:root{--text-h1:36px;--text-h2:26px;--text-h3:20px;--text-h4:18px;--text-body-size:17px;--text-body-mobile:16px;--text-lead:19px;--text-label:14px;--text-meta:13px;--text-caption:12px;--text-code-inline:15px;--text-code-block:14px;--leading-tight:1.3;--leading-snug:1.5;--leading-normal:1.7;--leading-relaxed:1.85;--leading-code:1.65;--weight-regular:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Helvetica Neue", Helvetica, Arial, sans-serif;--font-mono:"JetBrains Mono", "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;--bg-page:#ffffff;--bg-subtle:#f9fafb;--bg-card:#ffffff;--bg-elevated:#f3f4f6;--bg-code:#1e293b;--bg-code-inline:#f1f5f9;--text-primary:#0f172a;--text-body:#334155;--text-muted:#64748b;--text-faint:#94a3b8;--code-text:#e2e8f0;--code-comment:#94a3b8;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-subtle:#eff6ff;--border-subtle:#f1f5f9;--border-default:#e2e8f0;--border-strong:#cbd5e1;--status-success:#10b981;--status-info:#3b82f6;--status-warning:#f59e0b;--status-danger:#ef4444;--shadow-sm:0 1px 2px 0 rgba(0, 0, 0, 0.05);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1)}@media(max-width:640px){:root{--text-h1:28px;--text-h2:22px;--text-h3:18px;--text-h4:16px;--text-lead:17px;--text-body-size:var(--text-body-mobile)}}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-sans);font-size:var(--text-body-size);line-height:var(--leading-relaxed);color:var(--text-body);background-color:var(--bg-page);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}a{color:var(--accent);text-decoration:none;transition:color .15s ease}a:hover{color:var(--accent-hover)}img,svg{max-width:100%;height:auto;display:block}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.25rem}.reading-progress-bar{position:fixed;top:0;left:0;height:3px;background:var(--accent);width:0%;z-index:1000;transition:width .1s ease}.site-header{position:sticky;top:0;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--border-default);z-index:100;transition:box-shadow .2s ease}.site-header.scrolled{box-shadow:var(--shadow-sm)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1.5rem}.site-brand{display:flex;align-items:center;gap:.6rem;font-size:var(--text-h4);font-weight:var(--weight-bold);color:var(--text-primary);text-decoration:none;white-space:nowrap}.site-brand .brand-badge{font-family:var(--font-mono);font-size:var(--text-caption);font-weight:var(--weight-medium);padding:.15em .45em;background:var(--accent-subtle);color:var(--accent);border-radius:4px;border:1px solid rgba(37,99,235,.2)}.site-nav{display:flex;align-items:center;gap:1.25rem;list-style:none}.nav-link{font-size:var(--text-label);font-weight:var(--weight-medium);color:var(--text-body);text-decoration:none;padding:.4rem .6rem;border-radius:6px;transition:all .15s ease;white-space:nowrap}.nav-link:hover,.nav-link.active{color:var(--accent);background:var(--bg-subtle)}.header-actions{display:flex;align-items:center;gap:.75rem}.search-trigger-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.4rem .8rem;font-family:var(--font-sans);font-size:var(--text-label);color:var(--text-muted);background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:6px;cursor:pointer;transition:all .15s ease}.search-trigger-btn:hover{border-color:var(--border-strong);color:var(--text-primary)}.search-trigger-btn kbd{font-family:var(--font-mono);font-size:var(--text-caption);background:var(--bg-page);padding:.1em .35em;border:1px solid var(--border-default);border-radius:3px}.mobile-menu-toggle{display:none;background:0 0;border:none;padding:.4rem;color:var(--text-primary);cursor:pointer}.main-wrapper{padding:2rem 0 4rem;min-height:calc(100vh - 64px - 