/* 澄光 1.1.0 · 全页面自有样式。 */
:root{color-scheme:light;--bg:#4267d0;--gradient:linear-gradient(122deg,#159fc7 0%,#4381db 46%,#7950ed 100%);--surface:rgba(255,255,255,.18);--text:#fff;--article-title:#174ea6;--article-title-hover:#123d82;--muted:rgba(255,255,255,.9);--line:rgba(255,255,255,.34);--accent:#fff;--soft:rgba(255,255,255,.22);--code:rgba(15,30,92,.28);--dialog:#3862b3;--shadow:0 14px 28px rgba(24,48,126,.18);--radius:25px;--width:1200px}
:root.dark{color-scheme:dark;--bg:#1c2049;--gradient:linear-gradient(122deg,#0d344d 0%,#202d58 46%,#362355 100%);--surface:rgba(174,192,255,.10);--text:#f4f6ff;--article-title:#f2d7a1;--article-title-hover:#ffebc4;--muted:#c7d3eb;--line:rgba(189,209,255,.23);--accent:#dfedff;--soft:rgba(165,191,255,.17);--code:rgba(6,15,41,.5);--dialog:#202f50;--shadow:0 14px 28px rgba(3,10,30,.2)}
*,*::before,*::after{box-sizing:border-box}html{min-width:280px;scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;background-color:var(--bg);background-image:var(--gradient);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif;font-size:14px;line-height:1.75;-webkit-font-smoothing:antialiased}
body.site-background{background-image:none}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:not-allowed;opacity:.55}img,svg{max-width:100%;vertical-align:middle}img{height:auto}button svg{flex:none}[hidden]{display:none!important}::selection{color:white;background:#4c3db4}:focus-visible{outline:2px solid var(--accent);outline-offset:5px}main:focus{outline:none}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:8px;left:16px;transform:translateY(-160%);z-index:3000;padding:10px 20px;border-radius:10px;color:#153866;background:#fff}.skip-link:focus{transform:none}
.site-header,.shell,.site-footer{width:min(var(--width),calc(100% - 48px));margin-left:auto;margin-right:auto}
.site-header{position:relative;z-index:20;flex:none;margin-top:40px;border-radius:17px;background:var(--surface);box-shadow:var(--shadow);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.header-inner{min-height:82px;display:flex;align-items:center;gap:12px;padding:16px 30px}.brand{display:inline-flex;align-items:center;gap:12px;min-width:0;margin-right:auto}.brand-mark,.brand img{width:46px;height:46px;flex:none;border-radius:50%;object-fit:cover}.brand-mark{display:grid;place-items:center;background:#f5fbff;color:#159cce;font-size:20px;font-weight:750;letter-spacing:-.1em;padding-right:.1em}.brand-name{max-width:230px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:600;font-size:30px;line-height:1.4}
#site-navigation{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:24px;font-size:18px;line-height:1.6}#site-navigation a{padding:6px 0;position:relative;white-space:nowrap}#site-navigation a::after{content:"";position:absolute;bottom:1px;left:0;width:100%;height:1px;background:currentColor;transform:scaleX(0);transition:transform .18s ease}#site-navigation a:hover::after,#site-navigation a[aria-current]::after{transform:scaleX(1)}
.theme-toggle,.menu-toggle,.search-toggle{width:34px;height:34px;flex:none;display:grid;place-items:center;border:0;border-radius:50%;background:transparent;color:var(--text);padding:0}.theme-toggle:hover,.menu-toggle:hover,.search-toggle:hover{background:var(--soft)}.menu-toggle,.menu-icon-close{display:none}
.shell{flex:1 0 auto;padding:0;margin-top:30px;margin-bottom:0;min-width:0}.content-column{min-width:0}
.home-stream{min-height:1px;margin-top:24px;text-align:center;color:var(--muted);font-size:13px}.home-stream-status{margin:0 0 12px}.home-stream-retry{margin-right:12px}.home-stream-fallback{text-decoration:underline;text-underline-offset:4px}
