.tutorial-page { --guide-ink: #28262e; }
.tutorial-page .site-header nav { display: flex; margin-left: auto; gap: 28px; font-size: 16px; }
.tutorial-page .site-header nav a[aria-current="page"] { color: var(--accent-deep); }
.tutorial-page main { padding-top: 32px; }
.guide-index-hero { padding: 48px; background: var(--paper); border-radius: var(--radius); display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.guide-index-hero h1 { font-size: clamp(36px, 4.3vw, 62px); line-height: 1.2; letter-spacing: -.055em; }
.guide-index-hero p { margin-top: 22px; max-width: 26em; font-size: 18px; line-height: 1.8; }
.guide-index-hero figure { margin: 0; padding: 24px 0; background: var(--lavender); border-radius: 16px; overflow: hidden; }
.guide-index-hero img { width: 100%; height: auto; }
.guide-list { list-style: none; margin: 36px 0 0; padding: 0; }
.guide-list > li { margin-top: 12px; background: var(--paper); }
.guide-list > li:first-child { border-radius: 24px 24px 0 0; }
.guide-list > li:last-child { border-radius: 0 0 24px 24px; }
.guide-list a { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 32px 48px; min-height: 132px; }
.guide-list h2 { font-size: 28px; line-height: 1.4; letter-spacing: -.035em; }
.guide-list p { margin-top: 8px; font-size: 18px; line-height: 1.7; }
.guide-arrow { flex: none; font-size: 28px; transition: transform 160ms var(--ease-out); }
.reading-layout { display: grid; grid-template-columns: 200px minmax(0, 800px); justify-content: space-between; gap: 56px; padding: clamp(28px, 4vw, 56px); background: var(--paper); border-radius: var(--radius); }
.reading-nav { min-width: 0; align-self: start; position: sticky; top: 36px; font-size: 16px; }
.reading-nav > a { display: inline-flex; align-items: center; min-height: 44px; color: var(--accent-deep); margin-bottom: 24px; }
.article-toc summary { display: block; list-style: none; color: var(--muted); margin-bottom: 14px; }
.article-toc summary::-webkit-details-marker { display: none; }
.article-toc-mobile { display: none; }
.article-toc ul { list-style: none; padding: 0; margin: 0; }
.article-toc li + li { margin-top: 5px; }
.article-toc a { display: block; padding-block: 8px; line-height: 1.6; }
.article-toc a.is-current { color: var(--accent-deep); font-weight: 600; }
.guide-article { min-width: 0; font-size: 18px; line-height: 1.9; overflow-wrap: anywhere; }
.article-heading h1 { font-size: clamp(34px, 3.8vw, 54px); line-height: 1.25; letter-spacing: -.05em; }
.article-heading .title-phrase { white-space: nowrap; }
.article-scope { font-size: 16px; color: var(--muted); margin-top: 20px; line-height: 1.7; }
.article-intro { margin-top: 28px; }
.guide-article p + p { margin-top: 18px; }
.article-section { margin-top: 48px; scroll-margin-top: 32px; }
.guide-article h2 { font-size: 28px; line-height: 1.4; letter-spacing: -.035em; margin-bottom: 20px; scroll-margin-top: 32px; }
.guide-article h3 { font-size: 22px; line-height: 1.5; margin: 28px 0 12px; }
.guide-article a { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.guide-article :is(ol, ul) { padding-left: 1.6em; margin: 20px 0; }
.guide-article li { padding-left: .25em; }
.guide-article li + li { margin-top: 14px; }
.guide-article code { font-family: inherit; font-size: .95em; background: var(--lavender-soft); padding: 2px 5px; border-radius: 4px; overflow-wrap: anywhere; }
.guide-article strong { font-weight: 650; }
.guide-article table { border-collapse: collapse; width: 100%; margin: 24px 0; font-size: 16px; line-height: 1.8; }
.guide-article :is(th, td) { text-align: left; vertical-align: top; padding: 14px 16px; }
.guide-article th { background: var(--lavender); font-weight: 600; }
.guide-article td { background: #f5f4f8; border-top: 4px solid var(--paper); }
.guide-article :is(th, td):first-child { width: 32%; }
.related-guides { margin-top: 64px; }
.related-guides > h2 { font-size: 28px; line-height: 1.4; letter-spacing: -.035em; }
.related-guides ul { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; padding: 0; margin: 24px 0 0; }
