.learning-reader{grid-template-columns:230px minmax(0,760px) 170px;gap:38px;max-width:1380px;margin:auto;padding:40px 30px 80px;font-size:16px;line-height:1.65;display:grid}.reader-directory-sticky{scrollbar-width:thin;max-height:calc(100vh - 50px);position:sticky;top:25px;overflow:auto}.reader-back{color:var(--color-accent);padding:8px 0 18px;font-size:13px;display:block}.reader-directory-column h2{letter-spacing:0;margin:0 0 20px;font-size:16px;font-weight:700}.reader-directory summary{cursor:pointer;justify-content:space-between;gap:12px;margin-bottom:15px;font-size:13px;display:flex}.reader-directory summary span{color:var(--color-fg-muted);font-size:11px}.reader-directory nav{gap:3px;display:grid}.reader-directory a{color:var(--color-fg-muted);border-radius:6px;gap:10px;padding:10px;font-size:12px;line-height:1.7;display:flex}.reader-directory a span{flex-shrink:0;padding-top:2px;font-size:10px}.reader-directory a[aria-current=page]{background:var(--color-accent-soft);color:var(--color-accent);font-weight:600}.reader-article{min-width:0}.reader-breadcrumb{color:var(--color-fg-muted);margin-bottom:22px;font-size:12px}.reader-article>h1{letter-spacing:-.7px;overflow-wrap:anywhere;margin:20px 0 24px;font-size:32px;font-weight:700;line-height:1.65}.reader-page-meta{color:var(--color-fg-muted);align-items:center;gap:15px;font-size:12px;display:flex}.reader-access{border:1px solid var(--color-border);border-radius:4px;padding:4px 9px;font-size:11px}.reader-content-mode{border-bottom:1px solid var(--color-border);flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px;padding:12px 0 18px;font-size:12px;display:flex}.reader-content-mode>span{color:var(--color-fg-muted);margin-right:8px}.reader-content-mode strong{background:var(--color-brand);color:#fff;border:1px solid var(--color-brand);border-radius:6px;padding:8px 12px;font-size:12px}.reader-page-toc>div{scrollbar-width:thin;max-height:calc(100vh - 60px);font-size:12px;line-height:1.8;position:sticky;top:30px;overflow:auto}.reader-page-toc [data-toc-variant=wide]{max-height:none;display:block;overflow:visible}.reader-page-toc [data-toc-variant=narrow]{display:none}.reader-page-toc nav>p{letter-spacing:0;color:var(--color-fg);text-transform:none;margin:0 0 16px;padding:0;font-size:12px;display:block}.reader-page-toc nav a{color:var(--color-fg-muted);overflow-wrap:anywhere;background:0 0;border-radius:0;margin:0;padding:7px 0;font-size:0;font-weight:400;line-height:1.8;display:block}.reader-page-toc nav a:after{content:attr(title);font-size:12px}.reader-gate{background:var(--color-accent-soft);border:1px solid var(--color-border);border-radius:12px;margin:30px 0;padding:26px}.reader-gate h2{margin:0 0 16px;font-size:21px;font-weight:700}.reader-gate p{color:var(--color-fg-muted);margin:0 0 16px;font-size:14px;line-height:1.8}.reader-pagination{border-top:1px solid var(--color-border);grid-template-columns:1fr 1fr;gap:20px;margin-top:45px;padding-top:25px;display:grid}.reader-pagination a{border:1px solid var(--color-border);border-radius:10px;flex-direction:column;padding:18px;display:flex}.reader-pagination a>span:first-child{color:var(--color-fg-muted);margin-bottom:10px;font-size:12px;display:block}.reader-pagination a>span:last-child{font-size:14px;font-weight:700;line-height:1.7}.reader-page-next{text-align:left}@media (width<=1150px){.learning-reader{grid-template-columns:210px minmax(0,1fr);gap:28px}.reader-page-toc{display:none}}@media (width<=760px){.learning-reader{padding:25px 22px 50px;display:block}.reader-directory-sticky{max-height:none;margin-bottom:30px;position:static;overflow:visible}.reader-directory nav{border-bottom:1px solid var(--color-border);max-height:250px;overflow:auto}.reader-article>h1{font-size:27px}.reader-prose h1,.reader-prose h2{font-size:22px}.reader-prose h3{font-size:19px}.reader-pagination{grid-template-columns:1fr}.reader-prose pre{padding:15px;font-size:12px}.reader-prose button.cursor-zoom-in{margin:24px auto;padding:10px}}.reader-directory-mobile{display:none}@media (width<=760px){.reader-directory-mobile{display:block}.reader-directory-desktop{display:none}}.learning-reader .reader-prose h2{line-height:1.5}.reader-prose>h2:first-child{margin-top:40px}