@layer reset, base, layout, components, article, responsive;
@layer reset {
  *,*::before,*::after{box-sizing:border-box}body,h1,h2,h3,p{margin:0}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}img,svg{max-width:100%}button{cursor:pointer}a{color:inherit;text-decoration:none}
}
@layer base {
  :root{color-scheme:light;--ink:#273348;--muted:#657185;--pink:#bc245d;--pink-hover:#9d164a;--tint:#fcebf2;--line:#e5e8ee;--paper:#fff;--back:#f8f9fc;--blue:#256b84;--sidebar:250px;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"PingFang TC","Microsoft JhengHei",sans-serif;font-size:16px;line-height:1.65}
  body{background:var(--paper);color:var(--ink)}::selection{background:#f8cedf}h1,h2,h3{line-height:1.4;letter-spacing:-.025em}h1{font-size:34px;font-weight:750}h2{font-size:24px}h3{font-size:18px}a,button{transition:background-color .15s,color .15s,border-color .15s}a:hover{color:var(--pink)}:focus-visible{outline:3px solid #287b9d;outline-offset:4px;border-radius:4px}button{color:inherit}button:disabled{cursor:default}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}kbd{font:12px ui-monospace,monospace;border:1px solid #dfe3ea;background:#fff;border-radius:5px;padding:2px 5px;color:var(--muted)}[hidden]{display:none!important}html{scroll-padding-top:95px}.muted{color:var(--muted)}.small{font-size:14px}.skip-link{position:fixed;left:16px;top:-100px;background:var(--ink);color:white;padding:10px 20px;z-index:100}.skip-link:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}
}
@layer layout {
  .topbar{height:76px;position:fixed;inset:0 0 auto;z-index:30;display:flex;align-items:center;gap:24px;padding:0 30px;background:#fffffff5;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:13px;min-width:195px}.wordmark{font-size:29px;font-weight:850;color:var(--pink);letter-spacing:-1.6px}.brand-divider{height:22px;border-left:1px solid #dce0e7}.brand-label{font-size:15px;font-weight:650;white-space:nowrap}.topbar-actions{margin-left:auto;display:flex;gap:20px;align-items:center}.preview-badge{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:#8f3c20;background:#fff5e9;border:1px solid #f2dfc5;border-radius:99px;padding:3px 11px;white-space:nowrap}.preview-dot{width:6px;height:6px;border-radius:50%;background:#c47e2a}.header-search{width:260px;display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:var(--back);color:var(--muted);padding:8px 12px;border-radius:9px;font-size:14px}.header-search kbd{margin-left:auto}.mobile-menu{display:none}.sidebar{position:fixed;top:76px;left:0;bottom:0;width:var(--sidebar);padding:28px 17px 24px;background:var(--back);border-right:1px solid var(--line);overflow-y:auto;z-index:25;scrollbar-width:thin}.sidebar-heading{font-size:14px;font-weight:650;color:#798393;letter-spacing:.06em;padding:0 14px;margin:28px 0 10px}.sidebar-link{display:flex;align-items:center;gap:11px;font-size:15px;padding:9px 13px;border-radius:7px;line-height:1.65}.sidebar-link:hover{background:#edf0f5}.sidebar-link[aria-current=page]{background:var(--tint);color:var(--pink);font-weight:650}.nav-num{font-size:12px;font-weight:700;color:#8490a0;font-variant-numeric:tabular-nums}.sidebar-link[aria-current=page] .nav-num{color:var(--pink)}.nav-chapter{position:relative}.nav-chapter>summary{list-style:none;cursor:pointer;position:absolute;right:6px;top:5px;width:29px;height:35px;display:grid;place-items:center;border-radius:5px;color:var(--muted)}.nav-chapter>summary::-webkit-details-marker{display:none}.nav-chapter>summary:hover{background:#e7eaf0}.nav-chapter[open]>summary svg{transform:rotate(90deg)}.chapter-head{padding-right:36px}.nav-children{border-left:1px solid #dfe3eb;margin:6px 5px 10px 24px;padding-left:10px}.nav-children .sidebar-link{font-size:14px;padding:7px 9px}.nav-children .subnav{padding-left:12px}.sidebar-foot{border-top:1px