:root {
  --forest: #1E4D3A;
  --forest-deep: #143528;
  --gold: #D4A017;
  --gold-soft: #f3e2a8;
  --ivory: #FFFAf0;
  --paper: #fffdf7;
  --line: #d8c9a0;
  --ink: #1a2e24;
  --muted: #4d6358;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--ivory);
  color: var(--ink);
  line-height: 1.75;
}

h1, h2, .brand-name, .num, .check-board ol li::before {
  font-family: Garamond, "Palatino Linotype", Palatino, "Times New Roman", serif;
}

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

.site-head {
  background: var(--forest);
  color: var(--ivory);
  border-bottom: 4px solid var(--gold);
}

.site-head .inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 16px 22px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-name {
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 0.92rem;
}

.nav a { color: #f6ecd0; }
.nav a:hover { color: var(--gold); }

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 22px 64px;
}

.hero {
  padding: 42px 0 28px;
  border-bottom: 1px dashed var(--line);
}

.hero h1 {
  font-size: 2.05rem;
  line-height: 1.35;
  color: var(--forest-deep);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero p { color: var(--muted); font-size: 1.05rem; }

.block {
  padding: 40px 0 8px;
  border-bottom: 1px solid var(--line);
}

.block h2 {
  font-size: 1.65rem;
  color: var(--forest);
  margin-bottom: 14px;
  padding-left: 14px;
  border-left: 5px solid var(--gold);
}

.lead { margin-bottom: 18px; color: var(--muted); }

.risk-stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 8px 0 18px;
}

.risk-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 6px solid var(--gold);
  padding: 16px 18px 14px;
}

.risk-card h3 {
  font-size: 1.05rem;
  color: var(--forest-deep);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.risk-card svg { flex: 0 0 auto; }

.check-board {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 8px 18px 6px 18px;
  margin: 10px 0 16px;
}

.check-board ol { list-style: none; counter-reset: leave; }

.check-board ol li {
  counter-increment: leave;
  position: relative;
  padding: 14px 0 14px 48px;
  border-bottom: 1px dotted var(--line);
}

.check-board ol li:last-child { border-bottom: 0; }

.check-board ol li::before {
  content: counter(leave);
  position: absolute;
  left: 0;
  top: 14px;
  width: 32px;
  height: 32px;
  border: 2px solid var(--gold);
  color: var(--forest);
  text-align: center;
  line-height: 28px;
  font-size: 1.15rem;
}

.step-rail {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 12px 0 18px;
}

.step-rail article {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  padding: 12px 0;
}

.num {
  width: 48px;
  height: 48px;
  background: var(--forest);
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.pair-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--paper);
  margin: 12px 0 16px;
  font-size: 0.96rem;
}

.pair-table th,
.pair-table td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.pair-table th {
  background: var(--forest);
  color: var(--ivory);
  font-weight: 600;
}

.pair-table tr:nth-child(even) td { background: #f7f1e0; }

.trace-list {
  list-style: none;
  margin: 10px 0 16px;
}

.trace-list li {
  padding: 10px 0 10px 28px;
  border-bottom: 1px dashed var(--line);
  position: relative;
}

.trace-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 12px;
  height: 12px;
  background: var(--gold);
}

.keep-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 12px 0 16px;
}

.keep-item {
  background: var(--paper);
  padding: 14px 16px;
  border-top: 3px solid var(--forest);
}

.keep-item h3 {
  font-size: 1rem;
  margin-bottom: 6px;
  color: var(--forest-deep);
}

.faq-list { margin: 12px 0 8px; }

.faq-list details {
  background: var(--paper);
  border: 1px solid var(--line);
  margin-bottom: 8px;
  padding: 0;
}

.faq-list summary {
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 600;
  color: var(--forest-deep);
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }

.faq-list summary::before {
  content: "+";
  display: inline-block;
  width: 1.2em;
  color: var(--gold);
}

.faq-list details[open] summary::before { content: "–"; }

.faq-list details p {
  padding: 0 14px 14px;
  color: var(--muted);
}

.site-foot {
  background: var(--forest-deep);
  color: #e8e0cc;
  padding: 28px 22px 36px;
}

.site-foot .inner { max-width: 880px; margin: 0 auto; }

.site-foot p { margin-bottom: 10px; font-size: 0.92rem; }

.stamp { color: var(--gold-soft); margin-top: 8px; }

@media (min-width: 760px) {
  .keep-grid { grid-template-columns: 1fr 1fr; }
}