260px)}.content-with-sidebar{display:grid;grid-template-columns:minmax(0,1fr)260px;gap:2.5rem;align-items:start}.content-sidebar{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow-y:auto;padding-left:.5rem}.breadcrumbs-nav{margin-bottom:1.5rem;font-size:var(--text-meta);color:var(--text-muted)}.breadcrumbs-list{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;list-style:none}.breadcrumbs-item a{color:var(--text-muted)}.breadcrumbs-item a:hover{color:var(--accent)}.breadcrumbs-separator{color:var(--text-faint);font-family:var(--font-mono)}.toc-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:8px;padding:1.2rem}.toc-title{font-size:var(--text-label);font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:.8rem;display:flex;align-items:center;gap:.4rem}.toc-list{list-style:none;font-size:var(--text-meta);line-height:var(--leading-normal)}.toc-list li{margin-bottom:.45rem}.toc-list a{color:var(--text-muted);display:block;padding:.2rem 0;border-left:2px solid transparent;padding-left:.6rem;margin-left:-.6rem;transition:all .15s ease}.toc-list a:hover,.toc-list a.active{color:var(--accent);border-left-color:var(--accent);font-weight:var(--weight-medium)}.toc-list .toc-sublist{list-style:none;padding-left:.8rem;margin-top:.3rem}.site-footer{background:var(--bg-subtle);border-top:1px solid var(--border-default);padding:3rem 0 2rem;font-size:var(--text-label);color:var(--text-muted)}.footer-top{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:2rem;margin-bottom:2.5rem}.footer-brand-title{font-size:var(--text-h4);font-weight:var(--weight-bold);color:var(--text-primary);margin-bottom:.6rem}.footer-brand-desc{line-height:var(--leading-normal);color:var(--text-muted);margin-bottom:1rem}.footer-sister-notice{background:var(--bg-page);border:1px solid var(--border-default);border-radius:6px;padding:.8rem;font-size:var(--text-meta)}.footer-sister-notice a{font-weight:var(--weight-medium)}.footer-col-title{font-size:var(--text-label);font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:.8rem}.footer-links{list-style:none;display:flex;flex-direction:column;gap:.5rem}.footer-links a{color:var(--text-muted)}.footer-links a:hover{color:var(--accent)}.footer-bottom{border-top:1px solid var(--border-default);padding-top:1.5rem;display:flex;flex-direction:column;align-items:center;gap:.6rem;text-align:center;font-size:var(--text-caption);color:var(--text-muted)}.footer-legal-bar{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}@media(max-width:960px){.content-with-sidebar{grid-template-columns:minmax(0,1fr)}.content-sidebar{display:none}.footer-top{grid-template-columns:1fr}}@media(max-width:768px){.site-nav{display:none}.mobile-menu-toggle{display:block}.site-nav.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--bg-page);border-bottom:1px solid var(--border-default);padding:1rem 1.25rem;box-shadow:var(--shadow-md)}}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem;margin:1.8rem 0}.article-card{background:var(--bg-card);border:1px solid var(--border-default);border-radius:8px;padding:1.4rem;display:flex;flex-direction:column;transition:all .2s ease;text-decoration:none}.article-card:hover{border-color:var(--accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}.article-card-title{font-size:var(--text-h4);font-weight:var(--weight-semibold);line-height:var(--leading-snug);color:var(--text-primary);margin-bottom:.6rem}.article-card:hover .article-card-title{color:var(--accent)}.article-card-summary{font-size:var(--text-label);line-height:var(--leading-normal);color:var(--text-muted);margin-bottom:1rem;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.article-card-meta{display:flex;align-items:center;justify-content:space-between;font-size:var(--text-meta);color:var(--text-faint);padding-top:.8rem;border-top:1px solid var(--border-subtle)}.callout{border-radius:6px;padding:1rem 1.25rem;margin:1.6em 0;border-left:4px