.seo-material-section{background:#f6f6f2}.seo-material-section h2{font-size:clamp(28px,3vw,42px);max-width:850px}.seo-material-intro{max-width:800px;color:#555;font-size:18px;line-height:1.8}.seo-detail-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:38px;margin-top:30px}.seo-detail-grid h3{font-size:22px}.seo-detail-grid p{line-height:1.85;color:#555}.seo-detail-links{display:flex;gap:25px;flex-wrap:wrap;margin-top:26px}