:root {
  color-scheme: light;
  --ink: #102a52;
  --muted: #5d6f8c;
  --line: #d7e0ee;
  --soft: #f4f7fb;
  --accent: #0b2d6b;
  --accent-soft: #eaf1ff;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: #f8fafc;
  color: var(--ink);
  font: 16px/1.65 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: #0a56b7; }
.seo-shell { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
.seo-header { background: white; border-bottom: 1px solid var(--line); }
.seo-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 72px; }
.seo-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; text-decoration: none; }
.seo-brand img { width: 34px; height: 34px; }
.seo-nav { display: flex; flex-wrap: wrap; gap: 14px; justify-content: flex-end; font-size: 14px; }
.seo-nav a { color: var(--ink); text-decoration: none; }
.seo-nav a:hover { text-decoration: underline; }
.seo-breadcrumb { max-width: 1040px; margin: 22px auto 0; padding: 0 24px; color: var(--muted); font-size: 13px; }
.seo-breadcrumb a { color: var(--muted); }
.seo-hero { padding: 64px 0 36px; }
.seo-kicker { color: #b14e00; font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
h1, h2, h3 { color: var(--ink); line-height: 1.2; }
h1 { max-width: 780px; margin: 12px 0 16px; font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: -.035em; }
h2 { margin-top: 42px; font-size: 1.65rem; }
h3 { margin-top: 26px; font-size: 1.15rem; }
.seo-lede { max-width: 780px; color: var(--muted); font-size: 1.15rem; }
.seo-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin: 28px 0; }
.seo-card { padding: 22px; background: white; border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 8px 22px rgba(16,42,82,.05); }
.seo-card h2, .seo-card h3 { margin-top: 0; }
.seo-card p:last-child { margin-bottom: 0; }
.seo-note { padding: 18px 20px; background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 8px; }
.seo-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: white; }
table { width: 100%; border-collapse: collapse; background: white; }
th, td { padding: 12px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--soft); }
.seo-footer { margin-top: 64px; padding: 30px 0; background: var(--accent); color: white; }
.seo-footer a { color: white; }
.seo-footer-nav { display: flex; flex-wrap: wrap; gap: 16px; }
@media (max-width: 700px) {
  .seo-header-inner { align-items: flex-start; flex-direction: column; padding: 16px 0; }
  .seo-nav { justify-content: flex-start; }
  .seo-hero { padding-top: 42px; }
  .seo-shell, .seo-breadcrumb { padding-left: 18px; padding-right: 18px; }
  .seo-nav { gap: 10px 14px; font-size: 13px; }
  .seo-card { padding: 18px; }
  .seo-table-wrap { margin: 0 -2px; -webkit-overflow-scrolling: touch; }
  .seo-table-wrap table { min-width: 520px; font-size: 14px; }
  .seo-table-wrap th:first-child, .seo-table-wrap td:first-child { position: sticky; left: 0; background: inherit; box-shadow: 2px 0 0 rgba(215,224,238,.75); }
  .seo-footer { margin-top: 44px; }
}