:root{--bn-blue:#0055f5;--bn-ink:#081650;--bn-muted:#4d6086;--bn-line:#dfebf8}html{scroll-padding-top:100px}body{padding-top:0!important}.bn-skip{position:fixed;top:-80px;left:20px;z-index:99999;background:#fff;padding:12px}.bn-skip:focus{top:8px}#main-header-container{position:sticky;top:0;z-index:6000;background:#fff;border-bottom:1px solid var(--bn-line)}.bn-header{width:100%;max-width:1350px;margin:auto;min-height:84px;padding:12px 24px;display:flex;align-items:center;gap:26px;color:var(--bn-ink);font-family:Arial,sans-serif}.bn-brand{display:flex;align-items:center;gap:8px;flex-shrink:0;text-decoration:none!important;font-size:26px;font-weight:800;letter-spacing:-1px}.bn-brand img{width:46px;height:46px}.bn-brand small{display:block;font-size:10px;letter-spacing:0;font-weight:400;margin-top:4px}.bn-header nav{display:flex;align-items:center;gap:20px;flex:1}.bn-header nav>a,.bn-dropdown summary{font-size:14px;white-space:nowrap;text-decoration:none;padding:12px 0;cursor:pointer}.bn-header a:hover{color:var(--bn-blue)}.bn-dropdown{position:relative}.bn-dropdown summary{list-style:none}.bn-dropdown summary{display:flex;align-items:center;gap:7px;min-height:44px}.bn-chevron{flex:none;color:var(--bn-blue);transition:transform .15s ease}.bn-dropdown[open] .bn-chevron{transform:rotate(180deg)}.bn-icon{flex:none;display:block}.bn-brand>span{line-height:1.15;white-space:nowrap}.bn-brand img{flex:none}.bn-panel-icon .bn-icon{width:32px;height:32px}.bn-dropdown summary::-webkit-details-marker{display:none}.bn-dropdown>div{position:absolute;top:100%;left:-16px;min-width:260px;background:#fff;border:1px solid var(--bn-line);border-radius:12px;padding:8px;box-shadow:0 12px 30px #17366519}.bn-dropdown>div>a{display:block;padding:13px 10px;font-size:14px;border-radius:7px}.bn-dropdown>div>a:hover{background:#eef6ff}.bn-search{display:flex;background:#f2f7ff;border:1px solid #cfe0fc;border-radius:9px;margin-left:auto;min-width:130px;max-width:230px}.bn-search input{min-width:0;width:100%;background:transparent;border:0;padding:12px;color:var(--bn-ink);font-size:13px}.bn-search button{font-size:25px;min-width:40px}.bn-button{display:inline-flex!important;align-items:center;justify-content:center;gap:8px;background:var(--bn-blue)!important;color:#fff!important;border-radius:9px;padding:14px 18px!important;font-size:14px!important;font-weight:700;text-decoration:none!important;min-height:44px}.bn-menu-toggle{display:none}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #0055f5;outline-offset:3px}.bn-reader{background:linear-gradient(#f6faff 0,#fff 450px)!important;color:var(--bn-ink);font-family:Arial,sans-serif!important}.bn-reader .bn-main{padding:28px 24px 60px!important;width:100%;max-width:1300px;margin:auto}.bn-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:34px;align-items:start}.bn-reader .bn-article{min-width:0;padding:0!important;border:0!important;border-radius:0!important;box-shadow:none!important;background:transparent!important;overflow:visible!important;max-width:none!important}.bn-reader .ux-article-header{padding:0!important;margin:0 0 20px!important;background:none!important;border:0!important}.bn-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;color:var(--bn-muted);font-size:12px;margin-bottom:20px;line-height:1.6}.bn-breadcrumb span:last-child{max-width:100%}.bn-reader .ux-eyebrow{display:none}.bn-reader .ux-article