:root{--bg-color:#f7f8fa;--surface-color:#fff;--surface-subtle:#f2f4f7;--text-primary:#0f1115;--text-secondary:#5b6370;--text-tertiary:#8a919e;--border-color:#e6e8ec;--border-strong:#d5d9e0;--accent-color:#007aff;--accent-hover:#0a6ae6;--accent-soft:#007aff14;--gemini-gradient:linear-gradient(135deg, #4285f4 0%, #9b72cb 52%, #d96570 100%);--sidebar-width:300px;--content-max-width:780px;--header-height:56px;--r-sm:5px;--r-md:6px;--r-lg:8px;--r-xl:10px;--shadow-sm:0 1px 2px #0f11150d;--shadow-md:0 6px 24px #0f11151a;--shadow-lg:0 12px 40px #0f111524;--code-bg-inline:#f2f4f7;--code-color-inline:#b3204e;--code-border-inline:#e3e6ea;--code-bg-block:#fafbfc;--code-color-block:#0f1115;--code-border-block:#e6e8ec;--code-head-bg:#f2f4f7;--quote-bg:#f7f8fa;--quote-color:#414855;--quote-border:#e6e8ec;--topbar-bg:#ffffffd1}[data-theme=dark]{--bg-color:#0b0d10;--surface-color:#14171c;--surface-subtle:#1a1e24;--text-primary:#eef1f5;--text-secondary:#9aa2af;--text-tertiary:#6b7280;--border-color:#262b33;--border-strong:#333944;--accent-color:#4c9dff;--accent-hover:#6badff;--accent-soft:#4c9dff1f;--shadow-sm:0 1px 2px #0006;--shadow-md:0 6px 24px #00000080;--shadow-lg:0 12px 40px #0009;--code-bg-inline:#1a1e24;--code-color-inline:#7fd0ff;--code-border-inline:#262b33;--code-bg-block:#0f1216;--code-color-block:#eef1f5;--code-border-block:#262b33;--code-head-bg:#171b21;--quote-bg:#14171c;--quote-color:#c3c9d2;--quote-border:#262b33;--topbar-bg:#0b0d10d1}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background-color:var(--bg-color);color:var(--text-primary);font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,system-ui,Segoe UI,Roboto,sans-serif;line-height:1.6;transition:background-color .25s,color .25s}::selection{background:var(--accent-soft);color:var(--accent-hover)}*{scrollbar-width:thin;scrollbar-color:var(--border-strong) transparent}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border-strong);border:3px solid var(--bg-color);border-radius:20px}::-webkit-scrollbar-track{background:0 0}code,pre{font-family:JetBrains Mono,ui-monospace,SFMono-Regular,Courier New,monospace}h1,h2,h3,h4,h5,h6{color:var(--text-primary);letter-spacing:-.014em;margin-top:2.75rem;margin-bottom:1rem;scroll-margin-top:5rem;font-weight:650;line-height:1.28}h1{letter-spacing:-.03em;background:linear-gradient(180deg, var(--text-primary) 60%, var(--text-secondary) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-top:.5rem;font-size:clamp(2.1rem,4.2vw,2.8rem);font-weight:780;line-height:1.12}h2{border-bottom:1px solid var(--border-color);padding-bottom:.55rem;scroll-margin-top:4.5rem;font-size:1.62rem}h3{font-size:1.28rem;font-weight:640}.heading-anchor{color:var(--text-tertiary);opacity:0;vertical-align:middle;align-items:center;margin-left:.5rem;transition:opacity .15s,transform .15s,color .15s;display:inline-flex;transform:translate(-4px)}h2:hover .heading-anchor,h3:hover .heading-anchor{opacity:1;transform:none}.heading-anchor:hover{color:var(--accent-color)}p{color:var(--text-secondary);margin-bottom:1.2rem;font-size:1.03rem;line-height:1.78}.markdown-body>p:first-of-type{color:var(--text-secondary);border-bottom:1px solid var(--border-color);margin-bottom:1.75rem;padding-bottom:1.5rem;font-size:1.2rem;font-weight:430;line-height:1.65}.markdown-body strong{color:var(--text-primary);font-weight:640}.markdown-body hr{border:none;border-top:1px solid var(--border-color);margin:2.75rem 0}a{color:var(--accent-color);text-decoration:none;transition:color .15s}a:hover{color:var(--accent-hover);text-underline-offset:3px;text-decoration:underline}ul,ol{margin:0 0 1.2rem 1.35rem}li{color:var(--text-secondary);margin-bottom:.5rem;line-height:1.7}li::marker{color:var(--text-tertiary)}.app-container{min-height:100vh;display:flex}.reading-progress{background:var(--gemini-gradient);z-index:200;border-radius:0 2px 2px 0;height:3px;transition:width 80ms linear;position:fixed;top:0;left:0}.sidebar{width:var(--sidebar-width);background-color:var(--bg-color);border-right:1px solid var(--border-color);z-index:60;flex-direction:column;height:100vh;padding:1.5rem 1.1rem;transition:transform .3s,background-color .25s;display:flex;position:sticky;top:0;overflow-y:auto}.sidebar-header{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:1rem;padding-bottom:1.1rem;display:flex}.sidebar-brand{align-items:center;gap:.65rem;min-width:0;display:flex}.brand-mark{border-radius:var(--r-md);background:var(--gemini-gradient);flex-shrink:0;width:30px;height:30px;box-shadow:0 2px 8px #4285f459}.brand-text{flex-direction:column;min-width:0;display:flex}.brand-title{color:var(--text-primary);letter-spacing:-.01em;font-size:.95rem;font-weight:700;line-height:1.2}.brand-sub{color:var(--text-tertiary);letter-spacing:.01em;font-size:.72rem;font-weight:500}.sidebar-meta{flex-wrap:wrap;gap:.4rem;margin-bottom:1rem;display:flex}.meta-chip{color:var(--text-secondary);background:var(--surface-subtle);border:1px solid var(--border-color);border-radius:var(--r-sm);align-items:center;gap:.3rem;padding:.22rem .5rem;font-size:.74rem;font-weight:550;display:inline-flex}.meta-chip.subtle{color:var(--text-tertiary);background:0 0;border-color:#0000}.toc-nav{flex:1}.toc-list{list-style:none}.toc-item{margin-bottom:1px}.toc-link{color:var(--text-secondary);border-radius:var(--r-md);border-left:2px solid #0000;padding:.44rem .7rem;font-size:.89rem;line-height:1.45;text-decoration:none;transition:background-color .15s,color .15s,border-color .15s;display:block}.toc-link:hover{background-color:var(--surface-subtle);color:var(--text-primary);text-decoration:none}.toc-link.active{background-color:var(--accent-soft);color:var(--accent-color);border-left:2px solid var(--accent-color);border-radius:0 var(--r-md) var(--r-md) 0;font-weight:600}.toc-item.depth-2 .toc-link{color:var(--text-primary);font-weight:600}.toc-item.depth-2{margin-top:.35rem}.toc-item.depth-3{padding-left:.8rem}.toc-item.depth-3 .toc-link{color:var(--text-tertiary);padding:.3rem .7rem;font-size:.82rem;font-weight:500}.toc-item.depth-3 .toc-link:hover{color:var(--text-primary)}.toc-item.depth-3 .toc-link.active{color:var(--accent-color)}.sidebar-footer{border-top:1px solid var(--border-color);color:var(--text-tertiary);margin-top:1rem;padding-top:1rem;font-size:.76rem}.sidebar-footer strong{color:var(--text-secondary);font-weight:650}.sidebar-backdrop{z-index:55;opacity:0;background:#0f111573;transition:opacity .25s;display:none;position:fixed;inset:0}.main-content{background-color:var(--surface-color);border-left:1px solid var(--border-color);flex:1;min-width:0;position:relative}.doc-topbar{z-index:40;height:var(--header-height);background:var(--topbar-bg);-webkit-backdrop-filter:saturate(160%)blur(10px);backdrop-filter:saturate(160%)blur(10px);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;gap:1rem;padding:0 3rem;display:flex;position:sticky;top:0}.crumbs{align-items:center;gap:.5rem;min-width:0;font-size:.86rem;display:flex}.crumbs a{color:var(--text-secondary)}.crumbs a:hover{color:var(--accent-color);text-decoration:none}.crumb-sep{color:var(--text-tertiary)}.crumb-cur{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.topbar-meta{align-items:center;gap:.6rem;display:flex}.content-wrapper{max-width:var(--content-max-width);margin:0 auto;padding:3.25rem 3rem 5rem;position:relative}.markdown-body{color:var(--text-primary);font-size:1.03rem;animation:.4s both fadeUp}@keyframes fadeUp{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.markdown-body blockquote{border:1px solid var(--quote-border);border-left:3px solid var(--accent-color);background:var(--quote-bg);border-radius:0 var(--r-lg) var(--r-lg) 0;margin:0 0 1.35rem;padding:.9rem 1.1rem;transition:background-color .25s,border-color .25s}.markdown-body blockquote,.markdown-body blockquote *{color:var(--quote-color)!important}.markdown-body blockquote p:last-child{margin-bottom:0}.markdown-body .code-card{border:1px solid var(--code-border-block);border-radius:var(--r-lg);background:var(--code-bg-block);box-shadow:var(--shadow-sm);margin-bottom:1.6rem;overflow:hidden}.code-card-head{background:var(--code-head-bg);border-bottom:1px solid var(--code-border-block);justify-content:space-between;align-items:center;padding:.4rem .6rem .4rem .9rem;display:flex}.code-lang{letter-spacing:.03em;text-transform:uppercase;color:var(--text-tertiary);font-family:JetBrains Mono,ui-monospace,monospace;font-size:.72rem;font-weight:600}.code-copy{color:var(--text-secondary);background:var(--surface-color);border:1px solid var(--border-color);border-radius:var(--r-sm);cursor:pointer;align-items:center;gap:.35rem;padding:.28rem .55rem;font-size:.74rem;font-weight:550;transition:color .15s,border-color .15s,background .15s;display:inline-flex}.code-copy:hover{color:var(--accent-color);border-color:var(--accent-color);background:var(--accent-soft)}.markdown-body .code-card pre,.markdown-body .code-card div[class*=language-]{background:0 0!important;border:none!important;border-radius:0!important;margin:0!important}.markdown-body>pre,.code-fallback{border-radius:var(--r-lg);border:1px solid var(--code-border-block);margin-bottom:1.6rem;padding:1.15rem 1.25rem;font-size:.875rem;line-height:1.6;overflow-x:auto;background-color:var(--code-bg-block)!important;color:var(--code-color-block)!important}.markdown-body code:not(pre code):not(.code-card code){background-color:var(--code-bg-inline);border-radius:var(--r-sm);color:var(--code-color-inline);border:1px solid var(--code-border-inline);padding:.15em .4em;font-size:.86em;transition:background-color .25s,border-color .25s,color .25s}.markdown-body table{border-collapse:separate;border-spacing:0;border:1px solid var(--border-color);border-radius:var(--r-lg);width:100%;box-shadow:var(--shadow-sm);margin-bottom:1.6rem;font-size:.95rem;overflow:hidden}.markdown-body th,.markdown-body td{border-bottom:1px solid var(--border-color);text-align:left;padding:.7rem 1rem}.markdown-body th{background-color:var(--surface-subtle);color:var(--text-primary);text-transform:uppercase;letter-spacing:.03em;font-size:.82rem;font-weight:640}.markdown-body tbody tr:nth-child(2n){background-color:var(--surface-subtle)}.markdown-body tbody tr:last-child td{border-bottom:none}.markdown-body td{color:var(--text-secondary)}.markdown-body img{border-radius:var(--r-lg);border:1px solid var(--border-color);max-width:100%;box-shadow:var(--shadow-md);margin:.5rem 0 1.6rem;display:block}.doc-license{border-top:1px solid var(--border-color);color:var(--text-tertiary);margin-top:3.5rem;padding-top:1.75rem;font-size:.86rem;line-height:1.7}.doc-license .license-badge{color:var(--text-secondary);background:var(--surface-subtle);border:1px solid var(--border-color);border-radius:var(--r-sm);font-variant-numeric:tabular-nums;align-items:center;gap:.4rem;margin-bottom:.9rem;padding:.3rem .65rem;font-weight:650;display:inline-flex}.doc-license p{color:var(--text-tertiary);margin-bottom:.5rem;font-size:.86rem;line-height:1.7}.doc-license strong{color:var(--text-secondary)}.theme-toggle{border:1px solid var(--border-color);color:var(--text-secondary);cursor:pointer;border-radius:var(--r-md);background:0 0;flex-shrink:0;justify-content:center;align-items:center;padding:.4rem;transition:background-color .15s,color .15s,border-color .15s;display:flex}.theme-toggle:hover{background-color:var(--surface-subtle);color:var(--accent-color);border-color:var(--border-strong)}.back-to-top{border-radius:var(--r-xl);background:var(--surface-color);border:1px solid var(--border-strong);width:44px;height:44px;color:var(--text-secondary);cursor:pointer;box-shadow:var(--shadow-md);opacity:0;pointer-events:none;z-index:90;justify-content:center;align-items:center;transition:opacity .2s,transform .2s,color .15s,border-color .15s;display:flex;position:fixed;bottom:22px;right:22px;transform:translateY(12px)}.back-to-top.show{opacity:1;pointer-events:auto;transform:none}.back-to-top:hover{color:var(--accent-color);border-color:var(--accent-color)}.mobile-menu-btn{background:var(--gemini-gradient);border-radius:var(--r-xl);width:52px;height:52px;box-shadow:var(--shadow-lg);z-index:100;cursor:pointer;color:#fff;border:none;justify-content:center;align-items:center;transition:transform .15s;display:none;position:fixed;bottom:22px;left:22px}.mobile-menu-btn:active{transform:scale(.94)}@media (width<=900px){.doc-topbar{padding:0 1.4rem}.content-wrapper{padding:2.25rem 1.4rem 5rem}}@media (width<=768px){.app-container{flex-direction:column}.sidebar{width:88%;max-width:320px;position:fixed;transform:translate(-100%)}.sidebar.open{box-shadow:var(--shadow-lg);transform:translate(0)}.sidebar-backdrop.show{opacity:1;display:block}.main-content{border-left:none}.desktop-only{display:none}.doc-topbar{padding:0 1.2rem 0 4.5rem}.mobile-menu-btn{display:flex}h1{font-size:2rem}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}