:root{color-scheme:light;--canvas:#F2F3F8;--sidebar:#ECEFF6;--panel:#FFFFFF;--muted-panel:#F1F3F8;--text:#202128;--secondary:#5F626D;--muted:#6B6E79;--border:#00000012;--border-strong:#0000001C;--accent:#2658FA;--link:#2658FA;--focus:#2658FA;--accent-soft:#E3E7FF;--selection:#D9E4FB;--on-accent:#FFF;--shadow:#00000014;--header-height:72px;--sidebar-width:248px;--scroll-thumb:rgba(126,126,126,.36);--scroll-hover:rgba(126,126,126,.55);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC",sans-serif;font-size:14px}
:root[data-theme=dark]{color-scheme:dark;--canvas:#191919;--sidebar:#202020;--panel:#202020;--muted-panel:#2A2A2A;--text:#F0EFED;--secondary:#B5B3AD;--muted:#9B9994;--border:#FFFFFF14;--border-strong:#FFFFFF24;--accent:#2375C7;--link:#529CCA;--focus:#2383E2;--accent-soft:#20364A;--selection:#2E2E2E;--on-accent:#FFF;--shadow:#00000059}
*{box-sizing:border-box;scrollbar-width:auto;scrollbar-color:auto}*::-webkit-scrollbar{width:5px;height:5px}*::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:3px}*::-webkit-scrollbar-thumb:hover{background:var(--scroll-hover)}*::-webkit-scrollbar-track,*::-webkit-scrollbar-corner{background:transparent}
html{scroll-padding-top:100px;scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--text);line-height:1.7}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{color:var(--secondary);background:none;border:0}button:disabled{cursor:default}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--focus);outline-offset:4px;border-radius:7px}::selection{background:var(--selection)}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}h1{font-size:25px;font-weight:500;line-height:1.55;letter-spacing:-.6px}h2{font-size:16px;font-weight:600}h3{font-size:16px;font-weight:500}p{color:var(--secondary)}kbd{border:1px solid var(--border-strong);border-radius:5px;min-width:36px;padding:0 5px;font:11px/21px -apple-system,BlinkMacSystemFont,sans-serif;text-align:center;color:var(--muted);white-space:nowrap}.sr-only{position:absolute;clip:rect(0,0,0,0);clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}.skip-link{position:fixed;top:-90px;left:16px;z-index:80;background:var(--accent);color:var(--on-accent);padding:8px 16px;border-radius:10px}.skip-link:focus{top:12px}
.site-header{height:var(--header-height);background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:fixed;inset:0 0 auto;z-index:30;gap:24px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}.brand img{border-radius:8px}.brand strong{font-size:18px;font-weight:600;letter-spacing:-.6px}.brand>span:last-child{font-size:13px;color:var(--secondary)}.brand-divider{height:16px;width:1px;background:var(--border-strong);margin:0 6px}.header-nav{display:flex;gap:24px;align-items:center;font-size:12.5px}.header-nav>a{color:var(--secondary)}.header-nav>a:hover,.header-nav>a[aria-current]{color:var(--link)}.header-search{border:1px solid var(--border);border-radius:10px;min-height:32px;display:flex;gap:8px;align-items:center;padding:0 10px;background:var(--muted-panel)}.header-search>span{font-size:22px;line-height:1}.theme-toggle{min-height:32px;min-width:40px;border-radius:10px;padding:0 8px}.theme-toggle:hover{background:var(--muted-panel)}.menu-toggle{display:none}
