/* 文档页样式：清新、支持暗色模式 */
:root{--bg:#f6faf9;--fg:#1f2d2b;--muted:#6b7c79;--line:#e2ebe8;--card:#fff;--accent:#0f9d8a;--soft:#e7f6f3;--code-bg:#f4f7f6;--inline:#eef3f2;--quote:#566764}
@media (prefers-color-scheme:dark){:root{--bg:#111716;--fg:#dce6e3;--muted:#8d9c99;--line:#243030;--card:#161f1e;--accent:#3cc6b0;--soft:#15302b;--code-bg:#0f1514;--inline:#1e2927;--quote:#a2b1ae}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}

.topbar{max-width:860px;margin:0 auto;padding:18px 20px 0}
.brand{font-weight:700;color:var(--fg)}
.wrap{max-width:860px;margin:0 auto;padding:16px 20px 40px}
.doc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:36px 44px}
@media (max-width:640px){.wrap{padding:12px 0 32px}.doc{padding:22px 16px;border-radius:0;border-left:0;border-right:0}.topbar{padding:14px 16px 0}}

.doc-head h1{font-size:1.85em;line-height:1.35;margin:0 0 .45em}
.meta{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;color:var(--muted);font-size:.86em}
.badge{background:var(--soft);color:var(--accent);padding:0 10px;border-radius:99px;font-weight:600}
.meta .tag{color:var(--muted)}.meta .tag:hover{color:var(--accent)}
.prompt{margin:20px 0 0;padding:12px 16px;background:var(--soft);border-radius:10px;color:var(--fg);font-size:.95em}
.prompt .label{font-size:.78em;font-weight:700;color:var(--accent);margin-bottom:2px;letter-spacing:.05em}

.toc{margin:24px 0 8px;border:1px solid var(--line);border-radius:10px;padding:8px 16px;font-size:.92em}
.toc summary{cursor:pointer;font-weight:600;color:var(--muted)}
.toc ul{list-style:none;margin:6px 0 4px;padding:0}
.toc li{margin:2px 0}.toc .toc-l3{padding-left:1.3em;font-size:.95em}
.toc a{color:var(--fg)}.toc a:hover{color:var(--accent)}

.foot{text-align:center;color:var(--muted);font-size:.875em;padding:8px 0 40px}

/* ---------- Markdown 正文 ---------- */
.markdown-body{margin-top:24px;overflow-wrap:break-word}
.markdown-body>*:first-child{margin-top:0}
.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4,.markdown-body h5,.markdown-body h6{line-height:1.4;margin:1.7em 0 .6em;font-weight:650;scroll-margin-top:16px}
.markdown-body h1{font-size:1.55em}
.markdown-body h2{font-size:1.35em;padding-bottom:.3em;border-bottom:1px solid var(--line)}
.markdown-body h3{font-size:1.15em}
.markdown-body h4,.markdown-body h5,.markdown-body h6{font-size:1em}
.markdown-body .anchor{margin-left:.35em;color:var(--muted);font-weight:400;opacity:0;transition:opacity .15s}
.markdown-body :is(h1,h2,h3,h4,h5,h6):hover .anchor{opacity:1}
.markdown-body p,.markdown-body ul,.markdown-body ol,.markdown-body blockquote,.markdown-body pre,.markdown-body .table-wrap,.markdown-body dl{margin:0 0 1.05em}
.markdown-body ul,.markdown-body ol{padding-left:1.6em}
.markdown-body li+li{margin-top:.3em}
.markdown-body li>p{margin:.3em 0}
.markdown-body li>ul,.markdown-body li>ol{margin:.3em 0 0}
.markdown-body li:has(>input[type=checkbox]){list-style:none;margin-left:-1.3em}
.markdown-body input[type=checkbox]{margin:0 .45em 0 0;vertical-align:-.1em}
.markdown-body strong{font-weight:650}
.markdown-body blockquote{padding:.3em 1em;color:var(--quote);border-left:4px solid var(--accent);background:var(--soft);border-radius:0 8px 8px 0}
.markdown-body blockquote>:last-child{margin-bottom:0}
.markdown-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.markdown-body img{max-width:100%;height:auto;border-radius:8px}
.markdown-body code{font-family:ui-monospace,SFMono-Regular,"JetBrains Mono",Menlo,Consolas,monospace;font-size:.88em}
.markdown-body :not(pre)>code{background:var(--inline);padding:.15em .4em;border-radius:5px}
.markdown-body pre{position:relative;background:var(--code-bg);border:1px solid var(--line);border-radius:10px;padding:14px 16px;overflow:auto;line-height:1.6}
.markdown-body pre code,.markdown-body pre code.hljs{background:transparent;padding:0;font-size:.86em;color:inherit}
.markdown-body pre[data-lang]::before{content:attr(data-lang);position:absolute;top:4px;right:64px;font-size:.72em;color:var(--muted);font-family:ui-monospace,Menlo,monospace}
.markdown-body pre .copy{position:absolute;top:6px;right:8px;font:12px/1 inherit;padding:5px 9px;border:1px solid var(--line);border-radius:6px;background:var(--card);color:var(--muted);cursor:pointer;opacity:0;transition:opacity .15s}
.markdown-body pre:hover .copy{opacity:1}
@media (hover:none){.markdown-body pre .copy{opacity:1}}
.markdown-body .table-wrap{overflow-x:auto}
.markdown-body table{border-collapse:collapse;font-size:.94em;min-width:50%}
.markdown-body th,.markdown-body td{border:1px solid var(--line);padding:8px 12px;vertical-align:top}
.markdown-body th{background:var(--code-bg);font-weight:600;text-align:left}
.markdown-body tbody tr:hover{background:var(--soft)}
.markdown-body .math-display{display:block;overflow-x:auto;overflow-y:hidden;margin:1em 0;text-align:center}
.markdown-body .mermaid{text-align:center;margin:0 0 1em;overflow-x:auto}
.markdown-body .footnotes{font-size:.9em;color:var(--muted);margin-top:2.5em}
.markdown-body .footnotes hr{margin:0 0 1em}