h1{font-family:Arial,sans-serif!important;font-size:42px!important;line-height:1.13!important;font-weight:800!important;letter-spacing:-1.2px!important;color:var(--bn-ink)!important;margin:0 0 12px!important}.bn-reader .ux-lead{font-size:18px!important;line-height:1.5!important;color:var(--bn-muted)!important;max-width:760px}.bn-reader .ux-meta{font-size:12px!important;display:flex;flex-wrap:wrap;gap:12px;color:var(--bn-muted);margin:16px 0 8px}.bn-reader .ux-meta>span{background:none!important;border:0!important;padding:0 12px 0 0!important;border-right:1px solid var(--bn-line)!important}.bn-reader .ux-method-link{font-size:12px;color:var(--bn-muted)}.bn-reader .bn-article-image{margin:20px 0!important;background:#f0f7ff;border-radius:9px;overflow:hidden}.bn-reader .bn-article-image img{width:100%;height:auto!important;max-height:none!important;object-fit:contain!important}.bn-reader .ux-article p,.bn-reader .ux-article li{color:var(--bn-muted);font-size:16px;line-height:1.7}.bn-reader .ux-article h2{font-family:Arial,sans-serif!important;font-size:27px!important;line-height:1.25!important;color:var(--bn-ink)!important;letter-spacing:-.5px!important;margin:28px 0 12px!important;text-transform:none!important;scroll-margin-top:110px}.bn-reader .ux-article h3{font-family:Arial,sans-serif!important;color:var(--bn-ink)!important;font-size:20px!important;scroll-margin-top:110px}.bn-reader .ux-article section{border-radius:10px!important;box-shadow:none!important}.bn-reader .ux-article a{color:#0050d8}.bn-reader .ux-table-scroll{overflow:auto;max-width:100%;border:1px solid var(--bn-line);border-radius:8px}.bn-reader table{font-size:14px!important;width:100%;border-collapse:collapse}.bn-reader th{background:#eaf3fc!important;color:var(--bn-ink)!important}.bn-reader td,.bn-reader th{padding:10px 12px!important;border:1px solid #dfebf8}.bn-reader .bn-sidebar{min-width:0;display:grid;gap:18px;top:104px;scrollbar-width:thin;padding:1px 4px 8px 0}.bn-toc,.bn-related,.bn-source-note{background:#fff;border:1px solid var(--bn-line);border-radius:10px;padding:20px}.bn-toc summary{font-size:20px;font-weight:800;cursor:pointer;color:var(--bn-ink)}.bn-toc ol{list-style:none;counter-reset:toc;padding:0;margin:12px 0 0;display:grid;gap:4px}.bn-toc li{counter-increment:toc;display:flex;align-items:baseline;gap:10px;font-size:13px;line-height:1.5}.bn-toc li:before{content:counter(toc);background:var(--bn-blue);color:white;flex-shrink:0;border-radius:100%;width:23px;line-height:23px;text-align:center;font-size:12px}.bn-toc a{padding:7px 0;color:var(--bn-ink);display:block;text-decoration:none}.bn-toc a:hover{text-decoration:underline}.bn-calc-panel{padding:24px;background:linear-gradient(155deg,#dbeeff,#f1f8ff 70%);border-radius:10px}.bn-panel-icon{font-size:34px;color:var(--bn-blue)}.bn-sidebar h2{font-family:Arial,sans-serif;font-size:21px;font-weight:800;line-height:1.3;margin:12px 0 8px;color:var(--bn-ink)}.bn-sidebar p{font-size:14px;line-height:1.5;color:var(--bn-muted);margin:8px 0 14px}.bn-calc-panel .bn-button{width:100%}.bn-related>a{display:flex;gap:10px;align-items:center;padding:10px 0;color:var(--bn-ink);font-size:13px;line-height:1.4}.bn-related img{width:76px;height:56px;object-fit:contain;border-radius:6px;background:#eff6ff;flex-shrink:0}.bn-related b{margin-left:auto;color:var(--bn-blue)}.bn-source-note{font-size:13px}.bn-source-note strong{color:var(--bn-ink)}.bn-source-note a{color:var(--bn-blue)}.bn-reader footer{margin-top:30px}.dark #main-header-container,.dark .bn-header,.dark .bn-dropdown>div{background:#101c36;color:#e3edff}.dark .bn-search{background:#182742}.dark .bn-search input{color:white}
