:root {
  --forest: #0d3b2e;
  --leaf: #1b7a4e;
  --cream: #f3efe4;
  --ink: #1c241f;
  --rule: #c9c1ae;
  --panel: #fffaf0;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: Georgia, "Source Han Serif SC", "Noto Serif SC", "SimSun", serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.82;
  font-size: 17px;
}

.frame {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  min-height: 100vh;
}
.side-col {
  background: var(--forest);
  color: #e6f4ea;
  padding: 28px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.side-brand {
  font-size: 26px;
  letter-spacing: 0.2em;
  font-weight: 700;
  margin-bottom: 6px;
}
.side-desc { font-size: 12px; color: #b7d8c4; margin-bottom: 28px; font-family: "Microsoft YaHei", sans-serif; }
.side-col nav a {
  display: block;
  color: #d7eadc;
  text-decoration: none;
  padding: 10px 12px;
  margin-bottom: 6px;
  border-left: 3px solid transparent;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 15px;
}
.side-col nav a.current {
  background: #14563a;
  border-left-color: #d4b45a;
  color: #fff;
  font-weight: 700;
}
.side-dl {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid #245544;
}
.side-dl a {
  display: block;
  color: #f0e2b0;
  text-decoration: none;
  font-size: 13px;
  margin: 8px 0;
  font-family: "Microsoft YaHei", sans-serif;
}

.paper { padding: 0 0 48px; }
.lead {
  background: var(--forest);
  color: #f4efe3;
  padding: 42px 40px 36px;
}
.lead h1 { font-size: 32px; line-height: 1.4; margin-bottom: 14px; }
.lead p { max-width: 760px; color: #dce8df; }
.btn-row { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.btn-a, .btn-b {
  display: inline-block;
  padding: 10px 16px;
  text-decoration: none;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
}
.btn-a { background: #d4b45a; color: #1b1404; font-weight: 700; }
.btn-b { border: 1px solid #cfe0d4; color: #e8f5ec; }

.article { max-width: 860px; padding: 32px 40px; }
.article h2 {
  font-size: 23px;
  color: var(--forest);
  margin: 34px 0 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--leaf);
}
.article h2:first-of-type { margin-top: 0; }
.article p { margin-bottom: 12px; }
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 18px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  background: var(--panel);
}
.compare-table th, .compare-table td { border: 1px solid var(--rule); padding: 9px 10px; }
.compare-table th { background: #dce8df; color: var(--forest); text-align: left; }
.pull {
  border-left: 4px solid var(--leaf);
  padding: 8px 14px;
  background: var(--panel);
  margin: 12px 0 16px;
}
.faq dt { font-weight: 700; color: var(--forest); margin-top: 16px; }
.faq dd { margin: 6px 0 0; }

.colophon {
  border-top: 3px solid var(--forest);
  padding: 22px 40px;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: #3d4a43;
  background: #e7e2d4;
}
.colophon .safe { color: var(--forest); font-weight: 700; margin-bottom: 6px; }
.colophon a { color: var(--leaf); }

@media (max-width: 880px) {
  .frame { grid-template-columns: 1fr; }
  .side-col { position: static; height: auto; }
  .lead, .article, .colophon { padding-left: 20px; padding-right: 20px; }
  .lead h1 { font-size: 24px; }
}