:root {
  --indigo: #1e3a8a;
  --cyan: #06b6d4;
  --bg: #eef2ff;
  --card: #ffffff;
  --text: #0f172a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
}
a { color: #1d4ed8; }

.appbar {
  background: var(--indigo);
  color: #fff;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 12;
  box-shadow: 0 4px 16px rgba(30, 58, 138, 0.25);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}
.nav { display: flex; gap: 8px; }
.nav a {
  color: #c7d2fe;
  text-decoration: none;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 14px;
}
.nav a.is-current {
  background: var(--cyan);
  color: #083344;
  font-weight: 700;
}

.hero {
  max-width: 1080px;
  margin: 24px auto 8px;
  padding: 28px;
  background: linear-gradient(135deg, #1e3a8a, #0e7490);
  color: #fff;
  border-radius: 20px;
}
.hero h1 { font-size: 30px; line-height: 1.4; margin-bottom: 12px; }
.hero p { opacity: 0.92; margin-bottom: 20px; }
.btn-dl {
  display: inline-block;
  background: var(--cyan);
  color: #083344;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 800;
}
.btn-dl:hover { filter: brightness(1.08); color: #083344; }

.grid {
  max-width: 1080px;
  margin: 0 auto 28px;
  padding: 0 8px 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.tile {
  background: var(--card);
  border-radius: 16px;
  padding: 22px 22px 20px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}
.tile.wide { grid-column: 1 / -1; }
.tile h2 { font-size: 20px; color: var(--indigo); margin-bottom: 10px; }
.tile p { margin-bottom: 10px; }
.pick {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}
.pick a, .pick span {
  display: block;
  background: #e0f2fe;
  border-radius: 12px;
  padding: 12px;
  text-decoration: none;
  color: #0c4a6e;
  font-size: 14px;
}
.faq-item { margin-bottom: 14px; }
.faq-item h3 { font-size: 16px; margin-bottom: 6px; color: #1e3a8a; }

.site-footer {
  background: #0b1224;
  color: #cbd5e1;
  padding: 28px 20px 40px;
  font-size: 13px;
}
.site-footer .inner { max-width: 1080px; margin: 0 auto; }
.foot-nav a { color: var(--cyan); margin-right: 14px; text-decoration: none; }
.site-footer p { margin: 8px 0; }

@media (max-width: 800px) {
  .grid, .pick { grid-template-columns: 1fr; }
  .hero { margin: 12px; padding: 20px; border-radius: 14px; }
  .appbar { flex-wrap: wrap; gap: 8px; }
}