:root{--night:#090b19;--panel:#111529;--text:#f4f1ff;--muted:#c0c4d8;--faint:#a9b4ce;--line:#3b405b;--amber:#ffbc7e;--purple:#c2b4ff;--cyan:#9de8ed;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--night);color:var(--text);font:1rem/1.8 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}a,button{touch-action:manipulation}button:disabled{cursor:default;opacity:.55}:focus-visible{outline:2px solid var(--cyan);outline-offset:5px}::selection{background:#594879;color:var(--text)}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}a:hover{color:var(--amber)}.skip{position:fixed;top:-6rem;left:1rem;z-index:10;padding:.6rem 1rem;background:var(--amber);color:var(--night)}.skip:focus{top:1rem}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.lab-header{max-width:1280px;margin:auto;padding:24px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.lab-brand{display:flex;align-items:center;gap:14px;font:600 1.05rem/1.35 var(--display-latin,var(--sans))}.lab-brand>span:last-child>span{display:block;color:var(--muted);font:400 .875rem/1.5 var(--sans);margin-top:4px}.brand-mark{display:grid;place-items:center;width:43px;height:43px;flex-shrink:0;background:#23223b;border:1px solid #706188;color:var(--amber);font:600 1.4rem/1 var(--mono)}.lab-header nav{display:flex;flex-wrap:wrap;gap:12px 24px;font-size:.9375rem;color:var(--muted)}.lab-header nav a{display:inline-flex;align-items:center;min-height:44px;padding-block:6px}.lab-header nav a[aria-current]{color:var(--amber)}
.lab-main{max-width:1280px;margin:auto;padding:56px 40px 80px}.lab-intro{display:grid;grid-template-columns:1fr .85fr;align-items:center;gap:60px;margin-bottom:56px}.lab-intro h1{font:600 clamp(2.5rem,4.3vw,3.8rem)/1.3 var(--display-cjk,var(--sans));letter-spacing:-.025em;margin:0 0 20px;text-wrap:balance}.lab-intro h1 span{color:var(--purple)}.lab-intro p{color:var(--muted);margin:0;max-width:42ch;font-size:1.0625rem}.lab-intro figure{margin:0;min-width:0}.lab-intro img{display:block;width:100%;height:225px;object-fit:cover;image-rendering:pixelated}.lab-intro figcaption{color:var(--faint);font-size:.875rem;margin-top:15px}
.lab-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:40px;align-items:start;scroll-margin-top:24px}.question-picker{position:sticky;top:28px;min-width:0}.question-picker h2{font-size:1rem;font-weight:600;line-height:1.6;margin:0 0 16px}.question-tabs{display:flex;flex-direction:column;gap:0}.question-tabs button{min-width:0;min-height:84px;text-align:left;padding:18px 14px;background:transparent;color:var(--muted);border:0;border-top:1px solid var(--line);line-height:1.65}.question-tabs button:last-child{border-bottom:1px solid var(--line)}.question-tabs span{display:block;font-weight:550}.question-tabs small{display:block;font-size:.8125rem;color:var(--faint);margin-top:5px}.question-tabs button[aria-selected=true]{color:var(--amber);background:#191d32;box-shadow:inset 0 2px var(--amber)}.question-tabs button[aria-selected=true] small{color:#dbc5b7}.question-tabs button:hover{background:#151a2d}.local-note{font-size:.875rem;color:var(--faint);margin:26px 0 0;max-width:28ch}.bench{min-width:0;border-top:1px solid var(--purple);background:var(--panel);padding:30px}.experiment{min-width:0}.experiment-heading{margin-bottom:22px}.experiment-heading h2{font-size:clamp(1.55rem,2.4vw,2rem);line-height:1.5;letter-spacing:-.02em;margin:0 0 14px;text-wrap:balance}.experiment-heading p{color:var(--muted);margin:0;max-width:70ch}.data-note{font-size:.8125rem;color:var(--faint);padding-block:14px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 0 26px}.operation-layout{display:grid;grid-template-columns:1.05fr 1fr;gap:32px;align-items:start}.operation,.result{min-width:0}.experiment h3{font-size:1.0625rem;font-weight:600;line-height:1.6;margin:0 0 17px}.record-head,.record-row{display:grid;grid-template-columns:28px minmax(0,1fr) 76px;gap:10px;align-items:center}.record-head{font-size:.8125rem;color:var(--faint);margin-bottom:9px}.record-row{padding-block:9px}.record-id{font:1rem/1.5 