:root{
  --bg:#0d1117; --panel:#161b22; --panel2:#1c2128; --bd:#30363d; --bd2:#21262d;
  --tx:#e6edf3; --tx2:#9aa4af; --tx3:#6e7681;
  --acc:#00add8; --acc-soft:rgba(0,173,216,.13); --acc-bd:rgba(0,173,216,.45);
  --s1:#00add8; --s2:#a371f7; --s3:#f0883e;
  --code-bg:#161b22;
  --sh:0 1px 3px rgba(0,0,0,.35);
}
html[data-theme="light"]{
  --bg:#f4f6f8; --panel:#ffffff; --panel2:#f0f3f6; --bd:#d8dee4; --bd2:#e6eaef;
  --tx:#1f2328; --tx2:#5b6673; --tx3:#8b949e;
  --acc:#0a7ea4; --acc-soft:rgba(10,126,164,.09); --acc-bd:rgba(10,126,164,.35);
  --s1:#0a7ea4; --s2:#8250df; --s3:#c2610a;
  --code-bg:#f6f8fa;
  --sh:0 1px 2px rgba(31,35,40,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  background:var(--bg); color:var(--tx); font-size:14px; line-height:1.7;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace}

/* ---------- header ---------- */
header.site{position:sticky;top:0;z-index:60;background:var(--panel);border-bottom:1px solid var(--bd)}
.hd{max-width:1180px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.hd .spacer{flex:1}
.crumb{font-size:12.5px;color:var(--tx3)}
.crumb-a{font-size:12.5px;color:var(--tx2)}
.crumb-a:hover{color:var(--acc)}
.cur{font-size:12.5px;color:var(--tx2);max-width:44vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ibtn{background:var(--panel2);border:1px solid var(--bd);color:var(--tx2);width:32px;height:32px;
  border-radius:8px;cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;font-family:inherit}
.ibtn:hover{border-color:var(--acc-bd);color:var(--acc)}

/* ---------- layout ---------- */
.shell{max-width:1180px;margin:0 auto;padding:0 20px;display:grid;
  grid-template-columns:216px minmax(0,1fr);gap:36px;align-items:start}
.toc{position:sticky;top:62px;max-height:calc(100vh - 90px);overflow-y:auto;padding:24px 0 40px}
.toc-t{font-size:11px;font-weight:700;color:var(--tx3);letter-spacing:.6px;padding:0 10px 8px}
.toc a{display:block;font-size:12.5px;color:var(--tx2);padding:4px 10px;
  border-left:2px solid transparent;border-radius:0 6px 6px 0;line-height:1.5}
.toc a:hover{color:var(--acc);background:var(--acc-soft);text-decoration:none}
.toc a.h3{padding-left:23px;font-size:12px;color:var(--tx3)}
.toc a.on{color:var(--acc);border-left-color:var(--acc);background:var(--acc-soft);font-weight:600}
.md-body{padding:26px 0 56px;max-width:860px;min-width:0}

/* ---------- 正文排版 ---------- */
.md-body h1{font-size:23px;font-weight:700;line-height:1.4;margin:0 0 20px;letter-spacing:.2px}
.md-body h2{font-size:18.5px;font-weight:700;margin:36px 0 14px;padding-bottom:8px;border-bottom:1px solid var(--bd2)}
.md-body h3{font-size:15.5px;font-weight:700;margin:26px 0 10px}
.md-body h4{font-size:14px;font-weight:700;margin:20px 0 8px;color:var(--tx2)}
.md-body p{margin:12px 0}
.md-body ul,.md-body ol{margin:12px 0 12px 24px}
.md-body li{margin:5px 0}
.md-body li>p{margin:6px 0}
.md-body blockquote{border-left:3px solid var(--acc);background:var(--panel2);
  padding:10px 16px;border-radius:0 8px 8px 0;margin:14px 0;color:var(--tx2)}
.md-body blockquote p{margin:6px 0}
.md-body hr{border:0;border-top:1px solid var(--bd);margin:28px 0}
.md-body strong{color:var(--tx);font-weight:700}
.md-body a{color:var(--acc)}
.md-body img{max-width:100%;border-radius:10px;border:1px solid var(--bd);margin:14px 0;display:block;cursor:zoom-in}
.md-body pre{background:var(--code-bg);border:1px solid var(--bd);border-radius:10px;
  padding:14px 16px;overflow-x:auto;margin:14px 0;line-height:1.6}
.md-body pre code{background:none;padding:0;font-size:12.8px;color:var(--tx);white-space:pre}
.md-body :not(pre)>code{background:var(--acc-soft);color:var(--acc);padding:2px 6px;border-radius:5px;font-size:.87em;white-space:nowrap}
.md-body table{width:100%;border-collapse:collapse;margin:16px 0;font-size:13px;display:block;overflow-x:auto}
.md-body th,.md-body td{border:1px solid var(--bd);padding:8px 12px;text-align:left;vertical-align:top}
.md-body th{background:var(--panel2);font-weight:700;white-space:nowrap}
.md-body tr:nth-child(even) td{background:var(--panel2)}

/* ---------- pager ---------- */
.pager{max-width:1180px;margin:0 auto;padding:0 20px 8px;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pager a{background:var(--panel);border:1px solid var(--bd);border-radius:10px;padding:12px 15px;
  display:block;color:var(--tx);box-shadow:var(--sh)}
.pager a:hover{border-color:var(--acc-bd);text-decoration:none}
.pager .k{font-size:11px;color:var(--tx3);display:block;margin-bottom:4px}
.pager .v{font-size:13px;font-weight:600;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager .next{text-align:right}
.pager .ph{visibility:hidden}
footer.site{max-width:1180px;margin:0 auto;padding:26px 20px 44px;color:var(--tx3);font-size:12px;
  border-top:1px solid var(--bd2);display:flex;gap:12px;flex-wrap:wrap;align-items:center}
footer.site .spacer{flex:1}
footer.site a{color:var(--tx2)}

/* ---------- lightbox ---------- */
#lb{position:fixed;inset:0;background:rgba(0,0,0,.9);display:none;
  align-items:center;justify-content:center;z-index:200;cursor:zoom-out;padding:22px}
#lb.on{display:flex}
#lb img{max-width:100%;max-height:100%;border-radius:8px;border:0;margin:0;cursor:zoom-out}

/* ---------- 首页 ---------- */
.hero{padding:56px 0 10px;text-align:center}
.hero h1{font-size:32px;font-weight:800;letter-spacing:.5px}
.hero .p{color:var(--tx2);font-size:14px;margin-top:10px}
.cards{max-width:820px;margin:34px auto 0;padding:0 20px;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}
.card{background:var(--panel);border:1px solid var(--bd);border-radius:14px;padding:22px;
  box-shadow:var(--sh);display:block;color:var(--tx);transition:border-color .18s,transform .18s}
.card:hover{border-color:var(--acc-bd);transform:translateY(-2px);text-decoration:none}
.card.off{opacity:.62}
.card.off:hover{transform:none;border-color:var(--bd)}
.card .ic{width:42px;height:42px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;color:#fff;margin-bottom:14px}
.card .nm{font-size:16.5px;font-weight:700;display:flex;align-items:center;gap:8px}
.card .ds{font-size:12.8px;color:var(--tx2);margin-top:7px;line-height:1.65}
.card .st{display:flex;gap:7px;flex-wrap:wrap;margin-top:14px}
.card .st span{font-size:11px;background:var(--panel2);border:1px solid var(--bd2);
  color:var(--tx2);padding:3px 9px;border-radius:99px}
