:root {
  --ink: #0c1b22;
  --ink-soft: #14272f;
  --paper: #f5f0e6;
  --paper-deep: #e9e0d0;
  --gold: #b99a58;
  --gold-dark: #715a2d;
  --teal: #6e9a98;
  --text: #17262b;
  --muted: #5c6a6e;
  --line: #cfc3ad;
  --max: 1120px;
}

* { box-sizing: border-box; }

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 17px;
  line-height: 1.8;
}

a { color: var(--gold-dark); }
a:hover { color: #453715; }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  background: #fff;
  color: #111;
  padding: .55rem .8rem;
}
.skip-link:focus { top: 1rem; }

.site-header {
  background: var(--ink);
  color: #fff;
  border-bottom: 1px solid rgba(185, 154, 88, .55);
}

.nav-shell {
  width: min(var(--max), calc(100% - 2rem));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  color: #fff;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  font-family: Georgia, "Noto Serif TC", serif;
  font-size: 1.15rem;
  letter-spacing: .04em;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: "Noto Serif TC", serif;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 1.15rem;
}

.nav-links a {
  color: #d9e0df;
  text-decoration: none;
  font-size: .92rem;
}
.nav-links a[aria-current="page"],
.nav-links a:hover { color: #fff; }

.hero {
  background: var(--ink);
  color: #fff;
  padding: clamp(4rem, 9vw, 7.5rem) 0;
}

.shell {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}

.eyebrow {
  margin: 0 0 .8rem;
  color: var(--gold);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: Georgia, "Noto Serif TC", "PMingLiU", serif;
  line-height: 1.28;
  color: inherit;
}

h1 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2.65rem, 6vw, 5.6rem);
  font-weight: 500;
  letter-spacing: -.035em;
}

.hero-lead {
  max-width: 37rem;
  margin: 1.5rem 0 0;
  color: #cbd5d4;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
}

.hero-note {
  border-top: 1px solid rgba(185, 154, 88, .55);
  padding-top: 1.25rem;
  color: #bdc8c8;
  font-size: .95rem;
}

.hero-note strong {
  display: block;
  margin-bottom: .35rem;
  color: #fff;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: .65rem 1rem;
  border: 1px solid var(--gold);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: .9rem;
}
.button.primary {
  background: var(--gold);
  color: var(--ink);
}
.button:hover { color: #fff; background: rgba(185, 154, 88, .14); }
.button.primary:hover { color: var(--ink); background: #c9aa66; }

.section {
  padding: clamp(3.5rem, 7vw, 6rem) 0;
  border-bottom: 1px solid var(--line);
}
.section.dark {
  background: var(--ink-soft);
  color: #edf1ef;
  border-bottom-color: rgba(255,255,255,.12);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr);
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.section-heading h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 500;
}
.section-heading p {
  max-width: 44rem;
  margin: .25rem 0 0;
  color: var(--muted);
}
.dark .section-heading p { color: #bfc9c8; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.feature {
  padding: 1.5rem 1.4rem 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.feature + .feature {
  padding-left: 1.4rem;
  border-left: 1px solid var(--line);
}
.feature-index {
  color: var(--gold-dark);
  font: 700 .78rem/1 Georgia, serif;
}
.feature h3 {
  margin: .8rem 0 .55rem;
  font-size: 1.35rem;
}
.feature p { margin: 0; color: var(--muted); font-size: .95rem; }

.guide-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.guide-card {
  min-height: 255px;
  padding: 1.7rem;
  background: var(--paper);
  color: var(--text);
  text-decoration: none;
}
.guide-card:hover { background: #fffaf0; color: var(--text); }
.guide-card small {
  color: var(--gold-dark);
  font-weight: 700;
  letter-spacing: .08em;
}
.guide-card h3 {
  margin: .8rem 0;
  font-size: 1.65rem;
}
.guide-card p { color: var(--muted); }
.guide-card .read-more {
  display: inline-block;
  margin-top: .7rem;
  color: var(--gold-dark);
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .72fr);
  gap: clamp(2rem, 6vw, 5rem);
}
.prose { max-width: 760px; }
.prose h2 { margin: 2.6rem 0 1rem; font-size: 2rem; }
.prose h3 { margin: 2rem 0 .65rem; font-size: 1.35rem; }
.prose p { margin: 0 0 1.2rem; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { margin-bottom: .55rem; }
.prose blockquote {
  margin: 2rem 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--gold);
  background: #eee5d5;
}

.aside {
  align-self: start;
  padding: 1.4rem;
  border-top: 3px solid var(--gold);
  background: var(--paper-deep);
}
.aside h2, .aside h3 { margin-top: 0; font-size: 1.25rem; }
.aside ul { margin-bottom: 0; padding-left: 1.2rem; }

.article-hero {
  padding: clamp(3.2rem, 7vw, 6rem) 0 2.8rem;
  background: var(--ink);
  color: #fff;
}
.article-hero h1 {
  max-width: 18ch;
  font-size: clamp(2.4rem, 5vw, 4.6rem);
}
.article-meta {
  margin-top: 1.25rem;
  color: #bbc6c5;
  font-size: .9rem;
}
.article-body { padding: 3.5rem 0 5rem; }

.breadcrumbs {
  margin-bottom: 1.2rem;
  color: #b7c2c1;
  font-size: .88rem;
}
.breadcrumbs a { color: #d8c28e; }

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}
.principle {
  border-top: 1px solid var(--gold);
  padding-top: 1.2rem;
}
.principle h3 { margin: 0 0 .6rem; }
.principle p { margin: 0; color: #c3cdcc; }

.notice {
  padding: 1rem 1.15rem;
  background: #ece4d4;
  border: 1px solid var(--line);
  color: #4c442f;
}

.site-footer {
  background: #071217;
  color: #bbc5c4;
  padding: 3rem 0;
  font-size: .9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr .8fr;
  gap: 2rem;
}
.site-footer strong { color: #fff; }
.site-footer a { color: #d8c28e; }
.footer-links {
  display: grid;
  gap: .45rem;
}
.footer-note {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,.12);
  color: #8fa09e;
}

@media (max-width: 820px) {
  .nav-shell { align-items: flex-start; padding-block: 1rem; }
  .nav-links { gap: .55rem 1rem; }
  .hero-inner,
  .section-heading,
  .split { grid-template-columns: 1fr; }
  .feature-grid,
  .principles { grid-template-columns: 1fr; }
  .feature + .feature {
    padding-left: 0;
    border-left: 0;
  }
  .guide-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .nav-shell { display: block; }
  .nav-links { justify-content: flex-start; margin-top: .8rem; }
  h1 { font-size: 2.6rem; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}