@charset "UTF-8";
:root{color-scheme:light;--bg:#f6f8fc;--surface:#fff;--soft:#edf2fa;--ink:#192b45;--muted:#5b6d85;--line:#dce4ef;--accent:#285fda;--accent-soft:#eaf1ff;--side:#0f2038;--side-ink:#c8d5e8;--shadow:0 18px 60px #132d5224;--header:64px;--sidebar:256px;--toc:224px;font:15px/1.65 "Segoe UI",Arial,sans-serif}
html[data-theme=dark]{color-scheme:dark;--bg:#0d1727;--surface:#132139;--soft:#192a45;--ink:#e2ebf8;--muted:#a8b9d0;--line:#2b3d59;--accent:#8db4ff;--accent-soft:#1b345d;--side:#0a1424;--side-ink:#c0cfe4;--shadow:0 18px 60px #0005}
*{box-sizing:border-box}html{scroll-padding-top:85px}body{margin:0;background:var(--bg);color:var(--ink)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button,a,input,summary{touch-action:manipulation}:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button{cursor:pointer}button:disabled{cursor:default}h1,h2,h3,h4,p{margin-top:0}h1,h2,h3,h4{line-height:1.25;letter-spacing:-.025em}h1{font-size:clamp(28px,3vw,40px);margin-bottom:22px}h2{font-size:23px}h3{font-size:18px}.skip{position:fixed;top:8px;left:10px;z-index:100;transform:translateY(-150%);background:var(--surface);padding:10px 16px;border:2px solid var(--accent);border-radius:5px}.skip:focus{transform:none}
.topbar{position:fixed;inset:0 0 auto;height:var(--header);z-index:30;display:flex;align-items:center;gap:28px;padding:0 24px;background:var(--surface);border-bottom:1px solid var(--line)}.brand{min-width:calc(var(--sidebar) - 24px);display:flex;align-items:center;gap:10px}.brand>a{display:flex;gap:10px;align-items:center;color:var(--ink)}.brand>a:hover{text-decoration:none}.brand strong{font-size:19px;letter-spacing:-.03em}.brand strong span{font-weight:400;color:var(--muted)}.brand-mark{width:30px;height:30px;display:grid;place-items:center;background:#255ddb;color:white;border-radius:8px;font-weight:750;font-size:20px}.version{font-size:11px;line-height:22px;padding:0 6px;border:1px solid var(--line);border-radius:5px;color:var(--muted);white-space:nowrap}.icon-button{display:grid;place-items:center;width:36px;height:36px;flex:none;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--ink);font-size:20px}.menu-toggle{display:none}.search-open{max-width:440px;flex:1;display:flex;align-items:center;justify-content:space-between;gap:12px;border:1px solid var(--line);border-radius:7px;background:var(--bg);height:36px;padding:0 12px;color:var(--muted);font-size:13px;text-align:left}.search-open kbd{font:11px "Segoe UI",sans-serif;border:1px solid var(--line);border-radius:4px;padding:0 4px;white-space:nowrap}.top-actions{margin-left:auto;display:flex;align-items:center;gap:18px;font-size:13px}.top-actions a{color:var(--muted)}
.sidebar{position:fixed;z-index:25;inset:var(--header) auto 0 0;width:var(--sidebar);overflow-y:auto;overscroll-behavior:contain;background:var(--side);color:var(--side-ink);padding:24px 14px 30px;scrollbar-width:thin;scrollbar-color:#4c607d transparent;font-size:13px}.sidebar a{color:inherit}.nav-home{display:block;padding:8px 12px;margin-bottom:20px;color:#fff!important;font-weight:650}.sidebar details{margin:0 0 15px}.sidebar summary{display:flex;justify-content:space-between;align-items:center;padding:6px 12px;color:#e4ecf8;font-weight:650;cursor:pointer;list-style:none}.sidebar summary::before{content:'\25be';font-size:10px;margin-right:8px}.sidebar details:not([open]) summary::before{content:'\25b8'}.sidebar summary span{margin-left:auto;font-size:10px;font-weight:500;color:#9bb2cf}.sidebar ul{padding:4px 0 0;margin:0;list-style:none}.sidebar li a{display:block;padding:7px 12px 7px 27px;border-left:2px solid transparent;border-radius:5px;line-height:1.45;overflow-wrap:anywhere}.sidebar li a:hover{background:#ffffff0b;text-decoration:none;color:white}.sidebar li a[aria-current=page]{background:#294b77;color:#fff;border-color:#83adff}.sidebar-footer{margin:26px 12px 0;padding-top:20px;border-top:1px solid #ffffff1c;color:#9eb1cb;font-size:11px;line-height:1.8}.sidebar-footer strong{color:#d5e2f2}.sidebar-footer a{display:block;margin-top:9px}
