/* 清墨主题：系统字体、本地资源、移动优先的阅读排版。 */
:root{color-scheme:light;--bg:#faf9f6;--surface:#fff;--text:#25332f;--muted:#77817c;--line:#e6e8e2;--accent:#30775f;--soft:#eaf1eb;--code:#f0f2ed;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
:root.dark{color-scheme:dark;--bg:#171d1a;--surface:#202722;--text:#e4eae3;--muted:#a0ada3;--line:#344039;--accent:#92c9aa;--soft:#293b30;--code:#212b25}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);line-height:1.75}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button{font:inherit}.skip{position:fixed;top:-80px;background:var(--surface);padding:12px;z-index:9}.skip:focus{top:0}
.site-header{background:var(--bg);border-bottom:1px solid var(--line)}.header-inner{max-width:1160px;margin:auto;display:flex;align-items:center;gap:28px;min-height:88px;padding:16px 30px}.brand{display:flex;align-items:center;gap:12px;font-weight:750;font-size:20px;letter-spacing:.02em}.brand img{object-fit:contain;border-radius:10px}.brand-icon{display:grid;place-items:center;background:var(--accent);color:var(--bg);width:38px;height:38px;border-radius:12px;font-weight:800}.header-inner>nav{display:flex;flex:1;justify-content:flex-end;flex-wrap:wrap;gap:10px 24px;font-size:14px}.theme-toggle{border:1px solid var(--line);background:transparent;color:var(--text);border-radius:50%;width:34px;height:34px;cursor:pointer;flex-shrink:0}
.shell{max-width:960px;margin:0 auto;padding:70px 30px;min-height:68vh}.intro{padding-bottom:46px}.eyebrow{font-size:12px;letter-spacing:.18em;color:var(--accent);font-weight:650}.intro h1{font-size:clamp(30px,5vw,44px);line-height:1.35;letter-spacing:-.035em;margin:18px 0}.intro p{color:var(--muted);max-width:620px;white-space:pre-line}.intro-line{width:48px;height:3px;background:var(--accent);margin-top:30px}
.article-card{display:grid;grid-template-columns:130px minmax(0,1fr);gap:20px;padding:34px 0;border-top:1px solid var(--line)}.card-date{color:var(--muted);font-size:13px;padding-top:8px}.pinned{display:block;width:fit-content;margin-top:12px;padding:1px 8px;border-radius:4px;background:var(--soft);color:var(--accent);font-size:11px}.article-card h2{font-size:23px;line-height:1.5;margin:0 0 12px;font-weight:650;overflow-wrap:anywhere}.article-card p{margin:0;color:var(--muted);font-size:15px;line-height:1.9;overflow-wrap:anywhere}.card-footer{display:flex;justify-content:space-between;gap:12px;margin-top:20px;font-size:12px;color:var(--muted)}.card-footer a{color:var(--accent)}
.pagination{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:25px 0;border-top:1px solid var(--line);font-size:14px;color:var(--muted)}.pagination a{color:var(--accent)}.site-footer{max-width:1100px;margin:auto;padding:26px 30px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px}
.article-shell{max-width:1160px;display:grid;grid-template-columns:minmax(0,780px) 190px;gap:70px}.article-header{padding-bottom:34px;margin-bottom:30px;border-bottom:1px solid var(--line)}.article-header h1{font-size:clamp(28px,4vw,40px);line-height:1.45;margin:16px 0;overflow-wrap:anywhere}.metadata{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--muted)}.chips{display:flex;gap:8px;margin-top:20px;flex-wrap:wrap}.chips a{font-size:12px;background:var(--soft);color:var(--accent);padding:3px 10px;border-radius:5px}
.prose{font-size:16px;line-height:1.95;overflow-wrap:anywhere}.prose h2{font-size:25px;margin:44px 0 18px}.prose h3{font-size:20px;margin:32px 0 14px}.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:4px}.prose img{max-width:100%;height:auto;border-radius:8px;display:block;margin:24px auto}.prose pre{padding:22px;border:1px solid var(--line);background:var(--code);border-radius:10px;overflow:auto;line-height:1.65;font-size:13px;position:relative}.prose code{font-family:"Cascadia Code",Consolas,monospace;background:var(--code);padding:2px 5px;border-radius:4px;font-size:.9em}.prose pre code{background:transparent;padding:0}.prose blockquote{margin:24px 0;border-left:3px solid var(--accent);padding:10px 22px;color:var(--muted);background:var(--soft);border-radius:0 6px 6px 0}.prose blockquote p{margin:5px 0}.prose table{display:block;overflow:auto;border-collapse:collapse;width:100%;font-size:14px}.prose th,.prose td{border:1px solid var(--line);padding:10px 16px}.prose th{background:var(--soft)}.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}.prose input[type=checkbox]{accent-color:var(--accent)}.code-copy{position:absolute;top:8px;right:8px;background:var(--surface);border:1px solid var(--line);color:var(--muted);font-size:11px;border-radius:4px;padding:2px 8px;cursor:pointer}
.toc{position:sticky;top:32px;align-self:start;margin-top:8px;font-size:12px;border-left:1px solid var(--line);padding-left:20px}.toc>div{font-weight:600;margin-bottom:14px}.toc nav{display:flex;flex-direction:column;gap:8px;color:var(--muted);max-height:70vh;overflow:auto}.toc a.level-3,.toc a.level-4,.toc a.level-5,.toc a.level-6{padding-left:12px}.article-tags{display:flex;gap:14px;flex-wrap:wrap;margin:34px 0;color:var(--accent);font-size:13px}.comments-section{margin-top:50px}.comments-section h2{font-size:22px;margin-bottom:25px}.empty{padding:60px 0;text-align:center;color:var(--muted)}.empty h1,.empty h2{color:var(--text)}.button{display:inline-block;background:var(--accent);color:var(--bg);padding:10px 24px;border-radius:8px}.button:hover{color:var(--bg);opacity:.9}
@media(max-width:980px){.article-shell{grid-template-columns:minmax(0,1fr);max-width:820px}.toc{display:none}}@media(max-width:640px){.header-inner{padding:16px 20px;gap:14px;flex-wrap:wrap}.brand{font-size:18px;flex:1}.header-inner>nav{order:3;flex-basis:100%;justify-content:flex-start;gap:10px 22px}.shell{padding:38px 22px}.intro{padding-bottom:28px}.article-card{grid-template-columns:1fr;gap:7px;padding:26px 0}.card-date{display:flex;gap:12px;align-items:center;padding:0}.pinned{margin:0}.article-card h2{font-size:21px}.site-footer{padding:24px 22px;flex-direction:column;gap:5px}.metadata{gap:12px}.prose{font-size:15px}.prose pre{padding:18px 14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}


/* 面包屑和正文共享主题变量，不额外引入主题颜色。 */
.breadcrumbs{grid-column:1/-1;font-size:13px;color:var(--muted);margin-bottom:24px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:6px 10px;list-style:none;margin:0;padding:0}.breadcrumbs li+li::before{content:' / ';margin-right:10px;color:var(--muted)}.breadcrumbs [aria-current]{color:var(--text)}.article-shell{row-gap:24px}.article-shell>.breadcrumbs{margin:0}.breadcrumbs li{overflow-wrap:anywhere}