/* 海军蓝色带 + 金线 + 三列栅格 */
:root {
  --navy: #0b1f3a;
  --navy-2: #16325c;
  --gold: #c9a227;
  --ice: #f4f7fb;
  --ink: #132033;
  --mid: #4a5b73;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--ice);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
}
a { color: #1a4f9c; text-decoration: none; }
a:hover { color: var(--gold); }
.mast {
  background: var(--navy);
  color: #fff;
  border-bottom: 3px solid var(--gold);
}
.mast-inner {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}
.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.menu { display: flex; gap: 22px; }
.menu a { color: #d7e2f2; font-size: 14px; }
.menu a.current { color: var(--gold); border-bottom: 2px solid var(--gold); padding-bottom: 4px; }
.hero-center {
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff;
  text-align: center;
  padding: 56px 20px 64px;
}
.hero-center h1 { font-size: 32px; font-weight: 700; margin-bottom: 14px; }
.hero-center p { max-width: 720px; margin: 0 auto 26px; color: #c5d4e8; }
.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
.gold-btn, .line-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
}
.gold-btn { background: var(--gold); color: #1a1404; font-weight: 700; }
.line-btn { border: 1px solid #8aa0bf; color: #fff; }
.inner { width: min(1200px, calc(100% - 32px)); margin: 0 auto; }
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: -36px;
  margin-bottom: 40px;
}
.feat {
  background: #fff;
  padding: 22px 20px 20px;
  border-top: 4px solid var(--gold);
  box-shadow: 0 8px 24px rgba(11, 31, 58, 0.08);
}
.feat h2 { font-size: 18px; margin-bottom: 10px; }
.band {
  padding: 48px 0;
}
.band.navy { background: var(--navy); color: #e8eef7; }
.band.navy h2 { color: #fff; }
.band.white { background: #fff; }
.band h2 { font-size: 26px; margin-bottom: 16px; }
.band p + p { margin-top: 12px; }
.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
table.grid {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
table.grid th, table.grid td {
  border: 1px solid #d5deea;
  padding: 10px 12px;
}
table.grid th { background: #eef3f9; text-align: left; }
.qa { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.qa article { background: #fff; padding: 16px; border-left: 4px solid var(--navy); }
.qa h3 { font-size: 16px; margin-bottom: 8px; }
.base {
  background: var(--navy);
  color: #b9c6d8;
  padding: 32px 0;
  font-size: 13px;
}
.base .safe { color: #f0d789; margin-bottom: 8px; }
.base a { color: #e8c45a; }
svg.i { width: 20px; height: 20px; fill: currentColor; }
@media (max-width: 900px) {
  .feat-grid, .pair, .qa { grid-template-columns: 1fr; }
  .mast-inner { flex-direction: column; gap: 12px; }
}