solid;font-size:var(--text-body-size);line-height:var(--leading-normal)}.callout-header{display:flex;align-items:center;gap:.4rem;font-weight:var(--weight-semibold);margin-bottom:.5rem;font-size:var(--text-label)}.callout-note{background:#f8fafc;border-left-color:var(--text-muted);color:var(--text-body)}.callout-note .callout-header{color:var(--text-primary)}.callout-tip{background:#f0fdf4;border-left-color:var(--status-success);color:#14532d}.callout-tip .callout-header{color:#166534}.callout-warning{background:#fffbeb;border-left-color:var(--status-warning);color:#78350f}.callout-warning .callout-header{color:#92400e}.callout-danger{background:#fef2f2;border-left-color:var(--status-danger);color:#7f1d1d}.callout-danger .callout-header{color:#991b1b}.sister-site-cta{background:#f8fafc;border:1px solid var(--border-default);border-radius:8px;padding:1.5rem;margin:2.5em 0;position:relative}.sister-site-cta p{font-size:var(--text-body-size);color:var(--text-body);margin-bottom:.8rem!important}.sister-site-cta a{display:inline-flex;align-items:center;gap:.4rem;background:var(--accent);color:#fff!important;font-weight:var(--weight-medium);font-size:var(--text-label);padding:.6rem 1.2rem;border-radius:6px;text-decoration:none!important;transition:background .15s ease}.sister-site-cta a:hover{background:var(--accent-hover)}.sister-site-cta .disclosure{display:block;margin-top:.6rem;font-size:var(--text-caption);color:var(--text-muted)}.def-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:6px;padding:1.2rem;margin:1.6em 0}.def-term{font-family:var(--font-mono);font-weight:var(--weight-bold);font-size:var(--text-h4);color:var(--text-primary);margin-bottom:.4rem}.compare-container{overflow-x:auto;margin:1.8em 0;border-radius:8px;border:1px solid var(--border-default);-webkit-overflow-scrolling:touch}.compare-table{width:100%;border-collapse:collapse;font-size:var(--text-label);background:var(--bg-page)}.compare-table th{background:var(--bg-subtle);font-weight:var(--weight-semibold);padding:.8rem 1rem;border-bottom:2px solid var(--border-default);text-align:left;white-space:nowrap}.compare-table td{padding:.8rem 1rem;border-bottom:1px solid var(--border-subtle);vertical-align:top}.apiparams-table{width:100%;border-collapse:collapse;font-size:var(--text-label);margin:1.5em 0;border:1px solid var(--border-default)}.apiparams-table th{background:var(--bg-subtle);padding:.6rem .8rem;border-bottom:1px solid var(--border-default);font-weight:var(--weight-semibold);text-align:left}.apiparams-table td{padding:.6rem .8rem;border-bottom:1px solid var(--border-subtle)}.apiparams-param{font-family:var(--font-mono);font-weight:var(--weight-semibold);color:var(--text-primary)}.apiparams-type{font-family:var(--font-mono);font-size:var(--text-caption);color:var(--accent)}.pagination{display:flex;align-items:center;justify-content:center;gap:.5rem;margin:2.5rem 0 1rem;list-style:none}.page-item a,.page-item span{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 .5rem;font-size:var(--text-label);border:1px solid var(--border-default);border-radius:6px;color:var(--text-body);text-decoration:none}.page-item.active span{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:var(--weight-semibold)}.page-item a:hover{border-color:var(--accent);color:var(--accent)}.search-modal-backdrop{display:none;position:fixed;inset:0;background:rgba(15,23,42,.6);backdrop-filter:blur(4px);z-index:200;padding:4rem 1rem 1rem;overflow-y:auto}.search-modal-backdrop.open{display:flex;justify-content:center;align-items:flex-start}.search-modal-container{background:var(--bg-page);border-radius:12px;width:100%;max-width:680px;padding:1.5rem;box-shadow:var(--shadow-lg);border:1px solid var(--border-default)}.article-header{margin-bottom:2.2rem;padding-bottom:1.5rem;border-bottom:1px solid var(--border-default)}.article-title{font-size:var(--text-h1);font-weight:var(--weight-bold);line-height:var(--leading-tight);color:var(--text-primary);letter-spacing:-.015em;margin-bottom:1rem}.