:root {
  --paper: #f7f1e7;
  --paper-light: #fffaf2;
  --ink: #2e2924;
  --muted: #756b61;
  --line: #d9d0c3;
  --terracotta: #ef9c6c;
  --terracotta-deep: #a84d2e;
  --bean: #bdddC2;
  --max: 1180px;
  --serif: ui-serif, "Songti SC", "STSong", "Noto Serif CJK SC", Georgia, serif;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 1000; background: var(--ink); color: white; padding: 10px 16px; border-radius: 8px; }
.skip-link:focus { top: 12px; }
.section-shell { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }
.section-block { padding-block: 116px; }
.eyebrow { margin: 0 0 14px; color: var(--terracotta-deep); font-weight: 750; font-size: .75rem; letter-spacing: .16em; text-transform: uppercase; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 72px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 850; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; color: var(--paper-light); background: var(--ink); border-radius: 50%; font-family: var(--serif); font-style: italic; }
.site-nav { display: flex; gap: clamp(16px, 3vw, 34px); }
.site-nav a { position: relative; padding: 22px 2px; color: var(--muted); text-decoration: none; font-size: .9rem; font-weight: 650; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 17px; height: 2px; background: var(--terracotta-deep); transition: right .2s ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--ink); }
.site-nav a:hover::after, .site-nav a:focus-visible::after { right: 0; }