.sidebar{position:fixed;left:0;top:var(--header-height);bottom:0;width:var(--sidebar-width);background:var(--sidebar);border-right:1px solid var(--border);overflow:auto;z-index:20}.sidebar-inner{padding:28px 16px 48px}.nav-home{min-height:36px;display:flex;align-items:center;justify-content:space-between;padding:7px 12px;border-radius:7px;font-size:13px;margin-bottom:22px}.active{background:var(--selection);color:var(--link)}.nav-home:hover,.nav-articles a:hover{background:var(--muted-panel)}.nav-group{margin-bottom:18px}.nav-group summary{list-style:none;display:flex;align-items:center;gap:8px;cursor:pointer;min-height:32px;font-weight:500;font-size:12px;color:var(--secondary);padding:4px 10px}.nav-group summary::-webkit-details-marker{display:none}.nav-number{font-size:10px;letter-spacing:.5px;color:var(--muted);font-variant-numeric:tabular-nums}.disclosure{margin-left:auto;color:var(--muted);transition:transform .18s}.nav-group:not([open]) .disclosure{transform:rotate(-90deg)}.nav-articles{display:grid;gap:2px}.nav-articles a{display:block;padding:7px 10px 7px 30px;font-size:12px;color:var(--secondary);border-radius:7px;line-height:1.6}.nav-articles .active{color:var(--link)}.sidebar-foot{border-top:1px solid var(--border);padding:20px 12px 0;margin-top:28px;display:grid;gap:8px;color:var(--secondary);font-size:12px}.sidebar-foot small{font-size:11px;color:var(--muted)}
.main{margin-left:var(--sidebar-width);padding-top:var(--header-height);min-height:100vh}.home-content{max-width:1104px;margin:0 auto;padding:56px 56px 0}.eyebrow{font-size:10px;font-weight:500;letter-spacing:1.5px;color:var(--muted);display:flex;align-items:center;gap:10px}.little-square{display:inline-block;flex-shrink:0;width:7px;height:7px;border-radius:2px;background:var(--link)}.home-hero{max-width:620px;margin-bottom:40px}.home-hero .eyebrow{margin-bottom:22px}.home-hero h1{margin-bottom:16px}.home-hero>p{font-size:14px;line-height:1.9;margin-bottom:24px}.hero-search{display:flex;align-items:center;gap:12px;background:var(--panel);border:1px solid var(--border-strong);border-radius:10px;width:100%;min-height:52px;padding:10px 16px;text-align:left;font-size:13.5px}.hero-search:hover{border-color:var(--link)}.hero-search kbd{margin-left:auto}.search-symbol{font-size:28px;line-height:1;color:var(--muted)}.hero-hints{display:flex;align-items:center;gap:12px;padding-top:12px;font-size:11px;color:var(--muted)}.search-preset{font-size:11px;padding:2px 0;text-decoration:underline;text-decoration-color:var(--border-strong);text-underline-offset:4px}.search-preset:hover{color:var(--link)}.start-banner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 28px;background:var(--accent-soft);border:1px solid var(--border);border-radius:10px;margin-bottom:44px}.banner-label{font-size:11px;font-weight:500;color:var(--link)}.start-banner h2{font-size:14px;font-weight:500;margin:8px 0}.start-banner p{font-size:12px;margin-bottom:0}.banner-action{display:flex;align-items:center;gap:16px;color:var(--link);font-size:12.5px;white-space:nowrap}.start-banner:hover{border-color:var(--link)}.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:16px}.section-title h2{font-size:16px;font-weight:500;margin:0}.section-title>span{font-size:11px;color:var(--muted)}.category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.category-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:24px;scroll-margin-top:100px}.card-overline{display:flex;gap:12px;align-items:center;font-size:10px;color:var(--muted);margin-bottom:14px}.card-overline>span:first-child{color:var(--link);font-variant-numeric:tabular-nums;letter-spacing:1px}.category-card h3{margin-bottom:8px}.category-card>p{font-size:12px;margin-bottom:20px}.category-card ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}.category-card li>a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 0;font-size:12.5px;line-height:1.6}.category-card li>a:hover{color:var(--link)}.category-card li>a>span:last-child{color:var(--muted)}.popular{margin-top:40px}.popular-list{border-top:1px solid var(--border-strong)}.popular-list>a{display:flex;gap:20px;align-items:center;padding:18px 