:root{--bg:#fff;--soft:#f7f8fa;--ink:#202530;--muted:#687282;--line:#e7eaee;--accent:#3858d8;--tint:#eef3ff;--header:#0b1018;font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button{border:0;background:none}html{scroll-padding-top:100px;scroll-behavior:smooth}header{height:72px;background:var(--header);color:#e7edf2;display:flex;align-items:center;justify-content:space-between;padding:0 40px;position:sticky;top:0;z-index:20;border-bottom:1px solid #242b36}.brand{display:flex;align-items:center;gap:10px;font-size:25px;font-weight:650}.brand img{width:34px;height:34px;object-fit:contain}.brand small{font-size:13px;letter-spacing:2px;color:#9faab9;font-weight:400}.divider{height:22px;width:1px;background:#35404d;margin:0 10px}.brand .label{font-size:17px;font-weight:400;color:#c0cad5;letter-spacing:0}.head-right{display:flex;align-items:center;gap:26px;font-size:15px;color:#aab5c4}.head-right a:hover{color:white}.header-search{display:flex;gap:20px;align-items:center;border:1px solid #36404c;padding:9px 13px;border-radius:7px;background:#ffffff06;min-width:204px;text-align:left}.header-search kbd{font-size:12px;margin-left:auto;color:#94a0ad}.download{border:1px solid #566169!important;padding:8px 12px;border-radius:6px;color:#dce7e9!important}.theme{font-size:22px;padding:3px}.mobile-menu{display:none}.shell{display:grid;grid-template-columns:248px minmax(0,1fr);max-width:1600px;margin:auto}.sidebar{height:calc(100vh - 72px);position:sticky;top:72px;padding:28px 20px 20px 24px;background:var(--soft);border-right:1px solid var(--line);overflow:auto;display:flex;flex-direction:column}.navhome{font-size:16px;font-weight:600;padding:12px;border-radius:6px;display:block;margin-bottom:25px}.navhome.active{color:var(--accent);background:var(--tint)}.navgroup{font-size:13px;color:var(--muted);font-weight:600;margin:0 12px 10px}.navlinks{margin-bottom:23px}.navlink{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:5px;font-size:14px;line-height:1.5}.navlink span{font-family:Consolas,monospace;font-size:12px;color:#939ba6}.navlink.active{background:var(--tint);color:var(--accent);font-weight:600}.navlink:hover{background:var(--line)}.sidebar-footer{border-top:1px solid var(--line);margin-top:auto;padding:20px 12px 0;font-size:13px;color:var(--muted);line-height:2}.sidebar-footer strong{font-weight:500;color:var(--ink)}main{min-width:0}.home{padding:53px 60px 44px;max-width:1220px;margin:auto}.eyebrow{font-size:12px;color:var(--accent);letter-spacing:2px;font-family:Consolas,monospace;margin:0 0 17px}h1{font-size:39px;line-height:1.35;letter-spacing:-1px;font-weight:650;margin:0 0 15px}.intro{color:var(--muted);font-size:16px;line-height:1.85;max-width:680px;margin:0}.home-search{display:flex;gap:12px;align-items:center;border:1px solid #d7dfe4;border-radius:8px;padding:14px 18px;margin:25px 0 32px;max-width:700px;box-shadow:0 3px 12px #365fe010;background:var(--bg)}.home-search span{font-size:21px;color:var(--accent)}.home-search input{width:100%;border:0;outline:none;background:none;color:var(--ink);font-size:15px}.home-search kbd{font-size:12px;color:var(--muted);white-space:nowrap}.paths{display:grid;grid-template-columns:1.1fr 1fr;gap:16px;margin-bottom:37px}.path{padding:23px 24px;border:1px solid var(--line);border-radius:9px;background:var(--bg)}.path.first{background:linear-gradient(125deg,var(--tint),var(--bg));border-color:#dce4fb}.path .tag{font-size:12px;color:var(--accent);letter-spacing:1px}.path h2{font-size:20px;font-weight:600;margin:10px 0 9px}.path p{font-size:14px;color:var(--muted);line-height:1.8;margin:0}.path