:root{--paper:#f9f8f4;--ink:#293b33;--muted:#788078;--line:#dedfd5;--accent:#53745a;--serif:Georgia,"Songti SC","Noto Serif CJK SC",serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}a:focus-visible{outline:2px solid var(--accent);outline-offset:5px}.skip{position:absolute;left:20px;top:-60px;background:white;padding:6px 20px}.skip:focus{top:0}.header,main,footer{width:min(1120px,calc(100% - 96px));margin:auto}.header{display:flex;justify-content:space-between;align-items:center;height:108px;border-bottom:1px solid var(--line)}.brand{font-size:25px;font-weight:650;letter-spacing:-1px}.brand span{font:12px/1.5 system-ui;color:var(--muted);letter-spacing:1px;margin-left:10px}nav{display:flex;gap:30px;font-size:13px}.hero{padding:76px 0 65px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--muted);font-weight:600}.small-line{display:inline-block;vertical-align:middle;width:28px;height:1px;background:var(--line);margin:0 14px}h1{font:500 clamp(30px,4vw,48px)/1.5 var(--serif);letter-spacing:1px;margin:22px 0}.hero>p:last-child{color:var(--muted);font-size:14px}.accent{color:#9b704e}.home-grid{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:78px;padding-bottom:100px}.section-heading{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:14px}.section-heading h2,.apps-aside h2{font:500 23px var(--serif);margin:0}.section-heading>span{font-size:12px;color:var(--muted)}.year{font:italic 30px var(--serif);margin:30px 0 16px}.timeline{list-style:none;padding:0 0 0 22px;margin-left:6px;border-left:1px solid var(--line)}.timeline li{position:relative}.timeline li:before{content:"";position:absolute;left:-27px;top:10px;width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px var(--paper)}time{font-size:12px;letter-spacing:1px;color:var(--muted)}.entry{padding:20px 0 35px}.tag{font-size:11px;color:var(--accent);background:#e9eee6;padding:4px 9px}.entry h3{font:500 25px/1.65 var(--serif);margin:14px 0}.entry p{color:#777e76;font-size:14px;margin:0 0 20px}.read,.all-apps{font-size:12px;letter-spacing:1px;border-bottom:1px solid #aeb8aa;padding-bottom:5px}.read span{margin-left:16px}.apps-aside{border-left:1px solid var(--line);padding-left:30px}.apps-aside>.eyebrow{margin-top:0}.apps-aside>p:not(.eyebrow){font-size:12px;color:var(--muted)}.app-row{display:flex;align-items:center;gap:16px;padding:23px 0;border-bottom:1px solid var(--line)}.app-icon{font:26px var(--serif);background:#ebeee5;flex:0 0 44px;height:44px;text-align:center;line-height:44px;border-radius:6px}.app-row>span:nth-child(2){flex:1}.app-row strong{display:block;font-size:14px;font-weight:500}.app-row small{display:block;color:var(--muted);font-size:11px;margin-top:3px}.app-row>span:last-child{color:var(--muted)}.all-apps{display:inline-block;margin-top:22px}.note{margin-top:45px;border-top:1px solid var(--line);padding-top:25px}.note p{font:italic 20px/1.8 var(--serif);color:var(--muted)}footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:28px 0 36px;font-size:11px;color:var(--muted)}.dot{padding:0 8px}.compact{padding-bottom:30px}.app-list{max-width:800px;min-height:40vh;padding-bottom:80px}.app-list .app-row{padding:26px 0}.app-list strong{font:22px var(--serif)}.app-list small{font-size:13px}.article-head{max-width:850px;padding:44px 0 40px}.back{font-size:12px;color:var(--muted)}.article-head .eyebrow{margin-top:45px}.article-head h1{font-size:36px;line-height:1.55}.dek{color:var(--muted);max-width:720px}.article-grid{display:grid;grid-template-columns:170px minmax(0,1fr);gap:65px;border-top:1px solid var(--line);padding:40px 0 90px}.article-grid aside{align-self:start;position:sticky;top:30px}.article-grid nav{flex-direction:column;gap:12px;margin-top:20px;color:var(--muted);font-size:12px}.prose{max-width:790px;min-width:0;font-size:16px;line-height:1.95}.prose>p:first-child{margin-top:0}.prose h2{font:600 27px/1.5 var(--serif);margin:52px 0 24px;border-bottom:1px solid var(--line);padding-bottom:12px}.prose h3{font-size:21px;margin-top:35px}.prose h4{font-size:17px;margin-top:28px}.prose a{color:#47705b;text-decoration:underline;text-underline-offset:3px}.prose p,.prose ul,.prose ol{margin-bottom:22px}.prose li{margin:10px 0}.prose table{border-collapse:collapse;width:100%;font-size:13px;margin:25px 0;display:block;overflow-x:auto}.