:root {
  --bg: #f4efe6;
  --paper: #fffaf2;
  --ink: #1d262a;
  --muted: #607076;
  --accent: #2c6e63;
  --accent-2: #9d5b2e;
  --line: rgba(31, 47, 49, 0.12);
  --shadow: 0 20px 55px rgba(32, 43, 43, 0.08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(44, 110, 99, 0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(157, 91, 46, 0.10), transparent 24%),
    var(--bg);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 28px;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), #173d3c);
  color: #fff;
  font-weight: 700;
}
.brand strong { display: block; }
.brand small { color: var(--muted); }
.top-links { display: flex; gap: 16px; color: var(--muted); font-size: 14px; }
.page-wrap { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 24px 0 56px; }
.path-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 18px;
}
.hero, .page-hero, .viewer-card, .route-card, .concept-card, .plate-card, .reading-card, .callout, .glossary-card, .nav-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.hero, .page-hero {
  padding: 32px;
  margin-bottom: 28px;
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) 320px;
  gap: 24px;
  align-items: stretch;
}
.hero-panel {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.stat {
  padding: 18px;
  border-radius: 18px;
  background: rgba(44, 110, 99, 0.08);
  border: 1px solid rgba(44, 110, 99, 0.16);
}
.stat strong { display: block; font-size: 32px; margin-bottom: 6px; }
.eyebrow {
  color: var(--accent-2);
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 10px;
}
h1, h2, h3, .page-title {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  line-height: 1.18;
  margin: 0 0 12px;
}
h1 { font-size: clamp(34px, 5vw, 56px); }
h2, .page-title { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 22px; }
p { line-height: 1.72; color: #233035; }
.hero-text { font-size: 18px; }
.hero-note { color: var(--muted); max-width: 70ch; }
.section { margin-top: 26px; }
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  margin-bottom: 16px;
}
.search-input {
  width: min(520px, 100%);
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.74);
  font-size: 15px;
  margin-bottom: 18px;
}
.route-grid, .concept-grid, .plate-grid, .glossary-grid {
  display: grid;
  gap: 18px;
}
.route-grid { grid-template-columns: repeat(auto-fit, minmax(310px, 1fr)); }
.concept-grid { grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); }
.plate-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.glossary-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.route-card {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 16px;
  padding: 14px;
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.concept-card, .glossary-card, .nav-card { padding: 20px; }
.plate-card { overflow: hidden; }
.plate-card img {
  width: 100%;
  aspect-ratio: 1.28 / 1;
  object-fit: contain;
  background: #f5f1e9;
  padding: 12px;
}
.plate-copy { padding: 14px 16px 18px; display: grid; gap: 4px; }
.thumb, .mini-thumb {
  background: #f4efe7;
  border-radius: 18px;
  padding: 12px;
  border: 1px solid rgba(0,0,0,0.05);
}
.thumb img {
  width: 100%;
  aspect-ratio: 1.05 / 1;
  object-fit: contain;
}
.mini-thumb img {
  width: 100%;
  aspect-ratio: 1.25 / 1;
  object-fit: contain;
}
.route-copy, .subcell, .viewer-caption, .plate-copy, .glossary-card, .callout, .nav-card { min-width: 0; }
.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}
.pill {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(44, 110, 99, 0.10);
  color: var(--accent);
  font-weight: 600;
}
.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) 340px;
  gap: 22px;
}
.page-main > * + * { margin-top: 18px; }
.page-side { display: grid; gap: 16px; align-content: start; }
.viewer-card { overflow: hidden; }
.viewer-main {
  width: 100%;
  aspect-ratio: 1.2 / 1;
  object-fit: contain;
  background: #f3eee5;
  padding: 16px;
}
.viewer-caption { padding: 16px 18px 18px; }
.viewer-thumbs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.thumb-button {
  padding: 10px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--paper);
  cursor: pointer;
}
.thumb-button img {
  width: 100%;
  aspect-ratio: 1.1 / 1;
  object-fit: contain;
  background: #f3eee5;
  border-radius: 14px;
  padding: 8px;
}
.bullet-list, .ordered-list {
  padding-left: 20px;
  margin: 0;
  line-height: 1.8;
}
.stack, .side-plate-stack, .mini-plate-stack { display: grid; gap: 14px; }
.reading-card { padding: 20px; }
.kicker { font-size: 12px; letter-spacing: 0.1em; color: var(--accent-2); font-weight: 700; margin-bottom: 8px; }
.subgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.subcell, .callout {
  padding: 16px;
  border-radius: 18px;
  background: rgba(44, 110, 99, 0.06);
  border: 1px solid rgba(44, 110, 99, 0.10);
}
.qa-block {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(157, 91, 46, 0.06);
  border: 1px solid rgba(157, 91, 46, 0.14);
}
.qa-block summary { cursor: pointer; font-weight: 700; }
.chip-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.link-chip {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(29, 38, 42, 0.06);
  color: var(--ink);
  font-size: 14px;
}
.mini-plate, .side-plate {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  padding: 12px;
  border-radius: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
}
.mini-plate img, .side-plate img {
  width: 100%;
  aspect-ratio: 1.15 / 1;
  object-fit: contain;
  background: #f4efe7;
  border-radius: 14px;
  padding: 8px;
}
.full-plate {
  width: 100%;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: #f3eee5;
  padding: 14px;
}
.nav-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.nav-card span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.nav-card.muted { opacity: 0.65; }
[data-hidden="true"] { display: none !important; }
@media (max-width: 980px) {
  .hero, .page-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .page-wrap { width: min(100% - 24px, 1240px); }
  .site-top { padding: 14px 16px; }
  .route-card { grid-template-columns: 1fr; }
  .top-links { gap: 10px; font-size: 13px; }
  .nav-grid { grid-template-columns: 1fr; }
}