:root{--bg:#0f1218;--bg-raise:#151a23;--line:#222836;--line-strong:#313a4d;--text:#e7eaf2;--muted:#98a2b8;--faint:#5d677c;--accent:#6488ff;--accent-2:#9d7bfa;--accent-soft:#6488ff1f;--accent-border:#6488ff66;--accent-hover:#8aa4ff;--code-bg:#151a23;--grid-line:#ffffff06;--header-bg:#0f1218d1;--shadow-card:#05080e73;color-scheme:dark;--font-sans:"PingFang SC", "HarmonyOS Sans SC", "Helvetica Neue", "Segoe UI", ui-sans-serif, system-ui, sans-serif;--font-mono:"JetBrains Mono", "SF Mono", ui-monospace, "Cascadia Code", Menlo, Consolas, monospace;--measure:42rem}:root[data-theme=light]{--bg:#f6f7fa;--bg-raise:#fff;--line:#e4e8f0;--line-strong:#cbd3e1;--text:#1a1f2b;--muted:#4c5568;--faint:#8a93a6;--accent:#3b5bdb;--accent-2:#7048e8;--accent-soft:#3b5bdb17;--accent-border:#3b5bdb6b;--accent-hover:#2f4bc0;--code-bg:#151a23;--grid-line:#141a2806;--header-bg:#f6f7fad9;--shadow-card:#141a281a;color-scheme:light}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--bg);background-image:linear-gradient(to right, var(--grid-line) 1px, transparent 1px), linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);color:var(--text);-webkit-font-smoothing:antialiased;background-size:56px 56px,56px 56px;flex-direction:column;min-height:100dvh;font-size:16px;line-height:1.85;transition:background-color .25s,color .25s;display:flex}::selection{background:var(--accent);color:var(--bg)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.shell{width:min(100% - 3rem,64rem);margin-inline:auto}main.shell{flex:1;padding-block:4rem 6rem}.site-header{border-bottom:1px solid var(--line);background:var(--header-bg);backdrop-filter:blur(10px);z-index:10;position:sticky;top:0}.site-header .shell{justify-content:space-between;align-items:center;gap:1.5rem;padding-block:1.05rem;display:flex}.wordmark{font-family:var(--font-mono);letter-spacing:.08em;color:var(--muted);align-items:center;gap:.55rem;font-size:.85rem;display:flex}.wordmark .prompt{color:var(--accent)}.wordmark .cursor{background:var(--accent);width:.55em;height:1.15em;animation:1.1s step-end infinite blink;display:inline-block;transform:translateY(.18em)}@keyframes blink{50%{opacity:0}}.wordmark:hover{color:var(--text)}.header-right{align-items:center;gap:1.6rem;display:flex}.site-nav{font-family:var(--font-mono);gap:1.9rem;font-size:.82rem;display:flex}.site-nav a{color:var(--muted);padding-block:.2rem;transition:color .15s}.site-nav a:before{content:"/";color:var(--faint);margin-right:.4em}.site-nav a:hover{color:var(--text)}.site-nav a[aria-current=page],.site-nav a[aria-current=page]:before{color:var(--accent)}.header-controls{align-items:center;gap:.7rem;display:flex}.theme-toggle{border:1px solid var(--line-strong);color:var(--muted);cursor:pointer;background:0 0;border-radius:50%;place-items:center;width:1.9rem;height:1.9rem;font-size:.8rem;line-height:1;transition:color .15s,border-color .15s;display:grid}.theme-toggle:hover{color:var(--accent);border-color:var(--accent)}.theme-toggle .sun{display:block}.theme-toggle .moon,:root[data-theme=light] .theme-toggle .sun{display:none}:root[data-theme=light] .theme-toggle .moon{display:block}.lang-link{font-family:var(--font-mono);color:var(--muted);border:1px solid var(--line-strong);border-radius:999px;padding:.18rem .55rem;font-size:.75rem;transition:color .15s,border-color .15s}.lang-link:hover{color:var(--accent);border-color:var(--accent)}.site-footer{border-top:1px solid var(--line);font-family:var(--font-mono);color:var(--faint);padding-block:2.2rem;font-size:.78rem}.site-footer .shell{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.8rem;display:flex}.site-footer a{color:var(--muted);transition:color .15s}.site-footer a:hover{color:var(--accent)}.section-head{align-items:baseline;gap:1rem;margin-bottom:2.2rem;display:flex}.section-head .num{font-family:var(--font-mono);color:var(--accent);letter-spacing:.05em;font-size:.82rem}.section-head h2{letter-spacing:.16em;font-size:1.3rem;font-weight:600}.section-head:after{content:"";border-top:1px solid var(--line);flex:1;transform:translateY(-.3rem)}.page-head{margin-bottom:3rem}.page-head h1{letter-spacing:.14em;margin-bottom:.8rem;font-size:2rem}.page-head p{color:var(--muted);max-width:var(--measure)}.page-head a{color:var(--accent);border-bottom:1px solid var(--accent-border)}.rise{animation:none}@media (prefers-reduced-motion:reduce){.wordmark .cursor{animation:none}html{scroll-behavior:auto}}@media (width<=640px){.site-nav{gap:1rem}.wordmark .host{display:none}.header-right{gap:1rem}}