:root {
  --paper: #f4f0e8;
  --paper-deep: #e9e1d4;
  --ink: #171816;
  --muted: #68685f;
  --sage: #798775;
  --rose: #b87870;
  --line: rgba(23, 24, 22, 0.16);
  --card: rgba(255, 255, 255, 0.62);
  --shadow: 0 22px 60px rgba(56, 48, 39, 0.12);
  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 5%, rgba(184, 120, 112, 0.12), transparent 26rem),
    radial-gradient(circle at 3% 34%, rgba(121, 135, 117, 0.13), transparent 24rem),
    var(--paper);
  font-family: var(--sans);
  line-height: 1.75;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 70px;
  padding: 0 5vw;
  background: rgba(244, 240, 232, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand { text-decoration: none; letter-spacing: 0.12em; font-weight: 700; }
.brand small { margin-left: 0.6rem; color: var(--muted); font-weight: 400; letter-spacing: 0.04em; }
.nav { display: flex; gap: 1.5rem; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.menu-button { display: none; border: 0; background: transparent; cursor: pointer; }

.shell { width: min(1180px, 90vw); margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: clamp(2rem, 6vw, 7rem);
  align-items: center;
  min-height: calc(100vh - 70px);
  padding: 5rem 0;
}
.eyebrow { margin: 0 0 1rem; color: var(--rose); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.28; }
h1 { max-width: 9em; margin: 0; font-size: clamp(3rem, 7.5vw, 6.5rem); font-weight: 600; letter-spacing: -0.05em; }
h2 { margin: 0 0 1.2rem; font-size: clamp(2rem, 4vw, 3.7rem); font-weight: 600; letter-spacing: -0.035em; }
h3 { margin: 0 0 0.65rem; font-size: 1.45rem; }
.lede { max-width: 40rem; margin: 1.8rem 0; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.2rem); }
.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 1.25rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: white;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button.secondary { background: transparent; color: var(--ink); }

.hero-visual { position: relative; }
.hero-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  border-radius: 42% 42% 7% 7%;
  box-shadow: var(--shadow);
  background: #d8d1c8;
}
.hero-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 24%; }
.hero-note {
  position: absolute;
  right: -1.3rem;
  bottom: 2rem;
  width: min(16rem, 70%);
  padding: 1.2rem 1.35rem;
  background: rgba(249, 247, 241, 0.92);
  border: 1px solid rgba(255,255,255,.8);
  box-shadow: var(--shadow);
  transform: rotate(-2deg);
}
.hero-note strong { display: block; font-family: var(--serif); font-size: 1.25rem; }
.hero-note span { color: var(--muted); font-size: .85rem; }

.section { padding: clamp(4.5rem, 9vw, 8rem) 0; border-top: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: end; margin-bottom: 2.5rem; }
.section-head p { max-width: 35rem; margin: 0 0 .5rem auto; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: .65rem; }
.chip { padding: .55rem .9rem; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.34); color: var(--ink); font-size: .88rem; text-decoration: none; cursor: pointer; }
.chip:hover { border-color: var(--ink); }

.category-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; }
.category-card { min-height: 16rem; padding: 1.35rem; border: 1px solid var(--line); background: rgba(255,255,255,.42); text-decoration: none; transition: transform .2s ease, background .2s ease; }
.category-card:hover { transform: translateY(-4px); background: rgba(255,255,255,.72); }
.category-card span { color: var(--rose); font-size: .8rem; letter-spacing: .14em; }
.category-card h3 { margin-top: 3.5rem; }
.category-card p { color: var(--muted); font-size: .9rem; }

.feature-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 1.2rem; }
.feature-card, .mini-card, .principle, .contact-card {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: 0 10px 40px rgba(56,48,39,.06);
}
.feature-card { min-height: 33rem; padding: clamp(1.5rem, 4vw, 3.2rem); display: flex; flex-direction: column; justify-content: flex-end; }
.feature-card .number { margin-bottom: auto; color: var(--rose); font-size: .8rem; letter-spacing: .14em; }
.feature-card p { max-width: 40rem; color: var(--muted); }
.feature-card a { margin-top: 1rem; font-weight: 700; text-underline-offset: .35em; }
.stack { display: grid; gap: 1.2rem; }
.mini-card { padding: 1.5rem; }
.mini-card p { margin-bottom: 0; color: var(--muted); }
.mini-card a { display: inline-block; margin-top: 1rem; font-weight: 700; text-underline-offset: .3em; }
.meta { display: flex; gap: .8rem; color: var(--muted); font-size: .8rem; letter-spacing: .05em; }

