:root {
  --bg: #0e1218;
  --card: #171d26;
  --line: #2a3340;
  --text: #e8edf4;
  --muted: #8b95a5;
  --good: #3d9b7a;
  --bad: #c4567a;
  --accent: #4c8dff;
  --ink: #d5deea;
  --soft: #c5ced9;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
header {
  padding: 32px 28px 8px;
  max-width: 880px;
  margin: 0 auto;
}
.nav { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.nav a { color: #9db0c9; text-decoration: none; }
.nav a:hover { color: var(--text); }
.ver {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 650;
}
header h1 { font-size: 26px; font-weight: 650; margin: 0 0 6px; }
header .sub { margin: 0; color: var(--muted); font-size: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.chip {
  font-size: 12px;
  color: #d5deea;
  background: #1a222d;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 4px 8px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 8px 28px 80px; }
.sec { margin: 30px 0 0; }
.sec h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 650;
  margin: 0 0 12px;
}
.sec h2 .n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #222a35;
  border: 1px solid var(--line);
  font-size: 11px;
  color: var(--muted);
  font-weight: 650;
  flex: 0 0 22px;
}
p, li { font-size: 14.5px; color: var(--ink); }
.say {
  font-size: 17px;
  line-height: 1.55;
  color: var(--text);
  margin: 0;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
}
.analogy {
  background: #1c2838;
  border: 1px solid #2d4460;
  border-radius: 12px;
  padding: 14px 16px;
}
.analogy p { margin: 0; color: #c5d4e8; font-size: 14.5px; }
.move {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.move .row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
}
.move .row:last-child { border-bottom: 0; }
.move .k { color: var(--muted); font-size: 12px; padding-top: 2px; }
.move .v { color: var(--soft); }
.move code, .param .name, pre, code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.param {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 0 0 10px;
  border-left: 3px solid var(--accent);
}
.param .name {
  font-size: 14px;
  font-weight: 650;
  color: #fff;
}
.param .val { color: var(--muted); font-weight: 400; font-size: 13px; }
.param .mini {
  margin: 8px 0 0;
  font-size: 13.5px;
  color: #c5d4e8;
}
.trio {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}
.box { background: #121821; border-radius: 10px; padding: 10px 12px; }
.box .k { font-size: 11px; color: var(--muted); }
.box .v { font-size: 13px; margin-top: 3px; color: var(--soft); }
.readout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}
.fake {
  background: #241820;
  border: 1px solid #4a2d38;
  border-radius: 12px;
  padding: 14px 16px;
}
.fake .hollow { color: #e2b4c2; font-size: 14.5px; }
.fake .real { margin-top: 8px; color: var(--ink); font-size: 14.5px; }
.hint { margin: 0 0 10px; font-size: 13px; color: var(--muted); }
ol.ask {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: q;
}
ol.ask li {
  counter-increment: q;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px 12px 44px;
  margin: 0 0 8px;
  position: relative;
}
ol.ask li::before {
  content: counter(q);
  position: absolute;
  left: 14px;
  top: 12px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #222a35;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
  font-weight: 650;
  display: flex;
  align-items: center;
  justify-content: center;
}
pre {
  background: #121821;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.5;
  color: #d7e0ec;
  margin: 0;
}
code { font-size: 0.92em; }
.pass {
  background: #16241f;
  border: 1px solid #2d4a40;
  border-radius: 12px;
  padding: 14px 16px;
}
.pass p { margin: 0 0 10px; color: #cfe6dc; }
.pass p:last-child { margin-bottom: 0; }
.pass pre { margin-top: 10px; }
.pager {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 32px;
}
.pager a {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--soft);
  text-decoration: none;
  font-size: 13.5px;
}
.pager a:hover { border-color: #5b6b80; color: var(--text); }
.pager a b { color: var(--text); display: block; margin-bottom: 2px; }
.pager a.back { flex: 0 0 auto; }
@media (max-width: 720px) {
  .trio, .readout { grid-template-columns: 1fr; }
  .move .row { grid-template-columns: 1fr; gap: 2px; }
  header, .wrap { padding-left: 16px; padding-right: 16px; }
  .pager { flex-direction: column; }
}

.item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 0 0 12px;
  border-left: 3px solid var(--accent);
}
.item .name {
  font-size: 14px;
  font-weight: 650;
  color: #fff;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.item pre { margin: 10px 0 0; }
.item .plain {
  margin: 8px 0 0;
  font-size: 14.5px;
  color: #c5d4e8;
}
.item .trio { margin-top: 10px; }