:root{color-scheme:light;--bg:#f7f6f2;--surface:#f7f6f2;--solid:#fff;--text:#252625;--muted:#666965;--line:#d1d2cb;--green:#9b452e;--soft:#eeede7;--header:#f7f6f2;--mono:ui-monospace,SFMono-Regular,Consolas,monospace}
[data-theme=dark]{color-scheme:dark;--bg:#202221;--surface:#202221;--solid:#292c29;--text:#eeeee7;--muted:#a5aaa1;--line:#454943;--green:#eca88d;--soft:#2c302c;--header:#202221}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Microsoft JhengHei",sans-serif;font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.3;letter-spacing:-.025em}a{color:inherit;text-decoration:none}a:hover{color:var(--green)}button,input,textarea{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}svg{display:block}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--green);outline-offset:5px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:fixed;top:-100px;left:20px;padding:12px;background:var(--text);color:var(--bg);z-index:100}.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;z-index:20;background:var(--header);border-bottom:1px solid var(--line)}.header-inner{max-width:1320px;margin:auto;padding:22px 48px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:12px;font-weight:700;line-height:1.3;font-size:19px;white-space:nowrap;letter-spacing:-.03em}.brand-mark{display:grid;place-items:center;background:var(--text);color:var(--bg);width:38px;height:38px;font-family:var(--mono);font-size:20px;font-weight:500;letter-spacing:-.1em;padding-right:3px}.brand small{display:block;color:var(--muted);font-weight:400;font-size:10px;letter-spacing:.09em;margin-top:4px}#site-nav{display:flex;align-items:center;gap:24px;margin-left:auto;font-size:14px;flex-wrap:wrap}#site-nav a{color:var(--muted)}#site-nav a:hover,#site-nav a[aria-current]{color:var(--text)}#site-nav a[aria-current]{text-decoration:underline;text-underline-offset:7px;text-decoration-color:var(--green)}.icon-button{flex-shrink:0;width:36px;height:36px;background:transparent;border:1px solid var(--line);color:var(--text);font-size:21px;display:grid;place-items:center}.icon-button:hover{background:var(--soft)}.menu-toggle{display:none}.sun-icon{display:none}[data-theme=dark] .sun-icon{display:block}[data-theme=dark] .moon-icon{display:none}.site-main{max-width:1320px;margin:auto;padding:0 48px;outline:none}
.eyebrow{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.05em;line-height:1.6;margin-bottom:15px}.home-intro{display:grid;grid-template-columns:1.65fr 1fr;gap:72px;align-items:end;padding:70px 0 62px}.home-intro h1{font-size:clamp(60px,7vw,94px);letter-spacing:-.07em;font-weight:650;line-height:1.1;margin:0 0 26px}.home-intro h1>span{display:inline-block;color:var(--green);font-weight:300;margin-left:12px}.brand-motto{font-size:20px;font-weight:500;letter-spacing:-.03em;margin-bottom:8px}.brand-motto-zh{font-size:15px;color:var(--muted);letter-spacing:.15em;margin-bottom:0}.intro-note{padding-left:28px;border-left:1px solid var(--line);max-width:350px}.intro-index{display:block;color:var(--green);font-size:26px;line-height:1;margin-bottom:17px}.intro-note p{font-size:16px;line-height:1.85;margin-bottom:22px}.intro-note>a{font-size:14px;border-bottom:1px solid var(--text);padding-bottom:5px}.intro-note>a span{margin-left:22px}
.articles-section{border-top:2px solid var(--text);padding:28px 0 72px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:24px}.section-heading .eyebrow{color:var(--green);margin-bottom:7px;font-size:14px}.section-heading h2{font-size:29px;font-weight:550;margin:0}.search-form{display:flex;align-items:center;gap:10px;width:265px;border-bottom:1px solid var(--text);padding:9px 0}.search-form>span{font-size:22px}.search-form input{width:100%;min-width:0;border:0;background:transparent;color:var(--text);font-size:14px;outline-offset:2px}.search-form button{background:transparent;border:0;color:var(--muted);font-size:14px;white-space:nowrap;padding:0 4px}.category-list{display:flex;gap:20px;flex-wrap:wrap;margin:27px 0 24px}.category-chip{font-size:14px;color:var(--muted);padding:3px 0}.category-chip.selected{color:var(--text);font-weight:600}.category-chip span{font-family:var(--mono);font-size:11px;margin-left:8px;color:var(--muted)}
