.dash-top span { margin-left: auto; font: 9px monospace; letter-spacing: .13em; }
.dash-body { min-height: 360px; display: grid; grid-template-columns: 70px 1fr; }
.dash-sidebar { padding: 34px 20px; background: var(--ink); }
.dash-sidebar b { display: block; height: 5px; margin-bottom: 24px; background: rgba(255,255,255,.25); }
.dash-sidebar b:first-child { background: var(--signal); }
.dash-content { padding: 34px; }
.dash-content p { font-weight: 750; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.metrics i { height: 58px; border: 1px solid var(--line); background: var(--paper); }
.chart { height: 130px; margin-top: 20px; padding: 0 16px; display: flex; gap: 12px; align-items: end; border-bottom: 1px solid var(--line); }
.chart span { flex: 1; height: 35%; background: var(--signal); }
.chart span:nth-child(2) { height: 60%; }.chart span:nth-child(3) { height: 47%; }.chart span:nth-child(4) { height: 78%; }.chart span:nth-child(5) { height: 66%; }.chart span:nth-child(6) { height: 88%; }.chart span:nth-child(7) { height: 72%; }
.dash-table { margin-top: 20px; }.dash-table i { display: block; height: 8px; margin: 12px 0; background: var(--line); }
.product-yingji { background: var(--white); color: var(--ink); }
.product-yingji .product-copy > p:not([class]), .product-yingji .feature-list li { color: var(--muted); }
.product-yingji .feature-list { border-color: var(--line); }
.product-yingji .feature-list li { border-color: var(--line); }
.product-yingji .feature-list span { color: var(--ink); }
.yingji-visual { min-height: 620px; position: relative; overflow: hidden; background: var(--paper-2); border-left: 1px solid var(--ink); }
.map-grid { position: absolute; inset: 0; opacity: .65; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 54px 54px; transform: rotate(-9deg) scale(1.2); }
.trail { position: absolute; inset: 15% 10%; border: 2px dashed var(--signal); border-radius: 48% 52% 62% 38%; transform: rotate(-15deg); }
.trail i { position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--signal); }
.trail i:nth-child(1) { left: 2%; top: 60%; }.trail i:nth-child(2) { left: 24%; top: 1%; }.trail i:nth-child(3) { right: 18%; top: 8%; }.trail i:nth-child(4) { right: -1%; top: 60%; }.trail i:nth-child(5) { left: 46%; bottom: -2%; box-shadow: 0 0 0 8px rgba(239,74,36,.18); }
.watch { width: 250px; height: 300px; padding: 14px; position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%) rotate(-7deg); border-radius: 56px; background: #141210; box-shadow: 18px 24px 45px rgba(24,20,17,.28), inset 0 0 0 3px #49443f; }
.watch::before, .watch::after { content: ""; width: 145px; height: 140px; position: absolute; z-index: -1; left: 52px; background: #27231f; }
.watch::before { bottom: 88%; border-radius: 28px 28px 4px 4px; }.watch::after { top: 88%; border-radius: 4px 4px 28px 28px; }
.watch-crown { width: 12px; height: 46px; position: absolute; right: -10px; top: 72px; border-radius: 0 7px 7px 0; background: #38322d; }
.watch-face { height: 100%; padding: 28px 16px; display: flex; flex-direction: column; align-items: center; color: white; border-radius: 44px; background: radial-gradient(circle at 50% 45%, #2a211e, #080706 70%); }
.watch-time { align-self: flex-start; color: rgba(255,255,255,.5); font-size: 11px; }
.watch-pin { width: 75px; height: 75px; margin: 30px 0 18px; display: grid; place-items: center; border: 1px solid rgba(239,74,36,.5); border-radius: 50%; box-shadow: 0 0 0 14px rgba(239,74,36,.08); }
.watch-pin i { width: 20px; height: 20px; border-radius: 50%; background: var(--signal); }
.watch-face strong { font-size: 16px; }.watch-face small { margin-top: 8px; color: rgba(255,255,255,.5); font-size: 10px; }
.coord { position: absolute; padding: 8px 11px; color: white; background: var(--ink); font: 10px monospace; box-shadow: 5px 5px 0 var(--signal); }
.coord-one { left: 8%; top: 16%; }.coord-two { right: 7%; bottom: 12%; }

.about { padding: 125px 0; background: var(--signal-soft); }
.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 90px; }
