:root {
  color-scheme: light;
  --paper: #f4f1eb;
  --paper-raised: #fffdf8;
  --ink: #171714;
  --ink-soft: #56544e;
  --line: #cbc6bb;
  --line-strong: #171714;
  --signal: #ff5a00;
  --signal-soft: #ffe2d2;
  --focus: #0b68ff;
  --shadow: rgba(23, 23, 20, .12);
  --display: STSong, SimSun, "Songti SC", serif;
  --body: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #11110f;
  --paper-raised: #1a1a17;
  --ink: #f5f1e8;
  --ink-soft: #b9b4aa;
  --line: #3d3a34;
  --line-strong: #f5f1e8;
  --signal: #ff6a1a;
  --signal-soft: #4b2514;
  --focus: #82b4ff;
  --shadow: rgba(0, 0, 0, .42);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; min-width: 320px; background: var(--paper); color: var(--ink); font-family: var(--body); line-height: 1.65; }
a { color: inherit; text-underline-offset: .2em; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: -80px; padding: 10px 14px; color: #fff; background: var(--focus); border-radius: 4px; }
.skip-link:focus { top: 16px; }
.page-shell { width: min(1440px, 100%); margin: 0 auto; padding-inline: clamp(20px, 4vw, 64px); }
.site-header { height: 92px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .18em; text-decoration: none; }
.brand img { border-radius: 50%; object-fit: cover; box-shadow: 0 6px 18px var(--shadow); }
.site-nav { justify-self: end; display: flex; align-items: center; gap: clamp(16px, 2.5vw, 34px); }
.site-nav a { position: relative; color: var(--ink-soft); font-size: 14px; text-decoration: none; }
.site-nav a[aria-current="page"], .site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -9px; height: 2px; background: var(--signal); }
.nav-toggle { display: none; }
.theme-toggle, .nav-toggle { border: 1px solid var(--line); background: var(--paper-raised); color: var(--ink); border-radius: 999px; min-width: 44px; min-height: 44px; cursor: pointer; }
.hero { min-height: min(760px, calc(100vh - 92px)); display: grid; grid-template-columns: minmax(0, 1.16fr) minmax(350px, .84fr); align-items: center; gap: clamp(48px, 9vw, 140px); border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 18px; color: var(--signal); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
h1, h2 { margin: 0; font-family: var(--display); font-weight: 700; line-height: 1.13; text-wrap: balance; }
.hero h1 { font-size: clamp(50px, 6.6vw, 102px); letter-spacing: -.055em; }
.hero h1 em { color: var(--signal); font-style: normal; }
.lede { max-width: 650px; margin: 30px 0 0; color: var(--ink-soft); font-size: clamp(17px, 1.4vw, 21px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0 22px; border: 1px solid var(--line-strong); border-radius: 999px; font-weight: 700; text-decoration: none; }
.button.primary { color: #fff; background: var(--signal); border-color: var(--signal); }
.button.quiet { background: transparent; }
.track-card { position: relative; padding: clamp(24px, 3vw, 42px); color: var(--paper); background: var(--ink); border-radius: 2px 48px 2px 2px; transform: rotate(1.2deg); box-shadow: 22px 22px 0 var(--signal-soft); }
:root[data-theme="dark"] .track-card { color: var(--ink); background: var(--paper-raised); border: 1px solid var(--line); }
.track-card::before { content: ""; position: absolute; inset: 14px; border: 1px dashed color-mix(in srgb, var(--paper) 35%, transparent); border-radius: 0 36px 0 0; pointer-events: none; }
.track-head { position: relative; display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 24px; border-bottom: 1px solid currentColor; }
.track-head span { opacity: .72; }
.track-head strong { color: var(--signal); font-family: var(--display); font-size: 25px; }
.track-card ol { position: relative; list-style: none; margin: 0; padding: 12px 0 0; }
.track-card li { display: grid; grid-template-columns: 42px 1fr auto; gap: 12px; align-items: center; padding: 16px 0; border-bottom: 1px solid color-mix(in srgb, currentColor 22%, transparent); }
.track-card li:last-child { border: 0; }
.track-card b { color: var(--signal); }
.track-card i { opacity: .68; font-style: normal; font-variant-numeric: tabular-nums; }
.statement { display: grid; grid-template-columns: .3fr 1fr .7fr; gap: clamp(28px, 5vw, 80px); padding: clamp(90px, 12vw, 180px) 0; border-bottom: 1px solid var(--line); }
.statement > p:first-child { color: var(--signal); font-weight: 800; }
.statement h2 { font-size: clamp(38px, 4vw, 64px); }
.statement > p:last-child { align-self: end; color: var(--ink-soft); }
.feature-grid, .prose-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-bottom: 1px solid var(--line); }