.home-intro,.site-banners{margin:0 0 30px;overflow:hidden;border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.home-intro{min-height:230px;display:flex;flex-direction:column;justify-content:center;text-align:center;padding:36px}.home-intro h1{margin:0;font-size:clamp(30px,3.5vw,52px);line-height:1.4;font-weight:300;letter-spacing:.12em;overflow-wrap:anywhere}.home-intro p{margin:16px 0 0;color:var(--muted);letter-spacing:.08em}
.banner-slides{display:grid}.banner-slide{grid-area:1/1;position:relative;min-width:0;min-height:230px;display:grid;place-items:center;padding:32px;overflow:hidden}.banner-slide[aria-hidden="true"]{visibility:hidden;pointer-events:none}.banner-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.banner-copy{position:relative;z-index:1;max-width:100%;text-align:center;overflow-wrap:anywhere;pointer-events:none}.banner-copy a{pointer-events:auto;text-decoration:underline}.banner-copy>:first-child{margin-top:0}.banner-copy>:last-child{margin-bottom:0}.banner-copy h2,.banner-copy h3{font-size:clamp(30px,3.5vw,52px);font-weight:300;line-height:1.5;letter-spacing:.1em;margin:0 0 8px}.banner-copy p{margin:8px 0;letter-spacing:.08em}.banner-with-overlay::after{content:"";position:absolute;inset:0;background:rgba(9,29,74,.4);pointer-events:none}.banner-link{position:absolute;inset:0;z-index:2}
.banner-controls{display:flex;align-items:center;justify-content:center;gap:14px;padding:0 18px 12px}.banner-controls button{border:0;background:var(--soft);border-radius:8px;min-width:32px;height:30px;padding:0 9px}.banner-prev,.banner-next{font-size:24px;line-height:1}.banner-dots{display:flex;gap:8px}.banner-dots button{min-width:7px;width:7px;height:7px;padding:0;border-radius:8px;background:var(--line)}.banner-dots button[aria-current]{width:22px;background:var(--text)}.banner-pause{font-size:12px}
.article-list{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:30px}.article-card{grid-column:span 2;min-height:210px;min-width:0;display:flex;flex-direction:column;padding:23px 24px;border:1px solid transparent;border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);transition:transform .2s ease,background .2s ease,box-shadow .2s ease}.article-card:nth-child(-n+2){grid-column:span 3;min-height:222px;padding:27px 29px}.article-card h2{font-size:22px;font-weight:700;line-height:1.5;margin:0 0 6px;overflow-wrap:anywhere}.article-card h2 a{color:var(--article-title);transition:color .18s ease}.article-card h2 a:hover,.article-card h2 a:focus-visible{color:var(--article-title-hover);text-decoration:underline;text-underline-offset:5px}.card-summary{margin:0 0 18px;line-height:1.85;font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}.pinned{display:inline-block;vertical-align:middle;margin-left:10px;font-size:10px;line-height:1.7;padding:1px 7px;border:1px solid var(--line);border-radius:6px;font-weight:400}
.card-tags,.chips{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.card-tags{margin-bottom:14px}.card-tags a,.chips a{background:var(--soft);padding:4px 14px;border-radius:20px;line-height:1.65;font-size:14px;max-width:100%;overflow-wrap:anywhere}.card-tags a:hover,.chips a:hover{background:rgba(255,255,255,.34)}
.card-footer{margin-top:auto;display:flex;align-items:flex-end;justify-content:space-between;gap:10px}.card-meta{min-width:0;display:flex;flex-wrap:wrap;gap:0 8px;color:var(--muted);font-size:10px;line-height:1.9;overflow-wrap:anywhere}.card-meta time{white-space:nowrap}.read-more,.button,.like-button{display:inline-flex;justify-content:center;align-items:center;gap:8px;flex:none;border:1px solid var(--line);border-radius:13px;padding:8px 19px;background:var(--soft);font-size:13px;line-height:1.65}.read-more:hover,.button:hover,.like-button:not(:disabled):hover{background:rgba(255,255,255,.32)}