@media(min-width:1201px){.bn-dropdown:hover>div{display:block}.bn-dropdown:not([open]):hover>div{display:block}.bn-dropdown:not([open])>div{display:none}}
@media(max-width:1200px){.bn-header{justify-content:space-between;flex-wrap:wrap;gap:0;min-height:72px}.bn-brand{font-size:24px}.bn-menu-toggle{display:block;padding:12px;border:1px solid #dce9fa;border-radius:8px;min-height:44px}.bn-header nav{display:none;width:100%;flex-basis:100%;padding:14px 0;max-height:calc(100dvh - 100px);overflow:auto;align-items:stretch;gap:4px}.bn-header nav.is-open{display:flex;flex-direction:column}.bn-header nav>a,.bn-dropdown summary{padding:13px 10px;min-height:44px}.bn-dropdown>div{position:static;box-shadow:none;border:0;border-left:2px solid #dce9fa;border-radius:0;margin-left:14px}.bn-search{max-width:none;width:100%;margin:8px 0}.bn-article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:24px}.bn-reader .ux-article h1{font-size:36px!important}}
@media(max-width:900px){.bn-article-layout{display:block}.bn-reader .bn-sidebar{position:static;max-height:none;overflow:visible;margin-top:28px;padding:0;grid-template-columns:1fr 1fr}.bn-reader .bn-main{padding:20px 20px 40px!important}.bn-toc{margin:16px 0}.bn-sidebar>.bn-toc{grid-column:1/-1}.bn-source-note{grid-column:1/-1}.bn-reader .ux-article h1{font-size:36px!important}.bn-toc summary{min-height:30px}.bn-toc a{min-height:40px}}
@media(max-width:540px){.bn-header{padding:10px 16px}.bn-brand{font-size:23px}.bn-brand small{font-size:9px}.bn-brand img{width:38px;height:38px}.bn-reader .bn-main{padding:18px 16px 36px!important}.bn-reader .ux-article h1{font-size:30px!important;letter-spacing:-.7px!important}.bn-reader .ux-lead{font-size:17px!important}.bn-reader .ux-article h2{font-size:24px!important}.bn-reader .bn-sidebar{grid-template-columns:1fr}.bn-reader .ux-article section{padding:16px!important}.bn-reader .ux-article .bn-article-image{margin-left:0!important;margin-right:0!important}.bn-reader .ux-article p,.bn-reader .ux-article li{overflow-wrap:anywhere}.bn-breadcrumb{font-size:11px}.bn-toc{padding:16px}}

.bn-reader main::before,.bn-reader main::after{display:none!important}.bn-reader main{background:none!important}.bn-reader .bn-article-image img{max-height:420px!important}.bn-reader .bn-brief{background:#edf6ff!important;border:1px solid #dcebfd!important;border-left:3px solid #bad8ff!important;padding:16px 20px!important;margin:18px 0!important}.bn-brief strong{color:#0055f5;font-size:17px}.bn-reader .bn-brief li{font-size:14px;line-height:1.55;margin:6px 0}.bn-brief ul{padding-left:20px;margin-top:8px}.bn-reader .bn-sidebar .bn-toc{max-height:390px;overflow:auto}.bn-reader .bn-sidebar{position:static;max-height:none;overflow:visible}.bn-reader .bn-breadcrumb span:last-child{display:none}.bn-reader .ux-lead{line-height:1.5!important}.bn-reader .ux-article-header .ux-method-link{display:inline-block;margin-top:0!important}.bn-reader .ux-article-header .ux-meta{margin:12px 0 6px!important}
@media(max-width:900px){.bn-reader .bn-article-image img{max-height:none!important}.bn-reader .bn-sidebar .bn-toc{max-height:none}}

.bn-theme-toggle{display:block;padding:12px 18px;margin:16px auto;border:1px solid #cbd8ee;border-radius:8px;min-height:44px}.bn-reader .bn-brief ul{list-style:disc}.bn-reader .ux-article li::marker{color:#0055f5}