/* Article design system: editorial hierarchy with the existing site font. */
body#luansui-article-page{--lua-ink:#142f50;--lua-text:#344b64;--lua-muted:#62748a;--lua-blue:#2563d9;--lua-line:#e1e9f3;--lua-soft:#f4f8ff;background:#f5f7fb;color:var(--lua-ink)}
#luansui-article-page .luansui_article_page,#luansui-article-page .luansui_article_page *{box-sizing:border-box}
#luansui-article-page .luansui_article_page{padding:100px 0 64px;min-height:70vh;background:radial-gradient(ellipse at 10% 0%,#eaf2ff 0,transparent 44%)}
#luansui-article-page .luansui_article_wrap{width:calc(100% - 64px);max-width:1200px;margin:0 auto}
#luansui-article-page .lua-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0 0 20px;min-height:44px}
#luansui-article-page .lua-toolbar a{color:var(--lua-muted);font-size:14px;text-decoration:none;display:inline-flex;align-items:center;gap:12px;min-height:44px}
#luansui-article-page .lua-return::before{content:'';width:7px;height:7px;border-left:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
#luansui-article-page .lua-toolbar-label{font-size:12px;letter-spacing:.1em;color:var(--lua-muted)}
#luansui-article-page .luansui_article_layout{display:grid;grid-template-columns:minmax(0,1fr) 272px;gap:28px;align-items:start}
#luansui-article-page .luansui_article_layout.is-single{grid-template-columns:minmax(0,900px);justify-content:center}
#luansui-article-page .luansui_article_main{min-width:0;overflow:hidden;border:1px solid var(--lua-line);border-radius:18px;background:white;box-shadow:0 12px 40px #18375906}
#luansui-article-page .luansui_article_header{position:relative!important;top:auto!important;left:auto!important;width:100%!important;height:auto!important;min-height:0!important;z-index:auto!important;display:block!important;box-shadow:none!important;border:0!important;border-bottom:1px solid var(--lua-line)!important;border-radius:0!important;margin:0!important;padding:36px 40px 28px!important;background:linear-gradient(120deg,#f0f6ff 0%,#fafcff 65%,#fff 100%)!important;color:var(--lua-ink);text-align:left}
#luansui-article-page .lua-heading-top{display:flex;align-items:center;gap:16px;margin-bottom:20px}
#luansui-article-page #luansui-article-category{display:inline-flex;align-items:center;min-height:28px;padding:2px 10px;border:1px solid #c7d9fa;border-radius:5px;color:#1e57b7;background:#f5f9ff;text-decoration:none;font-size:12px;line-height:1.8;flex-shrink:0;max-width:80%;overflow-wrap:anywhere}
#luansui-article-page .lua-heading-rule{height:1px;background:linear-gradient(90deg,#c9d9f2,transparent);flex:1}
#luansui-article-page .luansui_article_header h1{font-size:32px;line-height:1.55;letter-spacing:.01em;font-weight:700;color:var(--lua-ink);margin:0 0 24px;padding:0;overflow-wrap:anywhere;word-break:normal}
#luansui-article-page .lua-heading-bottom{display:flex;justify-content:space-between;gap:12px;align-items:center}
#luansui-article-page .luansui_article_meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:12px;line-height:1.8;color:var(--lua-muted)}
#luansui-article-page #lua-reading-time{padding-left:16px;border-left:1px solid #cfdaea}
#luansui-article-page .lua-copy-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 13px;border:1px solid #d7e2f3;background:#ffffffb3;border-radius:7px;font-size:12px;font-family:inherit;color:#385579;cursor:pointer;white-space:nowrap;transition:background .2s,border-color .2s}
#luansui-article-page .lua-copy-link:hover{background:#edf4ff;border-color:#a6c2f2}
#luansui-article-page .lua-copy-link:disabled{cursor:wait;opacity:.65}
#luansui-article-page .lua-copy-status{font-size:12px;line-height:1.8;color:var(--lua-blue);margin:0;min-height:0}
#luansui-article-page .lua-copy-status:empty{display:none}
#luansui-article-page .lua-article-content{padding:36px 40px 28px}
#luansui-article-page .luansui_article_body{font-size:17px;line-height:1.95;color:var(--lua-text);overflow-wrap:anywhere;word-break:normal;text-indent:0}
#luansui-article-page .luansui_article_body> :first-child{margin-top:0}
#luansui-article-page .luansui_article_body p{margin:0 0 22px}
#luansui-article-page .luansui_article_body h1,#luansui-article-page .luansui_article_body h2,#luansui-article-page .luansui_article_body h3,#luansui-article-page .luansui_article_body h4,#luansui-article-page .luansui_article_body h5,#luansui-article-page .luansui_article_body h6{color:var(--lua-ink);font-weight:700;line-height:1.65;scroll-margin-top:100px;margin:36px 0 16px}
#luansui-article-page .luansui_article_body h1,#luansui-article-page .luansui_article_body h2{font-size:23px;padding-bottom:12px;border-bottom:1px solid #e9eef6}
#luansui-article-page .luansui_article_body h3{font-size:19px}
#luansui-article-page .luansui_article_body h4,#luansui-article-page .luansui_article_body h5,#luansui-article-page .luansui_article_body h6{font-size:17px}
#luansui-article-page .luansui_article_body a{color:#1d5ec8;text-decoration:underline;text-underline-offset:4px}
#luansui-article-page .luansui_article_body strong,#luansui-article-page .luansui_article_body b{color:#233e60;font-weight:700}
#luansui-article-page .luansui_article_body ul,#luansui-article-page .luansui_article_body ol{padding-left:1.5em;margin:18px 0 24px;list-style-position:outside}
#luansui-article-page .luansui_article_body ul{list-style-type:disc}
#luansui-article-page .luansui_article_body ol{list-style-type:decimal}
#luansui-article-page .luansui_article_body li{margin:8px 0;padding-left:4px}
#luansui-article-page .luansui_article_body li::marker{color:#4878bb}
#luansui-article-page .luansui_article_body blockquote{padding:20px 24px;margin:24px 0;border:1px solid #dde8f9;border-left:3px solid #6095eb;border-radius:0 9px 9px 0;background:#f5f9ff;color:#3b5a80}
#luansui-article-page .luansui_article_body blockquote p:last-child{margin-bottom:0}
#luansui-article-page .luansui_article_body img{display:block;max-width:100%;height:auto;margin:28px auto;border-radius:10px}
#luansui-article-page .luansui_article_body figure{margin:28px 0}
#luansui-article-page .luansui_article_body figcaption{color:var(--lua-muted);font-size:13px;text-align:center;line-height:1.8}
#luansui-article-page .luansui_article_body code{font-family:Consolas,monospace;font-size:.88em;padding:2px 6px;background:#eef3fa;color:#214f92;border-radius:4px;overflow-wrap:anywhere}
#luansui-article-page .luansui_article_body pre{max-width:100%;overflow:auto;padding:22px 24px;background:#f3f6fb;border:1px solid #e3eaf4;border-radius:10px;line-height:1.8;margin:24px 0;white-space:pre;tab-size:4}
#luansui-article-page .luansui_article_body pre code{padding:0;background:transparent;border-radius:0;overflow-wrap:normal}
#luansui-article-page .luansui_article_body hr{border:0;border-top:1px solid var(--lua-line);margin:32px 0}
#luansui-article-page .luansui_article_body audio,#luansui-article-page .luansui_article_body video{max-width:100%;display:block;margin:24px 0}
#luansui-article-page .luansui_article_body details{border:1px solid var(--lua-line);border-radius:8px;padding:16px;margin:20px 0}
#luansui-article-page .luansui_article_body summary{cursor:pointer}
#luansui-article-page .luansui_article_table{width:100%;max-width:100%;overflow:auto;margin:24px 0;border:1px solid var(--lua-line);border-radius:10px}
#luansui-article-page .luansui_article_table table{border-collapse:collapse;width:100%;min-width:440px;font-size:14px;line-height:1.8;margin:0}
#luansui-article-page .luansui_article_table th,#luansui-article-page .luansui_article_table td{padding:13px 16px;border:1px solid var(--lua-line);text-align:left}
#luansui-article-page .luansui_article_table th{background:#f2f6fd;color:var(--lua-ink)}
#luansui-article-page .luansui_article_table tr:nth-child(even){background:#fafcff}
#luansui-article-page .luansui_article_sidebar{position:sticky;top:88px;min-width:0;display:grid;gap:20px}
#luansui-article-page .luansui_article_side_section{border:1px solid var(--lua-line);border-radius:14px;padding:24px 20px;background:white;overflow:hidden}
#luansui-article-page .lua-side-caption{font-size:10px;font-family:Arial,sans-serif;letter-spacing:.16em;color:#637b9b;margin-bottom:6px}
#luansui-article-page .luansui_article_side_section h2{font-size:16px;color:var(--lua-ink);margin:0 0 18px;font-weight:700;line-height:1.5}
#luansui-article-page .luansui_article_side_heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:4px}
#luansui-article-page .luansui_article_side_heading h2{margin:0}
#luansui-article-page .luansui_article_side_heading>a{min-height:44px;display:flex;align-items:center;font-size:12px;color:#2461bd;text-decoration:none}
#luansui-article-page #luansui-article-toc{display:grid;gap:3px;max-height:36vh;overflow:auto;scrollbar-width:thin}
#luansui-article-page #luansui-article-toc a{border-left:2px solid #e8eef7;padding:10px 12px;font-size:13px;line-height:1.65;color:#536a85;text-decoration:none;overflow-wrap:anywhere;min-height:44px;transition:background .2s,color .2s}
#luansui-article-page #luansui-article-toc a.is-subheading{padding-left:24px;font-size:12px}
#luansui-article-page #luansui-article-toc a.is-current{border-left-color:var(--lua-blue);background:#f0f5ff;color:#1f5abe;font-weight:700}
#luansui-article-page #luansui-article-recent{list-style:none;counter-reset:lua-recent;margin:0;padding:0}
#luansui-article-page #luansui-article-recent li{border-bottom:1px solid #edf1f7;padding:15px 0;counter-increment:lua-recent;display:flex;gap:12px}
#luansui-article-page #luansui-article-recent li:last-child{padding-bottom:0;border-bottom:0}
#luansui-article-page #luansui-article-recent li::before{content:counter(lua-recent,decimal-leading-zero);font-size:12px;color:#6781a3;line-height:1.9;font-family:Arial,sans-serif}
#luansui-article-page #luansui-article-recent a{font-size:14px;line-height:1.8;color:#304c6d;text-decoration:none;overflow-wrap:anywhere;min-width:0;display:block;flex:1}
#luansui-article-page #luansui-article-recent time{display:block;font-size:12px;color:var(--lua-muted);margin-top:5px}
#luansui-article-page .luansui_article_attachments{border:1px solid #dbe7fa;background:#f6f9ff;border-radius:10px;padding:20px;margin-top:28px}
#luansui-article-page .luansui_article_attachments::before{content:'相关附件';display:block;font-size:14px;font-weight:700;margin-bottom:8px}
#luansui-article-page .luansui_article_attachments a{display:block;min-height:44px;padding:10px 0;line-height:1.8;color:#205ebe;font-size:14px;overflow-wrap:anywhere;text-decoration:underline;text-underline-offset:3px}
#luansui-article-page .lua-article-end{display:flex;align-items:center;justify-content:center;gap:14px;max-width:180px;margin:40px auto 32px}
#luansui-article-page .lua-article-end span{height:1px;flex:1;background:#dde6f2}
#luansui-article-page .lua-article-end i{width:5px;height:5px;background:#a7bfdf;transform:rotate(45deg)}
#luansui-article-page .luansui_article_adjacent{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
#luansui-article-page .luansui_article_adjacent a{display:block;min-width:0;min-height:98px;padding:18px;border:1px solid var(--lua-line);border-radius:10px;text-decoration:none;font-size:14px;line-height:1.8;color:#29486e;overflow-wrap:anywhere;transition:background .2s,border-color .2s}
#luansui-article-page .luansui_article_adjacent a:hover{background:#f4f8ff;border-color:#bad0f5}
#luansui-article-page .luansui_article_adjacent a span{display:block;font-size:12px;color:var(--lua-muted);margin-bottom:8px}
#luansui-article-page .luansui_article_back{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid #edf1f7;margin-top:28px;padding-top:16px}
#luansui-article-page .luansui_article_back a{min-height:44px;display:inline-flex;align-items:center;color:#526d90;font-size:13px;text-decoration:none}
#luansui-article-page .luansui_article_status{min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:32px 20px;border:1px solid var(--lua-line);border-radius:16px;background:white;color:var(--lua-muted);text-align:center;font-size:15px}
#luansui-article-page .luansui_article_status button,#luansui-article-page .luansui_article_status a{min-height:44px;padding:10px 20px;border:1px solid #ceddf4;border-radius:8px;background:#f4f8ff;color:#1d5abc;text-decoration:none;font:inherit;cursor:pointer}
#luansui-article-page .lua-reading-progress{position:fixed;top:60px;left:0;width:100%;height:2px;z-index:90;pointer-events:none}
#luansui-article-page .lua-reading-progress span{display:block;height:100%;background:#3f7ce6;transform:scaleX(0);transform-origin:left}
#luansui-article-page .lua-mobile-toc{display:none}
#luansui-article-page .luansui_article_page [hidden],#luansui-article-page .lua-reading-progress[hidden]{display:none!important}
#luansui-article-page .luansui_article_page a:focus-visible,#luansui-article-page .luansui_article_page button:focus-visible,#luansui-article-page .luansui_article_page summary:focus-visible,#luansui-article-page .luansui_article_table:focus-visible{outline:2px solid #2563d9;outline-offset:4px}
#luansui-article-title{scroll-margin-top:100px}
@media(max-width:1024px){#luansui-article-page .luansui_article_wrap{width:calc(100% - 40px)}#luansui-article-page .luansui_article_layout{grid-template-columns:minmax(0,1fr) 240px;gap:20px}#luansui-article-page .luansui_article_header{padding:30px 28px 24px!important}#luansui-article-page .lua-article-content{padding:30px 28px 24px}#luansui-article-page .luansui_article_header h1{font-size:28px}}
@media(max-width:900px){#luansui-article-page .luansui_article_layout{grid-template-columns:minmax(0,1fr)}#luansui-article-page .luansui_article_sidebar{position:static}#luansui-article-page .lua-toc-card{display:none}#luansui-article-page .lua-mobile-toc{display:block;margin:0 0 28px;border:1px solid #dfe8f6;border-radius:9px;background:#f6f9ff}#luansui-article-page .lua-mobile-toc summary{min-height:48px;padding:13px 16px;font-size:14px;font-weight:700;line-height:1.7;cursor:pointer;color:#35577e}#luansui-article-page .lua-mobile-toc nav{display:grid;border-top:1px solid #e0e9f5;padding:8px 12px 12px}#luansui-article-page .lua-mobile-toc a{display:block;min-height:44px;padding:10px 4px;color:#345d90;text-decoration:none;font-size:14px;line-height:1.8;overflow-wrap:anywhere}#luansui-article-page .lua-mobile-toc a.is-subheading{padding-left:18px}}
@media(max-width:600px){#luansui-article-page .luansui_article_page{padding:76px 0 36px}#luansui-article-page .luansui_article_wrap{width:calc(100% - 32px)}#luansui-article-page .lua-toolbar{margin-bottom:12px}#luansui-article-page .lua-toolbar-label{font-size:11px;letter-spacing:0}#luansui-article-page .lua-toolbar a{font-size:13px}#luansui-article-page .luansui_article_main{border-radius:13px}#luansui-article-page .luansui_article_header{padding:24px 20px 18px!important}#luansui-article-page .lua-heading-top{margin-bottom:16px}#luansui-article-page .luansui_article_header h1{font-size:24px;line-height:1.55;margin-bottom:18px}#luansui-article-page .lua-heading-bottom{align-items:flex-start;gap:8px}#luansui-article-page .luansui_article_meta{gap:4px;flex-direction:column;align-items:flex-start;justify-content:center;min-height:44px}#luansui-article-page #lua-reading-time{border:0;padding:0}#luansui-article-page .lua-copy-link{padding:0 10px}#luansui-article-page .lua-article-content{padding:24px 20px 18px}#luansui-article-page .luansui_article_body{font-size:16px;line-height:1.9}#luansui-article-page .luansui_article_body h1,#luansui-article-page .luansui_article_body h2{font-size:21px;margin-top:30px}#luansui-article-page .luansui_article_body h3{font-size:18px}#luansui-article-page .luansui_article_body blockquote{padding:16px;margin:22px 0}#luansui-article-page .luansui_article_body pre{padding:16px}#luansui-article-page .luansui_article_adjacent{grid-template-columns:minmax(0,1fr);gap:10px}#luansui-article-page .luansui_article_adjacent a{min-height:88px;padding:16px}#luansui-article-page .luansui_article_side_section{padding:20px;border-radius:12px}#luansui-article-page .luansui_article_body img{margin:22px auto;border-radius:7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}#luansui-article-page .luansui_article_page *{scroll-behavior:auto!important;transition:none!important}}
@media print{body#luansui-article-page{background:white}#luansui-article-page>header,#luansui-article-page>footer,#luansui-article-page .lua-toolbar,#luansui-article-page .luansui_article_sidebar,#luansui-article-page .lua-reading-progress,#luansui-article-page .lua-copy-link,#luansui-article-page .lua-mobile-toc,#luansui-article-page .luansui_article_back{display:none!important}#luansui-article-page .luansui_article_page{padding:0;background:none}#luansui-article-page .luansui_article_wrap{width:100%;max-width:none}#luansui-article-page .luansui_article_layout{display:block}#luansui-article-page .luansui_article_main{border:0;box-shadow:none}}