8px;border-bottom:1px solid var(--border);font-size:13px}.popular-list>a:hover{color:var(--link);background:var(--panel)}.popular-number{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}.arrow{margin-left:auto;color:var(--muted);font-size:17px}.home-footnote{display:flex;align-items:flex-start;gap:14px;padding:48px 0 40px}.home-footnote .little-square{margin-top:8px}.home-footnote p{font-size:12px;color:var(--text);margin:0;line-height:2}.home-footnote p span{color:var(--muted)}.site-footer{border-top:1px solid var(--border);max-width:992px;margin:0 auto;padding:24px 0 32px;display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:11px}.site-footer>a{color:var(--secondary)}
.article-main{background:var(--panel)}.document-layout{max-width:1160px;display:grid;grid-template-columns:minmax(0,700px) 180px;gap:56px;margin:0 auto;padding:40px 56px 0}.document{min-width:0}.breadcrumbs{display:flex;gap:12px;align-items:center;font-size:11px;color:var(--muted);margin-bottom:32px}.breadcrumbs a:hover{color:var(--link)}.article-header{border-bottom:1px solid var(--border);padding-bottom:28px;margin-bottom:32px}.article-header .eyebrow{margin-bottom:14px}.article-header h1{margin-bottom:12px}.article-summary{font-size:14px;line-height:1.9;margin-bottom:20px}.article-meta{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.platform{font-size:10px;color:var(--secondary);border:1px solid var(--border);background:var(--muted-panel);padding:2px 7px;border-radius:5px;line-height:1.6}.meta-date{margin-left:6px;font-size:11px;color:var(--muted)}.article-section{margin-bottom:36px}.article-section h2{margin-bottom:16px;scroll-margin-top:100px;font-size:16px}.article-section h2>a{display:flex;align-items:center;gap:12px;width:fit-content}.heading-link{font-weight:400;color:var(--muted);font-size:13px;opacity:0}.article-section h2:hover .heading-link,.article-section h2 a:focus-visible .heading-link{opacity:1}.article-section p,.article-section li{font-size:14px;line-height:1.95;overflow-wrap:anywhere}.article-section p{margin-bottom:14px;color:var(--secondary)}.article-section ul,.article-section ol{padding-left:22px;color:var(--secondary);margin:16px 0}.article-section li{padding-left:4px;margin-bottom:12px}.steps{list-style:none;counter-reset:steps;padding-left:0!important}.steps li{position:relative;padding-left:36px;margin-bottom:16px;counter-increment:steps}.steps li:before{content:counter(steps);position:absolute;left:0;top:2px;width:24px;height:24px;border:1px solid var(--border);background:var(--muted-panel);border-radius:7px;text-align:center;line-height:22px;font-size:11px;color:var(--secondary);font-variant-numeric:tabular-nums}.note{padding:16px 20px;background:var(--muted-panel);border:1px solid var(--border);border-left:3px solid var(--link);border-radius:0 10px 10px 0;margin-top:20px}.note strong{font-size:12px;font-weight:500;color:var(--text)}.note p{font-size:12px;line-height:1.9;margin:8px 0 0}.table-scroll{overflow:auto;border:1px solid var(--border);border-radius:10px}table{border-collapse:collapse;width:100%;font-size:12px;text-align:left}th,td{padding:12px 16px;border-bottom:1px solid var(--border);line-height:1.7}th{background:var(--muted-panel);font-weight:500}td{color:var(--secondary)}tr:last-child td{border-bottom:0}.article-end{padding-top:28px;border-top:1px solid var(--border);margin-top:40px}.article-end>span{font-size:12px;color:var(--muted)}.related{display:grid;gap:8px;margin-top:16px}.related a{border:1px solid var(--border);border-radius:10px;padding:12px 16px;display:flex;justify-content:space-between;gap:16px;font-size:13px}.related