.post-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}.post-card{display:flex;flex-direction:column;min-width:0;border-bottom:1px solid var(--line);padding-bottom:23px}.card-cover{display:block;position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--soft);border:1px solid var(--line)}.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s}.card-cover:hover img{transform:scale(1.025)}.cover-art{background:var(--soft);color:var(--text)}.cover-label{position:absolute;top:24px;left:28px;color:var(--muted);font-size:13px;letter-spacing:.12em}.cover-word{position:absolute;bottom:25px;left:28px;font-family:var(--mono);font-size:68px;font-weight:400;line-height:1;letter-spacing:-.09em}.cover-word small{display:block;font-size:12px;letter-spacing:.08em;font-weight:400;margin-top:17px;color:var(--muted)}.card-body{padding:25px 0 0;flex:1;display:flex;flex-direction:column;min-width:0}.card-category{font-size:13px;color:var(--green);margin-bottom:12px}.card-body h3{font-size:26px;line-height:1.45;font-weight:600;margin-bottom:15px;overflow-wrap:anywhere}.card-excerpt{color:var(--muted);font-size:15px;line-height:1.85;margin-bottom:25px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.card-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:auto;font-size:13px;color:var(--muted)}.card-bottom time{font-family:var(--mono);font-size:12px}.card-bottom a{color:var(--text)}.is-featured{grid-column:1/-1;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;padding-bottom:36px}.is-featured .card-cover{aspect-ratio:16/9}.is-featured .card-body{padding:15px 0}.is-featured .card-body h3{font-size:clamp(28px,2.6vw,37px);line-height:1.45;margin-bottom:20px}.is-featured .card-excerpt{font-size:16px}.is-featured .cover-word{font-size:92px}.page-navigator{display:flex;justify-content:center;gap:10px;list-style:none;padding:0;margin:38px 0 0}.page-navigator a,.page-navigator span{display:block;padding:6px 12px;border:1px solid var(--line);font-size:14px}.page-navigator .current a{background:var(--text);color:var(--bg)}.archive-heading{padding:54px 0 34px}.archive-heading h1{font-size:40px;margin:0;overflow-wrap:anywhere}.empty-state{text-align:center;padding:75px 0;color:var(--muted)}.empty-state h1,.empty-state h3{color:var(--text)}.button{display:inline-flex;padding:10px 18px;background:var(--text);color:var(--bg);font-size:14px}.button:hover{background:var(--green);color:var(--bg)}
.reading-layout{max-width:850px;margin:45px auto 75px;min-width:0}.back-link{font-size:14px;color:var(--muted);display:inline-block;margin-bottom:30px}.reading-card{min-width:0}.article-header{border-bottom:1px solid var(--line);padding-bottom:30px;margin-bottom:32px}.article-header .eyebrow{margin-bottom:13px}.article-header .card-category{font-size:15px}.article-header h1{font-size:clamp(30px,3.4vw,46px);font-weight:600;line-height:1.4;margin:13px 0 24px;overflow-wrap:anywhere}.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--muted)}.author-avatar{display:grid;place-items:center;width:26px;height:26px;background:var(--soft);font-family:var(--mono);font-size:12px;border:1px solid var(--line)}.post-content{font-size:17px;line-height:1.95;overflow-wrap:anywhere}.post-content p{margin-bottom:1.5em}.post-content h2{font-size:27px;margin:1.9em 0 .85em;font-weight:600}.post-content h3{font-size:22px;margin:1.7em 0 .8em}.post-content a{color:var(--green);text-decoration:underline;text-underline-offset:4px}.post-content img{display:block;margin:28px auto}.post-content pre{overflow:auto;background:var(--soft);padding:22px;font-size:14px;line-height:1.7;max-width:100%;white-space:pre;word-break:normal;border:1px solid var(--line)}.post-content code{font-family:var(--mono);background:var(--soft);padding:2px 4px;font-size:.88em}.post-content pre code{padding:0}.post-content blockquote{border-left:2px solid var(--green);padding:4px 0 4px 22px;margin:28px 0;color:var(--muted)}.post-content blockquote p:last-child{margin:0}.post-content table{display:block;overflow:auto;width:100%;border-collapse:collapse;font-size:15px}.post-content td,.post-content th{padding:10px 14px;border:1px solid var(--line)}.article-tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;font-size:13px;color:var(--muted)}.article-tags a{border-bottom:1px solid var(--line)}