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left;min-width:100px}.prose th{background:#eef0e8}.prose code{font:13px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;background:#eceee7;padding:2px 5px;border-radius:3px;overflow-wrap:anywhere}.prose pre{background:#edf0e9;border:1px solid #dde2d6;padding:20px;overflow:auto;border-radius:6px;line-height:1.65}.prose pre code{background:transparent;padding:0;overflow-wrap:normal}.prose blockquote,.markdown-alert{margin:24px 0;padding:12px 20px;border-left:3px solid #80977d;background:#eff2eb;font-size:14px}.markdown-alert-title{font-weight:650;color:#52724e;margin:0!important;display:flex;gap:8px;align-items:center}.markdown-alert-title svg{width:16px;fill:currentColor}.markdown-alert p:last-child{margin-bottom:0}.markdown-alert-important{border-color:#9a8067;background:#f2eee8}.prose .mermaid{background:transparent;border:0;box-shadow:none;text-align:center}.prose .mermaid svg{background:transparent!important}.mermaid svg{max-width:100%;height:auto}.endmark{margin:60px 0 35px;text-align:center;color:var(--muted);font-size:12px;letter-spacing:5px}@media(max-width:760px){.header,main,footer{width:calc(100% - 40px)}.header{height:80px}.brand span{display:none}nav{gap:20px;font-size:12px}.hero{padding:42px 0}.hero h1{font-size:31px}.eyebrow{font-size:10px;letter-spacing:1px}.home-grid{grid-template-columns:1fr;gap:30px;padding-bottom:55px}.apps-aside{border-left:0;border-top:1px solid var(--line);padding:25px 0 0}.note{display:none}.entry h3{font-size:23px}.article-head h1{font-size:29px}.article-grid{display:block;padding-top:20px}.article-grid aside{position:static;margin-bottom:30px}.article-grid nav{flex-direction:row;flex-wrap:wrap;gap:12px 18px;margin-top:10px}.prose{font-size:15px}.prose h2{font-size:24px}.prose pre{padding:14px}.prose table{font-size:12px}footer{flex-wrap:wrap;font-size:10px}.app-list strong{font-size:20px}}
/* Interaction and rich-document presentation */
a,button{transition:color .2s,background .2s,transform .2s,box-shadow .2s}.header nav a{position:relative}.header nav a:after{content:"";position:absolute;left:0;right:0;bottom:-5px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .25s}.header nav a:hover:after{transform:scaleX(1)}.app-row:hover{transform:translateX(4px);background:#eef1e8}.entry h3 a:hover{color:#568369}.entry .read:hover span{display:inline-block;transform:translate(2px,-2px)}.hero{animation:arrive .7s ease-out both}.hero h1 .accent{display:inline-block;animation:arrive 1.1s ease-out both}.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s,transform .5s}.reveal.visible{opacity:1;transform:none}@keyframes arrive{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.reading-progress{position:fixed;top:0;left:0;height:3px;background:#638461;z-index:20;width:0}.prose pre{position:relative}.copy-code{position:sticky;float:right;bottom:0;right:0;border:1px solid #c9d4c3;border-radius:5px;background:#f7faf1;color:#50614b;font-size:11px;padding:4px 9px;cursor:pointer}.article-grid nav .current{color:#355c40;font-weight:650}.subscribe-panel{max-width:740px;min-height:50vh;margin:0 0 80px;padding:30px;border:1px solid var(--line);background:#fffdf8;border-radius:10px}.subscribe-panel h2{font:500 24px var(--serif)}.subscribe-panel label{font-size:12px;color:var(--muted)}.copy-row{display:flex;gap:10px;margin:10px 0}.copy-row input{flex:1;min-width:0;padding:12px;border:1px solid var(--line);background:var(--paper);font:13px monospace}.copy-row button{border:0;padding:12px;background:#3d6049;color:white;border-radius:5px;cursor:pointer}.subscribe-panel a{text-decoration:underline}.subscribe-panel hr{border:0;border-top:1px solid var(--line);margin:35px 0}.document-page{width:min(1460px,calc(100% - 