@charset "UTF-8";
:root{color-scheme:dark;--bg:#080e17;--panel:#0e1723;--panel2:#111d2b;--ink:#e9edf1;--muted:#92a1b4;--faint:#627388;--line:#243140;--mint:#62e0c8;--amber:#e9b769;--blue:#79aff5;--violet:#b7a0ef;--accent:var(--mint);--mono:"Cascadia Code",Consolas,monospace;--sans:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button,input,select{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:2px solid var(--mint);outline-offset:5px}::selection{background:#62e0c833;color:#fff}svg{display:block}button{border:1px solid var(--line);background:#152232;border-radius:5px;padding:9px 15px;transition:border-color .2s,background .2s}button:hover:not(:disabled){border-color:var(--accent);background:#1a2d3b}input[type=range]{accent-color:var(--accent);min-width:0;cursor:pointer;width:100%}select{background:var(--panel);border:1px 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@media(min-width:1600px){.exhibit{gap:90px}.hero{padding-left:5%;padding-right:5%}}
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@media(max-width:800px){html{scroll-padding-top:80px}.site-header{height:76px;padding:0 5%}.site-header nav{gap:18px;font-size:12px}.site-header nav a:last-child{display:none}.github-link{font-size:12px}.brand{font-size:18px}.hero{padding:45px 6% 45px;grid-template-columns:1fr;gap:40px}.hero-copy{max-width:620px}.hero-diagram{transform:none;max-width:650px}.hero-diagram svg{max-height:320px}.hero h1{font-size:55px;line-height:1.3;letter-spacing:-2px}.hero-index{display:none}.hero-stats{margin-top:30px}.chapter-ribbon{gap:8px;padding:15px 5%;font-size:10px}.chapter-ribbon i{display:none}.exhibit{display:block;padding:0 5%}.timeline-sidebar{position:sticky;top:0;background:#080e17f5;backdrop-filter:blur(12px);z-index:10;padding:13px 0 10px;margin-bottom:35px;border-bottom:1px solid var(--line)}.sidebar-heading,.sidebar-note,.progress-track{display:none}#era-navigation{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none}.era-link{border:1px solid var(--line);padding:7px 10px;white-space:nowrap;border-radius:4px;flex-shrink:0}.era-link:before{display:none}.era-link.active{border-color:#62e0c866;background:#62e0c80a}.era-link span{font-size:10px;margin-bottom:2px}.era-link strong{font-size:11px}.chapter-heading{margin-bottom:36px;padding-top:15px}.chapter-number{font-size:60px}.milestone{scroll-margin-top:95px}.lab-grid{grid-template-columns:minmax(0,1fr) 180px}.closing{padding:75px 25px}.closing h2{font-size:30px}footer{flex-wrap:wrap;gap:18px}footer p{margin-left:auto;text-align:right}footer>a:last-child{width:100%;border-top:1px solid var(--line);padding-top:16px}}
@media(max-width:520px){.site-header nav{display:none}.brand-symbol{font-size:30px}.hero h1{font-size:44px}.hero-description{font-size:14px}.hero .eyebrow{font-size:10px;letter-spacing:1.3px}.hero-actions{gap:15px}.hero .button{padding:12px 16px;gap:15px}.hero-stats{gap:19px;font-size:10px}.hero-stats strong{font-size:19px}.hero-diagram svg{max-height:270px}.diagram-header{padding:12px;font-size:8px}.diagram-tag{font-size:10px}.diagram-footer{padding:12px}.diagram-footer span:last-child{font-size:10px}.chapter-ribbon{font-size:9px;gap:5px}.chapter-heading{gap:8px}.chapter-heading h2{font-size:24px}.chapter-heading p{font-size:12px}.chapter-number{font-size:47px}.milestone-heading{gap:15px;margin-bottom:18px;flex-wrap:wrap}.milestone-year{font-size:39px;min-width:86px}.milestone-heading h3{font-size:20px}.milestone-heading>div:nth-child(2){flex:1;min-width:160px}.node-index{display:none}.milestone-en{font-size:9px;letter-spacing:1px}.tagline{font-size:15px}.story{font-size:14px}.milestone{padding-bottom:35px;margin-bottom:35px}.lab-header{padding:12px}.lab-label{font-size:9px;gap:7px}.lab-label strong{font-size:13px}.lab-badge{font-size:9px}.lab-body{padding:15px}.lab-grid{grid-template-columns:1fr;gap:15px}.lab-controls{gap:12px}.lab-controls .button-row{display:flex}.lab-controls .lab-status{min-height:0}.lab-caption{padding:9px 12px;font-size:10px}.lab-description{font-size:12px}.context-panel{padding:20px}.detail-grid{padding:3px 15px 15px}.attention-sentence{gap:6px}.attention-sentence button{font-size:12px;padding:7px 9px}.quiz-options{flex-direction:column}.quiz-options button{font-size:12px}.closing h2{font-size:26px}.closing-facts{gap:10px}footer{padding:24px 5%}.footer-brand span{display:block;margin-left:0;margin-top:3px}.pixel-pair{gap:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.hero-diagram{transform:none}}

.lab-status{white-space:pre-line}.story{font-size:16px}.lab-controls button,.control-row button,.chat-form button{font-size:13px}.lab-controls label{display:flex;flex-direction:column;gap:5px}
.diffusion-dataset{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:4px}.diffusion-dataset canvas{width:100%;height:auto;aspect-ratio:1;min-width:0}
#perceptron canvas{touch-action:none}.sample-editor summary{font-size:12px;cursor:pointer;color:var(--accent)}.sample-form{display:grid;gap:9px;margin-top:10px}.sample-form input{width:100%;min-width:0;background:var(--bg);border:1px solid var(--line);border-radius:4px;padding:6px 9px;font-size:13px}