a:hover{background:var(--muted-panel);color:var(--link)}.document-bottom{margin:32px 0 40px;display:flex;justify-content:space-between;gap:16px;font-size:11px;color:var(--muted)}.document-bottom a:hover{color:var(--link)}.toc{align-self:start;position:sticky;top:112px;padding-top:62px}.toc .eyebrow{letter-spacing:0;font-size:11px}.toc nav{display:grid;gap:12px;margin-top:18px;border-left:1px solid var(--border);padding-left:16px}.toc a{font-size:11px;color:var(--secondary);line-height:1.8}.toc a:hover{color:var(--link)}.toc-rule{height:1px;background:var(--border);margin:28px 0 20px}.toc>p{font-size:11px;color:var(--muted);line-height:1.9}.article-main>.site-footer{margin:0 56px;padding-top:24px;max-width:none}
dialog{position:fixed;top:min(16vh,140px);margin:0 auto;padding:0;width:calc(100% - 32px);max-width:640px;max-height:72vh;color:var(--text);background:var(--panel);border:1px solid var(--border-strong);border-radius:18px;box-shadow:0 8px 24px var(--shadow);overflow:hidden}dialog::backdrop{background:rgba(18,22,34,.35);backdrop-filter:blur(3px)}.search-dialog-header{display:flex;gap:12px;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}.search-dialog-header input{flex:1;min-width:0;font-size:14px;line-height:28px;border:0;outline:none;background:transparent;color:var(--text)}.search-dialog-header input:focus-visible{outline:0}.search-dialog-header input::-webkit-search-cancel-button{display:none}.search-dialog-header button{font-size:11px;min-height:28px;padding:0 6px;border-radius:5px;border:1px solid var(--border)}#search-status{font-size:11px;color:var(--muted);padding:16px 20px 8px}.search-results{max-height:calc(72vh - 160px);overflow:auto;padding:0 10px 24px;min-height:120px}.search-result{display:flex;gap:16px;align-items:center;padding:12px;border-radius:10px;min-height:80px}.search-result[aria-selected=true]{background:var(--muted-panel)}.search-result small{display:block;color:var(--muted);font-size:10px}.search-result strong{display:block;font-size:13px;font-weight:500;margin:3px 0}.search-result p{font-size:11px;margin:0;line-height:1.8}.search-result-arrow{margin-left:auto;color:var(--muted)}.search-dialog-footer{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--border);font-size:10px;color:var(--muted);padding:12px 20px}.footer-dot{margin:0 4px}.search-empty{padding:24px 12px}.search-empty strong{font-size:14px;font-weight:500}.search-empty p{font-size:12px;margin:8px 0}.search-retry{margin:12px;padding:8px 12px;border:1px solid var(--border);border-radius:10px}.not-found{max-width:640px;padding:100px 24px;margin:0 auto}.not-found .eyebrow{margin-top:24px}.button-primary{display:inline-block;padding:10px 16px;border-radius:10px;background:var(--accent);color:var(--on-accent);font-size:13px}.sidebar-backdrop{position:fixed;inset:var(--header-height) 0 0;background:rgba(18,22,34,.35);z-index:35}
@media(min-width:1600px){.home-content{padding-top:72px}.home-hero{margin-bottom:44px}.document-layout{padding-top:48px}}
@media(max-width:1200px){.document-layout{grid-template-columns:minmax(0,1fr);max-width:800px;padding:36px 40px 0}.toc{display:none}.home-content{padding:40px 32px 0}.site-footer{margin:0 32px}.article-main>.site-footer{margin:0 40px}.header-nav{gap:16px}.category-card{padding:20px}}
@media(max-width:960px){:root{--sidebar-width:224px}.site-header{padding:0 24px}.header-nav>a{display:none}.home-content{padding:36px 28px 0}.category-grid{gap:12px}.category-card{padding:18px}.start-banner{padding:20px;align-items:flex-start;flex-direction:column;gap:16px}.banner-action{width:100%;justify-content:space-between}.category-card>p{min-height:40px}.brand strong{font-size:16px}.home-hero>p{font-size:13px}}