.pill{font-size:10.5px;font-weight:700;padding:2px 8px;border-radius:99px;background:var(--acc-soft);
  color:var(--acc);border:1px solid var(--acc-bd)}
.pill.gray{background:var(--panel2);color:var(--tx3);border-color:var(--bd2)}
.foot-note{max-width:820px;margin:38px auto 60px;padding:0 20px;color:var(--tx3);font-size:12px;text-align:center;line-height:1.9}

@media (max-width:900px){
  .shell{grid-template-columns:1fr;gap:0}
  .toc{position:static;max-height:186px;overflow-y:auto;border-bottom:1px solid var(--bd);
    padding:16px 0 14px;margin-bottom:8px}
  .pager{grid-template-columns:1fr}
  .hero{padding:36px 0 6px}
  .hero h1{font-size:25px}
  .cur{max-width:34vw}
}

pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
html[data-theme="dark"] .hlw .hll { background-color: #49483e }
html[data-theme="dark"] .hlw { background: #272822; color: #F8F8F2 }
html[data-theme="dark"] .hlw .c { color: #959077 } /* Comment */
html[data-theme="dark"] .hlw .err { color: #ED007E; background-color: #1E0010 } /* Error */
html[data-theme="dark"] .hlw .esc { color: #F8F8F2 } /* Escape */
html[data-theme="dark"] .hlw .g { color: #F8F8F2 } /* Generic */
html[data-theme="dark"] .hlw .k { color: #66D9EF } /* Keyword */
html[data-theme="dark"] .hlw .l { color: #AE81FF } /* Literal */
html[data-theme="dark"] .hlw .n { color: #F8F8F2 } /* Name */
html[data-theme="dark"] .hlw .o { color: #FF4689 } /* Operator */
html[data-theme="dark"] .hlw .x { color: #F8F8F2 } /* Other */
html[data-theme="dark"] .hlw .p { color: #F8F8F2 } /* Punctuation */
html[data-theme="dark"] .hlw .ch { color: #959077 } /* Comment.Hashbang */
html[data-theme="dark"] .hlw .cm { color: #959077 } /* Comment.Multiline */
html[data-theme="dark"] .hlw .cp { color: #959077 } /* Comment.Preproc */
html[data-theme="dark"] .hlw .cpf { color: #959077 } /* Comment.PreprocFile */
html[data-theme="dark"] .hlw .c1 { color: #959077 } /* Comment.Single */
html[data-theme="dark"] .hlw .cs { color: #959077 } /* Comment.Special */
html[data-theme="dark"] .hlw .gd { color: #FF4689 } /* Generic.Deleted */
html[data-theme="dark"] .hlw .ge { color: #F8F8F2; font-style: italic } /* Generic.Emph */
html[data-theme="dark"] .hlw .ges { color: #F8F8F2; font-weight: bold; font-style: italic } /* Generic.EmphStrong */
html[data-theme="dark"] .hlw .gr { color: #FF4689 } /* Generic.Error */
html[data-theme="dark"] .hlw .gh { color: #F8F8F2 } /* Generic.Heading */
html[data-theme="dark"] .hlw .gi { color: #A6E22E } /* Generic.Inserted */
html[data-theme="dark"] .hlw .go { color: #66D9EF } /* Generic.Output */
html[data-theme="dark"] .hlw .gp { color: #FF4689; font-weight: bold } /* Generic.Prompt */
html[data-theme="dark"] .hlw .gs { color: #F8F8F2; font-weight: bold } /* Generic.Strong */
html[data-theme="dark"] .hlw .gu { color: #959077 } /* Generic.Subheading */
html[data-theme="dark"] .hlw .gt { color: #66D9EF } /* Generic.Traceback */
html[data-theme="dark"] .hlw .kc { color: #66D9EF } /* Keyword.Constant */
html[data-theme="dark"] .hlw .kd { color: #66D9EF } /* Keyword.Declaration */
html[data-theme="dark"] .hlw .kn { color: #FF4689 } /* Keyword.Namespace */
html[data-theme="dark"] .hlw .kp { color: #66D9EF } /* Keyword.Pseudo */