.reading-page{display:grid;grid-template-columns:minmax(0,1fr) 275px;column-gap:65px;row-gap:0;align-items:start;margin:40px 0 75px}.reading-page>.back-link{grid-column:1/-1;margin:0 0 30px;justify-self:start}.reading-page .reading-layout{max-width:none;margin:0}.reading-sidebar{position:sticky;top:112px;border-left:1px solid var(--line);padding-left:25px;min-width:0}.reading-tools{max-height:calc(100dvh - 140px);overflow:auto;scrollbar-width:thin;scrollbar-color:var(--line) transparent}.reading-tools summary{display:none}.sidebar-section+.sidebar-section{border-top:1px solid var(--line);padding-top:23px;margin-top:23px}.sidebar-section h2{font-size:17px;font-weight:600;margin-bottom:14px;letter-spacing:0}.sidebar-section .eyebrow{font-size:11px;margin-bottom:4px}.article-toc ol,.sidebar-posts,.sidebar-categories{list-style:none;padding:0;margin:0}.article-toc ol{max-height:240px;overflow:auto}.article-toc a{display:block;padding:7px 0;font-size:15px;color:var(--muted);overflow-wrap:anywhere}.article-toc a[aria-current]{color:var(--green);font-weight:600}.toc-subheading a{padding-left:14px}.toc-empty,.sidebar-top{font-size:13px;color:var(--muted)}.toc-empty[hidden]{display:none}.sidebar-top{display:inline-block;margin-top:13px}.sidebar-search{display:flex;gap:8px}.sidebar-search input{width:100%;min-width:0;border:1px solid var(--line);background:transparent;color:var(--text);padding:8px;font-size:14px}.sidebar-search button{border:1px solid var(--line);background:var(--soft);color:var(--text);padding:7px 9px;font-size:14px;white-space:nowrap}.sidebar-posts li+li{margin-top:17px}.sidebar-posts a{font-size:15px;display:block;line-height:1.65;overflow-wrap:anywhere}.sidebar-posts a[aria-current]{color:var(--green)}.sidebar-posts time{display:block;color:var(--muted);font-family:var(--mono);font-size:11px;margin-top:4px}.sidebar-categories li+li{margin-top:9px}.sidebar-categories a{display:flex;justify-content:space-between;font-size:15px}.sidebar-categories span{font-family:var(--mono);color:var(--muted);font-size:12px}.sidebar-rss{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:20px;margin-top:23px;font-size:14px}.reading-card .post-content h2,.reading-card .post-content h3,#article-start{scroll-margin-top:115px}
.post-near{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin:40px 0 0;border-top:1px solid var(--line)}.post-near>div{position:relative;padding:22px 0;min-width:0;overflow-wrap:anywhere;font-size:16px}.post-near>div:last-child{text-align:right}.post-near span{display:block;color:var(--muted);font-size:13px;margin-bottom:9px}.post-near a::after{content:"";position:absolute;inset:0}.post-near>div:has(a):hover a{color:var(--green)}.post-near>div:focus-within{outline:2px solid var(--green);outline-offset:4px}.post-near a:focus-visible{outline:none}
.lab-friend-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 30px;margin-top:28px}.lab-friend-card{display:flex;align-items:center;gap:16px;padding:25px 0;border-top:1px solid var(--line);min-width:0}.lab-friend-card>img{width:48px;height:48px;object-fit:cover;flex-shrink:0;filter:grayscale(.15)}.lab-friend-card>div{flex:1;min-width:0}.lab-friend-card h2{font-size:18px;margin:0 0 7px;overflow-wrap:anywhere;line-height:1.5}.lab-friend-card p{font-size:14px;line-height:1.7;color:var(--muted);margin:0;overflow-wrap:anywhere;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lab-friend-card>span{font-size:20px;color:var(--muted)}.links-empty{color:var(--muted)}