.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.principle { min-height: 15rem; padding: 1.4rem; }
.principle b { display: inline-grid; place-items: center; width: 2.25rem; height: 2.25rem; margin-bottom: 2rem; border-radius: 50%; background: var(--ink); color: white; }
.principle p { color: var(--muted); }

.quote {
  max-width: 17em;
  margin: 0 auto;
  padding: 1rem 0;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5.8vw, 5.4rem);
  line-height: 1.35;
  text-align: center;
}
.quote em { color: var(--rose); font-style: normal; }

.ad-slot {
  display: grid;
  place-items: center;
  min-height: 110px;
  margin: 2rem 0;
  border: 1px dashed rgba(23,24,22,.28);
  color: var(--muted);
  background: rgba(255,255,255,.28);
  font-size: .76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.collab { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.contact-card { padding: clamp(1.5rem, 4vw, 3rem); }
.contact-card ul { padding-left: 1.2rem; color: var(--muted); }

.site-footer { padding: 3.5rem 5vw; border-top: 1px solid var(--line); }
.footer-grid { display: flex; justify-content: space-between; gap: 2rem; align-items: flex-end; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { color: var(--muted); font-size: .85rem; }

.article-shell { width: min(760px, 90vw); margin: 0 auto; }
.article-hero { padding: clamp(5rem, 11vw, 9rem) 0 3rem; }
.article-hero h1 { max-width: 14em; font-size: clamp(2.7rem, 6vw, 5.2rem); }
.article-cover { margin: 0 0 3.25rem; }
.article-cover img { display: block; width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 1.1rem; }
.article-body { padding-bottom: 7rem; }
.article-body h2 { margin-top: 4rem; font-size: 2rem; }
.article-body p, .article-body li { font-size: 1.08rem; }
.article-body blockquote { margin: 3rem 0; padding: 1.4rem 2rem; border-left: 3px solid var(--rose); background: rgba(255,255,255,.45); font-family: var(--serif); font-size: 1.35rem; }
.article-disclosure { margin: 2rem 0; padding: 1rem 1.2rem; border: 1px solid var(--line); background: rgba(121,135,117,.11); color: var(--muted); font-size: .9rem; }
.info-table { width: 100%; border-collapse: collapse; margin: 2rem 0; }
.info-table th, .info-table td { padding: .85rem 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.info-table th { width: 28%; color: var(--muted); font-weight: 500; }

.archive-shell { width: min(1050px, 90vw); margin: 0 auto; padding: clamp(4rem, 9vw, 7rem) 0; }
.archive-head { display: grid; grid-template-columns: 1.2fr .8fr; gap: 3rem; align-items: end; margin-bottom: 2.5rem; }
.archive-head h1 { max-width: 11em; font-size: clamp(2.8rem, 6vw, 5rem); }
.archive-head p { color: var(--muted); }
.search-panel { display: grid; grid-template-columns: 1fr auto; gap: .7rem; margin: 2rem 0; }
.search-panel input { min-width: 0; min-height: 48px; padding: 0 1rem; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.62); color: var(--ink); }
.article-list { display: grid; gap: 1rem; margin-top: 2rem; }
.article-row { display: grid; grid-template-columns: 8.5rem 9rem 1fr auto; gap: 1.5rem; align-items: center; padding: 1.2rem; border: 1px solid var(--line); background: var(--card); }
.article-thumb { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: .7rem; }
.article-row .article-kicker { color: var(--rose); font-size: .78rem; letter-spacing: .1em; }
.article-row h2 { margin: 0 0 .45rem; font-size: clamp(1.4rem, 2.8vw, 2rem); }
.article-row p { margin: 0; color: var(--muted); }
.article-row > a { font-weight: 700; white-space: nowrap; }
.result-note, .empty-state { color: var(--muted); }
.empty-state { display: none; padding: 2rem; border: 1px dashed var(--line); text-align: center; }
.empty-state.show { display: block; }

@media (max-width: 820px) {
  .brand small { display: none; }
  .menu-button { display: block; }
  .nav { display: none; position: absolute; top: 70px; left: 0; right: 0; padding: 1.2rem 5vw; background: var(--paper); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; }
  .nav.open { display: flex; }
  .hero, .section-head, .feature-grid, .collab, .archive-head { grid-template-columns: 1fr; }
  .hero { padding-top: 3rem; }
  .hero-visual { width: min(90%, 29rem); margin: 0 auto; }
  .method-grid { grid-template-columns: 1fr 1fr; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .article-row { grid-template-columns: 1fr; }
  .section-head p { margin-left: 0; }
  .footer-grid { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .method-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .hero-note { right: -.5rem; }
  .site-header { padding-inline: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}