#main{margin:var(--header) var(--toc) 0 var(--sidebar);min-width:0;padding:40px 48px 60px;min-height:calc(100vh - var(--header))}.article{max-width:850px;margin:auto}.breadcrumbs{display:flex;flex-wrap:wrap;gap:9px;font-size:12px;color:var(--muted);margin-bottom:24px}.article-meta{display:flex;gap:14px;color:var(--muted);font-size:12px;margin-bottom:12px}.article-meta>span:first-child{font-weight:650;color:var(--accent)}.article-tools{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin:0 0 30px;padding-bottom:26px;border-bottom:1px solid var(--line);font-size:13px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:7px 12px;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--ink);font-size:13px;font-weight:600;line-height:1.4;max-width:100%;text-align:center}.button:hover{border-color:var(--accent);text-decoration:none}.button.primary{background:#285fda;color:white;border-color:#285fda}.prose{overflow-wrap:anywhere}.prose p{margin-bottom:18px}.prose h2{margin:42px 0 18px;padding-top:6px}.prose h3{margin:30px 0 14px}.prose h4{margin:24px 0 10px}.prose li{margin:5px 0}.prose li p{margin:6px 0 10px}.prose ul,.prose ol{padding-left:25px;margin:0 0 22px}.prose a{text-decoration:underline;text-underline-offset:3px}.prose blockquote{margin:24px 0;padding:15px 18px;background:var(--accent-soft);border-left:3px solid var(--accent);border-radius:0 6px 6px 0;color:var(--ink)}.prose blockquote p:last-child{margin-bottom:0}.prose code{font:12.5px/1.5 Consolas,"Courier New",monospace;background:var(--soft);padding:2px 5px;border-radius:4px;color:var(--ink);word-break:break-word}.prose pre{position:relative;overflow:auto;max-width:100%;padding:42px 17px 17px;border:1px solid var(--line);border-radius:8px;background:var(--side);color:#dce8f8;tab-size:2;scrollbar-width:thin}.prose pre code{font-size:12px;background:none;color:inherit;padding:0;white-space:pre;word-break:normal}.copy-code{position:absolute;right:8px;top:8px;background:#203953;color:#dce8f8;border:1px solid #55728e;border-radius:5px;padding:3px 9px;font-size:11px}.table-scroll{max-width:100%;overflow:auto;margin:22px 0;border:1px solid var(--line);border-radius:7px;scrollbar-width:thin}.table-scroll table{width:100%;min-width:560px;border-collapse:collapse;font-size:13px;line-height:1.5}.table-scroll th{text-align:left;background:var(--soft);font-size:12px;font-weight:650;white-space:normal}.table-scroll td,.table-scroll th{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top;min-width:110px}.table-scroll tr:last-child td{border-bottom:0}.table-scroll td code{font-size:11.5px}.page-navigation{display:flex;gap:12px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}.page-navigation a{flex:1;min-width:0;border:1px solid var(--line);padding:12px 16px;border-radius:8px;background:var(--surface);color:var(--ink)}.page-navigation a:last-child{text-align:right}.page-navigation small{display:block;color:var(--muted);font-size:11px}.page-navigation strong{font-size:13px}.article-footer{font-size:11px;color:var(--muted);border-top:1px solid var(--line);margin-top:28px;padding-top:18px}