#comments:not(:empty){border-top:1px solid var(--line);margin-top:30px;padding-top:30px}#comments h3{font-size:20px;font-weight:600}#comments label{display:block;font-size:14px;margin-bottom:6px}#comments input,#comments textarea{max-width:100%;width:100%;background:transparent;border:1px solid var(--line);color:var(--text);padding:10px 12px}#comments button{background:var(--text);color:var(--bg);border:0;padding:11px 20px}#comments ol{padding-left:22px}#comments .comment-meta{font-size:13px;color:var(--muted)}.comment-body{padding:17px 0;border-bottom:1px solid var(--line)}
.site-footer{border-top:1px solid var(--line)}.footer-inner{max-width:1320px;margin:auto;padding:35px 48px 25px;display:grid;grid-template-columns:1fr auto;gap:25px}.footer-brand{font-size:22px;font-weight:600;letter-spacing:-.04em}.footer-inner p{font-size:13px;color:var(--muted);margin:6px 0 0}.footer-links{display:flex;gap:25px;align-items:center;font-size:13px;color:var(--muted)}.footer-bottom{grid-column:1/-1;display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:18px;font-size:11px;color:var(--muted);font-family:var(--mono)}.history-code{letter-spacing:.1em}
@media(max-width:1150px){.header-inner,.site-main,.footer-inner{padding-left:32px;padding-right:32px}#site-nav{gap:17px}.header-inner{gap:18px}.brand small{display:none}.home-intro{gap:45px}.home-intro h1{font-size:76px}.reading-page{grid-template-columns:minmax(0,1fr) 240px;column-gap:35px}.reading-sidebar{padding-left:20px}}
@media(max-width:999px){.reading-page{grid-template-columns:minmax(0,1fr);gap:24px;margin-top:30px}.reading-page>.back-link{margin:0}.reading-sidebar{position:static;grid-row:2;border:1px solid var(--line);padding:0}.reading-tools{max-height:none;overflow:visible}.reading-tools summary{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;cursor:pointer;list-style:none;font-size:15px}.reading-tools summary::-webkit-details-marker{display:none}.reading-tools[open] summary{border-bottom:1px solid var(--line)}.reading-tools[open] summary span{transform:rotate(180deg)}.reading-tools-body{padding:22px}.home-intro{gap:32px;grid-template-columns:1.3fr 1fr}.home-intro h1{font-size:64px}.brand-motto{font-size:17px}.intro-note{padding-left:22px}.is-featured{gap:27px}.is-featured .card-body h3{font-size:28px}.is-featured .card-body{padding:4px 0}}
@media(max-width:800px){.header-inner{flex-wrap:wrap;padding-top:16px;padding-bottom:16px}.theme-toggle{margin-left:auto}#site-nav{order:5;margin:0;flex-basis:100%;justify-content:flex-start;gap:20px}.home-intro{padding:45px 0}.home-intro h1{font-size:57px}.home-intro{gap:25px}.intro-note p{font-size:15px}.section-heading h2{font-size:25px}.search-form{width:230px}.is-featured .card-body h3{font-size:25px}.is-featured .card-excerpt{font-size:15px}.is-featured .cover-word{font-size:75px}.is-featured .card-cover{aspect-ratio:auto;min-height:255px}}
@media(max-width:600px){.header-inner,.site-main,.footer-inner{padding-left:22px;padding-right:22px}.header-inner{gap:10px;flex-wrap:wrap}.brand{font-size:18px}.brand-mark{width:32px;height:32px;font-size:18px}.menu-toggle{display:grid;margin-left:auto}.theme-toggle{margin-left:0}.icon-button{width:33px;height:33px}.header-inner #site-nav{display:none;gap:18px;font-size:14px;padding-top:14px;margin-top:5px;border-top:1px solid var(--line)}.header-inner #site-nav.is-open{display:flex}.home-intro{grid-template-columns:1fr;padding:37px 0 36px;gap:28px}.home-intro .eyebrow{font-size:11px;margin-bottom:13px}.home-intro h1{font-size:clamp(47px,13vw,68px);margin-bottom:20px}.brand-motto{font-size:17px;line-height:1.7}.brand-motto-zh{font-size:14px;letter-spacing:.11em}.intro-note{padding:0;border:0;max-width:none}.intro-index{display:none}.intro-note p{font-size:15px;line-height:1.9;margin-bottom:15px}.intro-note>a{font-size:13px}.articles-section{padding:23px 0 40px}.section-heading{flex-direction:column;align-items:start;gap:20px}.section-heading .eyebrow{font-size:13px}.section-heading h2{font-size:23px}.search-form{width:100%}.category-list{gap:17px;margin:21px 0}.post-grid{grid-template-columns:1fr;gap:28px}.is-featured{display:flex;gap:0;padding-bottom:25px}.is-featured .card-cover{aspect-ratio:16/10;min-height:0}.is-featured .card-body{padding:23px 0 