:root {
  --bg: #f8f3ea;
  --paper: #fffdf8;
  --ink: #2b241d;
  --muted: #706454;
  --line: #d9cfbe;
  --accent: #8a4f2f;
  --accent-2: #c58e4f;
  --shadow: 0 18px 48px rgba(65, 45, 28, 0.08);
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(197, 142, 79, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(138, 79, 47, 0.12), transparent 24%),
    linear-gradient(180deg, #fbf7ef 0%, #f7f0e6 100%);
  color: var(--ink);
}
a { color: inherit; text-decoration: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 18px;
  padding: 14px 28px;
  backdrop-filter: blur(12px);
  background: rgba(252, 248, 241, 0.92);
  border-bottom: 1px solid rgba(139, 111, 84, 0.16);
}
.topbar a { font-size: 14px; color: var(--muted); }
.page-wrap { max-width: 1240px; margin: 0 auto; padding: 34px 20px 64px; }
.hero {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 22px;
  margin-bottom: 28px;
}
.card, .data-card, .side-panel, .plate-card, .case-card, .gloss-card, .source-item-deep, .mini-case, .viewer, .section-card {
  background: var(--paper);
  border: 1px solid rgba(128, 112, 92, 0.16);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card, .data-card, .side-panel, .viewer, .section-card { padding: 22px; }
.hero-title { font-size: clamp(34px, 5vw, 56px); line-height: 1.04; margin: 8px 0 12px; }
.lead { color: var(--muted); font-size: 18px; line-height: 1.75; }
.eyebrow, .meta, .tag { color: var(--muted); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; }
.quote-box { margin-top: 18px; padding: 18px 20px; background: linear-gradient(135deg, #fff9f1, #f7ede1); border-radius: 18px; border: 1px dashed rgba(138, 79, 47, 0.26); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 18px 0 28px; }
.stat { padding: 20px; text-align: center; background: rgba(255, 253, 248, 0.88); border: 1px solid rgba(128,112,92,0.15); border-radius: 18px; box-shadow: var(--shadow); }
.stat strong { display: block; font-size: 32px; margin-bottom: 8px; }
.section { margin-top: 34px; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 16px; margin-bottom: 16px; }
.section-head h2, .page-head h1 { margin: 0; font-size: 32px; }
.section-head p, .page-meta { margin: 6px 0 0; color: var(--muted); }
.grid-3, .grid-4, .plate-grid, .concept-grid, .case-grid, .gloss-grid {
  display: grid;
  gap: 16px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4, .plate-grid { grid-template-columns: repeat(4, 1fr); }
.concept-grid { grid-template-columns: repeat(2, 1fr); }
.case-grid { grid-template-columns: repeat(3, 1fr); }
.gloss-grid { grid-template-columns: repeat(3, 1fr); }
.path-card, .case-card, .plate-card, .gloss-card, .source-item-deep, .mini-case { padding: 18px; }
.path-card h3, .case-card h3, .plate-card h3 { margin: 8px 0 10px; font-size: 20px; line-height: 1.35; }
.path-card p, .case-card p, .plate-card p, .gloss-card p { margin: 0; color: var(--muted); line-height: 1.7; }
.tag-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.tag { padding: 4px 10px; border-radius: 999px; background: #f3eadb; }
.thumb {
  height: 204px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: linear-gradient(180deg, #faf5ed, #efe2cf);
  overflow: hidden;
}
.thumb img, .plate-card img, .viewer-main {
  max-width: 100%;
  max-height: 100%;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(138, 79, 47, 0.25);
  background: #fffaf2;
  color: var(--accent);
  margin-top: 14px;
  cursor: pointer;
}
.btn.primary { background: var(--accent); color: white; }
.page-head { margin-bottom: 22px; }
.page-columns, .case-layout { display: grid; grid-template-columns: 1.3fr 0.8fr; gap: 22px; }
.bullet-list, .route-list { margin: 0; padding-left: 20px; line-height: 1.8; color: var(--ink); }
.answer-box { display: none; margin-top: 12px; padding: 14px; border-radius: 16px; background: #f7efe3; color: var(--ink); }
.viewer { padding: 18px; }
.viewer-main { width: 100%; height: 520px; border-radius: 18px; background: #f4efe6; }
.thumb-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 12px; }
.thumb-strip button {
  border: 0;
  background: #f4efe6;
  border-radius: 14px;
  padding: 6px;
  cursor: pointer;
  height: 82px;
}
.thumb-strip img { width: 100%; height: 100%; object-fit: contain; }
.mini-case-list, .plate-mini { display: grid; gap: 12px; }
.mini-case { padding: 14px 16px; }
.source-item-deep h4, .mini-case strong { margin: 0 0 8px; }
.source-item-deep p, .mini-case .meta { color: var(--muted); line-height: 1.7; margin: 0; }
.search-bar input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  font-size: 16px;
  background: white;
}
.filter-row { display: flex; gap: 10px; flex-wrap: wrap; }
.filter-btn {
  border: 1px solid rgba(128,112,92,0.2);
  background: white;
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
}
.filter-btn.active { background: var(--accent); color: white; border-color: var(--accent); }
.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 28px;
}
.pager a, .pager span {
  min-height: 68px;
  border-radius: 18px;
  padding: 16px 18px;
  background: rgba(255, 253, 248, 0.92);
  border: 1px solid rgba(128,112,92,0.16);
}
.home-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 22px; }
.home-side { display: grid; gap: 22px; }
.home-cover { height: 420px; }
.muted { color: var(--muted); }
@media (max-width: 1000px) {
  .hero, .home-grid, .page-columns, .case-layout { grid-template-columns: 1fr; }
  .grid-3, .grid-4, .plate-grid, .concept-grid, .case-grid, .gloss-grid, .stats { grid-template-columns: 1fr; }
  .thumb-strip { grid-template-columns: repeat(2, 1fr); }
  .viewer-main { height: 380px; }
}