.toc{position:fixed;inset:calc(var(--header) + 40px) 24px 30px auto;width:calc(var(--toc) - 38px);overflow:auto;font-size:12px;scrollbar-width:thin}.toc>strong{font-size:11px;letter-spacing:.06em;text-transform:uppercase}.toc ol{list-style:none;margin:14px 0 20px;padding:0;border-left:1px solid var(--line)}.toc li a{display:block;padding:6px 0 6px 14px;color:var(--muted);line-height:1.5}.toc .level-3 a{font-size:11px;padding-left:24px}.back-top{display:block;font-size:11px;padding:12px 0;border-top:1px solid var(--line)}body:has(.home) #main{margin-right:0}.home{max-width:1160px;margin:auto}.hero{padding:12px 0 28px}.eyebrow{font-size:11px;font-weight:750;letter-spacing:.08em;color:var(--accent)}.hero h1{font-size:clamp(30px,3.5vw,48px);line-height:1.15;letter-spacing:-.045em;margin:20px 0}.hero>p{color:var(--muted);font-size:17px;max-width:690px;line-height:1.65}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin:25px 0 32px}.hero-actions .button{min-height:40px}.journey{display:flex;gap:18px;align-items:center;padding:22px 26px;background:var(--surface);border:1px solid var(--line);border-radius:10px;max-width:900px}.journey>div{flex:1}.journey small{font-size:9px;font-weight:700;letter-spacing:.1em;color:var(--muted)}.journey strong{display:block;font-size:18px;margin:2px 0}.journey div>span{display:block;font-size:12px;color:var(--muted)}.journey>span{color:var(--accent);font-size:20px}.start-note{padding:22px 0 26px;border-bottom:1px solid var(--line);margin-bottom:28px}.start-note>strong{font-size:18px}.start-note p{max-width:890px;margin:8px 0 0;color:var(--muted);font-size:14px}.chapters{display:grid;grid-template-columns:1fr 1fr;gap:22px}.chapter-card{border:1px solid var(--line);border-radius:10px;padding:24px;background:var(--surface)}.card-heading{display:flex;gap:12px;align-items:center;justify-content:space-between}.card-heading h2{font-size:22px;margin:0}.card-heading span{font-size:11px;color:var(--muted);white-space:nowrap}.chapter-card>p{color:var(--muted);font-size:13px;margin:12px 0 18px}.chapter-card ul{list-style:none;padding:0;margin:0}.chapter-card li a{display:block;padding:7px 0;color:var(--ink);font-size:13px;border-top:1px solid var(--line)}.chapter-card li a:hover{color:var(--accent)}
#search-dialog{width:min(680px,calc(100vw - 24px));max-height:calc(100dvh - 40px);padding:22px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);background:var(--surface);color:var(--ink);overflow:auto}#search-dialog::backdrop{background:#06122799}.search-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.search-heading h2{margin:0;font-size:21px}.search-label{display:block;font-size:12px;color:var(--muted);margin-bottom:5px}#search-input{width:100%;height:44px;padding:9px 12px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink)}#search-status,.search-help{font-size:12px;color:var(--muted);margin:12px 0}#search-results{list-style:none;padding:0;margin:0}#search-results a{display:block;padding:12px;border:1px solid var(--line);border-radius:7px;margin:8px 0;color:var(--ink)}#search-results a:hover{background:var(--soft);text-decoration:none}#search-results small{display:block;font-size:10px;color:var(--accent);font-weight:650}#search-results strong{display:block;font-size:14px}#search-results p{font-size:12px;margin:5px 0 0;color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
@media(min-width:1800px){:root{--sidebar:276px;--toc:270px}#main{padding-inline:70px}.article{max-width:940px}}
@media(max-width:1199px){:root{--toc:0px}.toc{display:none}#main{padding:32px}.brand{min-width:208px}.topbar{gap:18px}.hero h1{font-size:38px}}
