/* 第3套：对比驱动 · 双栏对读 */
:root {
  --ink: #14201c;
  --pine: #1b4332;
  --moss: #2d6a4f;
  --sand: #f4f0e6;
  --card: #fffef9;
  --rule: #cfc6b2;
  --gold: #b08900;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Palatino Linotype", "STSong", "Songti SC", serif;
  background: var(--sand);
  color: var(--ink);
  line-height: 1.8;
  font-size: 17px;
}
a { color: var(--moss); }
.topbar {
  background: var(--pine);
  color: #e9edc9;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 13px;
}
.topbar .wrap {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
}
.wrap { width: min(980px, calc(100% - 32px)); margin: 0 auto; }
.site-head { border-bottom: 3px double var(--pine); background: var(--card); }
.site-head .wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 22px 0 16px;
  gap: 14px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--pine);
  font-size: 28px;
  letter-spacing: 0.12em;
  text-decoration: none;
}
.nav { display: flex; gap: 28px; }
.nav a {
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 6px;
  border-bottom: 2px solid transparent;
}
.nav a.active { border-color: var(--gold); color: var(--pine); }
.hero { padding: 40px 0 20px; text-align: center; }
h1 { font-size: 34px; line-height: 1.4; margin: 10px 0 16px; }
h2 { font-size: 24px; color: var(--pine); margin-bottom: 12px; }
.vs {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
  margin: 28px 0;
}
.vs article {
  background: var(--card);
  border: 1px solid var(--rule);
  padding: 20px;
  text-align: left;
}
.vs-mid {
  align-self: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--pine);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Segoe UI", sans-serif;
  font-weight: 700;
}
.cta-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 18px 0 8px;
}
.btn {
  background: var(--pine);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
}
.btn.light { background: var(--gold); color: #1a1400; }
.compare { padding: 12px 0 32px; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}
th, td {
  border: 1px solid var(--rule);
  padding: 11px 12px;
  text-align: left;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 15px;
}
th { background: var(--pine); color: #fff; }
.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--rule);
  margin: 20px 0 28px;
}
.pair > div { padding: 22px; }
.pair > div:first-child { background: #e9edc9; border-right: 1px solid var(--rule); }
.pair > div:last-child { background: var(--card); }
.quote {
  background: var(--pine);
  color: #e9edc9;
  padding: 36px 0;
}
.quote h2 { color: #fff; }
.facts { padding: 36px 0; }
.facts ul { padding-left: 20px; }
.faq { padding-bottom: 36px; }
.faq-item {
  border-top: 1px solid var(--rule);
  padding: 16px 0;
}
.faq-item h3 { font-size: 18px; margin-bottom: 8px; }
.site-foot {
  background: var(--pine);
  color: #d8e2d4;
  padding: 28px 0;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 13px;
}
.site-foot a { color: #e9edc9; }
.safe { color: #ffe066; margin-bottom: 8px; }
@media (max-width: 800px) {
  .vs, .pair { grid-template-columns: 1fr; }
  .vs-mid { margin: 0 auto; }
}