:root {
  color-scheme: light;
  --ink: #2f241f;
  --muted: #6f625b;
  --paper: #fffdf8;
  --surface: #ffffff;
  --line: #eadfd3;
  --brand: #76533d;
  --brand-soft: #f1e5d7;
  --accent: #be7a45;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: radial-gradient(circle at top right, #f7e7d5 0, transparent 30rem), var(--paper); line-height: 1.8; }
a { color: var(--brand); }
.site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 1rem; max-width: 1120px; margin: 0 auto; padding: 1rem 1.5rem; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(18px); border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent); }
.brand { display: flex; align-items: center; gap: .7rem; color: var(--ink); font-weight: 800; text-decoration: none; letter-spacing: .01em; }
.brand-mark { display: grid; place-items: center; width: 2.35rem; height: 2.35rem; border-radius: .8rem; color: white; background: linear-gradient(135deg, var(--brand), var(--accent)); box-shadow: 0 8px 24px #76533d33; }
nav { display: flex; gap: .3rem; }
nav a { padding: .55rem .8rem; border-radius: .75rem; color: var(--muted); text-decoration: none; font-size: .95rem; font-weight: 650; }
nav a:hover, nav a[aria-current="page"] { color: var(--brand); background: var(--brand-soft); }
main { width: min(100% - 2rem, 920px); margin: 0 auto; }
.hero { padding: 5.5rem 1rem 3rem; text-align: center; }
.hero.home { padding-bottom: 4rem; }
.eyebrow { margin: 0 0 .7rem; color: var(--accent); font-size: .78rem; font-weight: 850; letter-spacing: .18em; }
h1 { margin: 0; font-size: clamp(2.1rem, 7vw, 4rem); line-height: 1.15; letter-spacing: -.04em; }
.hero > p:last-child { max-width: 650px; margin: 1.2rem auto 0; color: var(--muted); font-size: 1.08rem; }
.document { margin-bottom: 5rem; padding: clamp(1.4rem, 5vw, 3.6rem); border: 1px solid var(--line); border-radius: 1.5rem; background: var(--surface); box-shadow: 0 24px 70px #50301912; }
.document h2 { margin: 2.8rem 0 .7rem; padding-top: .4rem; color: var(--brand); font-size: 1.4rem; line-height: 1.35; }
.document h2:first-child { margin-top: 0; }
.document h3 { color: var(--ink); font-size: 1.1rem; }
.document p, .document li { color: #4d413a; }
.document ul { padding-left: 1.4rem; }
.document li { margin: .45rem 0; }
.document strong { color: var(--ink); }
.document code { padding: .15rem .35rem; border-radius: .35rem; background: #f5eee7; font-size: .9em; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 6rem; }
.card { display: flex; min-height: 270px; flex-direction: column; padding: 1.5rem; color: var(--ink); text-decoration: none; border: 1px solid var(--line); border-radius: 1.4rem; background: var(--surface); box-shadow: 0 16px 45px #5030190d; transition: transform .2s ease, box-shadow .2s ease; }
.card:hover { transform: translateY(-5px); box-shadow: 0 22px 55px #5030191c; }
.card-icon { display: grid; place-items: center; width: 3rem; height: 3rem; border-radius: 1rem; color: white; background: linear-gradient(135deg, var(--brand), var(--accent)); font-weight: 850; }
.card h2 { margin: 1.2rem 0 .5rem; font-size: 1.25rem; }
.card p { margin: 0; color: var(--muted); }
.arrow { margin-top: auto; padding-top: 1.5rem; color: var(--brand); font-weight: 750; }
footer { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: .5rem 1.2rem; padding: 2.5rem 1rem 3rem; color: var(--muted); border-top: 1px solid var(--line); font-size: .9rem; }
footer p { margin: 0; }
@media (max-width: 720px) {
  .site-header { align-items: flex-start; padding: .8rem 1rem; }
  .brand > span:last-child { display: none; }
  nav { gap: 0; }
  nav a { padding: .45rem .55rem; font-size: .84rem; }
  .hero { padding-top: 4rem; }
  .cards { grid-template-columns: 1fr; }
  .card { min-height: 220px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }