:root{--paper: #fafafa;--surface: #f1f1ef;--highlight: #e8eef0;--line: #e5e5e2;--muted: #767672;--text: #4a4a47;--strong: #242423;--link: #315f78;--accent: #52796f;color-scheme:light}:root[data-theme=dark]{--paper: #171716;--surface: #242422;--highlight: #273136;--line: #353533;--muted: #9f9e98;--text: #d1d0ca;--strong: #f0efeb;--link: #8db6cc;--accent: #9bc2b6;color-scheme:dark}*{box-sizing:border-box}html{width:100%;overflow-x:hidden;scroll-behavior:smooth;scroll-padding-top:2rem;text-size-adjust:none}body{margin:0;background:var(--paper);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.7}body.search-is-open{overflow:hidden}::selection{background:color-mix(in srgb, var(--accent) 28%, rgba(0,0,0,0))}a{color:var(--link);font-weight:600;text-decoration:none;transition:color 120ms ease}a:hover{color:var(--accent)}:focus-visible{outline:2px solid var(--link);outline-offset:3px}button,input{color:inherit;font:inherit}.site-shell{display:grid;grid-template-columns:240px minmax(0, 760px) minmax(0, 240px);grid-template-rows:minmax(0, 1fr) auto;grid-template-areas:"sidebar main right" "sidebar footer right";column-gap:8px;width:min(100% - 48px,1500px);min-height:100vh;margin:0 auto}.sidebar,.right-sidebar{position:sticky;top:0;align-self:start;height:100vh;padding:6rem 2rem 2rem}.sidebar{grid-area:sidebar;display:flex;flex-direction:column;align-items:flex-start;gap:1.2rem}.right-sidebar{grid-area:right}.right-sidebar:empty{display:none}.site-title{color:var(--strong);font-size:1.65rem;font-weight:700;line-height:1.2}.site-navigation{display:flex;flex-direction:column;align-items:flex-start;gap:.42rem}.site-navigation a{padding:0;color:var(--text);font-size:.95rem;font-weight:400;line-height:1.4}.site-navigation a[aria-current]{color:var(--strong);font-weight:600}.sidebar-tools{display:flex;flex-direction:row;align-items:center;gap:1rem;min-height:32px}.language-switcher{display:flex;align-items:center;gap:.3rem;color:var(--muted);font-size:.76rem;line-height:1}.language-switcher a{color:var(--muted);font-weight:500}.language-switcher a[aria-current=page]{color:var(--strong);font-weight:700}.search-open,.theme-toggle,.search-close{border:0;padding:0;background:rgba(0,0,0,0);cursor:pointer}.search-open{display:flex;align-items:center;gap:.45rem;color:var(--text);font-size:.95rem;font-weight:400}.search-open svg,.search-field svg{width:1rem;fill:none;stroke:currentColor;stroke-width:2}.theme-toggle{position:relative;width:20px;height:32px}.theme-icon{position:absolute;top:6px;left:0;width:20px;height:20px;fill:none;stroke:var(--text);stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8}:root[data-theme=light] .theme-icon-moon,:root[data-theme=dark] .theme-icon-sun{display:none}main{grid-area:main;min-width:0;padding-top:6rem}.site-footer{grid-area:footer;align-self:end;margin-top:4rem;padding:1.75rem 0 2.5rem;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}.site-footer p{margin:0}.site-footer a{font-weight:500}.site-footer-primary,.site-footer-secondary{display:flex;justify-content:space-between;gap:1.5rem}.site-footer-primary{align-items:flex-start}.site-footer-secondary{align-items:center;margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--line)}.site-footer-identity{display:grid;gap:.15rem}.site-footer-title{color:var(--strong);font-size:1rem;font-weight:700 !important}.site-footer-reading,.site-footer-utility{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem 