.seo-content, .seo-loading, .guide-page {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #202521; line-height: 1.75;
}
.seo-content { max-width: 1120px; margin: 24px auto; padding: 16px 24px; border-top: 1px solid #dde2dc; font-size: 13px; }
.seo-content nav, .guide-nav { display: flex; flex-wrap: wrap; gap: 12px 24px; }
.seo-content a, .seo-loading a, .guide-page a { color: #17705b; text-underline-offset: 3px; }
.seo-content details { margin-top: 12px; }
.seo-content summary { cursor: pointer; color: #586158; }
.seo-content h2 { font-size: 18px; }
.seo-content h3 { font-size: 15px; }
.seo-loading { max-width: 860px; margin: 32px auto; padding: 0 20px; }
.seo-loading h1 { font-size: clamp(24px, 4vw, 34px); line-height: 1.4; }
.seo-loading button { min-height: 44px; padding: 8px 16px; border: 1px solid #17705b; border-radius: 5px; color: #fff; background: #17705b; font: inherit; cursor: pointer; }
.seo-loading button:focus-visible { outline: 2px solid #17705b; outline-offset: 3px; }
.guide-page { margin: 0; background: #f5f7f4; font-size: 16px; }
.guide-nav, .guide-main, .guide-footer { max-width: 900px; margin: auto; padding: 20px 24px; }
.guide-nav { border-bottom: 1px solid #dde2dc; font-size: 14px; }
.guide-nav .guide-brand { font-weight: 700; margin-right: auto; text-decoration: none; }
.guide-main { background: #fff; }
.guide-main h1 { margin: 12px 0; font-size: clamp(25px, 4vw, 34px); line-height: 1.45; }
.guide-main h2 { margin-top: 32px; font-size: 23px; }
.guide-main h3 { font-size: 18px; }
.guide-main .guide-intro, .guide-footer { color: #586158; }
.guide-main section { scroll-margin-top: 16px; }
.guide-main .guide-toc { padding: 16px 20px; background: #f5f7f4; border: 1px solid #dde2dc; }
.guide-main .guide-formula { padding: 12px 16px; border-left: 3px solid #17705b; background: #e5f2ed; }
.guide-main .guide-action { display: inline-block; padding: 8px 16px; border: 1px solid #17705b; border-radius: 5px; text-decoration: none; }
.guide-footer { font-size: 13px; }
@media (max-width: 480px) {
  .seo-content, .guide-nav, .guide-main, .guide-footer { padding-right: 16px; padding-left: 16px; }
}