:root{
    --bg:#f4f6f8;
    --panel:#fff;
    --line:#dce3ea;
    --line-soft:#edf1f5;
    --text:#172033;
    --muted:#667085;
    --dark:#0f172a;
    --blue:#0b93ad;
    --blue-dark:#087d94;
    --radius:6px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:15px}
.topbar{height:64px;position:sticky;top:0;z-index:20;background:var(--dark);display:flex;align-items:center;gap:16px;padding:0 22px;color:#fff;box-shadow:0 2px 10px rgba(15,23,42,.18)}
.brand{font-size:18px;font-weight:750;color:#fff;text-decoration:none}
.topTitle{color:#cbd5e1}
.searchForm{margin-left:auto;display:flex;gap:7px;width:min(520px,50vw)}
.searchForm input{flex:1;min-width:0;border:1px solid #334155;background:#fff;color:var(--text);border-radius:5px;padding:9px 11px;outline:none}
.searchForm button{border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:5px;padding:9px 13px;cursor:pointer;font-weight:600}
.layout{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 64px)}
.helpSidebar{background:#fff;border-right:1px solid var(--line);padding:16px 12px;overflow:auto;position:sticky;top:64px;height:calc(100vh - 64px)}
.mobileSidebarHead{display:none}
.navChapter{margin-bottom:18px}
.navChapterTitle{font-weight:750;color:#101828;padding:8px 9px}
.navSubchapter{margin-top:4px}
.navSubchapterTitle{font-size:12px;color:#667085;font-weight:700;text-transform:uppercase;letter-spacing:.03em;padding:7px 9px 4px}
.navArticle{display:block;color:#344054;text-decoration:none;padding:8px 10px;border-radius:5px;margin:2px 0;line-height:1.35}
.navArticle:hover,.navArticle.active{background:#eef6f8;color:var(--blue-dark)}
.content{min-width:0;padding:28px}
.article,.emptyCard,.searchResult{max-width:980px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.article{padding:30px}
.breadcrumbs{display:flex;gap:7px;flex-wrap:wrap;color:var(--muted);font-size:13px;margin-bottom:10px}
.article h1{font-size:32px;line-height:1.2;margin:0 0 16px;letter-spacing:-.025em}
.excerpt{background:#f8fafc;border-left:4px solid var(--blue);padding:13px 15px;margin:0 0 24px;color:#475467;line-height:1.6}
.articleBody{line-height:1.75;font-size:16px;overflow-wrap:anywhere}
.articleBody h2{font-size:25px;margin:30px 0 10px}
.articleBody h3{font-size:20px;margin:24px 0 8px}
.articleBody p{margin:10px 0}
.articleBody img{display:block;max-width:100%;height:auto;margin:20px auto;border-radius:5px;border:1px solid var(--line-soft)}
.articleBody a{color:var(--blue-dark);text-underline-offset:2px}
.articleBody pre{background:#0f172a;color:#e2e8f0;border-radius:5px;padding:15px;overflow:auto}
.articleBody code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.articleBody blockquote{margin:18px 0;padding:9px 16px;border-left:4px solid #cbd5e1;background:#f8fafc;color:#475467}
.articleBody table{width:100%;border-collapse:collapse;display:block;overflow:auto}
.articleBody th,.articleBody td{border:1px solid var(--line);padding:9px 10px}
.articleBody th{background:#f8fafc}
.attachments{margin-top:30px;padding-top:22px;border-top:1px solid var(--line)}
.attachments h2{font-size:20px;margin:0 0 12px}
.fileLink{display:flex;align-items:center;gap:11px;border:1px solid var(--line);border-radius:5px;padding:11px 12px;margin-top:8px;text-decoration:none;color:var(--text)}
.fileLink:hover{border-color:#b8dce3;background:#f8fcfd}
.fileIcon{width:38px;height:38px;display:flex;align-items:center;justify-content:center;background:#eef6f8;border-radius:5px}
.fileInfo{display:flex;flex-direction:column;min-width:0;flex:1}
.fileInfo strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fileInfo small{color:var(--muted);margin-top:2px}
.downloadText{color:var(--blue-dark);font-weight:650}
.articleUpdated{margin-top:26px;padding-top:14px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--muted)}
.searchHead{max-width:980px;margin:0 auto 14px;display:flex;justify-content:space-between;align-items:flex-end;gap:15px}
.searchHead h1{margin:0 0 4px}
.searchHead p{margin:0;color:var(--muted)}
.clearSearch{color:var(--blue-dark)}
.searchResults{max-width:980px;margin:0 auto;display:grid;gap:10px}
.searchResult{display:block;padding:18px;text-decoration:none;color:var(--text)}
.searchResult:hover{border-color:#b8dce3;box-shadow:0 4px 16px rgba(15,23,42,.06)}
.searchResult h2{margin:4px 0 6px;font-size:20px}
.searchResult p{margin:0;color:#475467}
.searchPath{font-size:12px;color:var(--blue-dark)}
.emptyCard{padding:40px;text-align:center}
.empty{padding:20px;color:var(--muted)}
.openMenuBtn{display:none}
.sidebarOverlay{display:none}
@media(max-width:850px){
    .topbar{height:auto;min-height:64px;flex-wrap:wrap;padding:10px 12px}
    .topTitle{display:none}
    .searchForm{order:3;width:100%;margin-left:0}
    .layout{display:block;min-height:0}
    .helpSidebar{position:fixed;left:-320px;top:0;z-index:50;width:300px;height:100vh;transition:left .2s ease;box-shadow:10px 0 30px rgba(15,23,42,.22)}
    .helpSidebar.open{left:0}
    .mobileSidebarHead{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;padding:4px 7px 10px;border-bottom:1px solid var(--line)}
    .mobileSidebarHead button{border:0;background:transparent;font-size:26px}
    .content{padding:12px}
    .article{padding:19px}
    .article h1{font-size:26px}
    .openMenuBtn{display:inline-flex;border:1px solid var(--line);background:#fff;padding:8px 10px;border-radius:5px;margin-bottom:10px}
    .sidebarOverlay{position:fixed;inset:0;background:rgba(15,23,42,.35);z-index:40}
    .sidebarOverlay.show{display:block}
}
.articleStats{
    display:flex;
    align-items:center;
    gap:8px;
    flex-wrap:wrap;
    margin:-6px 0 18px 0;
}

.articleStatItem{
    display:inline-flex;
    align-items:center;
    gap:5px;
    padding:5px 9px;
    color:#667085;
    background:#f8fafc;
    border:1px solid #edf1f5;
    border-radius:999px;
    font-size:12px;
    line-height:1.2;
    font-variant-numeric:tabular-nums;
}