1rem}.site-footer-reading{justify-content:flex-end}.site-footer-utility{justify-content:flex-start}h1,h2,h3,h4,h5,h6{color:var(--strong);line-height:1.25;letter-spacing:0;overflow-wrap:anywhere}h1{margin:0 0 1.25rem;font-size:1.9rem}.intro{margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid var(--line);font-size:1.05rem}.intro>:first-child{margin-top:0}.intro>:last-child{margin-bottom:0}.article-list>h1{font-size:1rem}.article-row{padding:1.15rem 0 1.25rem;border-top:1px solid var(--line)}.article-row h2{margin:0;font-size:1.08rem}.article-row p{max-width:62ch;margin:.45rem 0}.article-row time,.article-meta{color:var(--muted);font-size:.92rem}.article-header{margin-bottom:2rem;padding-bottom:1.25rem;border-bottom:1px solid var(--line)}.breadcrumbs{display:flex;flex-wrap:wrap;gap:.25rem .45rem;margin-bottom:1.25rem;color:var(--muted);font-size:.82rem}.breadcrumbs a{color:var(--muted);font-weight:500}.breadcrumbs a:hover{color:var(--link)}.breadcrumbs [aria-current=page]{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.article-header h1{margin-bottom:.25rem}.article-meta{margin:0}.article-body{overflow-wrap:break-word;font-size:1.05rem;line-height:1.78}.article-body>:first-child{margin-top:0}.article-body h2{margin-top:2.35em;font-size:1.45rem}.article-body h3{margin-top:2em;font-size:1.2rem}.article-body h4{margin-top:1.8em;font-size:1.05rem}.article-body h5,.article-body h6{margin-top:1.6em;font-size:1rem}.article-body p{margin:1em 0}.article-body ul,.article-body ol{padding-left:1.45em}.article-body li{margin:.3em 0}.article-body li>p{margin:.35em 0}.article-body a{text-decoration:underline;text-decoration-color:color-mix(in srgb, var(--link) 35%, rgba(0,0,0,0));text-underline-offset:.18em}.article-body pre{position:relative;overflow-x:auto;padding:1rem;border:1px solid var(--line);background:var(--surface);line-height:1.55}.article-body pre.code-block-enhanced{padding-top:2.75rem}.article-body code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9em}.article-body :not(pre)>code,.empty-state code{padding:.12em .35em;background:var(--surface)}.article-body blockquote{margin:1.25rem 0;padding-left:1rem;border-left:3px solid var(--link);color:var(--muted)}.article-body blockquote>:first-child{margin-top:0}.article-body blockquote>:last-child{margin-bottom:0}.article-body table{display:block;width:max-content;max-width:100%;overflow-x:auto;border-collapse:collapse}.article-body th,.article-body td{padding:.45rem .7rem;border:1px solid var(--line);text-align:left}.article-body hr{margin:2.5rem 0;border:0;border-top:1px solid var(--line)}.article-body kbd{padding:.12em .38em;border:1px solid var(--line);border-bottom-width:2px;background:var(--surface);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85em}.article-body details{margin:1.25rem 0;padding:.75rem 1rem;border:1px solid var(--line)}.article-body summary{color:var(--strong);cursor:pointer;font-weight:600}.article-body input[type=checkbox]{width:1rem;height:1rem;margin:0 .35rem 0 -1.35rem;accent-color:var(--link);vertical-align:-.12em}.article-body li:has(>input[type=checkbox]){list-style:none}.article-body del{color:var(--muted)}.heading-anchor{margin-left:.4em;color:var(--muted);font-size:.75em;font-weight:500;opacity:0;text-decoration:none !important}.article-body :is(h2,h3,h4,h5,h6):hover .heading-anchor,.heading-anchor:focus-visible{opacity:1}.footnotes{margin-top:2rem;border-top:1px solid var(--line);font-size:.94rem}.footnote-definition-label{color:var(--muted)}.markdown-alert-note,.markdown-alert-tip,.markdown-alert-important,.markdown-alert-warning,.markdown-alert-caution{padding:.8rem 