solid var(--line);margin:28px 13px 0;padding-top:18px;font-size:14px;color:var(--muted)}.sidebar-foot a{display:inline-flex;gap:6px;align-items:center;margin-top:8px}.sidebar-foot svg{width:15px;height:15px}.workspace{margin-left:var(--sidebar);padding-top:76px;min-height:100vh}.page{max-width:1180px;margin:0 auto;padding:43px 52px 50px}.page-foot{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:14px;border-top:1px solid var(--line);padding-top:24px;margin-top:50px}.page-foot a{text-decoration:underline;text-underline-offset:3px}.reading-layout{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:46px;max-width:1300px}.reading-main{min-width:0}.toc{align-self:start;position:sticky;top:106px;max-height:calc(100vh - 135px);overflow:auto;scrollbar-width:thin;font-size:14px;padding-left:18px;border-left:1px solid var(--line)}.toc-title{font-weight:650;margin-bottom:12px}.toc a{display:block;line-height:1.6;padding:6px 0;color:var(--muted);overflow-wrap:anywhere}.toc a:hover,.toc a[aria-current=true]{color:var(--pink)}.toc .depth-3{padding-left:12px}.toc .toc-top{border-top:1px solid var(--line);margin-top:18px;padding-top:14px}.mobile-toc{display:none}.breadcrumbs{display:flex;gap:7px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:14px;margin-bottom:26px}.breadcrumbs svg{width:12px;height:12px}.breadcrumbs a:hover{text-decoration:underline}.breadcrumbs span:last-child{color:var(--ink)}
}
@layer components {
  /* Keep the supplied PNG unchanged; fit its centered logo within the header. */
  .brand-logo{display:block;width:128px;height:52px;object-fit:cover;object-position:center;flex-shrink:0}
  .nav-group{position:relative}.nav-chapter{position:static}
  .eyebrow{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:650;color:var(--pink);letter-spacing:.045em;margin-bottom:12px}.home-intro{position:relative;border-bottom:1px solid var(--line);padding:0 0 34px}.home-intro h1{font-size:38px;letter-spacing:-.04em}.home-intro .lead{font-size:17px;color:var(--muted);margin:12px 0 25px;max-width:680px}.search-form{display:flex;gap:12px;align-items:center;border:1px solid #d8b6c4;border-radius:10px;background:white;box-shadow:0 5px 18px #98395209;padding:7px 7px 7px 17px}.search-form:focus-within{outline:2px solid #b32a60;outline-offset:2px}.search-form>svg{color:var(--pink);width:22px;height:22px}.search-form input{min-width:0;width:100%;border:0;padding:8px 0;outline:none;background:transparent;color:var(--ink);font-size:16px}.search-form input::placeholder{color:#7e8896}.primary-button{display:inline-flex;justify-content:center;align-items:center;gap:8px;background:var(--pink);color:white;border:1px solid var(--pink);border-radius:7px;white-space:nowrap;font-weight:600;padding:10px 21px;font-size:15px}.primary-button:hover{background:var(--pink-hover);color:white}.hot-searches{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:14px;font-size:14px;color:var(--muted)}.hot-searches a{padding:2px 8px;background:var(--back);border-radius:4px}.hot-searches a:hover{background:var(--tint)}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:15px;margin:31px 0 16px}.section-heading h2{font-size:22px}.section-heading span,.section-heading>a{font-size:14px;color:var(--muted)}.quick-start{display:flex;align-items:center;gap:18px;background:#eff6f9;border:1px solid #dcebf0;border-radius:10px;padding:22px 24px;margin-top:28px}.quick-start .quick-icon{background:white;color:var(--blue);width:48px;height:48px;border-radius:12px;display:grid;place-items:center;flex-shrink:0}.quick-start h2{font-size:18px;margin-bottom:3px}.quick-start p{font-size:15px;color:#526c7b}.quick-start>a{display:flex;align-items:center;gap:9px;margin-left:auto;color:var(--blue);font-size:15px;font-weight:650;white-space:nowrap}.module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.module-card{border:1px