html[data-theme="dark"] .hlw .kr { color: #66D9EF } /* Keyword.Reserved */
html[data-theme="dark"] .hlw .kt { color: #66D9EF } /* Keyword.Type */
html[data-theme="dark"] .hlw .ld { color: #E6DB74 } /* Literal.Date */
html[data-theme="dark"] .hlw .m { color: #AE81FF } /* Literal.Number */
html[data-theme="dark"] .hlw .s { color: #E6DB74 } /* Literal.String */
html[data-theme="dark"] .hlw .na { color: #A6E22E } /* Name.Attribute */
html[data-theme="dark"] .hlw .nb { color: #A6E22E } /* Name.Builtin */
html[data-theme="dark"] .hlw .nc { color: #A6E22E } /* Name.Class */
html[data-theme="dark"] .hlw .no { color: #66D9EF } /* Name.Constant */
html[data-theme="dark"] .hlw .nd { color: #A6E22E } /* Name.Decorator */
html[data-theme="dark"] .hlw .ni { color: #F8F8F2 } /* Name.Entity */
html[data-theme="dark"] .hlw .ne { color: #A6E22E } /* Name.Exception */
html[data-theme="dark"] .hlw .nf { color: #A6E22E } /* Name.Function */
html[data-theme="dark"] .hlw .nl { color: #F8F8F2 } /* Name.Label */
html[data-theme="dark"] .hlw .nn { color: #F8F8F2 } /* Name.Namespace */
html[data-theme="dark"] .hlw .nx { color: #A6E22E } /* Name.Other */
html[data-theme="dark"] .hlw .py { color: #F8F8F2 } /* Name.Property */
html[data-theme="dark"] .hlw .nt { color: #FF4689 } /* Name.Tag */
html[data-theme="dark"] .hlw .nv { color: #F8F8F2 } /* Name.Variable */
html[data-theme="dark"] .hlw .ow { color: #FF4689 } /* Operator.Word */
html[data-theme="dark"] .hlw .pm { color: #F8F8F2 } /* Punctuation.Marker */
html[data-theme="dark"] .hlw .w { color: #F8F8F2 } /* Text.Whitespace */
html[data-theme="dark"] .hlw .mb { color: #AE81FF } /* Literal.Number.Bin */
html[data-theme="dark"] .hlw .mf { color: #AE81FF } /* Literal.Number.Float */
html[data-theme="dark"] .hlw .mh { color: #AE81FF } /* Literal.Number.Hex */
html[data-theme="dark"] .hlw .mi { color: #AE81FF } /* Literal.Number.Integer */
html[data-theme="dark"] .hlw .mo { color: #AE81FF } /* Literal.Number.Oct */
html[data-theme="dark"] .hlw .sa { color: #E6DB74 } /* Literal.String.Affix */
html[data-theme="dark"] .hlw .sb { color: #E6DB74 } /* Literal.String.Backtick */
html[data-theme="dark"] .hlw .sc { color: #E6DB74 } /* Literal.String.Char */
html[data-theme="dark"] .hlw .dl { color: #E6DB74 } /* Literal.String.Delimiter */
html[data-theme="dark"] .hlw .sd { color: #E6DB74 } /* Literal.String.Doc */
html[data-theme="dark"] .hlw .s2 { color: #E6DB74 } /* Literal.String.Double */
html[data-theme="dark"] .hlw .se { color: #AE81FF } /* Literal.String.Escape */
html[data-theme="dark"] .hlw .sh { color: #E6DB74 } /* Literal.String.Heredoc */
html[data-theme="dark"] .hlw .si { color: #E6DB74 } /* Literal.String.Interpol */
html[data-theme="dark"] .hlw .sx { color: #E6DB74 } /* Literal.String.Other */
html[data-theme="dark"] .hlw .sr { color: #E6DB74 } /* Literal.String.Regex */
html[data-theme="dark"] .hlw .s1 { color: #E6DB74 } /* Literal.String.Single */
html[data-theme="dark"] .hlw .ss { color: #E6DB74 } /* Literal.String.Symbol */
html[data-theme="dark"] .hlw .bp { color: #A6E22E } /* Name.Builtin.Pseudo */
html[data-theme="dark"] .hlw .fm { color: #A6E22E } /* Name.Function.Magic */
html[data-theme="dark"] .hlw .vc { color: #F8F8F2 } /* Name.Variable.Class */
html[data-theme="dark"] .hlw .vg { color: #F8F8F2 } /* Name.Variable.Global */
html[data-theme="dark"] .hlw .vi { color: #F8F8F2 } /* Name.Variable.Instance */
html[data-theme="dark"] .hlw .vm { color: #F8F8F2 } /* Name.Variable.Magic */
html[data-theme="dark"] .hlw .il { color: #AE81FF } /* Literal.Number.Integer.Long */
pre { line-height: 125%; }
td.linenos .normal { color: #666666; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: #666666; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
html[data-theme="light"] .hlw .hll { background-color: #ffffcc }
html[data-theme="light"] .hlw { background: #f0f0f0; }
html[data-theme="light"] .hlw .c { color: #60A0B0; font-style: italic } /* Comment */
html[data-theme="light"] .hlw .err { border: 1px solid #F00 } /* Error */
html[data-theme="light"] .hlw .k { color: #007020; font-weight: bold } /* Keyword */
html[data-theme="light"] .hlw .o { color: #666 } /* Operator */
html[data-theme="light"] .hlw .ch { color: #60A0B0; font-style: italic } /* Comment.Hashbang */
html[data-theme="light"] .hlw .cm { color: #60A0B0; font-style: italic } /* Comment.Multiline */
html[data-theme="light"] .hlw .cp { color: #007020 } /* Comment.Preproc */
html[data-theme="light"] .hlw .cpf { color: #60A0B0; font-style: italic } /* Comment.PreprocFile */
html[data-theme="light"] .hlw .c1 { color: #60A0B0; font-style: italic } /* Comment.Single */
html[data-theme="light"] .hlw .cs { color: #60A0B0; background-color: #FFF0F0 } /* Comment.Special */
html[data-theme="light"] .hlw .gd { color: #A00000 } /* Generic.Deleted */
html[data-theme="light"] .hlw .ge { font-style: italic } /* Generic.Emph */
html[data-theme="light"] .hlw .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
html[data-theme="light"] .hlw .gr { color: #F00 } /* Generic.Error */
html[data-theme="light"] .hlw .gh { color: #000080; font-weight: bold } /* Generic.Heading */
html[data-theme="light"] .hlw .gi { color: #00A000 } /* Generic.Inserted */
html[data-theme="light"] .hlw .go { color: #888 } /* Generic.Output */
html[data-theme="light"] .hlw .gp { color: #C65D09; font-weight: bold } /* Generic.Prompt */
html[data-theme="light"] .hlw .gs { font-weight: bold } /* Generic.Strong */
html[data-theme="light"] .hlw .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
html[data-theme="light"] .hlw .gt { color: #04D } /* Generic.Traceback */
html[data-theme="light"] .hlw .kc { color: #007020; font-weight: bold } /* Keyword.Constant */
html[data-theme="light"] .hlw .kd { color: #007020; font-weight: bold } /* Keyword.Declaration */
html[data-theme="light"] .hlw .kn { color: #007020; font-weight: bold } /* Keyword.Namespace */
html[data-theme="light"] .hlw .kp { color: #007020 } /* Keyword.Pseudo */
html[data-theme="light"] .hlw .kr { color: #007020; font-weight: bold } /* Keyword.Reserved */
html[data-theme="light"] .hlw .kt { color: #902000 } /* Keyword.Type */
html[data-theme="light"] .hlw .m { color: #40A070 } /* Literal.Number */
html[data-theme="light"] .hlw .s { color: #4070A0 } /* Literal.String */