.about-copy { padding-top: 40px; }
.about-copy > p { max-width: 620px; color: #4f423b; font-size: 18px; line-height: 1.9; }
.values { margin-top: 52px; border-top: 1px solid rgba(24,20,17,.3); }
.values div { padding: 19px 0; display: flex; gap: 38px; border-bottom: 1px solid rgba(24,20,17,.3); }
.values b { color: var(--signal); font: 12px monospace; }
.contact { padding-block: 125px; }
.contact-main { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.contact-main h2 { margin-bottom: 22px; }
.round-link { width: 112px; height: 112px; flex: 0 0 112px; display: grid; place-items: center; color: white; background: var(--signal); border-radius: 4px; font-size: 42px; transition: transform .25s; }
.round-link:hover { transform: rotate(-8deg) scale(1.04); }
.contact-email { display: inline-block; margin-top: 42px; padding-bottom: 5px; border-bottom: 1px solid; font-size: 18px; }
.site-footer { padding: 60px max(32px, calc((100vw - var(--max)) / 2)); display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 44px; color: white; background: var(--ink); }
.footer-brand { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 1px 12px; }
.footer-brand .brand-logo { grid-row: 1/3; width: 43px; height: 43px; background: url("yuanke-logo-192.webp") -9px -12px / 62px 62px no-repeat; filter: invert(1); mix-blend-mode: screen; }
.footer-brand .brand-logo img { display: none; }
.footer-brand strong { letter-spacing: .1em; }.footer-brand small { color: rgba(255,255,255,.46); font: 9px monospace; letter-spacing: .15em; }
.footer-links { display: flex; gap: 28px; font-size: 12px; }
.footer-links a:hover { color: var(--signal-soft); }
.site-footer > p { grid-column: 1/-1; margin: 0; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.45); font-size: 11px; }

.page-hero { padding-block: 100px 85px; border-bottom: 1px solid var(--ink); }
.page-hero .section-label { margin-bottom: 30px; color: var(--signal); }
.page-hero h1 { max-width: 960px; }
.page-hero > p:last-child { max-width: 680px; margin: 35px 0 0; color: var(--muted); font-size: 18px; line-height: 1.85; }
.legal-layout { padding-block: 82px 125px; display: grid; grid-template-columns: 250px minmax(0, 760px); gap: 100px; }
.legal-aside { color: var(--muted); font-size: 12px; line-height: 1.8; }
.legal-aside strong { display: block; margin-bottom: 8px; color: var(--ink); }
.legal-content h2 { margin: 58px 0 18px; font-size: 31px; letter-spacing: -.035em; }
.legal-content h2:first-child { margin-top: 0; }
.legal-content p, .legal-content li { color: #57514b; line-height: 1.9; }
.legal-content li { margin-bottom: 8px; }.legal-content a { text-decoration: underline; text-decoration-color: var(--signal); text-underline-offset: 4px; }
.notice { margin: 32px 0; padding: 22px 25px; background: var(--signal-soft); font-size: 14px; line-height: 1.7; }
.support-grid { padding-block: 76px 45px; display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.support-card { min-height: 270px; padding: 30px; display: flex; flex-direction: column; border: 1px solid var(--ink); border-radius: 3px; transition: color .2s, background .2s, transform .2s; }
.support-card:hover { color: white; background: var(--ink); transform: translateY(-5px); }
.support-card b { color: var(--signal); font: 11px monospace; }.support-card h2 { margin: 45px 0 12px; font-size: 30px; letter-spacing: -.04em; }.support-card p { color: var(--muted); line-height: 1.7; }.support-card:hover p { color: rgba(255,255,255,.6); }.support-card span { margin-top: auto; font-size: 13px; font-weight: 700; }
.faq { max-width: 830px; padding-block: 70px 125px; }.faq h2 { margin: 18px 0 42px; font-size: 48px; letter-spacing: -.05em; }.faq details { padding: 24px 0; border-top: 1px solid var(--ink); }.faq details:last-child { border-bottom: 1px solid var(--ink); }.faq summary { display: flex; justify-content: space-between; cursor: pointer; list-style: none; font-weight: 750; }.faq summary::after { content: "+"; color: var(--signal); font-size: 21px; font-weight: 400; }.faq details[open] summary::after { content: "−"; }.faq details p { max-width: 700px; color: var(--muted); line-height: 1.8; }
