.seo-shell{max-width:1120px;margin:0 auto;padding:32px 24px;font:16px/1.8 system-ui,sans-serif;color:#23344d}.seo-shell header,.seo-shell footer{padding:20px 0;border-bottom:1px solid #e5ebf3}.seo-shell a{color:#1769e8;text-decoration:none}.seo-shell nav{display:flex;flex-wrap:wrap;gap:16px}.seo-tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;list-style:none;padding:0}.seo-tools li{padding:18px;border:1px solid #e5ebf3;border-radius:12px}.seo-tools p{margin:8px 0;font-size:14px;color:#64748b}.seo-status{padding:14px;background:#eff6ff;border-radius:10px}