:root {
  --bg: #f5efe5;
  --paper: #fffdf9;
  --ink: #2c241a;
  --muted: #6e604e;
  --line: #d8c8b3;
  --accent: #a44a2a;
  --accent-soft: #edd8c5;
  --gold: #b38849;
  --shadow: 0 18px 40px rgba(83, 56, 30, 0.10);
  --serif: "Songti SC", "Noto Serif SC", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
  --content: 1180px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--sans);
  background:
    radial-gradient(circle at top left, rgba(179, 136, 73, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(164, 74, 42, 0.10), transparent 24%),
    linear-gradient(180deg, #f8f2e8 0%, #f3eadf 48%, #f7f2e8 100%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.page-shell { min-height: 100vh; padding: 22px 18px 64px; }
.container { max-width: var(--content); margin: 0 auto; }
.site-header {
  max-width: var(--content);
  margin: 0 auto 18px;
  padding: 16px 20px;
  border: 1px solid rgba(184, 143, 97, 0.34);
  border-radius: 999px;
  background: rgba(255, 252, 247, 0.78);
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 24px rgba(88, 60, 30, 0.07);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  position: sticky;
  top: 14px;
  z-index: 12;
}
.brand { display: flex; flex-direction: column; gap: 4px; }
.brand strong { font-family: var(--serif); font-size: 1.02rem; }
.brand span { color: var(--muted); font-size: 0.84rem; }
.site-nav { display: flex; gap: 8px; flex-wrap: wrap; }
.site-nav a { padding: 9px 13px; border-radius: 999px; color: var(--muted); font-size: 0.92rem; }
.site-nav a.active, .site-nav a:hover { background: var(--accent); color: #fff; }
.hero, .panel, .card, .side-panel, .act-panel {
  background: rgba(255, 252, 247, 0.94);
  border: 1px solid rgba(184, 143, 97, 0.28);
  border-radius: 28px;
  box-shadow: var(--shadow);
}
.hero {
  padding: 34px 32px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  right: -60px;
  bottom: -80px;
  background: radial-gradient(circle, rgba(164, 74, 42, 0.18), transparent 68%);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.9fr);
  gap: 26px;
}
.eyebrow, .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(237, 216, 197, 0.86);
  color: var(--accent);
  font-size: 0.84rem;
}
.hero h1, .page-title {
  margin: 14px 0 10px;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  line-height: 1.06;
}
.hero p, .lede, .card p { color: var(--muted); line-height: 1.84; }
.chips, .badge-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 9px 13px;
  border-radius: 999px;
  background: #faf4ec;
  border: 1px solid rgba(184, 143, 97, 0.30);
  color: var(--gold);
  font-size: 0.9rem;
}
.hero-quote { padding: 22px; }
.hero-quote blockquote {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.1rem;
  line-height: 1.85;
}
.hero-quote footer { margin-top: 16px; color: var(--muted); font-size: 0.88rem; }
.section { margin-top: 24px; }
.section-header { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.section-header h2, .panel h2, .panel h3, .side-panel h3 { margin: 0; font-family: var(--serif); }
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card, .panel, .side-panel, .act-panel { padding: 22px; }
.chapter-list, .concept-list, .plate-list { display: grid; gap: 16px; }
.chapter-list, .concept-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.plate-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.thumb-frame {
  background: linear-gradient(180deg, #fffaf4, #f2e3d2);
  border-radius: 22px;
  padding: 12px;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(184, 143, 97, 0.24);
}
.thumb-frame img { max-height: 100%; object-fit: contain; border-radius: 12px; }
.route-pill { display: inline-flex; margin-top: 12px; color: var(--gold); font-size: 0.88rem; }
.search-bar {
  display: flex;
  gap: 10px;
  padding: 14px 16px;
  border-radius: 20px;
  border: 1px solid rgba(184, 143, 97, 0.30);
  background: rgba(255, 251, 246, 0.92);
}
.search-bar input { width: 100%; border: 0; background: transparent; outline: none; font: inherit; }
.path-panel { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 0.9rem; margin-bottom: 12px; }
.path-panel a { color: var(--accent); }
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) 340px;
  gap: 20px;
  align-items: start;
}
.main-col, .side-col { display: grid; gap: 16px; }
.thesis-box {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(255, 248, 240, 0.95), rgba(237, 216, 197, 0.55));
  border: 1px solid rgba(164, 74, 42, 0.12);
}
.thesis-box strong { display: block; margin-bottom: 8px; color: var(--accent); }
.dense-list, .mini-list { display: grid; gap: 10px; margin: 0; padding-left: 18px; line-height: 1.8; }
.quote-card, .aside-card, .route-group {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 251, 246, 0.90);
  border: 1px solid rgba(184, 143, 97, 0.24);
}
.quote-card h4, .aside-card h4, .route-group h4 { margin: 0 0 8px; font-family: var(--serif); }
.aside-stack { display: grid; gap: 12px; }
.pager { display: flex; gap: 12px; flex-wrap: wrap; }
.pager a {
  flex: 1 1 240px;
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255, 251, 246, 0.90);
  border: 1px solid rgba(184, 143, 97, 0.28);
}
.pager span { display: block; color: var(--muted); font-size: 0.84rem; }
.pager strong { display: block; margin-top: 6px; line-height: 1.5; }
.qa details {
  border-radius: 18px;
  background: rgba(255, 251, 246, 0.92);
  border: 1px solid rgba(184, 143, 97, 0.26);
  padding: 16px 18px;
}
.qa summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.footer-note { margin-top: 22px; color: var(--muted); font-size: 0.88rem; line-height: 1.75; }
.term-grid { display: grid; gap: 14px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
[data-hidden="true"] { display: none !important; }
@media (max-width: 960px) {
  .hero-grid, .page-layout, .chapter-list, .concept-list, .plate-list, .grid.two, .grid.three, .term-grid { grid-template-columns: 1fr; }
  .site-header { flex-direction: column; align-items: flex-start; border-radius: 28px; }
}