a{display:inline-flex;gap:20px;align-items:center;font-size:14px;margin-top:18px;color:var(--accent);font-weight:600}.primary{padding:9px 13px;color:#fff!important;background:var(--accent);border-radius:5px}.section-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.section-top h2{font-size:20px;margin:0;font-weight:600}.section-top span{font-size:13px;color:var(--muted)}.filters{display:flex;gap:7px;margin:0 0 14px;flex-wrap:wrap}.filter{padding:7px 12px;color:var(--muted);border-radius:5px;font-size:13px}.filter.active{color:var(--accent);background:var(--tint)}.course-list{border-top:1px solid var(--line)}.course-row{display:grid;grid-template-columns:37px minmax(170px,1fr) minmax(230px,1.6fr) 30px;align-items:center;gap:10px;padding:16px 7px;border-bottom:1px solid var(--line);transition:background .15s}.course-row:hover{background:var(--soft)}.number{font-family:Consolas,monospace;font-size:13px;color:#8c97a3}.course-title{font-size:15px;font-weight:550}.course-desc{font-size:14px;color:var(--muted)}.arrow{justify-self:end;color:var(--accent);font-size:19px}.read{display:grid;grid-template-columns:minmax(0,760px) 182px;gap:50px;padding:37px 45px 70px 55px;justify-content:center}.article{min-width:0;max-width:730px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}.breadcrumb span{margin:0 9px}.article h1{font-size:34px}.meta{font-size:13px;color:var(--muted);display:flex;gap:20px;margin:17px 0 26px}.outcome{background:var(--tint);border:1px solid #dce4fb;border-radius:7px;padding:19px 22px;margin-bottom:28px}.outcome strong{font-size:15px;font-weight:600;color:var(--accent)}.outcome p{font-size:15px;line-height:1.8;margin:9px 0 0}.outcome small{font-size:13px;color:var(--muted);display:block;margin-top:12px}.article-body{font-size:16px;line-height:1.85}.article-body h2{font-size:23px;font-weight:600;padding-top:12px;margin:29px 0 16px;border-top:1px solid var(--line)}.article-body h3{font-size:19px;margin-top:27px;font-weight:600}.article-body p{margin:12px 0}.article-body li{margin:5px 0}.article-body strong{font-weight:600}.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.article-body code{padding:2px 5px;background:var(--soft);border-radius:3px;font-size:14px;overflow-wrap:anywhere}.article-body pre{overflow:auto;background:var(--soft);padding:16px}.article-body figure{margin:20px 0 25px}.zoom{display:block;padding:0;width:100%;border:1px solid var(--line);border-radius:7px;overflow:hidden;line-height:0;background:var(--soft);cursor:zoom-in}.zoom img{max-width:100%;width:100%;height:auto}.article-body figcaption{font-size:12px;color:var(--muted);text-align:center;margin-top:9px}.article-body .callout{background:var(--soft);border-left:3px solid var(--accent);padding:13px 16px;margin:14px 0;border-radius:0 5px 5px 0;font-size:15px}.table-wrap{overflow:auto}.article-body table{border-collapse:collapse;font-size:14px;width:100%}.article-body td,.article-body th{padding:10px 12px;border:1px solid var(--line);text-align:left}.article-body th{background:var(--soft)}.toc{position:sticky;top:111px;align-self:start;border-left:1px solid var(--line);padding-left:19px;font-size:13px;max-height:calc(100vh - 145px);overflow:auto}.toc strong{display:block;font-size:13px;margin-bottom:17px;font-weight:600}.toc a{display:block;color:var(--muted);line-height:1.6;margin-bottom:13px}.toc a.active{color:var(--accent)}.toc .small{font-size:12px;margin-left:9px}.toc hr{border:0;border-top:1px solid var(--line);margin:25px 0 16px}.toc p{font-size:12px;line-height:1.8;color:var(--muted)}.toc button{font-size:13px;color:var(--accent);padding:0}.pager{margin-top:36px;display:grid;grid-template-columns:1fr 