.hero { min-height: calc(100vh - 72px); display: grid; grid-template-columns: 1.18fr .82fr; align-items: center; gap: clamp(40px, 8vw, 110px); padding-block: 84px; }
.hero h1 { margin: 0; max-width: 760px; font-family: var(--serif); font-size: clamp(3.6rem, 7.3vw, 7.4rem); font-weight: 720; line-height: .99; letter-spacing: -.065em; }
.hero h1 em { color: var(--terracotta-deep); font-weight: inherit; }
.hero-lead { max-width: 600px; margin: 32px 0 0; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.2rem); }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 34px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; min-height: 48px; padding: 11px 20px; border-radius: 999px; text-decoration: none; font-size: .9rem; font-weight: 750; transition: transform .2s ease, background .2s ease, color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-dark { color: var(--paper-light); background: var(--ink); }
.button-outline { color: var(--terracotta-deep); border: 1px solid currentColor; }
.text-link { font-weight: 720; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.hero-art { position: relative; min-height: 430px; display: grid; place-items: center; isolation: isolate; }
.hero-art::before, .hero-art::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid var(--line); }
.hero-art::before { width: 320px; height: 320px; }
.hero-art::after { width: 220px; height: 220px; border-style: dashed; animation: spin 24s linear infinite; }
.maker-stamp { width: 150px; height: 150px; display: grid; place-items: center; align-content: center; color: var(--paper-light); background: var(--ink); border-radius: 44% 56% 51% 49% / 48% 43% 57% 52%; transform: rotate(-7deg); box-shadow: 18px 20px 0 var(--terracotta); }
.maker-stamp span, .maker-stamp small { font-size: .68rem; letter-spacing: .13em; }
.maker-stamp strong { font-family: var(--serif); font-size: 1.5rem; }
.orbit { position: absolute; z-index: 2; min-width: 66px; padding: 6px 12px; background: var(--paper-light); border: 1px solid var(--line); border-radius: 999px; text-align: center; font-size: .75rem; font-weight: 720; box-shadow: 0 8px 24px rgba(46,41,36,.08); }
.orbit-one { top: 10%; left: 12%; transform: rotate(-8deg); }
.orbit-two { top: 22%; right: 3%; transform: rotate(8deg); }
.orbit-three { bottom: 11%; left: 16%; transform: rotate(5deg); }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 36px; margin-bottom: 42px; }
.section-heading h2, .about-story h2, .contact-section h2 { margin: 0; font-family: var(--serif); font-size: clamp(2.4rem, 5vw, 4.8rem); line-height: 1.08; letter-spacing: -.045em; }
.section-heading > p { max-width: 360px; margin: 0 0 8px; color: var(--muted); }
.project-grid { display: grid; grid-template-columns: 1.18fr .82fr; gap: 24px; }
.project-card { position: relative; min-height: 520px; overflow: hidden; border-radius: 34px; display: grid; grid-template-rows: auto 1fr; transition: transform .25s ease, box-shadow .25s ease; }
.project-card:hover { transform: translateY(-5px); box-shadow: 0 24px 60px rgba(46,41,36,.12); }
.project-car { background: var(--terracotta); }
.project-game { background: var(--bean); }
.project-copy { position: relative; z-index: 2; padding: 36px 38px 20px; }
.project-status { margin: 0 0 26px; font-size: .76rem; font-weight: 750; }
.project-status span { display: inline-block; width: 7px; height: 7px; margin-right: 7px; background: currentColor; border-radius: 50%; }
.project-copy h3 { margin: 0 0 12px; font-family: var(--serif); font-size: clamp(2.1rem, 4vw, 4rem); line-height: 1.03; letter-spacing: -.04em; }
.project-copy > p:not(.project-status) { max-width: 400px; margin: 0; }
.project-note { display: inline-block; margin-top: 24px; padding: 7px 12px; border: 1px solid rgba(46,41,36,.35); border-radius: 999px; font-size: .72rem; font-weight: 700; }
.car-visual { position: relative; min-height: 230px; margin: 0 24px 24px; overflow: hidden; border-radius: 24px; background: #f7d4bb; }
.road-line { position: absolute; left: -10%; right: -10%; bottom: 36px; height: 6px; background: repeating-linear-gradient(90deg,var(--ink) 0 36px,transparent 36px 58px); transform: rotate(-5deg); opacity: .35; }
.gauge { position: absolute; left: 8%; top: 24%; width: 150px; height: 92px; display: grid; place-items: center; align-content: center; border: 10px solid var(--paper-light); border-bottom-color: transparent; border-radius: 120px 120px 28px 28px; transform: rotate(-4deg); }
.gauge span { font-family: var(--serif); font-size: 2.2rem; font-weight: 800; line-height: 1; }
.gauge small { font-size: .62rem; }
.receipt { position: absolute; right: 8%; top: 16%; width: 150px; padding: 18px; display: grid; gap: 8px; background: var(--paper-light); box-shadow: 10px 12px 0 rgba(46,41,36,.15); transform: rotate(5deg); }
.receipt span { font-size: .7rem; }
.game-visual { display: grid; align-items: end; justify-items: center; margin-top: -46px; }
.game-visual img { width: min(92%, 420px); aspect-ratio: 1; object-fit: cover; border-radius: 50% 50% 18px 18px; filter: saturate(.88) contrast(.96); transform: translateY(12%); transition: transform .3s ease; }
.project-game:hover .game-visual img { transform: translateY(9%) rotate(1deg); }

.tools-band { padding-block: 112px; background: var(--paper-light); border-block: 1px solid var(--line); }
.tool-preview-grid { display: grid; grid-template-columns: 1fr 1fr .78fr; gap: 14px; }
.tool-preview { min-height: 128px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; padding: 22px; color: inherit; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; text-decoration: none; transition: transform .2s ease, border-color .2s ease; }
.tool-preview:hover { transform: translateY(-3px); border-color: var(--terracotta-deep); }
.tool-icon { width: 46px; height: 46px; display: grid; place-items: center; color: var(--paper-light); background: var(--ink); border-radius: 13px; font-family: ui-monospace, monospace; font-weight: 850; }
.tool-preview strong, .tool-preview small { display: block; }
.tool-preview small { margin-top: 4px; color: var(--muted); font-size: .76rem; }
.tool-preview i { font-style: normal; font-size: 1.4rem; }
.tool-preview-more { border-style: dashed; }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(48px, 9vw, 130px); align-items: start; }
.about-story > p:not(.eyebrow) { max-width: 560px; color: var(--muted); font-size: 1.05rem; }
.capability-list { border-top: 1px solid var(--line); }
.capability-list div { display: grid; grid-template-columns: 44px 1fr; gap: 2px 14px; padding: 22px 4px; border-bottom: 1px solid var(--line); }
.capability-list span { grid-row: 1 / span 2; color: var(--terracotta-deep); font-size: .7rem; font-weight: 800; }
.capability-list strong { font-family: var(--serif); font-size: 1.35rem; }
.capability-list small { color: var(--muted); }

