:root {
  --ink: #17312f;
  --muted: #60706c;
  --paper: #f4f2ec;
  --card: #fffefa;
  --accent: #16766b;
  --accent-soft: #dcebe6;
  --gold: #b98737;
  --line: #d4dbd6;
  --danger: #984239;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 68px 96px;
  background: radial-gradient(circle at top right, #dfebe6 0, var(--paper) 28rem);
  color: var(--ink);
  font: 16px/1.72 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

h1 {
  max-width: 13ch;
  margin: 0 0 1.4rem;
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -.045em;
}

h2 {
  margin: 3.8rem 0 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 1.75rem;
  letter-spacing: -.02em;
}

h3 {
  margin: 2.3rem 0 .8rem;
  color: var(--accent);
  font-size: 1.18rem;
}

p, li { max-width: 80ch; }

blockquote {
  margin: 2rem 0;
  padding: 1.25rem 1.45rem;
  border-left: 5px solid var(--accent);
  background: var(--accent-soft);
  font-size: 1.16rem;
  font-weight: 650;
}

code {
  padding: .16rem .38rem;
  border-radius: 5px;
  background: #e7ebe7;
  color: #244944;
}

pre {
  overflow: auto;
  padding: 1.2rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #18322f;
  color: #edf4f1;
}

pre code { padding: 0; background: transparent; color: inherit; }

table {
  width: 100%;
  margin: 1.35rem 0 2rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 12px;
  background: var(--card);
  font-size: .92rem;
}

th {
  background: #1e4a45;
  color: white;
  font-weight: 650;
  text-align: left;
}

th, td {
  padding: .78rem .82rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

tr:last-child td { border-bottom: 0; }
th:last-child, td:last-child { border-right: 0; }
tbody tr:nth-child(even) { background: #f7f8f4; }

a { color: var(--accent); text-underline-offset: 3px; }
strong { color: #102d29; }
hr { margin: 3rem 0; border: 0; border-top: 1px solid var(--line); }

body > p:first-of-type { color: var(--muted); }

body > ul:first-of-type {
  padding: 1rem 1.25rem 1rem 2.3rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}

#title-block-header {
  margin: -56px -68px 38px;
  padding: 70px 68px 48px;
  background: linear-gradient(135deg, #123a35, #1c5d54);
  color: white;
}

#title-block-header h1 { max-width: 14ch; margin: 0; color: white; }

#TOC {
  margin: 0 0 2.4rem;
  padding: 1.3rem 1.4rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 254, 250, .88);
}

#TOC::before {
  display: block;
  margin-bottom: .65rem;
  color: var(--gold);
  content: "货架决策目录";
  font-weight: 750;
  letter-spacing: .12em;
}

#TOC ul { margin: 0; columns: 2; column-gap: 2.2rem; }
#TOC li { break-inside: avoid; }

@media (max-width: 760px) {
  body { padding: 32px 18px 70px; }
  #title-block-header { margin: -32px -18px 26px; padding: 48px 18px 34px; }
  #TOC ul { columns: 1; }
  h1 { max-width: none; }
  table { display: block; overflow-x: auto; white-space: normal; }
  th, td { min-width: 132px; }
}

@media print {
  body { max-width: none; padding: 20mm; background: white; color: black; }
  h2 { break-before: page; }
  table, blockquote, pre { break-inside: avoid; }
}