:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-light: #eff6ff;
  --ink: #0f172a;
  --ink-2: #334155;
  --ink-3: #64748b;
  --bg: #f8fafc;
  --border: #e2e8f0;
  --gold: #f59e0b;
  --green: #16a34a;
  --red: #dc2626;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: var(--ink); line-height: 1.65; background: #fff; }
a { color: var(--blue); }

.seo-nav { background: #fff; border-bottom: 1px solid var(--border); padding: 14px 0; position: sticky; top: 0; z-index: 100; }
.seo-nav-inner { max-width: 1100px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.seo-logo { font-weight: 900; font-size: 18px; color: var(--ink); text-decoration: none; }
.seo-logo span { color: var(--blue); }
.seo-nav-links { display: flex; gap: 22px; flex-wrap: wrap; align-items: center; }
.seo-nav-links a { color: var(--ink-2); text-decoration: none; font-size: 14px; font-weight: 600; }
.seo-nav-links a:hover { color: var(--blue); }
.seo-cta { background: var(--blue); color: #fff !important; padding: 8px 16px; border-radius: 6px; font-weight: 700; }
.seo-cta:hover { background: var(--blue-dark); }

.seo-hero { background: linear-gradient(135deg, var(--blue-light) 0%, #fff 100%); padding: 60px 20px 40px; text-align: center; }
.seo-hero h1 { font-size: 38px; font-weight: 900; max-width: 800px; margin: 0 auto 16px; line-height: 1.2; color: var(--ink); }
.seo-hero p { font-size: 18px; color: var(--ink-2); max-width: 700px; margin: 0 auto 24px; }

.seo-content { max-width: 800px; margin: 0 auto; padding: 40px 20px 60px; }
.seo-breadcrumb { font-size: 13px; color: var(--ink-3); margin-bottom: 20px; }
.seo-breadcrumb a { color: var(--blue); text-decoration: none; }
.seo-content h2 { font-size: 28px; font-weight: 900; margin: 40px 0 16px; line-height: 1.3; color: var(--ink); }
.seo-content h3 { font-size: 20px; font-weight: 800; margin: 28px 0 12px; color: var(--ink); }
.seo-content p { margin-bottom: 16px; font-size: 16px; color: var(--ink-2); }
.seo-content ul, .seo-content ol { margin: 16px 0 16px 24px; color: var(--ink-2); }
.seo-content li { margin-bottom: 8px; }
.seo-content strong { color: var(--ink); }

.seo-callout { background: var(--blue-light); border-left: 4px solid var(--blue); padding: 18px 22px; border-radius: 8px; margin: 24px 0; }
.seo-callout-warning { background: #fff7ed; border-left-color: var(--gold); }

.seo-tool-cta { background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%); color: #fff; padding: 32px 28px; border-radius: 14px; text-align: center; margin: 36px 0; }
.seo-tool-cta h3 { color: #fff; font-size: 22px; margin-bottom: 8px; }
.seo-tool-cta p { color: rgba(255,255,255,0.9); margin-bottom: 18px; }
.seo-tool-cta a { background: #fff; color: var(--blue); padding: 12px 28px; border-radius: 8px; text-decoration: none; font-weight: 800; display: inline-block; }
.seo-tool-cta a:hover { background: #f1f5f9; }

.seo-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14px; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seo-table th { background: var(--ink); color: #fff; padding: 12px; text-align: left; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.seo-table td { padding: 12px; border-bottom: 1px solid var(--border); color: var(--ink-2); }
.seo-table tr:last-child td { border-bottom: none; }
.seo-table tr:nth-child(even) td { background: var(--bg); }

.seo-related { background: var(--bg); padding: 32px 20px; border-top: 1px solid var(--border); }
.seo-related-inner { max-width: 1100px; margin: 0 auto; }
.seo-related h3 { font-size: 18px; margin-bottom: 16px; }
.seo-related-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.seo-related-card { background: #fff; padding: 16px; border-radius: 8px; border: 1px solid var(--border); text-decoration: none; color: var(--ink); display: block; }
.seo-related-card:hover { border-color: var(--blue); transform: translateY(-2px); transition: all 0.15s; }
.seo-related-card .label { font-size: 11px; color: var(--blue); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; }
.seo-related-card .title { font-weight: 700; margin-top: 4px; color: var(--ink); }

.seo-footer { background: var(--ink); color: #fff; padding: 36px 20px; }
.seo-footer-inner { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; }
.seo-footer h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.6); margin-bottom: 12px; }
.seo-footer ul { list-style: none; margin: 0; }
.seo-footer li { margin-bottom: 6px; }
.seo-footer a { color: rgba(255,255,255,0.85); text-decoration: none; font-size: 14px; }
.seo-footer a:hover { color: #fff; }
.seo-footer-bottom { max-width: 1100px; margin: 24px auto 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 13px; color: rgba(255,255,255,0.6); text-align: center; }

.faq-item { border-bottom: 1px solid var(--border); padding: 16px 0; }
.faq-item h3 { font-size: 17px; margin-bottom: 8px; }
.faq-item:last-child { border-bottom: none; }

@media (max-width: 700px) {
  .seo-hero h1 { font-size: 28px; }
  .seo-content h2 { font-size: 22px; }
  .seo-nav-links { gap: 12px; }
}