:root {
  color-scheme: light dark;
  --paper: #fff9f2;
  --cream: #fff5e5;
  --ink: #30252d;
  --muted: #75646e;
  --line: #d8c8c4;
  --accent: #9a4824;
  --button: #493247;
  --button-text: #fff5e5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 1.0625rem; line-height: 1.65; }
a { color: var(--accent); text-underline-offset: .22em; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: .14em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
.skip { position: absolute; top: 1rem; left: 1rem; transform: translateY(-180%); z-index: 1; padding: .7rem 1rem; background: var(--paper); }
.skip:focus { transform: none; }
.wrap { width: min(70rem, calc(100% - 3rem)); margin-inline: auto; }
.site-header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; min-height: 7rem; padding-block: 1rem; }
.wordmark { color: var(--ink); font-family: ui-rounded, -apple-system, BlinkMacSystemFont, sans-serif; font-size: 2rem; font-weight: 750; letter-spacing: -.055em; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem 1.25rem; }
nav a { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink); font-size: .9375rem; text-decoration: none; }
nav [aria-current="page"] { text-decoration: underline; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 14rem; gap: 3rem; align-items: center; padding-block: 5rem 6rem; }
.hero-icon { width: 100%; height: auto; }
.eyebrow { margin: 0 0 1.4rem; font-size: .8125rem; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
h1, h2, h3 { line-height: 1.15; text-wrap: balance; }
h1 { max-width: 13ch; margin: 0 0 1.6rem; font-size: clamp(2.8rem, 6.5vw, 5.6rem); font-weight: 650; letter-spacing: -.055em; overflow-wrap: anywhere; hyphens: auto; }
h2 { margin: 0 0 1rem; font-size: 1.7rem; letter-spacing: -.035em; }
h3 { margin: 0 0 .7rem; font-size: 1.2rem; letter-spacing: -.015em; }
p { margin: 0 0 1rem; }
.intro { max-width: 38rem; font-size: 1.25rem; color: var(--muted); }
.button { display: inline-flex; align-items: center; justify-content: center; max-width: 100%; min-height: 50px; margin-top: 1rem; padding: .65rem clamp(.5rem, 3vw, 1.25rem); border-radius: .85rem; color: var(--button-text); background: var(--button); text-decoration: none; font-weight: 600; }
.release-note { margin-top: 1rem; max-width: 36rem; font-size: .9rem; color: var(--muted); }
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem; padding-block: 2.5rem 4rem; border-top: 1px solid var(--line); }
.features p { color: var(--muted); }
.number { display: block; margin-bottom: 1.4rem; font-size: .8rem; font-weight: 600; color: var(--accent); }
.site-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; padding-block: 1.7rem; border-top: 1px solid var(--line); font-size: .875rem; color: var(--muted); }
.site-footer p { margin: 0; }
.document { max-width: 48rem; padding-block: 3rem 5rem; }
.document h1 { max-width: 100%; font-size: clamp(2.7rem, 5vw, 4.3rem); }
.contact { margin: 2rem 0 3rem; padding: 1.5rem; background: var(--cream); border-radius: 1rem; }
.contact a { display: inline-block; padding-block: .3rem; font-size: clamp(1.1rem, 4.5vw, 1.6rem); font-weight: 600; overflow-wrap: anywhere; }
.contact p:last-child { margin-bottom: 0; color: var(--muted); }
.faq { border-block: 1px solid var(--line); }
details + details { border-top: 1px solid var(--line); }
summary { padding-block: 1.25rem; font-weight: 600; cursor: pointer; }
details p { padding: 0 1.25rem .75rem; color: var(--muted); }
.document section + section { margin-top: 2.5rem; }
.review-banner { padding: 1rem; background: var(--cream); border: 2px solid var(--accent); border-radius: .5rem; }
.document li { margin-block: .65rem; }
html[lang="zh-Hans"] h1 { max-width: 12ch; letter-spacing: -.035em; }
html[lang="zh-Hans"] .eyebrow { letter-spacing: .08em; }
@media (max-width: 680px) {
  .wrap { width: min(70rem, calc(100% - 2.5rem)); }
  .site-header { min-height: 6rem; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 2rem; padding-block: 2rem 3.5rem; }
  .hero-icon { width: 5.5rem; grid-row: 1; }
  .features { grid-template-columns: 1fr; gap: 1.8rem; padding-block: 2rem; }
  .number { margin-bottom: .7rem; }
  .intro { font-size: 1.1rem; }
  .document { padding-block: 2rem 3rem; }
  .site-footer { display: block; }
  .site-footer p + p { margin-top: .5rem; }
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #231e25; --cream: #40313b; --ink: #fff5e5; --muted: #c2afbb; --line: #534450; --accent: #f4b28c; --button: #ef925f; --button-text: #30252d; }
}