1fr;gap:16px}.pager a{padding:18px;border:1px solid var(--line);border-radius:6px;font-size:14px}.pager small{display:block;color:var(--muted);font-size:12px;margin-bottom:9px}.mobile-outline{display:none}.preview-note{position:fixed;right:20px;bottom:16px;background:#101820e8;color:#dce4f7;border:1px solid #ffffff18;border-radius:20px;font-size:12px;padding:8px 13px;z-index:15;box-shadow:0 3px 10px #0001}.preview-note span{color:#b1bfff;margin-right:7px}.empty{color:var(--muted);padding:25px;text-align:center;font-size:15px}dialog{border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);padding:25px;width:min(680px,calc(100% - 32px));max-height:82vh;box-shadow:0 20px 90px #0003}dialog::backdrop{background:#080e1866;backdrop-filter:blur(3px)}dialog .dialogtop{display:flex;gap:10px}dialog input{width:100%;border:0;border-bottom:1px solid var(--line);padding:10px;background:none;color:var(--ink)}.results{max-height:60vh;overflow:auto}.result{display:block;padding:17px 6px;border-bottom:1px solid var(--line);font-size:15px}.result small{display:block;font-size:13px;color:var(--muted);line-height:1.8;margin-top:8px}.lightbox{width:min(1400px,95vw);padding:10px}.lightbox img{width:100%;height:auto}.lightbox button{display:block;margin-left:auto;font-size:14px;padding:10px}[data-theme=dark]{--bg:#10141c;--soft:#171c25;--ink:#e4eaf1;--muted:#a1abba;--line:#2c3440;--accent:#a8b8ff;--tint:#1b2340}[data-theme=dark] .outcome,[data-theme=dark] .path.first{border-color:#344367}[data-theme=dark] .primary{background:#a8b8ff;color:#101d44!important}.hidden{display:none!important}ul,ol{padding-left:24px}
@media(min-width:1500px){.home{padding-left:80px;padding-right:80px}.read{padding-left:75px;gap:65px}}
@media(max-width:1200px){header{padding:0 25px}.shell{grid-template-columns:224px 1fr}.sidebar{padding-left:15px;padding-right:12px}.home{padding:40px 35px}.read{padding:32px 35px;grid-template-columns:minmax(0,1fr)}.toc{display:none}.course-row{grid-template-columns:33px 1fr 1.3fr 20px}.head-right{gap:17px}.home h1{font-size:35px}}
@media(max-width:850px){header{padding:0 18px;height:62px}.brand{font-size:22px}.brand small,.brand .divider,.head-right>a,.header-search kbd{display:none}.brand img{width:28px;height:28px}.brand .label{font-size:14px;margin-left:5px}.head-right{gap:12px}.header-search{min-width:0;border:0;padding:5px;font-size:0;gap:0}.header-search:before{content:'⌕';font-size:27px}.theme{font-size:23px}.mobile-menu{display:block;padding:6px;font-size:23px}.shell{display:block}.sidebar{display:none;position:fixed;top:62px;left:0;width:280px;z-index:18;height:calc(100vh - 62px);box-shadow:25px 0 70px #0003}.sidebar.open{display:flex}.home{padding:31px 22px 65px}.eyebrow{font-size:11px;margin-bottom:13px}h1,.home h1{font-size:30px;line-height:1.4;letter-spacing:-.7px}.intro{font-size:15px}.home-search{padding:13px;margin:22px 0}.home-search kbd{display:none}.paths{grid-template-columns:1fr;margin-bottom:29px;gap:12px}.path{padding:19px 20px}.path h2{font-size:19px}.section-top h2{font-size:19px}.section-top span{font-size:12px}.filters{gap:3px}.filter{font-size:12px;padding:7px 9px}.course-row{grid-template-columns:27px 1fr 18px;gap:9px;padding:15px 0}.course-desc{grid-column:2;grid-row:2;font-size:13px;line-height:1.8}.arrow{grid-column:3;grid-row:1/3}.course-title{font-size:15px}.read{padding:24px 22px 65px;display:block}.article h1{font-size:29px}.meta{font-size:12px;gap:12px;flex-wrap:wrap;margin-bottom:20px}.outcome{padding:17px;margin-bottom:25px}.article-body{font-size:16px;line-height:1.85}.article-body