.site-footer{flex:none;display:flex;flex-direction:column;align-items:stretch;gap:16px;padding:24px 0;color:var(--muted);font-size:11px;overflow-wrap:anywhere}.site-copyright{flex:none;display:block;text-align:center}.footer-links{min-height:0;flex:0 1 auto;display:flex;align-items:baseline;justify-content:center;gap:8px;padding:8px 0;border:0;border-radius:0;background:transparent;box-shadow:none;text-align:center;overflow:auto}.footer-links h2{flex:none;font-size:12px;font-weight:400;margin:0;color:var(--text)}.friend-links{min-width:0;display:flex;align-items:center;justify-content:center;gap:4px 12px;flex-wrap:wrap}.friend-links a{display:inline-block;padding:0 2px;border:0;border-radius:0;background:transparent;box-shadow:none;font-size:12px}.friend-links-empty{font-size:12px;margin:0;color:var(--muted)}.site-footer a:hover{text-decoration:underline;text-underline-offset:4px}
.breadcrumbs{grid-column:1/-1;color:var(--muted);font-size:12px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0 0 22px;padding:0}.breadcrumbs li{overflow-wrap:anywhere}.breadcrumbs li+li::before{content:"/";margin-right:8px;opacity:.5}
.archive-header{margin-bottom:30px;padding:32px;border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);display:flex;justify-content:space-between;gap:24px;align-items:center}.archive-header h1{margin:0;font-size:32px;font-weight:400;overflow-wrap:anywhere}.archive-header p{margin:8px 0 0;color:var(--muted)}.archive-symbol{font-weight:200;font-size:58px;line-height:1;opacity:.55}.archive-kicker{font-size:11px;letter-spacing:.15em;margin-bottom:8px;color:var(--muted)}
.pagination{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:30px;font-size:13px}.pagination a{border:1px solid var(--line);padding:8px 18px;border-radius:12px;background:var(--surface)}.pagination a:hover{background:var(--soft)}
.empty{grid-column:1/-1;padding:65px 30px;text-align:center;border-radius:var(--radius);background:var(--surface)}.empty h1{font-size:clamp(26px,4vw,38px);margin:8px 0 12px}.empty h2{font-size:25px;margin:10px 0}.empty p{color:var(--muted);margin:8px 0 24px}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--muted)}.error-number{font-size:100px;font-weight:200;letter-spacing:.06em;line-height:1.2;margin:0 0 18px}.error-panel{padding:72px 28px;box-shadow:var(--shadow)}.error-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:28px}
.search-landing{padding:64px 28px;box-shadow:var(--shadow)}.search-orbit{display:grid;place-items:center;width:74px;height:74px;border:1px solid var(--line);border-radius:25px;background:var(--soft);margin:0 auto 24px}.search-hint{font-size:12px}.search-landing h1{font-weight:400}.search-landing .button{min-width:180px}
/* 长文在独立区域滚动，头尾保持可见。 */
body.article-page{height:100vh;height:100dvh;min-height:0;overflow:hidden}.article-page .site-header{margin-top:24px}.article-viewport{position:relative;min-height:0;flex:1 1 auto;display:flex;flex-direction:column}.article-scroll{flex:1 1 auto;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-color:var(--line) transparent}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 220px;align-items:start;gap:0 30px;padding-bottom:30px}.article-shell[data-has-toc="false"]{grid-template-columns:minmax(0,900px);justify-content:center}.article-shell>article{min-width:0;padding:38px 42px;border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
