:root {
  --forest: #1B4332;
  --mint: #D8F3DC;
  --night: #081C15;
  --mist: #F0F7F4;
  --ink: #0d2419;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: Georgia, "Source Han Serif SC", "Songti SC", "SimSun", serif;
  background: var(--mist);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.85;
}

a { color: var(--forest); text-decoration: none; }
a:hover { text-decoration: underline; }

.formalbar {
  background: var(--night);
  color: var(--mint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 36px;
  gap: 20px;
}

.crest-mark {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.04em;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  font-size: 13px;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
}

.links a { color: var(--mint); }

.formal-hero {
  max-width: 1100px;
  margin: 36px auto 12px;
  padding: 0 36px;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  align-items: center;
}

.formal-hero h1 {
  font-size: 28px;
  color: var(--forest);
  line-height: 1.4;
  margin-bottom: 10px;
}

.formal-hero p { font-size: 16px; max-width: 38em; }

.ledger {
  max-width: 1100px;
  margin: 0 auto 40px;
  padding: 0 36px;
}

.ledger h2 {
  font-size: 22px;
  color: var(--night);
  margin: 32px 0 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--forest);
}

.ledger p { margin-bottom: 12px; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; }

.meaning-trio {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 18px;
  margin: 14px 0 8px;
}

.meaning-trio article {
  background: #fff;
  padding: 18px 16px;
  border: 1px solid var(--mint);
}

.meaning-trio h3 {
  font-size: 16px;
  color: var(--forest);
  margin-bottom: 8px;
  font-family: Georgia, "Source Han Serif SC", serif;
}

.cache-ledger {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 15px;
}

.cache-ledger th,
.cache-ledger td {
  border: 1px solid #b7e4c7;
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.cache-ledger th { background: var(--forest); color: #fff; }
.cache-ledger td { background: #fff; }

.closeout {
  background: #fff;
  border-left: 5px solid var(--forest);
  padding: 8px 0;
  margin: 12px 0 20px;
}

.closeout ol { padding-left: 28px; }
.closeout li { margin: 10px 0; font-family: "Microsoft YaHei", sans-serif; }

.exposure-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 14px 0 20px;
  background: #fff;
}

.exposure-pair article { padding: 20px 22px; }
.exposure-pair article:first-child { background: var(--mint); }
.exposure-pair h3 {
  font-size: 16px;
  color: var(--night);
  margin-bottom: 8px;
}

.transit-vs-screen {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
  margin: 12px 0 20px;
}

.transit-vs-screen article {
  background: #fff;
  padding: 16px;
}

.transit-vs-screen aside {
  display: flex;
  align-items: center;
  color: var(--forest);
  font-weight: 700;
}

.download-note {
  background: var(--mint);
  padding: 18px 20px;
  margin: 12px 0 20px;
}

.qa-formal { margin: 18px 0; }
.qa-formal h3 {
  font-size: 17px;
  color: var(--forest);
  margin-bottom: 6px;
}
.qa-formal p { font-family: "Microsoft YaHei", sans-serif; }

.seal {
  background: var(--night);
  color: #95d5b2;
  padding: 28px 36px;
  font-size: 14px;
  font-family: "Microsoft YaHei", sans-serif;
}

.seal p { margin-bottom: 8px; }

@media (max-width: 860px) {
  .formal-hero, .meaning-trio, .exposure-pair, .transit-vs-screen { display: block; }
  .formalbar { flex-direction: column; align-items: flex-start; }
}

.meaning-trio svg { display:block; margin-bottom:0.4rem; }