:root {
  --paper: #f3ecda;
  --card: #faf6ec;
  --ink: #1c1b18;
  --ink-2: #6b665c;
  --hairline: #e2d9c3;
  --accent: #174531;
  --serif: "Iowan Old Style", "Palatino", "Songti SC", "Songti TC", "Hiragino Mincho ProN", "AppleMyungjo", "Noto Serif CJK SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans", "Apple SD Gothic Neo", "Noto Sans CJK SC", system-ui, sans-serif;
  color-scheme: light dark;
}
:lang(zh-Hant), :lang(zh-HK) { --serif: "Iowan Old Style", "Palatino", "Songti TC", "Noto Serif CJK TC", serif; --sans: -apple-system, "PingFang TC", "Noto Sans CJK TC", system-ui, sans-serif; }
:lang(zh-HK) { --sans: -apple-system, "PingFang HK", "PingFang TC", "Noto Sans CJK HK", system-ui, sans-serif; }
:lang(ja) { --serif: "Iowan Old Style", "Hiragino Mincho ProN", "Noto Serif CJK JP", serif; --sans: -apple-system, "Hiragino Sans", "Noto Sans CJK JP", system-ui, sans-serif; }
:lang(ko) { --serif: "Iowan Old Style", "AppleMyungjo", "Noto Serif CJK KR", serif; --sans: -apple-system, "Apple SD Gothic Neo", "Noto Sans CJK KR", system-ui, sans-serif; }
@media (prefers-color-scheme: dark) {
  :root { --paper: #171612; --card: #201f1a; --ink: #ece7da; --ink-2: #a39d8f; --hairline: #2e2c25; --accent: #8fbf9f; }
  .feature img { opacity: .92; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.65 var(--sans); }
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }

.header { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: 1080px; margin: 0 auto; padding: 20px 24px; }
.brand { display: inline-flex; color: var(--ink); }
.wordmark { height: 24px; width: auto; }
.nav { display: flex; align-items: center; gap: 20px; font-size: 15px; }
.nav > a { text-decoration: none; color: var(--ink-2); }
.nav > a:hover, .nav > a[aria-current] { color: var(--ink); }
.languages { position: relative; }
.languages summary { list-style: none; cursor: pointer; color: var(--ink-2); }
.languages summary::-webkit-details-marker { display: none; }
.languages summary::after { content: " ▾"; font-size: 11px; }
.languages ul { position: absolute; right: 0; top: calc(100% + 8px); z-index: 2; margin: 0; padding: 6px; list-style: none; min-width: 172px; background: var(--card); border: 1px solid var(--hairline); border-radius: 12px; box-shadow: 0 12px 32px rgb(0 0 0 / .12); }
.languages li a { display: block; padding: 7px 12px; border-radius: 8px; text-decoration: none; }
.languages li a:hover { background: var(--paper); }
.languages li a[aria-current] { font-weight: 600; }

.home { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.hero { text-align: center; padding: 72px 0 56px; }
.hero h1 { font: 600 clamp(38px, 6.4vw, 64px)/1.18 var(--serif); letter-spacing: -.01em; margin: 0 0 24px; }
.hero p { max-width: 600px; margin: 0 auto 32px; color: var(--ink-2); font-size: 18px; }
.availability { display: inline-block; padding: 10px 20px; border-radius: 999px; background: var(--ink); color: var(--paper); font-size: 15px; font-weight: 500; }

.feature { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 56px; padding: 40px 0; }
.feature:nth-of-type(odd) img { order: 2; }
.feature img { border-radius: 28px; }
.feature h2 { font: 600 clamp(28px, 3.6vw, 40px)/1.25 var(--serif); margin: 0 0 14px; }
.feature p { margin: 0; color: var(--ink-2); font-size: 18px; }

.offer { text-align: center; margin: 64px 0 96px; padding: 56px 24px; background: var(--card); border-radius: 28px; }
.offer h2 { font: 600 clamp(26px, 3.4vw, 36px)/1.3 var(--serif); margin: 0 0 14px; }
.offer p { max-width: 560px; margin: 0 auto; color: var(--ink-2); }

.doc { max-width: 680px; margin: 0 auto; padding: 40px 24px 80px; }
.doc h1 { font: 600 clamp(32px, 5vw, 42px)/1.25 var(--serif); margin: 0 0 8px; }
.doc h2 { font: 600 21px/1.4 var(--serif); margin: 40px 0 10px; }
.doc p { margin: 0 0 14px; }
.doc .updated { color: var(--ink-2); font-size: 15px; margin-bottom: 32px; }
.doc .link { margin: 4px 0; }
.doc .link a, .doc .email a { color: var(--accent); text-underline-offset: 3px; }
.doc .email { font-size: 20px; margin: 20px 0 8px; }

.footer { max-width: 1080px; margin: 0 auto; padding: 32px 24px 48px; border-top: 1px solid var(--hairline); color: var(--ink-2); font-size: 14px; }
.footer nav { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-bottom: 12px; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--ink); }
.footer p { margin: 4px 0; }

@media (max-width: 760px) {
  body { font-size: 16px; }
  .header { padding: 16px; }
  .wordmark { height: 20px; }
  .home { padding: 0 16px; }
  .hero { padding: 40px 0 32px; }
  .hero p, .feature p { font-size: 16px; }
  .feature { grid-template-columns: 1fr; gap: 20px; padding: 28px 0; }
  .feature:nth-of-type(odd) img { order: 0; }
  .feature img { border-radius: 20px; }
  .offer { margin: 40px 0 64px; padding: 40px 20px; border-radius: 20px; }
  .doc { padding: 24px 16px 64px; }
  .footer { padding: 24px 16px 40px; }
}