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;font-size:var(--text-meta);color:var(--text-muted)}.article-meta-item{display:inline-flex;align-items:center;gap:.35rem}.article-content{max-width:720px;font-size:var(--text-body-size);line-height:var(--leading-relaxed);color:var(--text-body);background:var(--bg-page)}.article-content p{margin-bottom:1.4em}.article-content h2{font-size:var(--text-h2);font-weight:var(--weight-bold);line-height:var(--leading-tight);margin-top:2.5em;margin-bottom:.85em;color:var(--text-primary);scroll-margin-top:80px}.article-content h3{font-size:var(--text-h3);font-weight:var(--weight-semibold);line-height:var(--leading-snug);margin-top:1.85em;margin-bottom:.65em;color:var(--text-primary);scroll-margin-top:80px}.article-content h4{font-size:var(--text-h4);font-weight:var(--weight-semibold);line-height:var(--leading-snug);margin-top:1.4em;margin-bottom:.5em;color:var(--text-primary)}.article-content a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;font-weight:var(--weight-medium)}.article-content a:hover{color:var(--accent-hover)}.article-content code{background:var(--bg-code-inline);color:var(--text-primary);padding:.18em .42em;border-radius:4px;font-family:var(--font-mono);font-size:var(--text-code-inline);word-break:break-word}.article-content blockquote{border-left:3px solid var(--accent);background:var(--accent-subtle);padding:1rem 1.25rem;margin:1.6em 0;border-radius:0 6px 6px 0;color:var(--text-body);font-size:var(--text-body-size)}.article-content blockquote p:last-child{margin-bottom:0}.article-content ul,.article-content ol{margin:1.2em 0 1.5em 1.4em;padding-left:.5em}.article-content li{margin-bottom:.55em;line-height:var(--leading-normal)}.table-wrapper{width:100%;overflow-x:auto;margin:1.8em 0;border-radius:6px;border:1px solid var(--border-default)}.article-content table{width:100%;border-collapse:collapse;font-size:var(--text-label);line-height:var(--leading-normal)}.article-content th{background:var(--bg-subtle);font-weight:var(--weight-semibold);text-align:left;padding:.75rem 1rem;border-bottom:1px solid var(--border-default);color:var(--text-primary);white-space:nowrap}.article-content td{padding:.75rem 1rem;border-bottom:1px solid var(--border-subtle);color:var(--text-body)}.article-content tr:last-child td{border-bottom:none}.tldr-box{background:#f8fafc;border:1px solid #cbd5e1;border-left:4px solid var(--accent);padding:1.2rem 1.4rem;border-radius:0 8px 8px 0;margin-bottom:2rem}.tldr-badge{display:inline-block;font-size:var(--text-caption);font-weight:var(--weight-bold);font-family:var(--font-mono);background:var(--accent);color:#fff;padding:.15em .5em;border-radius:3px;margin-bottom:.6rem}.tldr-text{font-size:var(--text-lead);font-weight:var(--weight-medium);line-height:var(--leading-snug);color:var(--text-primary);margin-bottom:0!important}.takeaways-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:8px;padding:1.2rem 1.4rem;margin:1.8em 0}.takeaways-title{font-size:var(--text-h4);font-weight:var(--weight-bold);color:var(--text-primary);margin-bottom:.8rem;display:flex;align-items:center;gap:.4rem}.takeaways-list{list-style:none!important;margin:0!important;padding:0!important}.takeaways-list li{position:relative;padding-left:1.5rem;margin-bottom:.6rem;color:var(--text-body)}.takeaways-list li::before{content:"✔";position:absolute;left:0;color:var(--status-success);font-weight:var(--weight-bold)}.faq-section{margin:2.5em 0;border-top:1px solid var(--border-default);padding-top:1.8em}.faq-item{border-bottom:1px solid var(--border-subtle);padding:1rem 0}.faq-question{font-size:var(--text-h4);font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:.5rem}.faq-answer{color:var(--text-body);line-height:var(--leading-normal);font-size:var(--text-body-size)}.source-box{background:var(--bg-subtle);border:1px solid