var(--mono);color:var(--purple)}input[type=number],select{width:100%;min-width:0;min-height:44px;background:#090f20;color:var(--text);border:1px solid #656780;padding:7px 8px;font-size:.9375rem;border-radius:0}input[type=number]:disabled{background:#191d2e;color:#8d99b4;border-color:var(--line)}input[aria-invalid=true]{border-color:var(--amber)}.input-help{font-size:.875rem;color:var(--faint);margin:16px 0}.validation{font-size:.875rem;color:var(--amber);margin:0 0 15px;overflow-wrap:anywhere}.validation:empty{display:none}.reset-button,.primary-button{min-height:44px;padding:9px 15px;background:#1d2137;border:1px solid #70748f;color:var(--muted);font-size:.875rem;line-height:1.5}.reset-button:hover{color:var(--text);border-color:var(--purple)}.primary-button{background:#403144;color:var(--amber);border-color:#aa8074}.primary-button:hover{background:#514054}
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.trace-rail{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);margin-bottom:25px;border:1px solid var(--line)}.trace-rail button{display:flex;align-items:center;gap:9px;min-width:0;min-height:54px;text-align:left;padding:10px;background:#101629;color:var(--muted);border:0;line-height:1.5;font-size:.875rem}.trace-rail button span{font-family:var(--mono);color:var(--faint);font-size:.8125rem}.trace-rail button[aria-pressed=true]{background:#2b2b44;color:var(--cyan)}.trace-rail button[aria-pressed=true] span{color:var(--cyan)}.trace-rail button:hover{color:var(--amber)}.trace-inspection{padding:0 0 6px}.trace-inspection h3{color:var(--cyan);margin-bottom:14px}.artifact-list{margin:0}.artifact-list>div{display:grid;grid-template-columns:95px minmax(0,1fr);gap:20px;padding:14px 0;border-top:1px solid var(--line)}.artifact-list dt{font-size:.875rem;color:var(--faint)}.artifact-list dd{margin:0;color:var(--muted);font-size:.9375rem;overflow-wrap:anywhere}.trace-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.trace-verdict{background:#0d1326;padding:18px 20px;margin:24px 0;color:var(--cyan);font-size:.9375rem}.repair-check{padding-top:20px;border-top:1px solid var(--line)}.repair-check label{display:flex;align-items:start;gap:11px;color:var(--text);font-size:.9375rem;cursor:pointer;min-height:44px}.repair-check>p,.repair-check>div p{color:var(--faint);font-size:.875rem;max-width:70ch;margin:8px 0 0}.repair-check>div{margin-top:21px}.repair-check h3{margin-bottom:9px}
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.lab-footer{max-width:1280px;margin:auto;padding:26px 40px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;color:var(--faint);font-size:.875rem}.noscript-note{color:var(--amber);margin-top:28px}.noscript-note a{text-decoration:underline}
@media(max-width:1100px){.lab-layout{grid-template-columns:210px minmax(0,1fr);gap:25px}.bench{padding:25px}.operation-layout{grid-template-columns:1fr;gap:30px}.result{border-top:1px solid var(--line);padding-top:22px}.metric-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}.metric-list>div:last-child{grid-column:1/-1}.metric-list>div{margin:0}.lab-intro{gap:36px}.local-note{max-width:none}}
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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.lab-brand{min-height:44px}.lab-footer{align-items:center}.lab-footer a{display:inline-flex;align-items:center;min-height:44px;text-decoration:underline;text-underline-offset:6px}.question-tabs button[aria-selected=true]{box-shadow:inset 0 1px var(--amber)}.experiment-heading{margin-bottom:28px}.experiment-heading h2{line-height:1.55}.bench{padding:32px}.data-note{line-height:1.8}.result-summary{margin-top:24px}
@media(max-width:1000px){.lab-header{flex-wrap:wrap}.lab-header nav{gap:0 22px}}@media(max-width:800px){.lab-header nav{width:100%}}@media(max-width:760px){.bench{padding:24px 20px}.lab-header nav{gap:0 22px}.lab-footer{align-items:flex-start}}@media(max-width:400px){.bench{padding:22px 16px}}