h2{font-size:21px;margin-top:26px}.article-body figure{margin:17px -5px}.mobile-outline{display:block;position:sticky;top:62px;z-index:12;background:var(--soft);border-bottom:1px solid var(--line);font-size:13px;padding:11px 22px}.mobile-outline summary{cursor:pointer}.mobile-outline a{display:block;color:var(--muted);padding:7px 0}.mobile-outline[open]{max-height:45vh;overflow:auto}.preview-note{bottom:10px;right:10px;padding:7px 11px;font-size:11px}.pager{gap:10px}.pager a{padding:13px;font-size:13px}.breadcrumb{font-size:12px;margin-bottom:21px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

:root{--brand-cyan:#10bce6;--brand-blue:#4d78f1;--brand-violet:#9b53eb}
.brand-gradient{background:linear-gradient(105deg,#237ccf 0%,#496ee6 48%,#8856d7 100%);background-clip:text;-webkit-background-clip:text;color:transparent}
.primary{background:linear-gradient(110deg,#365ee2,#7654dd);box-shadow:0 3px 9px #5365e21a}
.primary:hover{background:linear-gradient(110deg,#2c50cb,#6243c7)}
.path.first{background:linear-gradient(120deg,#eef8ff 0%,#f4f3ff 60%,var(--bg) 100%);border-color:#dce4fb}
.navhome.active,.navlink.active{box-shadow:inset 3px 0 0 #5a72e8}
[data-theme=dark] .brand-gradient{background-image:linear-gradient(105deg,#5ccbe9,#8faaff 48%,#c494f8)}
[data-theme=dark] .path.first{background:linear-gradient(120deg,#172b3c,#23233c 60%,var(--bg));border-color:#344367}
[data-theme=dark] .primary{background:linear-gradient(110deg,#94b8ff,#c3a3ff);color:#101d44!important}
[data-theme=dark] .primary:hover{background:linear-gradient(110deg,#aac8ff,#d0b4ff)}
.outcome a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.outcome small{line-height:1.85}.outcome p{line-height:1.85}
.article-body strong{font-weight:700}
.article-body .launch-file{font-family:inherit;font-size:1em;font-weight:650;color:#3858d8;background:#eef3ff;border:1px solid #ccd8ff;border-radius:4px;padding:2px 7px;white-space:nowrap}
[data-theme=dark] .article-body .launch-file{color:#c0ccff;background:#253154;border-color:#45589d}
.lightbox{position:fixed;width:min(720px,calc(100vw - 32px));height:min(360px,calc(100dvh - 40px));max-width:calc(100vw - 32px);max-height:calc(100dvh - 40px);padding:0;overflow:hidden;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.lightbox[open]{display:flex;flex-direction:column}
.image-toolbar{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;padding:10px 72px 10px 14px;border-bottom:1px solid var(--line);background:var(--bg);flex-shrink:0}
.image-caption{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px;font-weight:550;margin:0;color:var(--ink)}
.image-controls{display:flex;align-items:center;justify-content:center;gap:4px}
.lightbox button{display:inline-flex;align-items:center;justify-content:center;margin:0;border:1px solid var(--line);border-radius:6px;min-width:44px;height:44px;padding:0 10px;font-size:13px;font-weight:550;background:var(--bg);color:var(--ink);touch-action:manipulation;white-space:nowrap;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}
.lightbox button:hover{background:var(--tint);color:var(--accent);border-color:var(--accent)}
.lightbox button:disabled{opacity:.4;cursor:default;background:var(--bg);color:var(--muted);border-color:var(--line)}
.lightbox .image-icon{font-size:22px;padding:0;line-height:1}
.lightbox #closeImage{position:absolute;top:10px;right:14px;z-index:5;width:44px;height:44px;box-shadow:0 2px 6px #00000008}
.lightbox button[hidden]{display:none}
.image-percent{width:48px;text-align:center;font-size:12px;font-variant-numeric:tabular-nums;color:var(--muted);flex-shrink:0}
