:root{font-size:62.5%;box-sizing:border-box;--color-bg:#fbfbf8;--color-text:#23262d;--color-link:#0b5cad;--color-link-soft:#eaf3ff;--color-muted:#5b6472;--color-panel:#ffffff;--color-panel-soft:#f4f6f4;--color-border:#d7dce2;--color-accent:#b45309;--color-note-bg:#eefaf7;--color-note-border:#0f766e;--color-code-bg:#151922;--color-code-toolbar-bg:#202632;--color-code-line:#7f8a9b;--color-code-line-border:rgba(255,255,255,0.12);--color-code-line-target:rgba(180,83,9,0.22);--color-toggle-bg:#ffffff;--color-toggle-border:#cbd5e1;--color-toggle-shadow:rgba(15,23,42,0.12);--theme-transition:color 180ms ease,background-color 180ms ease,border-color 180ms ease,box-shadow 180ms ease,outline-color 180ms ease}*,*::before,*::after{box-sizing:inherit}:root[data-theme="dark"]{color-scheme:dark;--color-bg:#111318;--color-text:#e8e3d8;--color-link:#8bc5ff;--color-link-soft:#172435;--color-muted:#a5adba;--color-panel:#1a1d24;--color-panel-soft:#151820;--color-border:#343a46;--color-accent:#f0b35c;--color-note-bg:#112522;--color-note-border:#39b8a5;--color-code-bg:#0e1118;--color-code-toolbar-bg:#171c26;--color-code-line:#7f8ea5;--color-code-line-border:rgba(255,255,255,0.11);--color-code-line-target:rgba(240,179,92,0.18);--color-toggle-bg:#1f2430;--color-toggle-border:#465062;--color-toggle-shadow:rgba(0,0,0,0.35)}html,body{min-height:100vh}body{margin:0;color:var(--color-text);background:var(--color-bg);font:1.8rem/1.72 Tahoma,Arial,"Noto Sans CJK SC","Microsoft YaHei",sans-serif;letter-spacing:0;scroll-behavior:smooth;transition:var(--theme-transition)}body *,body *::before,body *::after{transition:var(--theme-transition)}a{color:var(--color-link);text-decoration-thickness:0.08em;text-underline-offset:0.18em}a:hover{color:var(--color-accent)}img{max-width:100%;height:auto}h1,h2,h3,h4{margin:0 0 1.4rem;color:var(--color-text);font-family:"Palatino Linotype","Book Antiqua",Palatino,"Noto Serif CJK SC",serif;line-height:1.18}h1{font-size:4.4rem}h2{font-size:2.9rem}h3{font-size:2.3rem}p,ul,ol,blockquote,table,pre,figure{margin:0 0 1.6rem}ul,ol{padding-left:2.4rem}li+li{margin-top:0.6rem}small{color:var(--color-muted);font-size:1.5rem}.site-header{display:flex;flex-wrap:wrap;align-items:center;gap:2rem;width:min(100% - 4rem,104rem);margin:0 auto;padding:1.4rem 0;border-bottom:1px solid var(--color-border);background:var(--color-bg)}.site-brand{display:inline-flex;flex-direction:column;flex:0 0 auto;color:var(--color-text);text-decoration:none}.site-brand__title{font:700 1.8rem/1.2 "Palatino Linotype","Book Antiqua",Palatino,serif}.site-brand__subtitle{color:var(--color-muted);font-size:1.2rem}.site-nav{display:flex;flex:1 1 auto;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:0.8rem 1.2rem}.site-nav a{color:var(--color-muted);font-size:1.5rem;font-weight:700;text-decoration:none}.site-nav a:hover{color:var(--color-link)}.site-actions{display:inline-flex;flex:0 0 auto;align-items:center;gap:0.8rem;margin-left:auto}.language-toggle,.theme-toggle{display:inline-flex;align-items:center;flex:0 0 auto;min-height:3.8rem;border:1px solid var(--color-toggle-border);border-radius:999px;color:var(--color-text);background:var(--color-toggle-bg);box-shadow:0 0.8rem 2rem var(--color-toggle-shadow)}.language-toggle{overflow:hidden}.language-toggle button{min-height:3.6rem;padding:0.7rem 1rem;border:0;color:var(--color-muted);background:transparent;cursor:pointer;font:700 1.4rem/1 Tahoma,Arial,sans-serif}.language-toggle button+button{border-left:1px solid var(--color-toggle-border)}.language-toggle button:hover,.language-toggle button:focus{color:var(--color-link)}.language-toggle button.is-current{color:var(--color-text);background:var(--color-link-soft)}.theme-toggle{gap:0.8rem;padding:0.7rem 1rem;cursor:pointer;font:700 1.4rem/1 Tahoma,Arial,sans-serif}.language-toggle:hover,.theme-toggle:hover{border-color:var(--color-link)}.language-toggle:focus-within,.theme-toggle:focus{outline:0.3rem solid var(--color-link);outline-offset:0.3rem}.theme-toggle__mark{display:inline-block;width:1.8rem;height:1.8rem;border:0.2rem solid currentColor;border-radius:50%;background:linear-gradient(90deg,currentColor 0 50%,transparent 50% 100%)}.layout-main{width:min(100% - 4rem,82rem);margin:0 auto}.home{padding:5rem 0 7rem}.home-intro,.page-header,.post-header{padding:4rem 0 3rem}.home-intro__eyebrow,.post-date{margin-bottom:1rem;color:var(--color-accent);font-size:1.4rem;font-weight:800;text-transform:uppercase}.home-intro