/* Set 2 www — left copy, right sticky download rail */
:root {
  --bg: #f4f1ea;
  --paper: #fffdf8;
  --ink: #1b2430;
  --muted: #5a6158;
  --line: #ddd4c4;
  --brand: #0d7a4f;
  --brand-deep: #085c3b;
  --rail: #173528;
  --soft: #e5f3eb;
  --sans: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.8;
}
img, svg { max-width: 100%; display: inline-block; vertical-align: middle; }
a { color: var(--brand-deep); }
.site-header {
  background: var(--paper);
  border-bottom: 2px solid var(--brand);
}
.site-header__inner {
  width: min(1200px, calc(100% - 36px));
  margin: 0 auto;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--rail);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}
.brand svg { width: 30px; height: 30px; }
.site-nav { display: flex; gap: 6px; flex-wrap: wrap; }
.site-nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 7px 11px;
  border-bottom: 2px solid transparent;
}
.site-nav a.is-active {
  color: var(--brand-deep);
  border-bottom-color: var(--brand);
  font-weight: 700;
}
.page {
  width: min(1200px, calc(100% - 36px));
  margin: 24px auto 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}
.main-col section { margin: 0 0 28px; }
.main-col h1 { margin: 0 0 14px; font-size: 32px; line-height: 1.35; }
.main-col h2 { margin: 0 0 12px; font-size: 22px; }
.main-col p { margin: 0 0 12px; }
.kicker { margin: 0 0 8px; color: var(--brand-deep); font-size: 13px; letter-spacing: 0.06em; }
.lede { font-size: 17.5px; }
.stack > * { margin-bottom: 14px; }
.two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.card, .review {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 16px;
}
.card h3, .review h3 { margin: 0 0 8px; font-size: 17px; }
table { width: 100%; border-collapse: collapse; background: var(--paper); }
th, td { border: 1px solid var(--line); padding: 9px 11px; text-align: left; vertical-align: top; }
th { background: var(--soft); }
.faq-item { background: var(--paper); border: 1px solid var(--line); padding: 14px 16px; margin: 0 0 10px; }
.faq-item h3 { margin: 0 0 8px; font-size: 16.5px; }
.dl-rail {
  position: sticky;
  top: 16px;
  background: var(--rail);
  color: #f3fff6;
  padding: 20px 18px;
  border-radius: 6px;
}
.dl-rail h2, .dl-rail p { color: #f3fff6; }
.dl-rail h2 { margin: 0 0 10px; font-size: 18px; }
.dl-rail p { margin: 0 0 12px; color: #cfe6d8; font-size: 14.5px; }
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #f4c542;
  color: #173528;
  text-decoration: none;
  padding: 11px 14px;
  border-radius: 6px;
  font-weight: 700;
  margin: 0 0 8px;
}
.btn:hover { filter: brightness(1.05); }
.btn-ghost {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: #f3fff6;
  border: 1px solid #8fb89a;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 6px;
  font-weight: 700;
  margin: 0 0 8px;
}
.btn svg { width: 16px; height: 16px; }
.site-footer {
  width: min(1200px, calc(100% - 36px));
  margin: 28px auto 32px;
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.site-footer p { margin: 0 0 8px; }
@media (max-width: 960px) {
  .page { grid-template-columns: 1fr; }
  .dl-rail { position: static; }
  .two { grid-template-columns: 1fr; }
  .site-header__inner { flex-direction: column; padding: 10px 0 12px; }
}