:root {
  --ink: #0d2c55;
  --ink-soft: #335c8e;
  --paper: #eef3ff;
  --line: #d0def5;
  --accent: #2a68ff;
  --accent-strong: #1747cb;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
body {
  line-height: 1.7;
}
a { color: var(--accent-strong); }
.site-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 56px;
}
.site-header {
  background: linear-gradient(130deg, #102c53, #1a4f94);
  color: #fff;
  border-radius: 18px;
  padding: 22px;
  box-shadow: 0 10px 24px rgb(12 43 84 / 18%);
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.brand img { width: 180px; height: 60px; object-fit: cover; }
.brand h1 { margin: 0; font-size: 30px; line-height: 1.2; }
.main-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 20px;
  margin-top: 18px;
}
.nav { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 14px; }
.nav ul { list-style: none; padding-left: 0; margin: 0; display: grid; gap: 8px; }
.nav a { text-decoration: none; }
.article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
}
.section-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 16px 0;
  background: #f9fbff;
}
.section-card h3 { margin-top: 0; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #dce7ff;
  color: #173d7d;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
}
.page-footer {
  margin-top: 22px;
  font-size: 13px;
  color: var(--ink-soft);
}
.ad-slot {
  border: 2px dashed #9cb6e7;
  padding: 12px;
  background: #edf2ff;
  border-radius: 12px;
  margin: 18px 0;
}
.faq-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.faq-list details { background: #f3f7ff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.faq-list summary { cursor: pointer; font-weight: 600; }
.tag { display: inline-block; padding: 6px 10px; border-radius: 999px; background: #ecf2ff; margin-right: 6px; margin-bottom: 8px; font-size: 13px; }
.hero-img { width: 100%; border-radius: 12px; border: 1px solid var(--line); margin-top: 10px; }
@media (max-width: 920px) {
  .main-grid { grid-template-columns: 1fr; }
  .brand h1 { font-size: 26px; }
}