p{max-width:64rem;color:var(--color-muted);font-size:2rem}.home-intro__links{display:flex;flex-wrap:wrap;gap:1rem;margin-top:2.4rem}.home-intro__links a{display:inline-flex;min-height:3.8rem;align-items:center;padding:0.6rem 1.2rem;border:1px solid var(--color-border);border-radius:8px;background:var(--color-panel);font-size:1.5rem;font-weight:700;text-decoration:none}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:1.6rem;margin-bottom:1.2rem}.section-heading a{flex:0 0 auto;font-size:1.5rem;font-weight:700}.post,.page{padding-bottom:6rem}.post-date span{margin-left:0.8rem;color:var(--color-muted);font-weight:600;text-transform:none}.post-meta,.post-list__meta{display:flex;flex-wrap:wrap;gap:0.6rem 1.2rem;color:var(--color-muted);font-size:1.4rem}.post-list__meta span:empty,.post-meta span:empty{display:none}.post-meta{margin-top:1rem}.post-meta a,.post-list__meta a{color:var(--color-muted)}.language-version[hidden]{display:none}.post-content>*+*{margin-top:1.5rem}.post-content h2,.post-content h3{margin-top:3.4rem}.post-content blockquote{border-left:0.4rem solid var(--color-note-border);padding:1rem 1.4rem;color:var(--color-text);background:var(--color-note-bg)}.post-content blockquote>:first-child{margin-top:0}.post-content blockquote>:last-child{margin-bottom:0}.post-content table{display:block;width:100%;overflow-x:auto;border-collapse:collapse}.post-content th,.post-content td{padding:0.8rem 1rem;border-bottom:1px solid var(--color-border);text-align:left}.post-list{margin:0;padding:0;list-style:none}.post-list li{padding:1.8rem 0;border-top:1px solid var(--color-border)}.post-list li:last-child{border-bottom:1px solid var(--color-border)}.post-list__title{display:inline-block;margin-bottom:0.6rem;color:var(--color-text);font:700 2rem/1.35 "Palatino Linotype","Book 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var(--color-link);outline-offset:0.2rem}.code-copy-button.is-copied{border-color:var(--color-note-border);color:#d8fff8}.has-line-numbers code>span[id]:target{background:var(--color-code-line-target)}.code-line-link{display:inline-block;width:4rem;margin-right:0.9rem;padding-right:0.8rem;border-right:1px solid var(--color-code-line-border);color:var(--color-code-line);text-align:right;text-decoration:none;user-select:none}.code-line-link:hover,.code-line-link:focus{color:var(--color-link)}.code-line-link:focus{outline:0.2rem solid var(--color-link);outline-offset:-0.2rem}mjx-container[display="true"]{overflow-x:auto;overflow-y:hidden;padding:0.4rem 0}pre.mermaid{overflow:visible;border:none;background:transparent;line-height:inherit;white-space:normal}.mermaid .katex{color:inherit;font-size:1em}.mermaid-container{margin:2rem 0;text-align:center}.mermaid svg,.mermaid svg *{transition:none!important}.geogebra-panel{margin:2.4rem 0}.geogebra-panel figcaption{margin-top:0.8rem;color:var(--color-muted);font-size:1.4rem}.geogebra-applet{position:relative;min-height:32rem;overflow:hidden;border:1px solid var(--color-border);border-radius:8px;background:var(--color-panel)}.geogebra-applet:not(.is-ready)::before{content:"GeoGebra loading...";display:grid;position:absolute;inset:0;z-index:1;place-items:center;color:var(--color-muted);background:var(--color-panel);font-size:1.5rem}.comments{width:min(100% - 4rem,82rem);margin:0 auto 6rem;padding-top:3rem;border-top:1px solid var(--color-border)}.giscus,.giscus-frame{width:100%;border:0}.site-footer{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1.2rem;width:min(100% - 4rem,104rem);margin:0 auto;padding:3rem 0 4rem;border-top:1px solid var(--color-border);color:var(--color-muted);font-size:1.4rem}.site-footer strong{display:block;color:var(--color-text)}.site-footer__links{display:flex;gap:1rem}@media (max-width:760px){h1{font-size:3.4rem}h2{font-size:2.5rem}.site-header{align-items:flex-start;width:min(100% - 2.4rem,104rem);gap:1.2rem}.site-nav{order:3;width:100%;justify-content:flex-start}.site-actions{margin-left:auto}.layout-main,.comments{width:min(100% - 2.4rem,82rem)}.home,.post,.page{padding-bottom:4rem}.home-intro,.page-header,.post-header{padding:3rem 0 2rem}.home-intro p{font-size:1.8rem}.geogebra-applet,.geogebra-applet:not(.is-ready)::before{min-height:28rem}.code-block-toolbar{padding-left:1rem}.code-line-link{width:3.4rem;margin-right:0.8rem;padding-right:0.8rem}}