1rem;border:1px solid var(--line);border-left-width:3px;background:color-mix(in srgb, var(--link) 5%, var(--paper));color:var(--text)}.markdown-alert-note::before,.markdown-alert-tip::before,.markdown-alert-important::before,.markdown-alert-warning::before,.markdown-alert-caution::before{display:block;margin-bottom:.35rem;color:var(--strong);font-size:.82rem;font-weight:700}.markdown-alert-note::before{content:"提示"}.markdown-alert-tip::before{content:"建议"}.markdown-alert-important::before{content:"重要"}.markdown-alert-warning::before{content:"注意"}.markdown-alert-caution::before{content:"警告"}html[lang=en] .markdown-alert-note::before{content:"Note"}html[lang=en] .markdown-alert-tip::before{content:"Tip"}html[lang=en] .markdown-alert-important::before{content:"Important"}html[lang=en] .markdown-alert-warning::before{content:"Warning"}html[lang=en] .markdown-alert-caution::before{content:"Caution"}.markdown-alert-tip{border-left-color:var(--accent)}.markdown-alert-important{border-left-color:#7564a7}.markdown-alert-warning{border-left-color:#a87622}.markdown-alert-caution{border-left-color:#a94b4b}.code-label{position:absolute;top:.55rem;left:1rem;right:3rem;overflow:hidden;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.75rem;line-height:1.5;text-overflow:ellipsis;white-space:nowrap}.code-copy{position:absolute;z-index:2;top:.45rem;right:.55rem;display:grid;width:1.9rem;height:1.9rem;place-items:center;border:1px solid var(--line);background:var(--paper);color:var(--muted);cursor:pointer;opacity:0;transition:border-color 120ms ease,color 120ms ease,opacity 120ms ease}.code-copy svg{width:1rem;height:1rem;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8}.code-block-enhanced:hover .code-copy,.code-block-enhanced:focus-within .code-copy,.code-copy:focus-visible{opacity:1}.code-copy:hover{border-color:var(--link);color:var(--link)}.tags{display:flex;flex-wrap:wrap;gap:.35rem .8rem;margin:.55rem 0 0;padding:0;list-style:none}.tags a{font-size:.9rem;font-weight:500}.empty-state{margin-top:1.5rem;color:var(--muted);font-size:.95rem}.section-intro{margin-bottom:1.5rem;color:var(--muted)}.section-intro>:first-child{margin-top:0}.page-summary{max-width:62ch;margin:0 0 1.75rem;color:var(--muted)}.page-summary>:first-child{margin-top:0}.page-summary>:last-child{margin-bottom:0}.tag-cloud{display:flex;flex-wrap:wrap;align-items:baseline;gap:.7rem 1.15rem;margin-top:1.5rem}.tag-cloud a{display:inline-flex;align-items:baseline;gap:.35rem}.tag-cloud span{color:var(--muted);font-size:.82rem;font-weight:400}.tag-cloud .tag-weight-2 strong{font-size:1.2rem}.tag-cloud .tag-weight-1 strong{font-size:1.05rem}.tag-cloud .tag-weight-0 strong{font-size:.95rem}.archive-year{display:grid;grid-template-columns:5rem minmax(0, 1fr);gap:1.5rem;padding:1.25rem 0;border-top:1px solid var(--line)}.archive-year>h2{margin:0;font-size:1.15rem}.archive-year ol{display:grid;gap:.75rem;margin:0;padding:0;list-style:none}.archive-year li{display:grid;grid-template-columns:6.5rem minmax(0, 1fr);gap:1rem;align-items:baseline}.archive-year time{color:var(--muted);font-size:.88rem}.archive-year a{overflow-wrap:anywhere}.toc{font-size:.88rem;line-height:1.45}.toc h2{margin:0 0 .75rem;font-size:.9rem}.toc ul{margin:0;padding:0;list-style:none}.toc ul ul{padding-left:.8rem}.toc li{margin:.4rem 0}.toc a{color:var(--muted);font-weight:500}.toc a:hover,.toc a[aria-current=location]{color:var(--link)}.toc a[aria-current=location]{font-weight:650}.katex-display{display:block;margin:1.5rem 0;padding:.85rem .25rem;overflow-x:auto;overflow-y:hidden;text-align:center}.katex-display>.katex{padding:.1em 0}.mermaid{margin:1.5rem 0;overflow-x:auto;text-align:center}.mermaid svg{max-width:100%;height:auto}.article-pagination{display:grid;grid-template-columns:repeat(2, minmax(0, 1fr));gap:1.5rem;margin-top:3.5rem;padding-top:1.25rem;border-top:1px solid var(--line)}.article-pagination-item{display:grid;gap:.2rem;min-width:0}.article-pagination-item span{color:var(--muted);font-size:.82rem;font-weight:400}.article-pagination-item strong{overflow-wrap:anywhere;color:var(--strong);font-size:.95rem}.article-pagination-next{text-align:right}.not-found{max-width:34rem}.not-found p{color:var(--muted)}.search-dialog[hidden]{display:none}.search-dialog{position:fixed;inset:0;z-index:100;padding:12vh 1rem 1rem;background:color-mix(in srgb, var(--strong) 20%, rgba(0,0,0,0));backdrop-filter:blur(3px)}.search-panel{width:min(640px,100%);max-height:min(680px,76vh);margin:0 auto;overflow:auto;border:1px solid var(--line);background:var(--paper);box-shadow:0 18px 50px rgba(0,0,0,.16)}.search-field{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.7rem;padding:0 1rem;border-bottom:1px solid var(--line)}.search-input{width:100%;border:0;padding:.9rem 0;background:rgba(0,0,0,0);outline:0}.search-close{width:2rem;height:2rem;color:var(--muted);font-size:1.3rem}.search-status{padding:.55rem 1rem;color:var(--muted);font-size:.82rem}.search-results{border-top:1px solid var(--line)}.search-results:empty{display:none}.search-result{display:grid;gap:.2rem;padding:.75rem 1rem;color:var(--strong);border-bottom:1px solid var(--line)}.search-result:hover,.search-result:focus,.search-result[aria-selected=true]{background:var(--highlight);outline:0}.search-result span{color:var(--muted);font-size:.9rem;font-weight:400;line-height:1.45}.search-result mark{padding:0;background:color-mix(in srgb, var(--accent) 25%, rgba(0,0,0,0));color:inherit}.external-link{padding:.9rem 0;border-bottom:1px solid var(--line)}.external-link h2,.external-link p{margin:0;font-size:.95rem}.external-link h2 a{overflow-wrap:anywhere}.link-status{color:var(--muted);font-weight:600}.status-ok{color:var(--accent)}.status-broken,.status-error{color:#a94b4b}@media (max-width: 1199px){.site-shell{grid-template-columns:240px minmax(0, 760px);grid-template-areas:"sidebar main" "sidebar footer";width:min(100% - 32px,1008px)}.right-sidebar{display:none}}@media (max-width: 799px){.site-shell{display:block;width:min(100% - 32px,680px)}.sidebar{position:static;display:flex;flex-flow:row wrap;align-items:center;gap:1rem;width:100%;height:auto;padding:2rem 0 1.25rem}.site-title{margin-right:auto}.site-navigation{order:3;flex-basis:100%;flex-direction:row;align-items:center;gap:1rem;overflow-x:auto;padding-bottom:1rem;border-bottom:1px solid var(--line);scrollbar-width:thin;white-space:nowrap}.site-navigation a{flex:0 0 auto}.search-open span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}main{padding-top:1rem}.site-footer{margin-top:3rem;padding-top:1.5rem}.site-footer-primary,.site-footer-secondary{align-items:flex-start;flex-direction:column;gap:1rem}.site-footer-reading{justify-content:flex-start}.site-footer-secondary{margin-top:1.25rem}h1{font-size:1.75rem}.article-body{font-size:1rem;line-height:1.72}.code-copy{opacity:1}.article-pagination{gap:1rem}.archive-year{display:block}.archive-year>h2{margin-bottom:1rem}.search-dialog{padding-top:4rem}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition-duration:0s !important}}