0}.card-cover{aspect-ratio:16/10}.cover-label{top:20px;left:22px}.cover-word,.is-featured .cover-word{font-size:67px;bottom:22px;left:22px}.card-body h3,.is-featured .card-body h3{font-size:25px}.card-excerpt,.is-featured .card-excerpt{font-size:15px}.card-bottom{font-size:13px}.archive-heading{padding:35px 0 25px}.archive-heading h1{font-size:30px}.reading-layout{margin:30px auto 45px}.reading-page{margin-bottom:45px}.article-header{padding-bottom:23px;margin-bottom:25px}.article-header h1{font-size:30px;margin-bottom:20px}.post-content{font-size:16px;line-height:1.95}.post-content h2{font-size:24px}.post-content h3{font-size:20px}.post-near{gap:20px;margin-top:30px}.post-near>div{font-size:15px}.post-near span{font-size:12px}.lab-friend-grid{grid-template-columns:1fr}.lab-friend-card{padding:23px 0}.footer-inner{grid-template-columns:1fr;gap:22px;padding-top:27px}.footer-bottom{flex-wrap:wrap;gap:12px;line-height:1.8;font-size:11px}.footer-links{font-size:13px}.back-link{margin-bottom:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Iteration 2: let actual content lead when an article has no cover. */
.is-featured.no-cover{display:block;padding-bottom:30px}
.is-featured.no-cover .card-body{display:grid;grid-template-columns:1.25fr 1fr;grid-template-areas:"category excerpt" "title excerpt" "meta meta";gap:6px 65px;padding:15px 0 0}
.is-featured.no-cover .card-category{grid-area:category;margin:0 0 8px}
.is-featured.no-cover .card-category::before{content:"最新 / ";color:var(--muted)}
.is-featured.no-cover h3{grid-area:title;margin:0;font-size:38px;max-width:620px}
.is-featured.no-cover .card-excerpt{grid-area:excerpt;align-self:center;font-size:17px;max-width:450px;margin:0}
.is-featured.no-cover .card-bottom{grid-area:meta;margin-top:27px}
.post-card.no-cover:not(.is-featured) .card-body{border-top:2px solid var(--text);padding:25px 0 0}
.post-card.no-cover:not(.is-featured) h3{font-size:32px;max-width:440px}
.post-card.no-cover:not(.is-featured) .card-excerpt{max-width:420px;font-size:16px}
.post-card.no-cover:not(.is-featured) .card-bottom{padding-top:35px}
.footer-inner p{font-size:14px}.footer-bottom{font-size:12px}.sidebar-posts time{font-size:12px}
@media(max-width:999px){.is-featured.no-cover .card-body{gap:6px 30px;grid-template-columns:1.2fr 1fr}.is-featured.no-cover h3{font-size:31px}.is-featured.no-cover .card-excerpt{font-size:16px}}
@media(max-width:600px){.is-featured.no-cover .card-body{display:flex;gap:0;padding-top:4px}.is-featured.no-cover .card-category{margin-bottom:14px}.is-featured.no-cover h3{font-size:28px;margin-bottom:18px}.is-featured.no-cover .card-excerpt{align-self:start;font-size:15px;margin-bottom:23px}.is-featured.no-cover .card-bottom{width:100%;margin-top:0}.post-card.no-cover:not(.is-featured) .card-body{border-top:0;padding-top:0}.post-card.no-cover:not(.is-featured) h3{font-size:26px}.post-card.no-cover:not(.is-featured) .card-excerpt{font-size:15px}.post-card.no-cover:not(.is-featured) .card-bottom{padding-top:0}.footer-bottom{font-size:11px}}

/* Iteration 3: compact secondary entries and a stable footer on short pages. */
body{min-height:100dvh;display:flex;flex-direction:column}.site-main{width:100%;flex:1}.site-header,.site-footer{flex-shrink:0}
@media(min-width:801px){.post-card:not(.is-featured):not(.no-cover){display:grid;grid-template-columns:160px minmax(0,1fr);gap:24px;align-items:start}.post-card:not(.is-featured):not(.no-cover) .card-cover{aspect-ratio:1/1}.post-card:not(.is-featured):not(.no-cover) .card-body{padding-top:0;height:100%}.post-card:not(.is-featured) .card-body h3{font-size:26px}.post-card.no-cover:not(.is-featured) .card-body{padding-top:17px}.post-card:not(.is-featured) .card-bottom{padding-top:18px;font-size:12px}.post-card:not(.is-featured) .card-excerpt{font-size:15px;margin-bottom:15px}}
@media(min-width:801px) and (max-width:1050px){.post-card:not(.is-featured):not(.no-cover){grid-template-columns:120px minmax(0,1fr);gap:20px}.post-card:not(.is-featured) .card-body h3{font-size:23px}.card-bottom{flex-wrap:wrap}}