:root {
  color-scheme: light;
  --article-bg: #ffffff; --article-surface: #f7f8fa; --article-fg: #17202e; --article-muted: #606b7a;
  --article-border: #dfe4eb; --article-accent: #2563eb; --article-info: #eef4ff; --article-warning: #fff7e6;
}
:root.dark {
  color-scheme: dark;
  --article-bg: #10151e; --article-surface: #19212e; --article-fg: #edf1f7; --article-muted: #a9b5c5;
  --article-border: #303b4d; --article-accent: #93b9ff; --article-info: #182941; --article-warning: #302719;
}
body.article-page, .dark body.article-page { background: var(--article-bg); color: var(--article-fg); }
.page-shell { max-width: 1200px; margin: auto; padding: 0 28px 72px; font: 17px/1.9 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; }
.article-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); gap: 64px; align-items: start; }
.article-layout a, .article-footer a { color: var(--article-accent); text-underline-offset: 4px; }
.article-layout a:hover, .article-footer a:hover { text-decoration-thickness: 2px; }
.article-layout article { min-width: 0; }
.article-layout h1 { font-size: clamp(30px, 3.4vw, 46px); line-height: 1.3; letter-spacing: -.035em; margin: 0 0 22px; font-weight: 800; overflow-wrap: anywhere; }
.article-layout h2 { font-size: 27px; line-height: 1.5; letter-spacing: -.025em; margin: 0 0 20px; }
.article-layout h3 { font-size: 20px; line-height: 1.6; margin: 26px 0 12px; }
.article-layout p { margin: 0 0 18px; overflow-wrap: anywhere; }
.article-layout li { margin: 8px 0; overflow-wrap: anywhere; }
.article-layout ul, .article-layout ol { padding-left: 24px; margin: 14px 0 22px; }
.article-layout ul { list-style: disc; }
.article-layout ol { list-style: decimal; }
.article-layout .eyebrow { font-size: 12px; font-weight: 750; letter-spacing: .12em; color: var(--article-accent); margin: 0 0 16px; }
.article-layout .lead { font-size: 19px; line-height: 1.85; color: var(--article-muted); margin: 0 0 24px; }
.article-meta { font-size: 13px; color: var(--article-muted); padding-bottom: 26px; border-bottom: 1px solid var(--article-border); }
.article-layout article section { margin-top: 52px; scroll-margin-top: 28px; }
.toc { position: sticky; top: 28px; font-size: 14px; line-height: 1.6; padding: 6px 0 18px; }
.toc strong { display: block; font-size: 13px; letter-spacing: .08em; margin-bottom: 18px; }
.toc nav { display: flex; flex-direction: column; border-left: 1px solid var(--article-border); }
.toc a { display: block; color: var(--article-muted); text-decoration: none; padding: 8px 16px; }
.toc a:hover, .toc a:focus { color: var(--article-accent); border-left: 2px solid var(--article-accent); margin-left: -1px; background: var(--article-info); }
.article-layout .takeaways { background: var(--article-surface); border-radius: 8px; padding: 24px 28px; margin: 30px 0 38px; }
.article-layout .takeaways ul { margin-bottom: 0; }
.article-layout .notice, .article-layout .warning { padding: 18px 22px; margin: 24px 0; background: var(--article-info); border-left: 3px solid var(--article-accent); }
.article-layout .warning { background: var(--article-warning); border-color: #d99a20; }
.article-layout .notice p:last-child, .article-layout .warning p:last-child { margin: 0; }
.article-layout .checkpoint { border-top: 1px solid var(--article-border); padding-top: 14px; margin-top: 22px; font-size: 15px; color: var(--article-muted); }
.article-layout .checkpoint strong { color: var(--article-fg); }
.article-layout code { font: .88em/1.7 ui-monospace, SFMono-Regular, Consolas, monospace; background: var(--article-surface); border-radius: 3px; padding: 2px 4px; overflow-wrap: anywhere; }