.related-guides a { display: flex; align-items: start; justify-content: space-between; gap: 16px; font-size: 20px; font-weight: 550; line-height: 1.5; min-height: 48px; padding-block: 8px; }
.related-guides a > span:last-child { flex: none; }
.tutorial-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; padding-block: 64px 32px; font-size: 16px; }
.tutorial-footer .brand { font-size: 18px; }
.tutorial-footer nav { display: flex; flex-wrap: wrap; gap: 24px; }
@media (hover: hover) and (pointer: fine) {
  .guide-list a:hover h2, .article-toc a:hover, .related-guides a:hover, .tutorial-footer > a:hover { color: var(--accent-deep); }
  .guide-list a:hover .guide-arrow { transform: translate(3px, -3px); }
  .guide-article a:hover { text-decoration-thickness: 2px; }
}
@media (min-width: 1001px) {
  .article-toc summary { pointer-events: none; }
}
@media (max-width: 1000px) {
  .reading-layout { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .reading-nav { display: none; }
  .reading-nav > a { margin-bottom: 0; }
  .reading-nav .article-toc { display: none; }
  .article-toc-mobile { display: block; margin-top: 24px; font-size: 16px; line-height: 1.6; }
  .article-toc { background: var(--ground); padding: 8px 18px; border-radius: 12px; }
  .article-toc summary { cursor: pointer; padding-block: 10px; margin-bottom: 0; color: var(--ink); }
  .article-toc summary::after { content: "+"; float: right; }
  .article-toc[open] summary::after { content: "−"; }
  .article-toc nav { padding-bottom: 10px; }
  .article-toc ul { display: grid; grid-template-columns: 1fr 1fr; column-gap: 28px; }
  .guide-article .article-toc ul { padding: 0; margin: 0; }
  .guide-article .article-toc li { padding: 0; }
  .guide-article .article-toc li + li { margin-top: 5px; }
  .guide-article .article-toc a { color: var(--ink); text-decoration: none; }
  .guide-article .article-toc a.is-current { color: var(--accent-deep); }
  .guide-index-hero { padding: 32px; gap: 28px; }
  .guide-index-hero h1 { font-size: 42px; }
  .guide-list a { padding-inline: 32px; }
  .related-guides ul { gap: 24px; }
}
@media (max-width: 650px) {
  .tutorial-page .site-header nav { gap: 20px; }
  .tutorial-page main { padding-top: 18px; }
  .tutorial-page .site-header .brand-cn { display: none; }
  .guide-index-hero { padding: 28px 24px; grid-template-columns: 1fr; gap: 28px; }
  .guide-index-hero h1 { font-size: 36px; }
  .guide-index-hero p { font-size: 16px; margin-top: 16px; }
  .guide-index-hero figure { padding-block: 18px; border-radius: 12px; }
  .guide-list { margin-top: 24px; }
  .guide-list a { padding: 25px 24px; gap: 18px; }
  .guide-list h2 { font-size: 24px; }
  .guide-list p { font-size: 16px; line-height: 1.75; }
  .guide-arrow { font-size: 24px; }
  .reading-layout { padding: 24px 20px 32px; gap: 20px; }
  .article-heading h1 { font-size: clamp(30px, 7.5vw, 34px); line-height: 1.35; }
  .article-scope { font-size: 16px; margin-top: 16px; }
  .guide-article { font-size: 17px; line-height: 1.9; }
  .guide-article h2 { font-size: 24px; line-height: 1.5; margin-bottom: 16px; }
  .guide-article h3 { font-size: 20px; }
  .article-section { margin-top: 36px; }
  .article-intro { margin-top: 24px; }
  .article-toc ul { grid-template-columns: 1fr; }
  .guide-article :is(ol, ul) { padding-left: 1.4em; }
  .guide-article :is(th, td) { padding: 10px; }
  .related-guides { margin-top: 40px; }
  .related-guides > h2 { font-size: 24px; }
  .related-guides ul { grid-template-columns: 1fr; gap: 8px; margin-top: 16px; }
  .related-guides a { font-size: 18px; }
  .tutorial-footer { padding-top: 44px; gap: 16px; }
  .tutorial-footer .brand img { width: 28px; height: 28px; }
}
@media (prefers-reduced-motion: no-preference) {
  .guide-arrive { animation: guide-arrive 360ms var(--ease-out) both; }
  @keyframes guide-arrive { from { opacity: .75; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  .tutorial-page .guide-arrow { transition: none; }
  .guide-list a:hover .guide-arrow { transform: none; }
}