.seo-nav { display: flex; align-items: center; gap: 18px; color: var(--muted-bright); font-size: 12px; }
.seo-nav a { text-decoration: none; }
.seo-nav a:hover { color: var(--text); }
.seo-page { max-width: 980px; min-height: calc(100vh - 145px); padding-block: clamp(42px, 7vw, 86px); }
.seo-article { max-width: 760px; }
.seo-article h1, .seo-error h1 { max-width: 720px; margin: 13px 0 18px; font-size: clamp(40px, 7vw, 72px); line-height: .98; letter-spacing: -.07em; }
.seo-intro { max-width: 690px; margin-bottom: 48px; color: var(--muted-bright); font-size: clamp(16px, 2vw, 20px); line-height: 1.6; }
.seo-section { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--line); }
.seo-section h2 { margin-bottom: 12px; color: var(--text); font-size: 23px; }
.seo-section p, .seo-section li { color: var(--muted-bright); font-size: 14px; line-height: 1.75; }
.seo-section p { margin-bottom: 12px; }
.seo-section ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 24px; margin: 15px 0 0; padding-left: 19px; }
.seo-faq { display: grid; gap: 0; }
.seo-faq .seo-section { margin-top: 0; }
.seo-faq-item h2 { font-size: 19px; }
.seo-error { max-width: 650px; padding: clamp(26px, 5vw, 56px); border: 1px solid var(--line); border-radius: var(--radius-xl); background: var(--panel); box-shadow: var(--shadow); }
.seo-error h1 { margin-top: 12px; font-size: clamp(72px, 14vw, 150px); }
.seo-error .seo-intro { margin-bottom: 28px; }
.footer a { color: var(--muted-bright); text-decoration: none; }
.footer a:hover { color: var(--text); }
@media (max-width: 620px) {
  .seo-nav { gap: 9px; font-size: 11px; }
  .seo-nav a:nth-child(3) { display: none; }
  .seo-page { min-height: calc(100vh - 130px); padding-top: 42px; }
  .seo-section ul { grid-template-columns: 1fr; }
  .seo-error { padding: 25px; border-radius: 18px; }
}