80px))}.document-page .article-head{max-width:1060px}.document-page .article-grid{grid-template-columns:185px minmax(0,1fr);gap:35px}.document-page .prose{max-width:none}.prose img{max-width:100%;height:auto;display:block;margin:12px auto;cursor:zoom-in;border-radius:5px}.prose figure{margin:20px 0}.prose figcaption{color:var(--muted);font-size:12px;text-align:center}.prose video{width:100%;max-height:650px;background:#18221d}.doc-grid{display:grid;grid-template-columns:var(--columns);gap:20px;align-items:start;margin:24px 0}.doc-column{min-width:0}.doc-column>p:first-child{margin-top:0}.doc-callout{display:flex;gap:12px;border:1px solid #dde6d6;border-radius:7px;padding:18px;background:#f0f4e9;margin:24px 0}.doc-callout>div{min-width:0}.doc-callout p:first-child{margin-top:0}.doc-callout p:last-child{margin-bottom:0}.callout-emoji{font-size:20px}.table-scroll{overflow:auto;max-width:100%;margin:26px 0;border:1px solid var(--line);border-radius:6px}.prose .table-scroll table{display:table;margin:0;min-width:100%;width:100%;border-style:hidden;overflow:visible}.imported-doc table td,.imported-doc table th{vertical-align:top;min-width:170px;max-width:650px}.imported-doc table pre{max-height:400px;max-width:600px;min-width:260px;white-space:pre-wrap;overflow-wrap:anywhere}.imported-doc table img{min-width:180px;max-width:420px;max-height:600px;object-fit:contain}.imported-doc table .doc-grid{min-width:400px}.imported-doc .table-scroll .table-scroll{max-width:650px}.imported-doc table p{margin-bottom:12px}.imported-doc h1{font-size:32px;margin:50px 0 25px}.imported-doc h6{font-size:16px;margin:28px 0 16px}.imported-doc .code-caption{font-size:12px;color:var(--muted);margin-bottom:-12px}.bookmark,.attachment{display:block;border:1px solid var(--line);padding:15px;border-radius:6px}.image-viewer{border:0;padding:52px 20px 20px;max-width:96vw;max-height:96vh;background:#f9faf6;border-radius:9px}.image-viewer::backdrop{background:#15251de0;backdrop-filter:blur(5px)}.image-viewer img{max-width:90vw;max-height:80vh;object-fit:contain}.image-viewer button{position:absolute;right:15px;top:12px;padding:6px 14px;background:white;border:1px solid #ccd8c5;border-radius:5px;cursor:pointer}@media(max-width:760px){.document-page{width:calc(100% - 32px)}.document-page .article-grid{display:block}.doc-grid{grid-template-columns:1fr!important}.copy-row{flex-direction:column}.subscribe-panel{padding:20px}.imported-doc table td{min-width:150px}.imported-doc table pre{min-width:220px;max-width:80vw}.imported-doc h1{font-size:26px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}
/* Precise dates and source-preserving document controls. */
.timeline .year{font:12px/1.5 system-ui;color:#92988e;margin:24px 0 8px;letter-spacing:2px}.timeline time{display:flex;gap:14px;align-items:baseline;margin-top:20px}.timeline time strong{font:600 25px/1.4 var(--serif);color:var(--ink);letter-spacing:0}.timeline time span{font:500 14px ui-monospace,monospace;color:#647761}.owner-edit{font-size:11px;color:var(--muted);border-bottom:1px dotted var(--line)}.prose .code-block{margin:22px 0;border:1px solid #d5dce4;background:#f6f8fa;border-radius:8px;overflow:hidden}.code-block summary{cursor:pointer;padding:10px 16px;font:12px/1.5 ui-monospace,monospace;color:#526072;background:#eef1f5}.prose .code-block pre{margin:0;border:0;border-radius:0;background:#f6f8fa;padding:18px;white-space:pre;max-height:600px;color:#24292e}.prose .code-block pre.wrap-code{white-space:pre-wrap;overflow-wrap:anywhere}.prose pre code{font-size:13px;color:inherit}.hljs-comment,.hljs-quote{color:#6a737d}.hljs-keyword,.hljs-selector-tag,.hljs-literal{color:#d73a49}.hljs-string,.hljs-regexp{color:#032f62}.hljs-title,.hljs-section,.hljs-function{color:#6f42c1}.hljs-number,.hljs-attr,.hljs-symbol{color:#005cc5}.hljs-bullet,.hljs-name{color:#22863a}.hljs-strong{font-weight:bold}.hljs-emphasis{font-style:italic}.section-block{margin:25px 0}.section-block>summary{cursor:pointer;list-style:none;display:flex;align-items:baseline;gap:12px}.section-block>summary:before{content:'▸';font-size:14px;color:#819078}.section-block[open]>summary:before{content:'▾'}.prose .section-block>summary h2{flex:1;margin:12px 0 20px}.board-crop{width:100%;background:white;border-radius:6px}.imported-doc table .board-crop img{min-width:0;max-height:none}.prose .board-crop img{border-radius:0}.code-block summary:focus-visible,.section-block>summary:focus-visible{outline:2px solid var(--accent)}
