.seo-guide {
    max-width: 1080px;
    margin: 32px auto;
    padding: 28px;
    background: #f7f8fa;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    color: #1a1a1a;
    line-height: 1.7;
}
.seo-guide h2 { color: #021f3c; font-size: 1.4rem; margin: 20px 0 10px; }
.seo-guide h3 { color: #021f3c; font-size: 1.1rem; margin: 16px 0 8px; }
.seo-guide p { margin: 8px 0 16px; }
.seo-guide a, .seo-breadcrumb a { color: #003087; text-decoration: underline; text-underline-offset: 3px; }
.seo-guide-links { display: flex; flex-wrap: wrap; gap: 12px 24px; margin: 18px 0; }
.seo-guide a:focus-visible, .seo-breadcrumb a:focus-visible { outline: 3px solid #0050c8; outline-offset: 4px; }
.seo-guide ul { padding-left: 22px; }
.seo-source-note, .seo-breadcrumb { font-size: .9rem; color: #4a5568; }
.seo-legal-breadcrumb { margin-bottom: 20px; }
@media (max-width: 600px) {
    .seo-guide { margin: 24px 16px; padding: 20px; }
    .seo-guide-links { flex-direction: column; gap: 8px; }
}