solid var(--line);border-radius:10px;padding:23px 24px 19px;background:white;position:relative;transition:border-color .15s,box-shadow .15s}.module-card:hover{border-color:#d8aec0;box-shadow:0 5px 15px #59344006}.module-card a::after{content:"";position:absolute;inset:0;border-radius:10px}.module-top{display:flex;align-items:center;gap:12px;margin-bottom:10px}.module-icon{display:grid;place-items:center;background:var(--tint);color:var(--pink);border-radius:9px;width:39px;height:39px;flex-shrink:0}.module-card:nth-child(4n+2) .module-icon,.module-card:nth-child(4n+3) .module-icon{background:#eef4f8;color:var(--blue)}.module-card .chapter-number{margin-left:auto;font-size:14px;color:#97a0ad;font-weight:600}.module-card p{font-size:15px;color:var(--muted);line-height:1.75;min-height:26px}.module-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:17px;font-size:14px;color:#748091}.module-bottom svg{width:17px;height:17px}.notice{border-left:3px solid #83b0c3;background:#f2f7f9;padding:15px 19px;border-radius:0 7px 7px 0;font-size:15px;color:#4e6574;margin:24px 0}.article-meta{display:flex;align-items:center;gap:13px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin:17px 0 26px}.type-tag{font-size:14px;padding:2px 9px;background:var(--tint);border-radius:5px;color:var(--pink)}.article-title{font-size:31px;overflow-wrap:anywhere}.doc-description{font-size:17px;color:var(--muted);margin-top:14px}.child-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}.child-link{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:8px;padding:17px 19px;min-width:0}.child-link:hover{border-color:#dbacc0;background:#fff9fb}.child-link>svg{color:var(--pink)}.child-link .child-copy{min-width:0}.child-link strong{display:block;font-size:16px;font-weight:600;overflow-wrap:anywhere}.child-link small{font-size:14px;color:var(--muted)}.child-link .arrow{margin-left:auto;width:16px;color:var(--muted)}.related{border-top:1px solid var(--line);padding-top:28px;margin-top:42px}.related h2{font-size:22px}.pager{display:flex;justify-content:space-between;gap:18px;margin-top:35px}.pager a{display:flex;align-items:center;gap:12px;width:50%;padding:18px;border:1px solid var(--line);border-radius:8px;font-size:15px}.pager a:last-child{text-align:right;justify-content:flex-end;margin-left:auto}.pager small{display:block;font-size:14px;color:var(--muted)}.index-section{margin-top:30px}.search-page .search-form{margin:25px 0}.results-status{font-size:14px;color:var(--muted);margin:16px 0}.results-list{list-style:none;padding:0;margin:0}.search-result{border-bottom:1px solid var(--line);padding:19px 4px}.search-result a{display:block}.search-result h3{font-size:17px;color:var(--ink)}.search-result a:hover h3{color:var(--pink)}.search-result p{font-size:15px;color:var(--muted);margin-top:6px;overflow-wrap:anywhere}.result-chapter{font-size:14px;color:var(--pink);margin-bottom:4px}.empty-state{padding:32px 0;line-height:1.9;color:var(--muted)}.empty-state strong{color:var(--ink);display:block}.icon-button{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--line);border-radius:7px;background:white}.icon-button:hover{background:var(--back)}dialog{color:var(--ink);border:1px solid var(--line);border-radius:14px;box-shadow:0 24px 70px #14213633;padding:0;max-width:calc(100vw - 32px)}dialog::backdrop{background:#17243566;backdrop-filter:blur(3px)}.search-dialog{width:720px;max-height:calc(100dvh - 64px);margin:70px auto auto}.dialog-head{display:flex;align-items:center;gap:15px;padding:18px 22px;border-bottom:1px solid var(--line);position:sticky;top:0;background:white;z-index:1}.dialog-head h2{font-size:18px;flex:1}.search-dialog .dialog-body{padding:0 24px 23px}.search-dialog .search-form{margin-top:20px}.search-dialog .search-form input{padding:8px 0}.search-dialog .search-result{padding:14px 2px}.dialog-hint{font-size:14px;color:var(--muted);margin:15px 0 2px}.image-dialog{width:min(1500px,96vw);height:94dvh;max-height:94dvh;margin:auto;background:#f4f6f9;overflow:hidden}.image-dialog .dialog-head{height:66px}.image-caption{font-size:14px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.image-frame{height:calc(100% - 66px);overflow:auto;padding:20px;display:flex;align-items:flex-start;justify-content:center}.image-frame img{width:auto;max-width:100%;height:auto;max-height:100%;object-fit:contain;margin:auto;cursor:zoom-in}.image-frame.is-zoomed{display:block}.image-frame.is-zoomed img{max-width:none;max-height:none;margin:0;cursor:zoom-out}.zoom-button{white-space:nowrap;background:white;border:1px solid var(--line);padding:6px 12px;font-size:14px;border-radius:7px}.dialog-open{overflow:hidden}
}
@layer article {
  .prose{line-height:1.95;overflow-wrap:anywhere;font-size:16px}.prose h2{font-size:24px;margin:42px 0 17px;padding-top:10px;border-top:1px solid var(--line)}.prose h2:first-child{margin-top:8px;border:0;padding-top:0}.prose h3{font-size:19px;margin:30px 0 13px}.prose h4,.prose h5,.prose h6{font-size:17px;margin:24px 0 12px}.prose p{margin:16px 0}.prose ul,.prose ol{padding-left:25px;margin:15px 0}.prose li+li{margin-top:7px}.prose a:not(.manual-image){color:var(--pink);text-decoration:underline;text-underline-offset:3px}.prose strong{font-weight:650}.prose blockquote{margin:22px 0;padding:3px 18px;background:#f2f7f9;border-left:3px solid #86adbf;color:#4a6371}.prose blockquote p{margin:12px 0}.prose hr{border:0;border-top:1px solid var(--line);margin:28px 0}.prose code{font-size:14px;background:#f1f3f7;padding:2px 5px;border-radius:3px;white-space:normal}.prose pre{padding:18px;background:#f1f3f7;overflow:auto;border-radius:8px}.prose pre code{padding:0;white-space:pre}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:8px;margin:24px 0}.prose table{width:100%;border-collapse:collapse;font-size:15px;min-width:420px}.prose td,.prose th{text-align:left;padding:12px 15px;border-bottom:1px solid var(--line)}.prose th{background:var(--back);font-weight:600}.prose tr:last-child td{border-bottom:0}.manual-image{display:block;border:1px solid var(--line);border-radius:9px;background:var(--back);overflow:hidden;margin:18px 0;text-decoration:none;cursor:zoom-in}.manual-image:hover{border-color:#ba7894}.manual-image img{display:block;width:100%;height:auto;background:white}.image-label{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 13px;color:var(--muted);font-size:14px;line-height:1.6}.image-label svg{width:16px;height:16px}.prose .image-pending{padding:20px;background:var(--back);color:var(--muted);border-radius:8px}.prose .heading-link{color:inherit!important;text-decoration:none!important}.prose .heading-link:hover{color:var(--pink)!important}.source-footer{font-size:14px;color:var(--muted);margin-top:28px;border-top:1px dashed var(--line);padding-top:16px}.source-footer a{text-decoration:underline;text-underline-offset:3px}
}
@layer responsive {
  @media(max-width:720px){.brand-logo{width:108px;height:44px}}
  @media(max-width:390px){.brand-logo{width:90px;height:38px}}
  @media(min-width:1600px){.page{padding-top:50px}.home-intro h1{font-size:42px}.module-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.module-card{padding:23px 21px}.module-card p{min-height:52px}}
  @media(max-width:1250px){:root{--sidebar:230px}.page{padding:35px 34px}.reading-layout{grid-template-columns:minmax(0,1fr)}.toc{display:none}.mobile-toc{display:block;background:var(--back);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin:24px 0}.mobile-toc summary{cursor:pointer;font-size:15px;font-weight:600}.mobile-toc nav{max-height:280px;overflow:auto;margin-top:12px}.mobile-toc a{display:block;font-size:14px;color:var(--muted);padding:5px 0}.header-search{width:235px}.topbar{padding:0 22px}.brand-label{font-size:14px}.brand{gap:10px}.topbar-actions{gap:15px}}