.article-layout pre { background: var(--article-surface); border: 1px solid var(--article-border); padding: 20px 22px; border-radius: 7px; overflow-x: auto; line-height: 1.8; margin: 20px 0; }
.article-layout pre code { background: none; padding: 0; border: 0; overflow-wrap: normal; }
.article-layout .table-wrap { overflow-x: auto; margin: 24px 0; }
.article-layout table { border-collapse: collapse; width: 100%; font-size: 14px; line-height: 1.8; }
.article-layout th, .article-layout td { padding: 14px 16px; border-bottom: 1px solid var(--article-border); text-align: left; vertical-align: top; }
.article-layout th { background: var(--article-surface); font-weight: 700; }
.article-layout td:first-child { font-weight: 600; }
.article-layout .tool-callout { border: 1px solid var(--article-border); border-left: 3px solid var(--article-accent); padding: 22px 24px; border-radius: 5px; margin: 24px 0; }
.article-layout .tool-callout strong { display: block; margin-bottom: 8px; }
.article-layout .tool-callout p:last-child { margin-bottom: 0; }
.article-layout .download-cta { background: var(--article-info); padding: 30px; border-radius: 8px; }
.article-layout .download-cta h2 { font-size: 26px; }
.article-layout .button { display: inline-block; background: #2563eb; color: white; text-decoration: none; border-radius: 5px; padding: 10px 20px; font-size: 15px; font-weight: 600; }
.article-layout .related { display: flex; flex-wrap: wrap; gap: 14px 24px; margin-top: 24px; font-size: 15px; }
.article-layout details { padding: 18px 0; border-bottom: 1px solid var(--article-border); }
.article-layout summary { font-weight: 650; cursor: pointer; }
.article-layout details p { margin: 14px 0 0; }
.article-layout .references { font-size: 13px; color: var(--article-muted); margin-top: 40px; }
.article-layout .references summary { font-weight: 500; }
.article-layout .muted { color: var(--article-muted); }
.article-footer { border-top: 1px solid var(--article-border); padding: 26px 28px; max-width: 1200px; margin: auto; color: var(--article-muted); font-size: 13px; }
.article-footer nav { display: flex; flex-wrap: wrap; gap: 24px; }
.article-footer a { color: var(--article-muted); }
.article-layout :focus-visible, .article-footer :focus-visible { outline: 3px solid var(--article-accent); outline-offset: 4px; }
@media (max-width: 1000px) {
  .article-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 36px; }
  .article-layout h1 { font-size: 36px; }
}
@media (max-width: 760px) {
  .page-shell { padding: 0 20px 48px; }
  .article-layout { display: flex; flex-direction: column; gap: 0; align-items: stretch; }
  .article-layout article { display: contents; }
  .article-header { order: -2; }
  .toc { position: static; width: 100%; background: var(--article-surface); padding: 18px; border-radius: 6px; order: -1; margin: 28px 0 0; }
  .toc strong { margin-bottom: 10px; }
  .toc nav { display: grid; grid-template-columns: 1fr 1fr; gap: 2px 12px; border: 0; }
  .toc a { padding: 6px 0; font-size: 13px; }
  .toc a:hover { border: 0; margin: 0; }
  .article-layout h1 { font-size: 32px; }
  .article-layout h2 { font-size: 25px; }
  .article-layout .lead { font-size: 18px; }
  .article-layout .takeaways { padding: 20px; }
  .article-layout article section { margin-top: 40px; }
  .article-layout pre { padding: 16px; font-size: 14px; }
  .article-layout th, .article-layout td { padding: 12px; min-width: 110px; }
  .article-layout .download-cta { padding: 24px; }
}
@media print {
  body.article-page > div > nav, .site-breadcrumb, .toc, .article-footer { display: none; }
  .article-layout { display: block; }
  .page-shell { max-width: none; padding: 0; }
  body.article-page { background: white; color: black; }
  .article-layout pre { white-space: pre-wrap; }
  .article-layout a { color: black; }
}