.feature-grid article, .prose-grid article { min-height: 330px; padding: clamp(34px, 5vw, 72px); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.feature-grid article:nth-child(2n), .prose-grid article:nth-child(2n) { border-right: 0; }
.feature-grid article:last-child { grid-column: 2; }
.feature-grid span { color: var(--signal); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.feature-grid h2, .prose-grid h2 { max-width: 590px; margin-top: 40px; font-size: clamp(31px, 3vw, 49px); }
.feature-grid p, .prose-grid p { max-width: 590px; color: var(--ink-soft); }
.identity { margin: clamp(64px, 10vw, 140px) 0; padding: clamp(36px, 6vw, 80px); background: var(--signal-soft); border-left: 8px solid var(--signal); }
.identity h2 { font-size: clamp(36px, 4.4vw, 66px); }
.page-hero, .legal-hero { padding: clamp(80px, 11vw, 160px) 0 clamp(60px, 8vw, 110px); border-bottom: 1px solid var(--line); }
.page-hero h1, .legal-hero h1, .not-found h1 { max-width: 950px; font-size: clamp(54px, 7vw, 105px); letter-spacing: -.04em; }
.page-hero > p:last-child, .legal-hero > p:last-child { max-width: 760px; margin: 32px 0 0; color: var(--ink-soft); font-size: 19px; }
.legal-layout { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: clamp(40px, 7vw, 100px); padding: clamp(56px, 8vw, 110px) 0; }
.legal-index { align-self: start; position: sticky; top: 30px; display: grid; gap: 10px; }
.legal-index p { font-weight: 800; }
.legal-index a { color: var(--ink-soft); font-size: 13px; text-decoration: none; }
.legal-copy { max-width: 840px; }
.legal-copy section { position: relative; padding: 0 0 58px 70px; scroll-margin-top: 24px; }
.legal-copy section > span { position: absolute; left: 0; top: 5px; color: var(--signal); font-weight: 800; }
.legal-copy h2 { font-size: clamp(28px, 3vw, 42px); }
.legal-copy p { color: var(--ink-soft); }
.contact-card { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin: clamp(56px, 8vw, 110px) 0; background: var(--line); border: 1px solid var(--line); }
.contact-card > div { padding: clamp(34px, 5vw, 70px); background: var(--paper-raised); }
.contact-mail { display: block; overflow-wrap: anywhere; font-family: var(--display); font-size: clamp(25px, 3vw, 42px); }
.request-list { list-style: none; margin: 0; padding: 0; }
.request-list li { display: flex; gap: 18px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.request-list span { width: 72px; color: var(--signal); font-size: 12px; font-weight: 800; }
.not-found { min-height: 65vh; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.not-found p { color: var(--ink-soft); }
.site-footer { display: grid; grid-template-columns: 1fr auto minmax(250px, .55fr); gap: 36px; padding: 48px 0; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }
.site-footer strong { color: var(--ink); letter-spacing: .16em; }
.footer-links { display: grid; gap: 4px; }
.operator { margin: 0; }
@keyframes reveal-in { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.reveal { animation: reveal-in .42s ease-out both; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 820px) {
  .page-shell { padding-inline: 18px; }
  .site-header { height: 76px; grid-template-columns: auto 1fr auto auto; }
  .brand img { width: 38px; height: 38px; }
  .nav-toggle { display: block; justify-self: end; padding-inline: 14px; }
  .site-nav { display: none; position: absolute; z-index: 20; top: 70px; left: 18px; right: 18px; padding: 18px; background: var(--paper-raised); border: 1px solid var(--line); box-shadow: 0 16px 40px var(--shadow); }
  .site-nav.is-open { display: grid; gap: 0; }
  .site-nav a { min-height: 45px; display: flex; align-items: center; border-bottom: 1px solid var(--line); }
  .site-nav a:last-child { border: 0; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding: 76px 0 90px; }
  .track-card { margin-right: 12px; }
  .statement { grid-template-columns: 45px 1fr; }
  .statement > p:last-child { grid-column: 2; }
  .feature-grid, .prose-grid, .contact-card { grid-template-columns: 1fr; }
  .feature-grid article, .prose-grid article { min-height: 250px; border-right: 0; }
  .feature-grid article:last-child { grid-column: auto; }
  .legal-layout { grid-template-columns: 1fr; }
  .legal-index { position: static; grid-template-columns: repeat(2, 1fr); padding-bottom: 28px; border-bottom: 1px solid var(--line); }
  .legal-index p { grid-column: 1 / -1; }
  .legal-copy section { padding-left: 42px; }
  .site-footer { grid-template-columns: 1fr; }
}

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