.contact-section { color: var(--paper-light); background: var(--ink); }
.contact-inner { padding-block: 116px; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .72fr); gap: clamp(42px, 8vw, 120px); align-items: center; }
.contact-copy > p:not(.eyebrow) { max-width: 560px; color: #cfc3b6; }
.official-account-card { display: grid; grid-template-columns: 142px 1fr; align-items: center; gap: 22px; padding: 18px; color: var(--ink); background: var(--paper-light); border-radius: 24px; box-shadow: 16px 18px 0 rgba(239,156,108,.72); }
.official-account-qr { width: 142px; height: 142px; overflow: hidden; border-radius: 16px; background: white; }
.official-account-qr img { width: auto; height: 142px; max-width: none; display: block; object-fit: cover; object-position: left center; }
.official-account-card p { margin: 0 0 7px; color: var(--terracotta-deep); font-size: .74rem; font-weight: 800; letter-spacing: .1em; }
.official-account-card strong, .official-account-card small { display: block; }
.official-account-card strong { font-family: var(--serif); font-size: 1.22rem; line-height: 1.2; }
.official-account-card small { margin-top: 12px; color: var(--muted); font-size: .72rem; line-height: 1.5; }
.contact-inner > p:not(.eyebrow) { max-width: 560px; color: #cfc3b6; }
.contact-section .eyebrow { color: var(--terracotta); }
.email-link { display: inline-flex; align-items: center; gap: 18px; margin-top: 24px; color: var(--terracotta); font-family: var(--serif); font-size: clamp(1.35rem, 3vw, 2.4rem); text-underline-offset: 7px; }
.site-footer { min-height: 86px; display: flex; align-items: center; justify-content: space-between; gap: 24px; color: var(--muted); font-size: .78rem; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@keyframes spin { to { transform: rotate(360deg); } }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid var(--terracotta-deep); outline-offset: 3px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-art { min-height: 340px; }
  .project-grid, .about-grid { grid-template-columns: 1fr; }
  .project-card { min-height: 470px; }
  .tool-preview-grid { grid-template-columns: 1fr 1fr; }
  .tool-preview-more { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .section-shell { width: min(100% - 28px, var(--max)); }
  .section-block, .tools-band, .contact-inner { padding-block: 76px; }
  .site-header { min-height: 64px; padding-inline: 14px; }
  .site-nav { gap: 12px; overflow-x: auto; }
  .site-nav a { padding-block: 18px; font-size: .78rem; }
  .brand > span:last-child { display: none; }
  .hero { padding-block: 58px 78px; gap: 22px; }
  .hero h1 { font-size: clamp(3.1rem, 16vw, 5rem); }
  .hero-lead { margin-top: 24px; }
  .hero-art { min-height: 310px; transform: scale(.88); }
  .section-heading { align-items: start; flex-direction: column; margin-bottom: 28px; }
  .project-card { min-height: 440px; border-radius: 24px; }
  .project-copy { padding: 28px 24px 16px; }
  .project-copy h3 { font-size: 2.5rem; }
  .tool-preview-grid { grid-template-columns: 1fr; }
  .tool-preview-more { grid-column: auto; }
  .contact-grid { grid-template-columns: 1fr; gap: 34px; }
  .official-account-card { grid-template-columns: 118px 1fr; padding: 14px; gap: 16px; }
  .official-account-qr { width: 118px; height: 118px; }
  .official-account-qr img { height: 118px; }
  .site-footer { padding-block: 24px; flex-direction: column; align-items: flex-start; gap: 6px; }
}

@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; }
}

@media (forced-colors: active) {
  .project-card, .tool-preview, .maker-stamp { border: 1px solid CanvasText; }
}