  @media(max-width:900px){.brand-divider,.brand-label{display:none}.brand{min-width:0}.header-search{width:225px}.topbar-actions{gap:12px}.page{padding:30px 26px}.module-grid{gap:12px}.module-card{padding:18px}.quick-start{padding:18px;gap:13px}.quick-start .quick-icon{display:none}.quick-start>a{font-size:14px}.home-intro h1{font-size:32px}.child-grid{grid-template-columns:1fr}.article-title{font-size:28px}}
  @media(max-width:720px){:root{--sidebar:0px}.topbar{height:65px;padding:0 16px;gap:12px}.wordmark{font-size:26px}.mobile-menu{display:grid;border:0;background:var(--back);width:36px;height:36px}.topbar-actions{gap:9px}.preview-badge{font-size:12px;padding:3px 8px}.header-search{width:36px;height:36px;justify-content:center;padding:0;border:0;background:var(--back);border-radius:7px}.header-search span,.header-search kbd{display:none}.header-search svg{width:20px}.sidebar{width:280px;top:65px;transform:translateX(-100%);transition:transform .2s;box-shadow:10px 0 30px #23354b0f}.nav-open .sidebar{transform:translateX(0)}.nav-overlay{display:none;position:fixed;inset:65px 0 0;background:#17243555;z-index:24}.nav-open .nav-overlay{display:block}.workspace{padding-top:65px}.page{padding:26px 20px 35px}.home-intro h1{font-size:29px}.home-intro .lead{font-size:16px;line-height:1.8}.eyebrow{font-size:13px}.search-form{gap:9px;padding-left:13px}.search-form input{font-size:15px}.search-form .primary-button{font-size:14px;padding:10px 14px}.quick-start{align-items:flex-start;flex-wrap:wrap;margin-top:24px}.quick-start>a{margin-left:0}.quick-start p{font-size:14px}.section-heading{margin-top:27px}.section-heading h2{font-size:21px}.section-heading span{font-size:13px}.module-grid{grid-template-columns:1fr}.module-card{padding:20px}.module-card p{font-size:15px}.module-bottom{margin-top:13px}.module-top{margin-bottom:9px}.module-top h3{font-size:18px}.article-title{font-size:27px}.prose h2{font-size:22px}.prose h3{font-size:19px}.article-meta{gap:9px}.breadcrumbs{font-size:13px;margin-bottom:20px}.pager{flex-direction:column;gap:12px}.pager a{width:100%}.page-foot{margin-top:34px;font-size:13px}.image-dialog{width:100vw;max-width:100vw;height:100dvh;max-height:100dvh;border-radius:0}.image-dialog .dialog-head{padding:12px;height:64px;gap:8px}.image-frame{padding:8px;height:calc(100% - 64px)}.zoom-button{padding:6px 9px;font-size:13px}.search-dialog{margin:20px auto;max-height:calc(100dvh - 40px)}.search-dialog .dialog-body{padding:0 18px 18px}.dialog-head{padding:15px 18px}.child-link{padding:15px}.image-label{font-size:13px}.notice{font-size:14px}.prose{font-size:16px}.hot-searches{font-size:13px;gap:8px}}
  @media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
  @media(max-width:390px){.topbar{padding:0 12px;gap:8px}.wordmark{font-size:23px}.preview-badge{font-size:12px;padding:3px 6px;gap:5px}.preview-dot{display:none}.topbar-actions{gap:6px}.mobile-menu,.header-search{width:32px;flex-shrink:0}.brand{flex-shrink:0}.page{padding-left:16px;padding-right:16px}.home-intro h1{font-size:27px}.search-form{gap:7px}.search-form .primary-button{padding-left:12px;padding-right:12px}.section-heading span{max-width:120px;text-align:right}}
  @media print{.topbar,.sidebar,.toc,.mobile-toc,.page-foot,.related,.pager,.source-footer,.breadcrumbs,.nav-overlay,dialog{display:none!important}.workspace{margin:0;padding:0}.page{display:block;max-width:none;padding:0}.manual-image{break-inside:avoid}.prose h2{break-after:avoid}.image-label{display:none}a{text-decoration:none!important}.article-title{font-size:24pt}}
}