.seo-guide{box-sizing:border-box;width:min(1200px,calc(100% - 48px));margin:64px auto;padding:32px;border:1px solid #cddedd;border-radius:12px;background:#f5f9f8;color:#163c40;font:inherit;line-height:1.75}
.seo-guide h2{font-size:clamp(1.4rem,3vw,2rem);line-height:1.3;margin:0 0 16px}
.seo-guide h3{font-size:1.05rem;margin:0 0 10px}
.seo-guide p{margin:0 0 20px}.seo-guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:28px}
.seo-guide nav{display:flex;flex-wrap:wrap;gap:12px 24px;border-top:1px solid #cddedd;padding-top:20px}.seo-guide a{color:#005461;text-decoration:underline;text-underline-offset:4px;font-weight:600}.seo-guide a:focus-visible{outline:2px solid #005461;outline-offset:4px}
@media(max-width:700px){.seo-guide{width:calc(100% - 32px);padding:24px;margin:40px auto}.seo-guide-grid{grid-template-columns:1fr;gap:12px}}