@media(max-width:860px){:root{--header:60px;--sidebar:276px}.topbar{padding:0 12px;gap:10px}.brand{min-width:0;gap:8px}.brand strong{font-size:17px}.brand-mark{display:none}.menu-toggle{display:grid}.version{display:none}.top-actions{gap:8px}.top-actions>a{display:none}.search-open{margin-left:auto;max-width:250px}.search-open kbd{display:none}.sidebar{transform:translateX(-100%);box-shadow:var(--shadow)}body.nav-open .sidebar{transform:none}body.nav-open{overflow:hidden}#nav-shade:not([hidden]){position:fixed;inset:var(--header) 0 0;z-index:24;background:#07142788}#main,body:has(.home) #main{margin-left:0;padding:25px 20px 40px}.chapters{gap:14px}.chapter-card{padding:19px}.journey{gap:10px;padding:18px}.journey div>span{font-size:11px}.hero>p{font-size:15px}.icon-button,.search-open{min-height:44px}.icon-button{width:44px}.sidebar li a{min-height:44px;display:flex;align-items:center}.article-tools .button{min-height:44px}}
@media(max-width:540px){:root{font-size:14px}.topbar{gap:8px}.brand strong{font-size:15px}.search-open{font-size:11px;padding-inline:9px;width:115px;max-width:150px;flex:1}.icon-button{width:44px;min-height:44px}.top-actions{margin-left:0}#main,body:has(.home) #main{padding:22px 16px 36px}.hero{padding-top:2px}.hero h1{font-size:31px}.hero h1 br{display:none}.eyebrow{font-size:9px}.chapters{grid-template-columns:1fr}.journey{flex-direction:column;align-items:stretch;gap:12px;padding:18px}.journey>span{transform:rotate(90deg);align-self:center;line-height:1}.journey>div{display:grid;grid-template-columns:1fr 1fr;align-items:center}.journey small{grid-column:1/-1}.journey strong{font-size:17px}.journey div>span{text-align:right}.hero-actions{margin-bottom:22px}.hero-actions .button{min-height:44px;flex:1}.card-heading h2{font-size:20px}.article h1{font-size:28px}.article-tools{gap:12px}.article-tools .button{width:100%}.breadcrumbs{margin-bottom:20px}.prose h2{font-size:21px}.prose h3{font-size:17px}.prose ul,.prose ol{padding-left:21px}.prose pre code{font-size:11px}.page-navigation{gap:8px}.page-navigation a{padding:10px}.page-navigation strong{font-size:12px}.chapter-card li a,.sidebar li a{padding-block:10px}.sidebar summary{min-height:40px}#search-dialog{padding:16px}.search-heading h2{font-size:18px}}
@media(prefers-reduced-motion:no-preference){a,button{transition:background-color .14s,color .14s,border-color .14s}.sidebar{transition:transform .18s ease}html{scroll-behavior:smooth}}
@media print{:root,html[data-theme=dark]{color-scheme:light;--bg:#fff;--surface:#fff;--soft:#edf2f9;--ink:#172b46;--muted:#4c5f76;--line:#d4dce8;--accent:#174aa3;--accent-soft:#edf3ff}@page{size:A4;margin:16mm}html{font-size:10pt}body{background:white!important;color:#172b46!important;overflow:visible!important}.topbar,.sidebar,.toc,.article-tools,.page-navigation,.copy-code,.skip,#search-dialog,#nav-shade,.article-footer,.hero-actions{display:none!important}#main,body:has(.home) #main{margin:0!important;padding:0!important;min-height:0}.article,.home{max-width:none}.article h1{font-size:25pt}.prose h2{font-size:16pt;margin-top:22pt}.prose h3{font-size:12pt}h1,h2,h3,h4{break-after:avoid}.prose p,.prose li{orphans:3;widows:3}a{color:#174aa3!important}.prose pre{white-space:pre-wrap;background:#f0f3f8!important;color:#172b46!important;border-color:#d4dce8;padding:10pt;break-inside:auto}.prose pre code{white-space:pre-wrap;font-size:8pt;overflow-wrap:anywhere}.table-scroll{overflow:visible;border:0;border-radius:0}.table-scroll table{min-width:0;font-size:8pt;table-layout:fixed}.table-scroll th,.table-scroll td{min-width:0;padding:6pt;border:1px solid #d4dce8;overflow-wrap:anywhere}.table-scroll tr{break-inside:avoid}.table-scroll th{background:#edf2f9!important}thead{display:table-header-group}.breadcrumbs{font-size:8pt}.chapters{display:block}.chapter-card{break-inside:avoid;margin:12pt 0}.journey{break-inside:avoid}.article-meta{font-size:8pt}}