.lightbox #imageFit{color:var(--accent);background:var(--tint)}
.image-viewport{position:relative;flex:1;min-height:0;overflow:hidden;background:var(--soft);touch-action:none;overscroll-behavior:contain;cursor:default}
.image-viewport.is-pannable{cursor:grab}
.image-viewport.is-dragging{cursor:grabbing}
.image-viewport.is-scrollable{overflow:auto;scrollbar-gutter:stable;scroll-behavior:auto}
.image-canvas{position:absolute;inset:0;width:100%;height:100%}
.is-scrollable .image-canvas{position:relative;inset:auto}
.lightbox #bigImage{position:absolute;top:0;left:0;width:auto;height:auto;max-width:none;max-height:none;object-fit:initial;transform-origin:0 0;user-select:none;-webkit-user-select:none;pointer-events:none;will-change:transform;display:block}
.image-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:14px;pointer-events:none}
.image-loading[hidden]{display:none}
.image-help{margin:0;padding:10px 14px;border-top:1px solid var(--line);font-size:12px;line-height:1.5;color:var(--muted);text-align:center;background:var(--bg);flex-shrink:0}
.image-help-mobile{display:none}
.lightbox.is-compact .image-toolbar{grid-template-columns:minmax(0,1fr);gap:8px;padding:8px 10px}
.lightbox.is-compact .image-controls{grid-column:1/-1;grid-row:2;justify-content:center}
.lightbox.is-compact #closeImage{top:8px;right:10px}
.lightbox.is-compact .image-percent{width:40px}
.lightbox.is-compact .image-caption{font-size:12px;min-height:44px;line-height:44px;padding-right:56px}
.lightbox.is-long.is-compact .image-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:100%;max-width:320px;justify-self:center}
.lightbox.is-long.is-compact .image-controls .image-icon{justify-self:center;width:44px}
.lightbox.is-long.is-compact .image-percent{justify-self:center}
@media(max-width:600px){
 .lightbox{width:calc(100vw - 16px);height:min(300px,calc(100dvh - 24px));max-width:calc(100vw - 16px);max-height:calc(100dvh - 24px);border-radius:9px}
 .image-toolbar{grid-template-columns:minmax(0,1fr);gap:8px;padding:8px 10px}
 .image-caption{font-size:12px;min-height:44px;line-height:44px;padding-right:56px}
 .image-controls{grid-column:1/-1;grid-row:2;justify-content:center}
 .lightbox #closeImage{top:8px;right:10px}
 .image-percent{width:40px}
 .image-help{font-size:11px;padding:9px 10px}
 .image-help-desktop{display:none}
 .image-help-mobile{display:inline}
}

[hidden]{display:none!important}.docs-skip{position:fixed;left:16px;top:-80px;z-index:100;padding:12px 18px;background:var(--bg);color:var(--accent);border:2px solid var(--accent);border-radius:6px}.docs-skip:focus{top:10px}main:focus{outline:none}.heading-anchor{font-size:.8em;margin-left:10px;opacity:0;font-weight:400}.article-body h2:hover .heading-anchor,.article-body h3:hover .heading-anchor,.heading-anchor:focus-visible{opacity:1}.result.selected{background:var(--tint);box-shadow:inset 3px 0 var(--accent)}.docs-footer{display:flex;flex-wrap:wrap;gap:20px;padding:22px 60px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.guide-introduction{margin-top:32px;border-top:1px solid var(--line);padding-top:20px}.guide-introduction summary{cursor:pointer;font-weight:600;color:var(--accent)}.guide-introduction .article-body{margin-top:20px}.sidebar-backdrop{position:fixed;inset:72px 0 0;background:#0007;z-index:17}.empty{padding:24px;color:var(--muted)}@media(max-width:760px){.sidebar{z-index:18}.sidebar-backdrop{top:62px}.docs-footer{padding:20px 22px}}

/* Standalone section breaks use the same divider as heading borders. */
.article-body hr{height:0;border:0;border-top:1px solid var(--line);margin:28px 0}