.seo-page { background: var(--paper); color: var(--paper-ink); }
  .seo-page .masthead { position: relative; background: var(--night); height: auto; min-height: 96px; }
  .seo-page .masthead nav a { color: var(--ink); }
  .seo-main { max-width: 880px; margin: 0 auto; padding: 80px 40px 96px; }
  .seo-main h1 { color: var(--paper-ink); font-size: clamp(40px, 6vw, 72px); line-height: 1.05; letter-spacing: -.045em; }
  .seo-lead { margin-top: 24px; max-width: 64ch; font-size: 18px; line-height: 1.7; }
  .seo-toc { display: flex; flex-wrap: wrap; gap: 8px 24px; margin: 32px 0 48px; }
  .seo-toc a { color: var(--paper-ink); text-decoration: underline; text-underline-offset: 4px; padding: 8px 0; }
  .seo-section { padding: 36px 0; border-top: 1px solid var(--stroke); scroll-margin-top: 24px; }
  .seo-section h2 { color: var(--paper-ink); font-size: clamp(26px, 3.5vw, 36px); line-height: 1.2; letter-spacing: -.025em; }
  .seo-section p, .seo-section li { font-size: 17px; line-height: 1.75; }
  .seo-section p { margin-top: 20px; }
  .seo-section ul { margin: 20px 0 0; padding-left: 24px; }
  .seo-section li { margin-top: 12px; }
  .seo-close { border-top: 1px solid var(--stroke); padding-top: 40px; }
  .seo-close h2 { color: var(--paper-ink); font-size: 36px; line-height: 1.2; }
  .seo-close p { font-size: 17px; margin: 20px 0; }
  .seo-close .button { text-decoration: none; min-height: 48px; }
  .seo-page a:focus-visible { outline: 3px solid currentColor; outline-offset: 5px; }
  @media (max-width: 720px) {
    .seo-page .masthead { display: flex; flex-direction: row; flex-wrap: wrap; align-items: center; gap: 16px; padding: 20px 24px; min-height: 84px; }
    .seo-page .masthead nav { display: flex; flex-wrap: wrap; gap: 16px; width: auto; margin-left: auto; }
    .seo-page .masthead nav a { min-height: 44px; display: inline-flex; align-items: center; }
    .seo-main { padding: 48px 24px 64px; }
    .seo-lead, .seo-section p, .seo-section li { font-size: 16px; }
    .seo-toc { margin-bottom: 32px; }
  }
  .seo-cta-top { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 28px; }
  .seo-cta-top .button { text-decoration: none; min-height: 48px; }
  .seo-cta-top span { font-size: 15px; opacity: .8; }
  .seo-steps { margin: 20px 0 0; padding-left: 24px; }
  .seo-steps li { margin-top: 12px; font-size: 17px; line-height: 1.75; padding-left: 4px; }
  .seo-section a { color: var(--paper-ink); text-decoration: underline; text-underline-offset: 4px; }
  .seo-related { margin-top: 56px; border-top: 1px solid var(--stroke); padding-top: 32px; }
  .seo-related h2 { color: var(--paper-ink); font-size: 22px; letter-spacing: -.01em; }
  .seo-related ul { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
  .seo-related li { display: grid; gap: 4px; }
  .seo-related a { color: var(--paper-ink); font-weight: 700; text-decoration: underline; text-underline-offset: 4px; padding: 6px 0; }
  .seo-related span { font-size: 15px; line-height: 1.5; opacity: .8; }
  .seo-page .masthead nav { display: flex; gap: 24px; align-items: center; }
  @media (max-width: 720px) {
    .seo-steps li { font-size: 16px; }
    .seo-page .masthead nav { gap: 16px; }
  }