/* 第3套：对比栅格 · 三栏卡片 · 石板蓝 */
:root {
  --navy: #2c3e6b;
  --navy-deep: #1a2744;
  --ice: #eef2f8;
  --amber: #c8881a;
  --ink: #1e2433;
  --muted: #5c6578;
  --card: #ffffff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Georgia", "Source Han Serif SC", "SimSun", serif;
  background: var(--ice);
  color: var(--ink);
  line-height: 1.72;
  font-size: 16.5px;
}
a { color: var(--navy); }
.top {
  background: var(--navy-deep);
  color: #e8edf6;
}
.top-inner {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}
.logo { color: #fff; text-decoration: none; font-size: 20px; font-weight: 700; letter-spacing: 0.08em; }
.nav { display: flex; gap: 8px; list-style: none; }
.nav a {
  color: #d5dced;
  text-decoration: none;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 14px;
}
.nav a.current { background: var(--amber); color: #1a1408; border-color: var(--amber); }
.hero {
  background: var(--navy);
  color: #f4f7fb;
  padding: 48px 0 40px;
}
.hero-inner { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.hero h1 { font-size: 32px; line-height: 1.35; max-width: 820px; margin-bottom: 14px; }
.lead { max-width: 760px; color: #c5d0e4; margin-bottom: 20px; }
.btn {
  display: inline-block;
  background: var(--amber);
  color: #1a1408;
  text-decoration: none;
  padding: 12px 20px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-weight: 700;
}
.btn-lite {
  display: inline-block;
  margin-left: 10px;
  color: #fff;
  border-bottom: 1px solid #fff;
  text-decoration: none;
  padding: 10px 4px;
}
.dl-three {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 22px;
}
.dl-three a {
  background: #24355c;
  color: #fff;
  text-decoration: none;
  padding: 12px 10px;
  text-align: center;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 14px;
}
.block { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 36px 0; }
.block h2 { font-size: 24px; margin-bottom: 14px; color: var(--navy-deep); }
.block p { margin-bottom: 12px; }
.tri {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card {
  background: var(--card);
  border-top: 4px solid var(--navy);
  padding: 16px 16px 12px;
  box-shadow: 0 8px 24px rgba(28, 40, 70, 0.06);
}
.card h3 { font-size: 17px; margin-bottom: 8px; font-family: "Segoe UI", "PingFang SC", sans-serif; }
table.wide {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 14.5px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
}
.wide th, .wide td { border: 1px solid #d4dbe8; padding: 10px; text-align: left; vertical-align: top; }
.wide th { background: var(--navy); color: #fff; }
.wide td.good { background: #f7f1e4; }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; }
.faq-grid h3 { font-size: 16px; margin-bottom: 6px; }
.site-footer {
  background: var(--navy-deep);
  color: #c9d3e6;
  padding: 24px 0 32px;
  font-size: 13px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
}
.site-footer .block { padding: 0; }
.site-footer a { color: #f0d59a; margin-right: 14px; }
@media (max-width: 900px) {
  .tri, .dl-three, .faq-grid { grid-template-columns: 1fr; }
  .top-inner { flex-direction: column; gap: 10px; align-items: flex-start; }
}