var(--border-default);border-radius:6px;padding:1rem 1.2rem;margin:2.2em 0 1.5em;font-size:var(--text-meta);color:var(--text-muted)}.source-box h4{font-size:var(--text-label);font-weight:var(--weight-semibold);color:var(--text-primary);margin-bottom:.5rem}.source-box ul{margin:.4em 0 0 1rem!important;padding:0!important}.term-anchor{border-bottom:1px dashed var(--accent);cursor:help;position:relative;color:var(--text-primary)}.term-tooltip{visibility:hidden;opacity:0;position:absolute;bottom:125%;left:50%;transform:translateX(-50%);background:var(--text-primary);color:#fff;padding:.5rem .8rem;border-radius:6px;font-size:var(--text-caption);line-height:var(--leading-snug);white-space:normal;width:max-content;max-width:260px;z-index:50;box-shadow:var(--shadow-md);transition:opacity .2s ease,visibility .2s ease;pointer-events:none}.term-anchor:hover .term-tooltip{visibility:visible;opacity:1}.code-wrapper{position:relative;margin:1.6em 0;border-radius:8px;background-color:var(--bg-code);box-shadow:var(--shadow-md);overflow:hidden;border:1px solid #334155}.code-header{display:flex;justify-content:space-between;align-items:center;padding:.5rem 1rem;background-color:#0f172a;border-bottom:1px solid rgba(255,255,255,8%)}.code-lang-tag{font-family:var(--font-mono);font-size:var(--text-caption);color:var(--code-comment);text-transform:uppercase;letter-spacing:.05em;font-weight:var(--weight-medium)}.code-copy-btn{display:inline-flex;align-items:center;gap:.35rem;padding:.25rem .6rem;font-size:var(--text-caption);font-family:var(--font-mono);background:rgba(255,255,255,8%);color:var(--code-text);border:1px solid rgba(255,255,255,.15);border-radius:4px;cursor:pointer;transition:all .15s ease}.code-copy-btn:hover{background:rgba(255,255,255,.18);color:#fff}.code-copy-btn.copied{background:var(--status-success);border-color:var(--status-success);color:#fff}.article-content pre,.code-wrapper pre{background:var(--bg-code);color:var(--code-text);padding:1.2em 1.4em;border-radius:8px;overflow-x:auto;font-family:var(--font-mono);font-size:var(--text-code-block);line-height:var(--leading-code);margin:1.5em 0;position:relative;-webkit-overflow-scrolling:touch}.code-wrapper pre{margin:0;border-radius:0}.article-content pre code{background:0 0!important;color:inherit!important;padding:0!important;font-size:inherit!important;border-radius:0!important;word-break:normal}.terminal-window{background-color:#0b1120;border:1px solid #1e293b;border-radius:8px;margin:1.8em 0;overflow:hidden;box-shadow:0 10px 15px -3px rgba(0,0,0,.25)}.terminal-header{display:flex;align-items:center;justify-content:space-between;padding:.6rem 1rem;background-color:#0f172a;border-bottom:1px solid #1e293b}.terminal-controls{display:flex;align-items:center;gap:6px}.terminal-dot{width:11px;height:11px;border-radius:50%;display:inline-block}.dot-red{background-color:#ef4444}.dot-yellow{background-color:#f59e0b}.dot-green{background-color:#10b981}.terminal-title{font-family:var(--font-mono);font-size:var(--text-caption);color:#94a3b8;letter-spacing:.02em}.terminal-copy-btn{font-family:var(--font-mono);font-size:var(--text-caption);color:#94a3b8;background:rgba(255,255,255,5%);border:1px solid rgba(255,255,255,.1);border-radius:4px;padding:.2rem .5rem;cursor:pointer;transition:all .15s ease}.terminal-copy-btn:hover{color:#fff;background:rgba(255,255,255,.12)}.terminal-copy-btn.copied{background:var(--status-success);color:#fff}.terminal-body{padding:1.2em 1.4em;font-family:var(--font-mono);font-size:var(--text-code-block);line-height:var(--leading-code);color:#e2e8f0;overflow-x:auto;white-space:pre;-webkit-overflow-scrolling:touch}.terminal-line{display:block}.terminal-cmd{color:#f8fafc;font-weight:var(--weight-medium)}.terminal-cmd::before{content:"$ ";color:#64748b;user-select:none}.terminal-output{color:#94a3b8}.terminal-comment{color:#475569;font-style:italic}