.seo-article { padding: 52px 0 72px; }
.seo-article__header,
.seo-article__layout { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.seo-article__breadcrumb { color: var(--text-muted); font-size: .84rem; margin-bottom: 18px; }
.seo-article__breadcrumb a { color: var(--primary); text-decoration: none; }
.seo-article__tag { display: inline-flex; padding: 5px 10px; border-radius: 999px; background: color-mix(in srgb, var(--primary) 12%, transparent); color: var(--primary); font-size: .72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.seo-article h1 { max-width: 920px; margin: 18px 0; font: 700 clamp(2rem, 5vw, 3.5rem)/1.12 var(--font-heading); letter-spacing: -.03em; }
.seo-article__lead { max-width: 820px; color: var(--text-secondary); font-size: 1.12rem; line-height: 1.7; }
.seo-article__meta { display: flex; flex-wrap: wrap; gap: 10px 24px; padding: 18px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); color: var(--text-muted); font-size: .86rem; }
.seo-article__layout { display: grid; grid-template-columns: 220px minmax(0, 760px); gap: 48px; padding-top: 38px; }
.seo-article__toc { position: sticky; top: 90px; align-self: start; }
.seo-article__toc strong { display: block; margin-bottom: 12px; }
.seo-article__toc a { display: block; padding: 6px 0; color: var(--text-muted); text-decoration: none; font-size: .86rem; line-height: 1.4; }
.seo-article__toc a:hover { color: var(--primary); }
.seo-article__body { min-width: 0; color: var(--text-secondary); font-size: 1rem; line-height: 1.8; }
.seo-article__body h2 { margin: 42px 0 14px; color: var(--text); font: 650 clamp(1.35rem, 3vw, 1.8rem)/1.3 var(--font-heading); }
.seo-article__body h2:first-child { margin-top: 0; }
.seo-article__body h3 { margin: 28px 0 10px; color: var(--text); }
.seo-article__body p,
.seo-article__body ul,
.seo-article__body ol { margin: 0 0 18px; }
.seo-article__body li { margin-bottom: 9px; }
.seo-article__body a { color: var(--primary); }
.seo-article__answer { margin: 0 0 26px; padding: 20px 22px; border: 1px solid var(--border); border-left: 4px solid var(--primary); border-radius: var(--radius-lg); background: var(--bg-elevated); }
.seo-article__answer p:last-child { margin-bottom: 0; }
.seo-article__table-wrap { overflow-x: auto; margin: 24px 0; }
.seo-article table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.seo-article th,
.seo-article td { padding: 12px 14px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
.seo-article th { background: var(--bg-elevated); color: var(--text); }
.seo-article__checklist { list-style: none; padding-left: 0; }
.seo-article__checklist li { position: relative; padding-left: 28px; }
.seo-article__checklist li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 800; }
.seo-article__faq details { margin-bottom: 10px; border: 1px solid var(--border); border-radius: var(--radius); }
.seo-article__faq summary { padding: 15px 18px; color: var(--text); cursor: pointer; font-weight: 650; }
.seo-article__faq p { padding: 0 18px 16px; }
.seo-article__cta { margin-top: 38px; padding: 26px; border-radius: var(--radius-lg); background: var(--bg-elevated); border: 1px solid var(--border); }
.seo-article__cta .btn { margin-top: 4px; }
@media (max-width: 800px) {
  .seo-article__layout { grid-template-columns: 1fr; gap: 0; }
  .seo-article__toc { display: none; }
  .seo-article { padding-top: 36px; }
}