:root {
  --bg: #f7f4ee;
  --card: #fffdf8;
  --ink: #1c1a17;
  --muted: #6b6257;
  --line: #dfd6c8;
  --brand: #8a2d1c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Noto Serif SC", "Source Han Serif SC", "PingFang SC", serif;
  color: var(--ink);
  background: radial-gradient(1400px 700px at 85% -15%, #f0d8be 0, transparent 62%), var(--bg);
}
.wrap { max-width: 980px; margin: 0 auto; padding: 28px 18px 60px; }
.header { margin: 6px 0 18px; }
.title { font-size: 30px; margin: 0; }
.sub { color: var(--muted); margin-top: 8px; }
.search {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px;
  background: #fff; font-size: 15px; margin: 14px 0 22px;
}
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px;
  text-decoration: none; color: inherit; display: block;
}
.card:hover { border-color: #c8b69d; transform: translateY(-1px); transition: .18s ease; }
.card h3 { margin: 0 0 8px; font-size: 17px; line-height: 1.45; }
.card p { margin: 0; color: var(--muted); line-height: 1.7; font-size: 14px; }
.meta { margin-top: 9px; font-size: 12px; color: #857b70; }
.footer { margin-top: 24px; color: var(--muted); font-size: 13px; }
.article { max-width: 840px; margin: 0 auto; padding: 30px 16px 80px; }
.topbar { font-size: 14px; margin-bottom: 14px; }
.topbar a { color: var(--brand); text-decoration: none; }
.paper {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 24px 20px;
}
.paper h1 { font-size: 30px; margin: 0 0 6px; line-height: 1.35; }
.paper h2 { font-size: 22px; margin: 22px 0 10px; }
.paper p { margin: 10px 0; line-height: 1.95; text-indent: 2em; font-size: 18px; }
.r { color: var(--muted); font-size: 13px; margin-top: 10px; }
.navline { margin-top: 16px; display: flex; gap: 12px; flex-wrap: wrap; }
.navline a { color: var(--brand); text-decoration: none; font-size: 14px; }
.toc-intro {
  margin-top: 14px;
  text-indent: 0 !important;
  font-size: 16px !important;
  color: var(--muted);
}
.toc-list {
  margin: 14px 0 0;
  padding-left: 22px;
  display: grid;
  gap: 12px;
}
.toc-list li {
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}
.toc-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.toc-list a {
  color: var(--brand);
  text-decoration: none;
  line-height: 1.7;
}
.toc-list a:hover {
  text-decoration: underline;
}
.toc-meta {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}
.wm {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  display: grid; place-items: center;
}
.wm span {
  transform: rotate(-20deg); color: rgba(80,62,43,.11); font-size: 34px; letter-spacing: 2px;
  user-select: none;
}
@media (max-width: 680px) {
  .title { font-size: 25px; }
  .paper h1 { font-size: 24px; }
  .paper p { font-size: 17px; }
  .toc-intro { font-size: 15px !important; }
}