.article-header{padding-bottom:27px;margin-bottom:28px;border-bottom:1px solid var(--line)}.article-header h1{color:var(--article-title);font-size:clamp(26px,3vw,38px);line-height:1.5;margin:10px 0 15px;overflow-wrap:anywhere}.metadata{display:flex;flex-wrap:wrap;gap:5px 18px;font-size:12px;color:var(--muted)}.article-header .chips{margin-top:16px}
.prose{font-size:16px;line-height:2;overflow-wrap:anywhere}.prose>:first-child{margin-top:0}.prose>:last-child{margin-bottom:0}.prose h2,.prose h3,.prose h4,.prose h5,.prose h6{line-height:1.65;margin:1.65em 0 .65em;scroll-margin-top:24px}.prose h2{font-size:26px}.prose h3{font-size:21px}.prose h4{font-size:18px}.prose p,.prose ul,.prose ol{margin:0 0 1.35em}.prose li>ul,.prose li>ol{margin:.3em 0}.prose a{text-decoration:underline;text-underline-offset:4px}.prose blockquote{margin:24px 0;padding:16px 22px;border-left:3px solid var(--line);border-radius:0 12px 12px 0;background:var(--soft)}.prose blockquote>:last-child{margin-bottom:0}.prose img{display:block;max-width:100%;border-radius:14px;margin:20px auto}.prose figure{margin:24px 0}.prose figcaption{text-align:center;color:var(--muted);font-size:12px}.prose hr{height:1px;border:0;background:var(--line);margin:30px 0}
.prose code{padding:.15em .4em;border-radius:5px;background:var(--code);font-family:Consolas,"Cascadia Code",monospace;font-size:.9em}.prose pre{position:relative;max-width:100%;overflow:auto;padding:42px 20px 20px;border-radius:14px;background:var(--code);font-size:13px;line-height:1.8}.prose pre code{background:transparent;padding:0;font-size:inherit}.code-copy{position:absolute;right:10px;top:8px;font-size:11px;padding:2px 10px;border-radius:6px;border:1px solid var(--line);background:var(--soft);color:var(--text)}.prose table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:24px 0;font-size:14px}.prose td,.prose th{border:1px solid var(--line);padding:10px 15px;text-align:left;min-width:110px}.prose th{background:var(--soft)}
.toc{position:sticky;top:24px;padding:22px;max-height:calc(100dvh - 240px);overflow:auto;border-radius:18px;background:var(--surface);font-size:12px}.toc>div{font-weight:600;margin-bottom:12px}.toc nav{display:flex;flex-direction:column;gap:8px}.toc a{color:var(--muted);overflow-wrap:anywhere}.toc a:hover{color:var(--text);text-decoration:underline}.toc .level-3{padding-left:12px}.toc .level-4,.toc .level-5,.toc .level-6{padding-left:22px}
.article-tags{display:flex;flex-wrap:wrap;margin-top:30px;padding-top:20px;border-top:1px solid var(--line);font-size:14px}.article-likes{text-align:center;margin-top:35px}.article-likes p{font-size:12px;color:var(--muted);min-height:1.75em}.like-button[aria-pressed="true"]{background:rgba(255,199,235,.25)}.comments-section{border-top:1px solid var(--line);margin-top:30px;padding-top:24px}.comments-section h2{font-size:20px}.back-to-top{position:absolute;right:max(20px,calc((100vw - 1340px)/2));bottom:22px;display:grid;place-items:center;width:42px;height:42px;border:1px solid var(--line);border-radius:14px;background:var(--dialog);box-shadow:var(--shadow)}.article-page .site-footer{padding:12px 0;max-height:min(220px,28dvh)}
.artalk{--at-color-font:var(--text);--at-color-main:var(--accent);--at-color-deep:var(--text);--at-color-sub:var(--muted);--at-color-grey:var(--muted);--at-color-border:var(--line);--at-color-bg:transparent;--at-color-bg-transl:var(--surface);--at-color-bg-grey:var(--soft);--at-color-bg-light:var(--surface);--at-color-bg-loading:var(--soft)}
