.seo-catalog-body { background: #fff; }
.seo-catalog-shell { width: min(1040px, calc(100% - 48px)); margin-inline: auto; }
.seo-catalog-hero {
  padding: 54px 0 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #f5f7fb 0%, #fff 100%);
}
.seo-catalog-hero h1 { max-width: 820px; margin: 12px 0 18px; font-size: clamp(40px, 6vw, 68px); line-height: 1.03; }
.seo-catalog-hero p { max-width: 760px; margin: 0; color: var(--ink-soft); font-size: 20px; }
.seo-catalog-content { padding: 54px 0 88px; }
.seo-catalog-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.seo-catalog-card {
  display: block;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
}
.seo-catalog-card:hover { border-color: #9bb3ff; transform: translateY(-2px); }
.seo-catalog-card small { display: block; margin-bottom: 8px; color: var(--blue); font-weight: 800; }
.seo-catalog-card h2 { margin: 0 0 10px; font-size: 26px; }
.seo-catalog-card p { margin: 0; color: var(--ink-soft); }
.seo-catalog-note { margin-top: 28px; color: var(--muted); font-size: 14px; }
@media (max-width: 720px) {
  .seo-catalog-shell { width: min(100% - 32px, 1040px); }
  .seo-catalog-hero { padding: 38px 0 42px; }
  .seo-catalog-grid { grid-template-columns: 1fr; }
}