.wkb-shell{--wkb-ink:#202939;--wkb-muted:#667085;--wkb-line:#e8eaee;--wkb-accent:#635bff;box-sizing:border-box;display:grid;grid-template-columns:200px minmax(0,820px) 190px;gap:28px;max-width:1400px;margin:0 auto;padding:44px 24px 72px;color:var(--wkb-ink)}
.wkb-shell *{box-sizing:border-box}.wkb-sidebar,.wkb-toc{align-self:start;position:sticky;top:88px;max-height:calc(100vh - 108px);overflow-y:auto}.wkb-sidebar{border-right:1px solid var(--wkb-line);padding-right:26px}.wkb-toc{border-left:1px solid var(--wkb-line);padding-left:22px}.wkb-eyebrow{margin:0 0 8px;color:var(--wkb-muted);font-size:13px;font-weight:700;letter-spacing:.04em}.wkb-topic-title{margin:0 0 16px;font-size:17px;line-height:1.4}.wkb-lesson-list,.wkb-toc-list{margin:0;padding:0;list-style:none}.wkb-lesson-list li{margin:2px 0}.wkb-lesson-list a{display:block;padding:8px 10px;border-radius:7px;color:var(--wkb-muted);font-size:14px;line-height:1.45;text-decoration:none}.wkb-lesson-list a:hover,.wkb-lesson-list .is-current a{background:#f0efff;color:var(--wkb-accent);font-weight:700}.wkb-article{min-width:0}.wkb-article-header{padding-bottom:28px;border-bottom:1px solid var(--wkb-line);margin-bottom:34px}.wkb-breadcrumb{color:var(--wkb-accent);font-size:14px;text-decoration:none}.wkb-article h1{margin:10px 0 12px;font-size:38px;line-height:1.22;letter-spacing:-.03em}.wkb-meta{margin:0;color:var(--wkb-muted);font-size:14px}.wkb-prose{font-size:17px;line-height:1.9;word-break:break-word}.wkb-prose h2{margin:52px 0 20px;padding-top:8px;font-size:27px;line-height:1.35}.wkb-prose h3{margin:32px 0 14px;font-size:21px;line-height:1.4}.wkb-prose p,.wkb-prose ul,.wkb-prose ol{margin:0 0 20px}.wkb-prose a{color:var(--wkb-accent)}.wkb-prose blockquote{margin:24px 0;padding:12px 18px;border-left:4px solid #b8b4ff;background:#f7f7ff;color:#4b5565}.wkb-prose img{max-width:100%;height:auto;border-radius:10px}.wkb-prose table{width:100%;margin:26px 0;border:1px solid var(--wkb-line);border-collapse:collapse;background:#fff;font-size:15px;line-height:1.65}.wkb-prose th,.wkb-prose td{padding:11px 13px;border:1px solid var(--wkb-line);vertical-align:top;text-align:left}.wkb-prose th{background:#f5f5ff;color:var(--wkb-ink);font-weight:700}.wkb-prose tr:nth-child(even) td{background:#fcfcff}.wkb-toc-list li{margin:0 0 7px}.wkb-toc-list a{display:block;color:var(--wkb-muted);font-size:13px;line-height:1.45;text-decoration:none}.wkb-toc-list a:hover{color:var(--wkb-accent)}.wkb-toc-subitem a{padding-left:14px;font-size:12px}.wkb-mobile-fab,.wkb-mobile-drawer{display:none}.wkb-toc.is-empty{display:none}
@media (max-width:1080px){.wkb-shell{grid-template-columns:180px minmax(0,1fr) 170px;gap:20px;padding-left:20px;padding-right:20px}}
@media (max-width:820px){.wkb-shell{display:block;padding:22px 18px 64px}.wkb-sidebar,.wkb-toc{display:none}.wkb-article{margin:0}.wkb-article h1{font-size:31px}.wkb-prose{font-size:16px}.wkb-prose h2{font-size:24px;margin-top:38px}.wkb-mobile-fab{position:fixed;top:65vh;right:14px;z-index:90;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;width:50px;height:50px;padding:3px 0;border:0;border-radius:50%;transform:translateY(-50%);background:rgba(39,51,71,.5);color:#fff;box-shadow:0 8px 24px rgba(16,24,40,.18);backdrop-filter:blur(9px);font:inherit;font-weight:700}.wkb-mobile-fab span:first-child{font-size:17px;line-height:16px}.wkb-mobile-fab span:last-child{font-size:11px;line-height:13px}.wkb-mobile-drawer[hidden]{display:none}.wkb-mobile-drawer{position:fixed;inset:0;z-index:1000;display:block}.wkb-mobile-drawer-backdrop{position:absolute;inset:0;width:100%;border:0;background:rgba(16,24,40,.18)}.wkb-mobile-drawer-sheet{position:absolute;right:0;bottom:0;left:0;max-height:min(74vh,620px);overflow:auto;padding:10px 18px calc(22px + env(safe-area-inset-bottom));border-radius:18px 18px 0 0;background:rgba(255,255,255,.5);box-shadow:0 -12px 35px rgba(16,24,40,.14);backdrop-filter:blur(12px)}.wkb-mobile-drawer-header{display:flex;align-items:center;gap:8px;margin:0 -2px 14px;padding-bottom:10px;border-bottom:1px solid rgba(232,234,238,.75)}.wkb-mobile-drawer-tabs{display:flex;flex:1;gap:4px}.wkb-mobile-drawer-tabs button{padding:8px 11px;border:0;border-radius:8px;background:transparent;color:var(--wkb-muted);font:inherit;font-size:15px;font-weight:700}.wkb-mobile-drawer-tabs button[aria-selected="true"]{background:rgba(240,239,255,.75);color:var(--wkb-accent)}.wkb-mobile-drawer-close{width:34px;height:34px;border:0;border-radius:50%;background:rgba(243,244,246,.72);color:var(--wkb-ink);font-size:23px;line-height:1}.wkb-mobile-drawer-panel{display:none}.wkb-mobile-drawer-panel.is-active{display:block}.wkb-mobile-drawer .wkb-topic-title{margin-bottom:12px}.wkb-mobile-drawer .wkb-lesson-list a{padding:10px 11px;font-size:15px}.wkb-mobile-drawer .wkb-toc-list a{padding:7px 3px;font-size:14px}.wkb-mobile-drawer .wkb-toc-subitem a{padding-left:15px;font-size:13px}body.wkb-drawer-open{overflow:hidden}}