.timeline li{padding:5px 14px 10px 0;border-radius:8px}.timeline li:hover{background:#f0f2e9}.entry-link:after{content:"";position:absolute;inset:0;z-index:1;cursor:pointer}.entry-link:focus-visible:after{outline:2px solid var(--accent);outline-offset:4px;border-radius:8px}.preview-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:20px 0;position:relative;z-index:2}.preview-gallery[data-count="1"]{max-width:520px}.preview-gallery figure{margin:0;min-width:0;pointer-events:none}.preview-image{position:relative;aspect-ratio:16/10;overflow:hidden;background:#fff;border:1px solid #e2e6dc;border-radius:8px;pointer-events:auto}.preview-gallery img{display:block;width:100%;height:100%;object-fit:cover;cursor:zoom-in;transition:filter .2s}.preview-gallery img:hover{filter:brightness(1.04)}.preview-gallery figcaption{font-size:10px;color:#959c90;margin-top:5px}.preview-gallery img:focus-visible{outline:3px solid var(--accent);outline-offset:-3px}

/* Compact timeline: text and media share a row. */
.home-grid{grid-template-columns:minmax(0,1fr) 230px;gap:40px}.timeline{margin-top:20px}.timeline>li{padding:14px 12px 18px 0;margin-bottom:12px}.timeline .year{font-size:11px;margin:0 0 4px;letter-spacing:2px}.timeline time{display:flex;align-items:baseline;gap:10px;margin-bottom:8px}.timeline time strong{font-size:23px}.timeline time span{font-size:13px}.entry{display:grid;grid-template-columns:minmax(0,1fr) minmax(160px,36%);align-items:center;gap:20px;padding:0 0 12px}.entry:not(:has(.preview-gallery)){grid-template-columns:1fr}.entry-copy{min-width:0}.entry h3{font-family:system-ui,-apple-system,"PingFang SC",sans-serif;font-size:21px;line-height:1.45;margin:7px 0 8px}.entry p{font-size:13px;line-height:1.65;margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.entry .read{font-size:11px}.entry .tag{font-size:10px;padding:2px 6px}.entry .preview-gallery{width:100%;max-width:none;height:140px;margin:0;gap:5px;grid-template-columns:1fr;grid-template-rows:1fr}.entry .preview-gallery figure{position:relative;min-height:0;height:100%;overflow:hidden;border-radius:7px}.entry .preview-image{width:100%;height:100%;aspect-ratio:auto!important;border-radius:0}.entry .preview-gallery figcaption{position:absolute;left:5px;bottom:4px;margin:0;background:#17251dbd;color:white;padding:1px 5px;border-radius:3px;font-size:9px}.entry .preview-gallery[data-count="2"]{grid-template-columns:1fr 1fr}.entry .preview-gallery[data-count="3"]{grid-template-columns:1.35fr 1fr;grid-template-rows:1fr 1fr}.entry .preview-gallery[data-count="3"] figure:first-child{grid-row:1 / 3}.entry .preview-gallery img[data-crop]{position:static!important;width:100%!important;height:100%!important;max-width:100%!important;object-fit:contain;background:white}.entry .preview-gallery img{height:100%}
@media(max-width:1000px){.home-grid{grid-template-columns:1fr}.apps-aside{border-top:1px solid var(--line);padding-top:24px}.entry{grid-template-columns:minmax(0,1fr) minmax(180px,32%)}}
@media(max-width:600px){.timeline>li{padding-right:4px}.entry{grid-template-columns:minmax(0,1fr) 34%;gap:12px}.entry h3{font-size:17px}.entry .preview-gallery{height:105px}.entry p{font-size:12px}.entry .preview-gallery figcaption{font-size:8px;padding:0 3px}.timeline time strong{font-size:21px}.timeline time span{font-size:12px}.entry .preview-gallery[data-count="2"]{grid-template-columns:1fr;grid-template-rows:1fr 1fr}.entry .preview-gallery[data-count="3"]{height:120px}}
.timeline time{margin:0 0 8px}.timeline>li{margin-bottom:0}.timeline .entry{padding-bottom:8px}