.product-page { min-height: calc(100vh - 96px); display: grid; grid-template-columns: 1fr 1fr; }
.product-page-copy { padding: 9vw max(32px, calc((100vw - var(--max)) / 2)); padding-right: 6vw; }
.product-page-copy .section-label { color: var(--signal); }.product-page-copy h1 { margin: 26px 0; }.product-page-copy > p { max-width: 550px; color: var(--muted); font-size: 18px; line-height: 1.85; }
.product-page-visual { min-height: 650px; padding: 60px; display: grid; place-items: center; border-left: 1px solid var(--ink); }
.product-page-visual.galileo { background: var(--signal); }.product-page-visual.yingji { position: relative; overflow: hidden; background: var(--paper-2); }
.product-page .feature-list { margin-top: 45px; color: var(--ink); border-color: var(--line); }.product-page .feature-list li { color: var(--muted); border-color: var(--line); }.product-page .feature-list span { color: var(--ink); }
.reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media (max-width: 900px) {
  .section-shell, .site-header { width: min(calc(100% - 36px), var(--max)); }
  .site-header { height: 82px; }
  .menu-button { display: block; }
  .main-nav { display: none; position: absolute; top: 81px; left: 0; right: 0; padding: 25px; align-items: flex-start; flex-direction: column; gap: 24px; color: white; background: var(--ink); border-bottom: 4px solid var(--signal); }
  .main-nav.is-open { display: flex; }.main-nav .nav-cta { padding: 0; color: var(--signal-soft); background: none; }
  .hero { grid-template-columns: 1fr; gap: 55px; }.hero-copy { padding-top: 20px; }.hero-art { min-height: 560px; }
  .manifesto-grid, .section-heading, .about-grid { grid-template-columns: 1fr; gap: 34px; }
  .product { grid-template-columns: 1fr; }.product-copy { min-height: 570px; }.yingji-visual { border-left: 0; border-top: 1px solid var(--ink); }
  .support-grid { grid-template-columns: 1fr; }.support-card { min-height: 220px; }.legal-layout { grid-template-columns: 1fr; gap: 48px; }.product-page { grid-template-columns: 1fr; }.product-page-copy { padding-block: 85px; }.product-page-visual { min-height: 580px; border-left: 0; border-top: 1px solid var(--ink); }
}
@media (max-width: 560px) {
  .section-shell, .site-header { width: min(calc(100% - 28px), var(--max)); }.site-header { height: 74px; }.brand-logo { width: 39px; height: 39px; flex-basis: 39px; }.main-nav { top: 73px; }
  .hero { min-height: auto; padding: 56px 0 74px; }.hero-copy { padding: 0; }.hero-lead { font-size: 15px; }.hero-actions { align-items: flex-start; flex-direction: column; }.hero-art { min-height: 440px; box-shadow: 10px 10px 0 var(--signal-soft); }.hero-art::before { width: 280px; height: 280px; }.hero-card { width: 165px; min-height: 105px; padding: 15px; }.hero-card strong { font-size: 18px; }.card-galileo { left: 14px; bottom: 70px; }.card-yingji { top: 14px; right: 14px; }.art-note { display: none; }
  .manifesto, .about { padding: 82px 0; }.products, .contact { padding-block: 82px; }.section-heading { margin-bottom: 52px; }.product-copy { min-height: 540px; padding: 38px 25px; }.galileo-visual { min-height: 430px; padding: 28px 15px; }.dash-window { min-height: 330px; box-shadow: 8px 8px 0 var(--ink); }.dash-body { min-height: 286px; grid-template-columns: 44px 1fr; }.dash-sidebar { padding: 28px 12px; }.dash-content { padding: 24px 16px; }.yingji-visual { min-height: 500px; }.watch { transform: translate(-50%,-50%) rotate(-7deg) scale(.86); }
  .about-copy { padding-top: 0; }.about-copy > p { font-size: 16px; }.contact-main { align-items: flex-start; flex-direction: column; }.round-link { width: 80px; height: 80px; flex-basis: 80px; }.site-footer { grid-template-columns: 1fr; }.footer-links { flex-wrap: wrap; }.site-footer > p { grid-column: auto; }.page-hero { padding-block: 68px; }.legal-layout { padding-block: 58px 90px; }.product-page-visual { min-height: 480px; padding: 24px; }
}