/* 第1套 根域名 · 图书馆编目卡 Catalog */
:root {
  --paper: #f3ead8;
  --card: #fff8ec;
  --ink: #2a2118;
  --muted: #6a5b48;
  --amber: #b7791f;
  --navy: #2c3d52;
  --line: #d4c4a4;
  --chip: #efe2c8;
  --ok: #2f6b4f;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: auto; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(ellipse at 8% 0%, rgba(183, 121, 31, 0.08), transparent 40%),
    repeating-linear-gradient(90deg, transparent, transparent 47px, rgba(44, 61, 82, 0.03) 48px),
    var(--paper);
  font-family: "Palatino Linotype", "Book Antiqua", "Songti SC", "STSong", "SimSun", Georgia, serif;
  font-size: 17px;
  line-height: 1.8;
}

img, svg { display: inline-block; vertical-align: middle; }
a { color: var(--navy); text-underline-offset: 0.18em; }
a:hover { color: var(--amber); }
.wrap { width: min(1080px, calc(100% - 2rem)); margin: 0 auto; }

.mast {
  background: var(--card);
  border-bottom: 3px double var(--navy);
}
.mast-inner { padding: 1.1rem 0 0; }
.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  color: var(--navy);
  font-weight: 700;
  letter-spacing: 0.22em;
  text-decoration: none;
  font-size: 1.15rem;
}
.brand svg { width: 28px; height: 28px; }
.mast-note {
  text-align: center;
  margin: 0.35rem 0 0.8rem;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
}
.tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  border-top: 1px solid var(--line);
}
.tabs a {
  min-width: 8rem;
  padding: 0.7rem 1.1rem;
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  border-right: 1px solid var(--line);
  background: var(--chip);
}
.tabs a:first-child { border-left: 1px solid var(--line); }
.tabs a:hover { background: #f6eccf; }
.tabs a.on {
  background: var(--navy);
  color: #fff8ec;
}

.hero-cat {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1.4rem;
  padding: 2.2rem 0 0.4rem;
}
.hero-cat h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  line-height: 1.35;
  color: var(--navy);
}
.lede { font-size: 1.05rem; }
.stamp {
  border: 2px solid var(--amber);
  background: var(--card);
  padding: 1.1rem 1.2rem;
  box-shadow: 6px 6px 0 rgba(44, 61, 82, 0.08);
}
.stamp h3 { margin: 0 0 0.6rem; color: var(--amber); letter-spacing: 0.16em; font-size: 0.95rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0.35rem 0.5rem 0.35rem 0;
  padding: 0.72rem 1.15rem;
  background: var(--navy);
  color: #fff8ec;
  text-decoration: none;
  border: 2px solid var(--navy);
}
.btn svg { width: 18px; height: 18px; }
.btn:hover { background: #1d2b3c; color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--navy);
}
.btn-ghost:hover { background: var(--chip); color: var(--navy); }

.block { padding: 2.1rem 0 0.4rem; }
.block h2 {
  margin: 0 0 0.85rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--amber);
  font-size: 1.38rem;
  color: var(--navy);
}
.callno {
  display: inline-block;
  margin-right: 0.45rem;
  padding: 0.05rem 0.4rem;
  background: var(--chip);
  color: var(--amber);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.slips {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.slip {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 1rem 1.1rem 1.15rem;
  border-left: 6px solid var(--amber);
}
.slip h3 { margin: 0 0 0.45rem; font-size: 1.05rem; }
.slip svg { width: 20px; height: 20px; margin-right: 0.35rem; color: var(--navy); }

.platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}
.plat {
  background: var(--card);
  border: 1px dashed var(--navy);
  padding: 0.95rem;
}
.plat strong { display: block; margin-bottom: 0.35rem; color: var(--navy); }

.quotes { display: grid; gap: 0.9rem; }
.quote {
  background: var(--card);
  padding: 1rem 1.15rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.quote footer { margin-top: 0.4rem; color: var(--muted); font-size: 0.88rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}
.stat {
  background: var(--navy);
  color: #f6eccf;
  padding: 1rem 0.8rem;
  text-align: center;
}
.stat b { display: block; font-size: 1.45rem; color: #f0c36a; }
.stat span { font-size: 0.82rem; }

.sheet {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}
.sheet th, .sheet td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.7rem;
  text-align: left;
}
.sheet th { background: var(--chip); }

.faq { display: grid; gap: 0.85rem; }
.faq article {
  background: var(--card);
  padding: 0.95rem 1.05rem;
  border: 1px solid var(--line);
}
.faq h3 { margin: 0 0 0.4rem; font-size: 1.02rem; }

.site-foot {
  margin-top: 2.8rem;
  padding: 1.4rem 0 2rem;
  border-top: 3px double var(--navy);
  background: #eadfc8;
  color: var(--muted);
  font-size: 0.92rem;
}
.site-foot .safe { color: var(--ok); font-weight: 700; }
.foot-nav { margin: 0.6rem 0; }
.foot-nav a { margin-right: 1rem; }

.nav-toggle {
  display: none;
  border: 1px solid var(--navy);
  background: var(--card);
  color: var(--navy);
  padding: 0.35rem 0.55rem;
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 860px) {
  .hero-cat, .slips, .platforms, .stats { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; }
  .mast-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; padding: 0.8rem 0 0; }
  .brand { letter-spacing: 0.08em; }
  .tabs {
    display: none;
    width: 100%;
    flex-direction: column;
  }
  .tabs.open { display: flex; }
  .tabs a, .tabs a:first-child { border: 1px solid var(--line); }
}

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }