/* 独立实现：参考内容主题的三栏关系，使用中性面与少量动作色。 */
:root{color-scheme:light;--site-shell-width:1360px;--paper:#f3f4f6;--surface:#fff;--ink:#30343b;--muted:#666b75;--line:#d6d9df;--accent:#415d7b;--on-accent:#fff;--wash:#eceef2;--focus:#426da0;--shadow:0 3px 14px rgba(30,40,55,.045)}
:root[data-theme=dark]{color-scheme:dark;--paper:#202124;--surface:#2b2d31;--ink:#e3e4e7;--muted:#b0b3bb;--line:#4b4e56;--accent:#b6c9df;--on-accent:#20242a;--wash:#34373c;--focus:#a5c2e3;--shadow:0 3px 14px rgba(0,0,0,.08)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:28px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none;text-underline-offset:4px}
a:hover{color:var(--accent)}
a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--focus);outline-offset:4px;border-radius:3px}
button{font:inherit;cursor:pointer}
button[hidden]{display:none}
h1,h2,h3,p{margin-top:0}
p{margin-bottom:18px}
h1,h2,h3{line-height:1.5;letter-spacing:0;font-family:inherit}
.skip{position:fixed;top:-80px;left:20px;z-index:50;background:var(--surface);padding:10px 18px;border:1px solid var(--line)}
.skip:focus{top:10px}
.site-shell{width:min(var(--site-shell-width),calc(100% - 56px));margin:auto;display:grid;grid-template-columns:184px minmax(0,1fr);gap:36px;align-items:start;padding-top:42px}
.site-sidebar{position:sticky;top:42px;min-height:calc(100vh - 84px);display:flex;flex-direction:column;gap:28px}
.brand{display:flex;flex-direction:column;gap:20px;align-items:flex-start;font-size:23px;font-weight:700;line-height:1.4}
.brand img{width:64px;height:64px;border-radius:15px}
.brand small{display:block;font-size:14px;font-weight:400;line-height:1.8;color:var(--muted);margin-top:8px}
.site-nav{display:flex;flex-direction:column;gap:7px}
.site-nav a{padding:10px 12px;border-radius:7px;color:var(--muted);font-size:16px}
.site-nav a:hover{background:var(--wash);color:var(--ink)}
.site-nav a[aria-current=page]{color:var(--ink);font-weight:650;background:var(--wash)}
.sidebar-note{margin-top:auto;padding:24px 10px 0 0;color:var(--muted);font-size:13px;line-height:1.85}
.sidebar-note span{font-weight:650;color:var(--ink)}
.sidebar-note p{margin:10px 0}
.sidebar-note a{font-size:13px;text-decoration:underline}
.theme-toggle{position:fixed;right:24px;top:14px;z-index:20;background:var(--surface);border:1px solid var(--line);border-radius:20px;color:var(--muted);padding:5px 16px;font-size:13px;min-height:35px;box-shadow:var(--shadow)}
.menu-toggle{display:none}
.site-main{min-width:0}
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 236px;gap:28px;align-items:start}
.post-feed{display:flex;flex-direction:column;gap:24px;min-width:0}
.welcome-card,.post-card,.reading-card,.side-widget,.article-nav{background:var(--surface);border-radius:12px;box-shadow:var(--shadow)}
.welcome-card{padding:28px 30px}
.section-label{color:var(--muted);font-size:13px;margin:0 0 10px}
.welcome-card h1{font-size:29px;margin-bottom:14px;font-weight:700}
.welcome-card>p:not(.section-label){font-size:16px;color:var(--muted);line-height:1.9;margin-bottom:16px}
.inline-link{color:var(--accent);font-size:14px;font-weight:650}
.inline-link:hover{text-decoration:underline}
.post-card{overflow:hidden}
.post-content{padding:26px 30px}
.post-topic{display:inline-block;color:var(--accent);background:var(--wash);border-radius:4px;font-size:12px;padding:3px 9px;margin:0 0 13px;font-weight:600}
.post-content h2{font-size:23px;line-height:1.55;margin:0 0 13px;font-weight:650}
.post-content h2 a:hover{text-decoration:underline}
.post-content>p{font-size:16px;line-height:1.9;color:var(--muted);margin-bottom:20px}
.post-meta{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.post-meta a{color:var(--accent);font-weight:600}
.post-action{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:18px 30px;border-top:1px solid var(--line)}
.post-action>span{font-size:12px;color:var(--muted);line-height:1.7;flex:1;min-width:120px}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:18px;padding:9px 16px;min-height:42px;color:var(--on-accent);background:var(--accent);border-radius:5px;font-size:14px;font-weight:600;line-height:1.6;text-decoration:none}
.button:hover{color:var(--on-accent);filter:brightness(1.1)}
.compact-post .post-content>p{margin-bottom:14px}
.right-column{position:sticky;top:64px;display:flex;flex-direction:column;gap:26px;min-width:0}
.side-widget{padding:22px}
.side-widget h2,.side-note h2{font-size:15px;margin:0 0 16px;font-weight:650}
.reading-item{display:block;padding:13px 0;border-top:1px solid var(--line)}
.reading-item:last-child{padding-bottom:0}
.reading-item strong{display:block;font-size:15px;font-weight:500}
.reading-item span{display:block;font-size:13px;color:var(--muted);line-height:1.8;margin-top:5px}
.service-index>a{display:block;padding:12px 0;border-top:1px solid var(--line)}
.service-index>a:last-child{padding-bottom:0}
.service-index strong{display:block;font-size:15px;font-weight:600}
.service-index span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
.side-note{padding:0 4px;color:var(--muted);font-size:13px;line-height:1.9}
.side-note h2{color:var(--muted)}
.side-note p{margin-bottom:13px}
.side-note>a{text-decoration:underline;font-size:13px}
.site-footer{padding:34px 4px 32px;font-size:12px;color:var(--muted);line-height:1.85;max-width:800px}
.site-footer p{margin-bottom:10px}
.site-footer strong{font-weight:600;color:var(--ink)}
.site-footer>a{text-decoration:underline}
.reading-card{min-width:0;overflow:hidden}
.article-heading{padding:30px 34px 26px;border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin:0 0 20px}
.breadcrumb a:hover{text-decoration:underline}
.article-heading h1{font-size:30px;line-height:1.55;margin:3px 0 16px;font-weight:650}
.article-heading .lead{font-size:16px;color:var(--muted);line-height:1.9;margin:0}
.article-body{padding:32px 34px 34px;font-size:17px;line-height:1.95}
.article-body section{margin-bottom:38px}
.article-body section:last-child{margin-bottom:0}
.article-body h2{font-size:24px;line-height:1.6;margin-bottom:20px}
.article-body h3{font-size:19px;line-height:1.65;margin:28px 0 14px}
.article-body p{line-height:1.95}
.article-body ul,.article-body ol{padding-left:24px}
.article-body li{margin:12px 0;line-height:1.95}
.article-body a:not(.button){color:var(--accent);text-decoration:underline;text-decoration-color:var(--line)}
.article-body a:hover{text-decoration-color:currentColor}
.article-nav{padding:22px}
.article-nav p{font-size:14px;font-weight:650;color:var(--ink);margin:0 0 14px}
.article-nav a{display:block;color:var(--muted);padding:7px 0;font-size:14px;line-height:1.75}
.article-nav a:hover{color:var(--accent);text-decoration:underline}
.mobile-toc{display:none}
.inset{background:var(--wash);border-left:3px solid var(--line);padding:20px 22px;margin:26px 0;border-radius:0 5px 5px 0;font-size:16px}
.inset strong{display:block;margin-bottom:8px}
.inset p:last-child{margin-bottom:0}
.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:6px;margin:24px 0}
table{border-collapse:collapse;min-width:540px;width:100%;font-size:14px;line-height:1.85}
th,td{padding:14px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
th{font-weight:600;background:var(--wash)}
tr:last-child td{border-bottom:0}
td:first-child{color:var(--muted);min-width:90px}
.action-bar{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--line);font-size:14px}
.text-link{font-size:14px;font-weight:600}
.caption{font-size:13px;color:var(--muted);line-height:1.8;margin:14px 0 0}
.sources{font-size:15px;color:var(--muted)}
.sources a{overflow-wrap:anywhere}
.step{display:grid;grid-template-columns:32px minmax(0,1fr);gap:14px;margin:26px 0}
.step .section-number{font-size:19px;font-weight:600;line-height:1.7;color:var(--muted)}
.step h3{margin:0 0 10px}
.step p{margin:0}
details{border-bottom:1px solid var(--line);padding:16px 0}
summary{font-size:16px;font-weight:600;cursor:pointer;line-height:1.8}
details p{font-size:16px;color:var(--muted);margin:14px 0 0}
@media(max-width:1180px){.site-shell{grid-template-columns:160px minmax(0,1fr);gap:26px;width:calc(100% - 40px)}.content-grid{grid-template-columns:minmax(0,1fr) 210px;gap:22px}.brand{font-size:21px}.post-content,.welcome-card{padding:24px}.post-action{padding:18px 24px}.side-widget,.article-nav{padding:18px}.article-heading,.article-body{padding:26px}.article-heading h1{font-size:28px}}
@media(max-width:1000px){.content-grid{grid-template-columns:minmax(0,1fr)}.right-column{display:none}.mobile-toc{display:block;border-bottom:1px solid var(--line);padding:16px 26px}.mobile-toc .article-nav{padding:14px 0 0;box-shadow:none;background:none}.mobile-toc .article-nav p{display:none}.article-heading h1{font-size:29px}.post-content h2{font-size:24px}}
@media(max-width:680px){.site-shell{display:block;padding:0;width:100%}.site-sidebar{position:relative;top:0;min-height:0;display:block;padding:20px 20px 16px}.sidebar-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{flex-direction:row;gap:12px;align-items:center;font-size:20px}.brand img{width:42px;height:42px;border-radius:10px}.brand small{font-size:12px;margin-top:3px}.display-controls{display:flex;gap:8px;align-items:center}.theme-toggle{position:static;box-shadow:none;font-size:12px;padding:4px 10px;min-height:34px}.menu-toggle{display:inline-block;background:none;border:1px solid var(--line);color:var(--ink);padding:4px 10px;border-radius:18px;font-size:12px;min-height:34px}.site-nav{flex-direction:row;flex-wrap:wrap;gap:4px 10px;margin-top:18px;padding-top:12px;border-top:1px solid var(--line)}.site-nav a{font-size:14px;padding:7px 10px}.js .site-nav{display:none}.js .site-nav.is-open{display:flex}.sidebar-note{display:none}.site-main{padding:0 16px}.post-feed{gap:18px}.welcome-card{padding:22px}.welcome-card h1{font-size:25px;line-height:1.55}.welcome-card>p:not(.section-label){font-size:15px}.section-label{font-size:12px}.post-content{padding:22px}.post-content h2{font-size:21px;line-height:1.6}.post-content>p{font-size:15.5px;line-height:1.9}.post-meta{font-size:12px;gap:10px}.post-action{padding:16px 22px;align-items:flex-start;gap:12px}.post-action>span{font-size:12px;min-width:100%;flex:auto}.button{font-size:14px;padding:9px 15px;min-height:42px}.article-heading{padding:22px}.article-heading h1{font-size:26px;line-height:1.55}.article-heading .lead{font-size:15px;line-height:1.95}.breadcrumb{font-size:12px;margin-bottom:16px}.article-body{font-size:16.5px;padding:24px 22px}.article-body h2{font-size:23px}.article-body h3{font-size:18px}.mobile-toc{padding:15px 22px}.mobile-toc summary{font-size:14px}.mobile-toc .article-nav{border-radius:0}.inset{padding:18px;font-size:15px}.sources{font-size:14px}.site-footer{font-size:12px;padding:26px 4px}.post-topic{font-size:12px}.table-scroll{margin:20px 0}.action-bar{gap:16px}.step{grid-template-columns:26px minmax(0,1fr);gap:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

@media(max-width:360px){.site-sidebar{padding-left:16px;padding-right:16px}.brand{font-size:18px;gap:9px}.brand small{font-size:10px}.brand img{width:36px;height:36px}.theme-toggle,.menu-toggle{padding:4px 8px}.display-controls{gap:6px}}