.seoTopicPage,
.seoTopicPage body { min-height: 100%; height: auto; overflow: auto; }
.seoTopicPage body { background: linear-gradient(180deg, #edf4ff 0, #fbfdff 540px, var(--bg) 920px); }
.seoTopicHeader,
.seoTopicMain,
.seoTopicFooter { width: min(100% - 40px, 1140px); margin-inline: auto; }
.seoTopicHeader { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.seoTopicBrand { display: inline-flex; align-items: center; gap: 11px; color: var(--fg); font-weight: 780; text-decoration: none; }
.seoTopicBrand img { width: 42px; height: 42px; border-radius: 10px; }
.seoTopicHeader nav,
.seoTopicFooter nav { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; }
.seoTopicHeader nav a,
.seoTopicFooter a { color: var(--muted); font-size: 13px; text-decoration: none; }
.seoTopicHeader .seoHeaderCta,
.seoPrimary { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 11px 16px; border-radius: var(--radiusSm); background: var(--accent); color: #fff; font-weight: 760; text-decoration: none; }
.seoTopicHeader .seoHeaderCta:hover,
.seoPrimary:hover { background: var(--accent-strong); color: #fff; }
.seoBreadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; padding-top: 28px; color: var(--muted2); font-size: 12px; }
.seoBreadcrumbs a { color: var(--muted); }
.seoTopicHero { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); gap: clamp(42px, 8vw, 96px); align-items: center; min-height: 580px; padding: clamp(58px, 9vw, 104px) 0; }
.seoTopicHero h1 { max-width: 14ch; margin: 12px 0 22px; font-size: clamp(44px, 7vw, 76px); line-height: 1; letter-spacing: -.052em; }
.seoTopicHero > div > p { max-width: 62ch; margin: 0; color: var(--muted); font-size: clamp(16px, 1.8vw, 19px); line-height: 1.68; }
.seoTopicActions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 30px; }
.seoTopicActions > a:not(.seoPrimary) { font-weight: 720; text-decoration: none; }
.seoTopicHero aside { padding: 32px; border: 2px solid var(--accent); border-radius: var(--card-radius); background: #fff; box-shadow: var(--shadow); }
.seoTopicHero .seoTopicPhotoAside { overflow: hidden; padding: 0 32px 32px; }
.seoTopicPhotoAside > img { display: block; width: calc(100% + 64px); max-width: none; height: auto; aspect-ratio: 3 / 2; margin: 0 -32px 26px; object-fit: cover; object-position: center 42%; }
.seoTopicHero aside > span { display: block; color: var(--muted2); font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.seoTopicHero aside strong { display: block; margin-top: 12px; color: var(--fg); font-size: clamp(22px, 3vw, 32px); line-height: 1.25; }
.seoTopicHero aside p { margin: 24px 0 0; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); line-height: 1.6; }
.seoHighlights,
.seoGuidance,
.seoRelated,
.seoSample,
.seoFaq { display: grid; grid-template-columns: minmax(260px, .75fr) minmax(0, 1.25fr); gap: clamp(38px, 8vw, 100px); padding: clamp(72px, 10vw, 112px) 0; border-top: 1px solid var(--border); }
.seoHighlights h2,
.seoGuidance h2,
.seoRelated h2,
.seoFinal h2 { margin: 10px 0 0; font-size: clamp(30px, 4.2vw, 50px); line-height: 1.08; letter-spacing: -.04em; }
.seoHighlights ul { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.seoHighlights li { padding: 20px 22px; border-left: 4px solid var(--accent); background: var(--panel); box-shadow: var(--shadow-small); font-weight: 700; }
.seoGuidance ol { margin: 0; padding: 0; list-style: none; }
.seoGuidance li { display: grid; grid-template-columns: 42px 1fr; gap: 16px; align-items: start; padding: 0 0 28px; }
.seoGuidance li + li { padding-top: 28px; border-top: 1px solid var(--border); }
.seoGuidance li span { display: grid; width: 38px; height: 38px; place-items: center; border: 2px solid var(--accent); border-radius: 50%; font-weight: 800; }
.seoGuidance p { margin: 4px 0 0; color: var(--muted); line-height: 1.68; }
.seoRelatedGrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.seoRelatedGrid a { display: grid; gap: 7px; padding: 20px; border: 1px solid var(--border); border-radius: var(--radiusSm); background: var(--panel); color: var(--fg); text-decoration: none; box-shadow: var(--shadow-small); }
.seoRelatedGrid a:hover { border-color: var(--accent); }
.seoRelatedGrid span { color: var(--muted); font-size: 13px; line-height: 1.55; }
.seoFinal { display: flex; align-items: center; justify-content: space-between; gap: 34px; margin-bottom: 72px; padding: clamp(34px, 6vw, 60px); border-top: 7px solid var(--accent); background: var(--fg); color: var(--panel); }
.seoFinal h2 { max-width: 700px; }
.seoFinal .eyebrow { color: #b8c6da; }
.seoSample h2,
.seoFaq h2,
.seoArticleHero h1,
.seoArticleSection h2 { margin: 10px 0 18px; font-size: clamp(30px, 4.2vw, 50px); line-height: 1.08; letter-spacing: -.04em; }
.seoSample > div > p,
.seoArticleHero > p,
.seoArticleSection p { color: var(--muted); line-height: 1.7; }
.seoSampleGrid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.seoSample figure { margin: 0; padding: 8px; border: 1px solid var(--border); background: #fff; box-shadow: var(--shadow-small); }
.seoSample figure > img { display: block; width: 100%; height: auto; }
.seoSample figcaption { padding: 9px 4px 3px; color: var(--muted); font-size: 12px; font-weight: 700; text-align: center; }
.seoHighlights h3,
.seoGuidance h3 { margin: 0 0 14px; font-size: 20px; }
.seoHighlights h3:not(:first-child),
.seoGuidance h3:not(:first-child) { margin-top: 34px; }
.seoHighlights p { color: var(--muted); line-height: 1.65; }
.seoHighlights ul,
.seoGuidance ul { margin: 0; padding-left: 20px; color: var(--muted); line-height: 1.7; }
.seoFaq details { border-top: 1px solid var(--border); }
.seoFaq details:last-child { border-bottom: 1px solid var(--border); }
.seoFaq summary { padding: 22px 0; cursor: pointer; color: var(--fg); font-weight: 750; }
.seoFaq details p { margin: -8px 0 22px; color: var(--muted); line-height: 1.7; }
.seoReview { margin: 0 0 42px; color: var(--muted2); font-size: 12px; line-height: 1.6; }
.seoArticleHero { display: block; max-width: 850px; padding: clamp(70px, 11vw, 128px) 0; }
.seoArticleHero h1 { max-width: 18ch; font-size: clamp(42px, 7vw, 72px); }
.seoArticleHero > p { max-width: 65ch; font-size: 18px; }
.seoArticlePhoto { max-width: 920px; margin: -48px 0 88px; overflow: hidden; border: 1px solid var(--border); border-radius: var(--card-radius); background: var(--panel); box-shadow: var(--shadow-small); }
.seoArticlePhoto img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 7; object-fit: cover; object-position: center 42%; }
.seoArticlePhoto figcaption { padding: 13px 17px 15px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.seoArticleSection { display: grid; grid-template-columns: 48px minmax(0, 760px); gap: 22px; padding: 48px 0; border-top: 1px solid var(--border); }
.seoArticleSection > span { display: grid; width: 42px; height: 42px; place-items: center; border: 2px solid var(--accent); border-radius: 50%; font-weight: 800; }
.seoArticleSection h2 { font-size: clamp(27px, 3.3vw, 40px); }
.seoTopicFooter { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 0 48px; border-top: 1px solid var(--border); color: var(--muted2); font-size: 12px; }
@media (max-width: 820px) {
  .seoTopicHero,
  .seoHighlights,
  .seoGuidance,
  .seoRelated,
  .seoSample,
  .seoFaq { grid-template-columns: 1fr; }
  .seoTopicHero { min-height: 0; }
}
@media (max-width: 600px) {
  .seoTopicHeader,
  .seoTopicMain,
  .seoTopicFooter { width: min(100% - 28px, 1140px); }
  .seoTopicHeader nav > a:not(.seoHeaderCta) { display: none; }
  .seoTopicHero h1 { font-size: clamp(38px, 13vw, 58px); }
  .seoArticlePhoto { margin-top: -34px; margin-bottom: 64px; }
  .seoArticlePhoto img { aspect-ratio: 3 / 2; }
  .seoRelatedGrid,
  .seoSampleGrid { grid-template-columns: 1fr; }
  .seoFinal,
  .seoTopicFooter { align-items: stretch; flex-direction: column; }
}