html[data-theme="light"] .hlw .na { color: #4070A0 } /* Name.Attribute */
html[data-theme="light"] .hlw .nb { color: #007020 } /* Name.Builtin */
html[data-theme="light"] .hlw .nc { color: #0E84B5; font-weight: bold } /* Name.Class */
html[data-theme="light"] .hlw .no { color: #60ADD5 } /* Name.Constant */
html[data-theme="light"] .hlw .nd { color: #555; font-weight: bold } /* Name.Decorator */
html[data-theme="light"] .hlw .ni { color: #D55537; font-weight: bold } /* Name.Entity */
html[data-theme="light"] .hlw .ne { color: #007020 } /* Name.Exception */
html[data-theme="light"] .hlw .nf { color: #06287E } /* Name.Function */
html[data-theme="light"] .hlw .nl { color: #002070; font-weight: bold } /* Name.Label */
html[data-theme="light"] .hlw .nn { color: #0E84B5; font-weight: bold } /* Name.Namespace */
html[data-theme="light"] .hlw .nt { color: #062873; font-weight: bold } /* Name.Tag */
html[data-theme="light"] .hlw .nv { color: #BB60D5 } /* Name.Variable */
html[data-theme="light"] .hlw .ow { color: #007020; font-weight: bold } /* Operator.Word */
html[data-theme="light"] .hlw .w { color: #BBB } /* Text.Whitespace */
html[data-theme="light"] .hlw .mb { color: #40A070 } /* Literal.Number.Bin */
html[data-theme="light"] .hlw .mf { color: #40A070 } /* Literal.Number.Float */
html[data-theme="light"] .hlw .mh { color: #40A070 } /* Literal.Number.Hex */
html[data-theme="light"] .hlw .mi { color: #40A070 } /* Literal.Number.Integer */
html[data-theme="light"] .hlw .mo { color: #40A070 } /* Literal.Number.Oct */
html[data-theme="light"] .hlw .sa { color: #4070A0 } /* Literal.String.Affix */
html[data-theme="light"] .hlw .sb { color: #4070A0 } /* Literal.String.Backtick */
html[data-theme="light"] .hlw .sc { color: #4070A0 } /* Literal.String.Char */
html[data-theme="light"] .hlw .dl { color: #4070A0 } /* Literal.String.Delimiter */
html[data-theme="light"] .hlw .sd { color: #4070A0; font-style: italic } /* Literal.String.Doc */
html[data-theme="light"] .hlw .s2 { color: #4070A0 } /* Literal.String.Double */
html[data-theme="light"] .hlw .se { color: #4070A0; font-weight: bold } /* Literal.String.Escape */
html[data-theme="light"] .hlw .sh { color: #4070A0 } /* Literal.String.Heredoc */
html[data-theme="light"] .hlw .si { color: #70A0D0; font-style: italic } /* Literal.String.Interpol */
html[data-theme="light"] .hlw .sx { color: #C65D09 } /* Literal.String.Other */
html[data-theme="light"] .hlw .sr { color: #235388 } /* Literal.String.Regex */
html[data-theme="light"] .hlw .s1 { color: #4070A0 } /* Literal.String.Single */
html[data-theme="light"] .hlw .ss { color: #517918 } /* Literal.String.Symbol */
html[data-theme="light"] .hlw .bp { color: #007020 } /* Name.Builtin.Pseudo */
html[data-theme="light"] .hlw .fm { color: #06287E } /* Name.Function.Magic */
html[data-theme="light"] .hlw .vc { color: #BB60D5 } /* Name.Variable.Class */
html[data-theme="light"] .hlw .vg { color: #BB60D5 } /* Name.Variable.Global */
html[data-theme="light"] .hlw .vi { color: #BB60D5 } /* Name.Variable.Instance */
html[data-theme="light"] .hlw .vm { color: #BB60D5 } /* Name.Variable.Magic */
html[data-theme="light"] .hlw .il { color: #40A070 } /* Literal.Number.Integer.Long */