/* Set 1 — root: two-column corporate blue, centered canvas */
:root {
  --ink: #16324f;
  --muted: #4a6178;
  --line: #d5e2f0;
  --paper: #ffffff;
  --wash: #eef4fb;
  --brand: #1d4f91;
  --brand-2: #2b6cb0;
  --cta: #c45c12;
  --cta-ink: #ffffff;
  --foot: #0f2744;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--wash);
  line-height: 1.75;
  font-size: 16px;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-2); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-head {
  background: var(--paper);
  border-bottom: 3px solid var(--brand);
}
.site-head .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--brand);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.02em;
}
.brand svg { width: 32px; height: 32px; }
nav ul { display: flex; gap: 8px; list-style: none; }
nav a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 4px;
  color: var(--ink);
  font-weight: 600;
}
nav a.is-on {
  background: var(--brand);
  color: #fff;
  text-decoration: none;
}
.wrap { max-width: 1100px; margin: 0 auto; padding: 28px 22px 48px; }
.hero {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 36px 32px;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: 30px;
  line-height: 1.35;
  margin: 8px 0 16px;
  color: var(--brand);
}
.kicker { color: var(--brand-2); font-weight: 700; font-size: 13px; letter-spacing: 0.08em; }
.lead { color: var(--muted); margin-bottom: 20px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--cta);
  color: var(--cta-ink);
  font-weight: 700;
  border-radius: 4px;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.05); text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--brand);
  border: 1px solid var(--brand);
}
.dl-box {
  background: var(--wash);
  border: 1px dashed var(--brand-2);
  padding: 20px;
}
.dl-box h2 { font-size: 18px; margin-bottom: 10px; color: var(--brand); }
.dl-box ol { padding-left: 18px; color: var(--muted); }
.block {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 28px 30px;
  margin-bottom: 22px;
}
.block h2 {
  font-size: 22px;
  color: var(--brand);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line);
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.card {
  border-left: 4px solid var(--brand-2);
  background: var(--wash);
  padding: 16px 16px 16px 18px;
}
.card h3 { font-size: 17px; margin-bottom: 6px; }
.card p { color: var(--muted); font-size: 15px; }
.icon-row { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 8px; }
.icon-row svg { width: 22px; height: 22px; flex-shrink: 0; color: var(--brand); }
table { width: 100%; border-collapse: collapse; margin: 12px 0; }
th, td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
th { background: var(--wash); color: var(--brand); }
.faq dt { font-weight: 700; margin-top: 14px; color: var(--ink); }
.faq dd { color: var(--muted); margin: 6px 0 0; }
.site-foot {
  background: var(--foot);
  color: #d7e4f2;
  padding: 28px 22px 36px;
}
.site-foot .inner { max-width: 1100px; margin: 0 auto; }
.site-foot p { margin-bottom: 8px; font-size: 14px; line-height: 1.7; }
.site-foot .legal { opacity: 0.9; }
@media (max-width: 860px) {
  .hero, .grid-2 { grid-template-columns: 1fr; }
  .site-head .inner { flex-direction: column; align-items: flex-start; }
}