@media(max-width:760px){:root{--header-height:64px;--sidebar-width:276px}.site-header{padding:0 16px;gap:10px}.brand{gap:8px}.brand img{width:28px;height:28px}.brand strong{font-size:16px}.brand-divider,.brand>span:last-child{display:none}.header-nav{gap:6px}.header-search{font-size:0;width:40px;height:44px;justify-content:center;padding:0;border:none;background:none}.header-search kbd{display:none}.header-search>span{font-size:26px}.theme-toggle{height:44px;font-size:12px}.menu-toggle{display:block;height:44px;font-size:12px;border-radius:10px;padding:0 10px}.menu-toggle:hover{background:var(--muted-panel)}.sidebar{transform:translateX(-100%);z-index:40;transition:transform .18s;visibility:hidden}.menu-open .sidebar{transform:translateX(0);visibility:visible}.menu-open{overflow:hidden}.main{margin-left:0}.home-content{padding:32px 20px 0}.home-hero{max-width:none;margin-bottom:28px}.home-hero .eyebrow{font-size:9px;margin-bottom:20px}.home-hero h1{font-size:25px}.hero-search{min-height:52px}.hero-hints{gap:16px}.hero-hints button{min-height:32px}.start-banner{margin-bottom:32px;padding:20px}.start-banner h2{line-height:1.9}.category-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.category-card{padding:18px}.category-card>p{min-height:40px}.card-overline{gap:8px;font-size:9px}.category-card li>a{font-size:12px;min-height:44px}.category-card h3{font-size:14px}.category-card li>a>span:last-child{display:none}.section-title>span{font-size:10px}.section-title h2{font-size:14px}.popular-list>a{min-height:56px;padding:16px 4px;gap:16px}.home-footnote{padding:32px 0}.site-footer,.article-main>.site-footer{margin:0 20px;flex-direction:column;gap:6px;padding:20px 0 24px}.document-layout{padding:24px 20px 0}.breadcrumbs{margin-bottom:28px}.article-header h1{font-size:25px;overflow-wrap:anywhere}.article-header{padding-bottom:24px;margin-bottom:28px}.article-section p,.article-section li{font-size:14px;line-height:2}.toc{display:none}.related a{min-height:44px}.document-bottom a{min-height:44px;display:flex;align-items:center}.meta-date{width:100%;margin:4px 0 0}.search-dialog-header{padding:12px}.search-dialog-footer{padding:12px;font-size:9px}.search-result{min-height:88px}.search-dialog-header button{min-height:36px}.nav-articles a{min-height:44px;display:flex;align-items:center}.nav-group summary{min-height:44px}.nav-home{min-height:44px}.article-section h2 .heading-link{opacity:1}}
@media(max-width:420px){.category-grid{grid-template-columns:minmax(0,1fr)}.category-card>p{min-height:0}.category-card li>a>span:last-child{display:inline}.hero-search{font-size:12px;padding:10px 12px}.hero-search kbd{display:none}.category-card{padding:20px}.card-overline{font-size:10px}.category-card h3{font-size:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}

/* Keep the search body scrollable on short screens and with mobile keyboards. */
dialog[open]{display:flex;flex-direction:column;max-height:min(72vh,calc(100dvh - 32px))}.search-dialog-header,.search-dialog-footer,#search-status{flex-shrink:0}.search-results{flex:1;min-height:0}.search-dialog-header:focus-within{box-shadow:inset 0 -2px 0 var(--focus)}
@media(max-width:760px){.search-dialog-header input{font-size:16px}.search-dialog-header button{min-height:44px}}

.guide-image{margin:24px 0}.guide-image img{display:block;width:100%;height:auto;aspect-ratio:3/1;border-radius:12px;border:1px solid var(--border)}.guide-image figcaption{margin-top:10px;font-size:12px;line-height:1.8;color:var(--secondary)}.guide-image .image-dark{display:none}:root[data-theme=dark] .guide-image .image-light{display:none}:root[data-theme=dark] .guide-image .image-dark{display:block}