@media(hover:hover) and (pointer:fine){.article-card:hover{transform:translateY(-4px);background:rgba(255,255,255,.23);box-shadow:0 20px 34px rgba(24,48,126,.2)}:root.dark .article-card:hover{background:rgba(174,192,255,.15)}}
@media(max-width:1050px){.article-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.article-card,.article-card:nth-child(-n+2){grid-column:span 1;padding:24px;min-height:222px}.brand-name{max-width:150px}#site-navigation{gap:18px}.article-shell{grid-template-columns:minmax(0,1fr) 190px;gap:0 22px}.article-shell>article{padding:30px}}
@media(max-width:760px){:root{--radius:20px}.site-header,.shell,.site-footer{width:calc(100% - 32px)}.site-header,.article-page .site-header{margin-top:16px;border-radius:15px}.header-inner{min-height:68px;padding:12px 16px;gap:6px;flex-wrap:wrap}.brand-mark,.brand img{width:40px;height:40px}.brand-name{max-width:150px;font-size:28px}#site-navigation{order:5;flex-basis:100%;justify-content:flex-start;gap:8px 22px;padding:12px 0 4px;border-top:1px solid var(--line)}.navigation-ready #site-navigation{display:none}.navigation-ready #site-navigation.is-open{display:flex}.navigation-ready .menu-toggle{display:grid}.menu-toggle[aria-expanded="true"] .menu-icon-open{display:none}.menu-toggle[aria-expanded="true"] .menu-icon-close{display:block}.shell{margin-top:20px}.site-banners,.home-intro{margin-bottom:20px}.home-intro,.banner-slide{min-height:200px;padding:28px 22px}.home-intro h1,.banner-copy h2,.banner-copy h3{font-size:31px;letter-spacing:.06em}.home-intro p,.banner-copy p{font-size:12px}.article-list{grid-template-columns:minmax(0,1fr);gap:20px}.article-card,.article-card:nth-child(-n+2){min-height:218px;padding:24px}.article-card h2{font-size:21px}.card-summary{font-size:13px}.card-meta{font-size:10px}.site-footer{padding:20px 2px}.article-shell,.article-shell[data-has-toc="false"]{display:flex;flex-direction:column;padding-bottom:20px}.article-shell>article{order:2;width:100%;padding:25px 22px}.toc{position:static;order:1;width:100%;max-height:145px;margin-bottom:20px;padding:16px 22px}.toc nav{gap:5px}.toc>div{margin-bottom:7px}.breadcrumbs{width:100%}.breadcrumbs ol{margin-bottom:16px}.article-header{margin-bottom:24px;padding-bottom:22px}.article-header h1{font-size:27px}.prose{font-size:15px}.prose h2{font-size:22px}.prose h3{font-size:19px}.prose blockquote{padding:14px 16px}.article-page .site-footer{padding:10px 2px;max-height:min(180px,25dvh);gap:12px}.back-to-top{right:23px;bottom:15px}.archive-header{padding:24px;margin-bottom:20px}.archive-header h1{font-size:27px}.archive-symbol{font-size:42px}.error-number{font-size:80px}.search-landing,.error-panel{padding:48px 24px}}
@media(max-width:350px){.header-inner{gap:4px}.brand{gap:8px}.brand-name{max-width:120px}.brand-mark,.brand img{width:32px;height:32px}.header-inner .theme-toggle,.header-inner .menu-toggle,.header-inner .search-toggle{width:28px;height:28px}.read-more{padding:8px 13px}.article-card,.article-card:nth-child(-n+2){padding:21px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{:root,:root.dark{--text:#111;--article-title:#111;--article-title-hover:#111;--muted:#555;--line:#bbb;--surface:transparent;--soft:#eee;--code:#eee}body,body.article-page{color:#111;background:white;height:auto;overflow:visible;display:block}.site-header,.site-footer,.toc,.back-to-top,.article-likes,.comments-section,.code-copy,.reader-dialog{display:none!important}.article-viewport,.article-scroll{overflow:visible;display:block}.shell,.article-shell{display:block;width:100%;margin:0}.article-shell>article{box-shadow:none;padding:0}}