:root{--ink:#172e2b;--muted:#657773;--line:#dce4df;--accent:#247458;--paper:#f5f7f3}*{box-sizing:border-box}body{margin:0;background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.65}a{color:inherit}header,main,footer{max-width:1360px;margin:auto}header{display:flex;justify-content:space-between;align-items:center;padding:28px 36px;border-bottom:1px solid var(--line)}.brand{font-size:21px;font-weight:700;text-decoration:none}.brand span{font-size:15px;font-weight:400;color:var(--muted);margin-left:12px}.download{background:var(--ink);color:white;padding:11px 18px;border-radius:7px;text-decoration:none;font-size:14px}main{padding:0 36px}.intro{padding:56px 0 38px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:2px;color:var(--accent)}h1{font-size:42px;letter-spacing:-1.5px;line-height:1.25;margin:16px 0}p{color:var(--muted)}.intro>p:not(.eyebrow){font-size:17px}.stats{display:flex;gap:28px;font-size:13px;color:var(--muted);margin-top:24px}.stats b{color:var(--ink);font-size:18px}.layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:30px;align-items:start}nav{display:grid;gap:7px;position:sticky;top:16px}button{font:inherit;cursor:pointer}nav a{padding:15px;text-align:left;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--ink);display:grid;grid-template-columns:31px 1fr;gap:8px}nav a:hover{background:#e9efe8}nav a.active{background:white;border-color:var(--line);box-shadow:0 3px 12px #193a2910}nav small{display:block;color:var(--muted);font-size:11px;margin-top:3px}nav .num{font-size:12px;font-weight:700;color:var(--accent);padding-top:4px}article{background:white;border:1px solid var(--line);border-radius:12px;padding:28px;min-width:0}h2{font-size:25px;margin:6px 0 8px;line-height:1.3}.tag{font-size:12px;padding:4px 9px;border-radius:5px;background:#edf4ee;color:var(--accent);display:inline-block}.task-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.task-top span{font-size:12px;color:var(--muted)}.videos{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}figure{margin:0;min-width:0}figcaption{display:flex;justify-content:space-between;align-items:center;font-size:13px;margin-bottom:9px}figcaption span{color:var(--muted);font-size:11px}video{width:100%;display:block;background:#14241f;aspect-ratio:16/9;border-radius:6px}.playbar{display:flex;align-items:center;gap:14px;margin-top:15px}.playbar button{background:var(--accent);color:white;border:0;border-radius:6px;padding:9px 16px;font-size:13px}.playbar span{font-size:11px;color:var(--muted)}.steps{font-size:13px;background:#f6f8f4;border-radius:6px;padding:14px 16px;color:var(--muted)}.results{border-top:1px solid var(--line);margin-top:25px;padding-top:20px;display:grid;grid-template-columns:1.4fr 1fr;gap:24px}.results h3{font-size:14px;margin:0 0 10px}.results small{color:var(--muted);font-weight:400}.rounds{display:flex;gap:7px;flex-wrap:wrap}.round{border:1px solid var(--line);border-radius:5px;padding:6px 9px;font-size:12px;text-align:center}.round.ok{background:#edf5ed;color:#247458}.round.no{background:#faf1ed;color:#9b4c32}.results p{font-size:12px}.result-total{font-size:13px;margin-top:10px}details{margin-top:25px;border-top:1px solid var(--line);padding-top:20px}summary{font-size:14px;cursor:pointer;font-weight:600}pre{white-space:pre-wrap;word-break:break-word;background:#f6f8f4;padding:18px;font-size:12px;line-height:1.8;border-radius:6px;max-height:500px;overflow:auto}.notes{margin:45px 0;padding-top:25px;border-top:1px solid var(--line);max-width:1000px}.notes h2{font-size:17px}.notes p{font-size:13px}footer{border-top:1px solid var(--line);padding:22px 36px 35px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #8cc9ae;outline-offset:3px}@media(max-width:850px){.layout{grid-template-columns:1fr}nav{position:static;display:flex;overflow-x:auto;padding-bottom:8px}nav a{flex:0 0 190px}.intro{padding-top:34px}h1{font-size:32px}header,main,footer{padding-left:20px;padding-right:20px}article{padding:20px}.brand span{display:none}}@media(max-width:550px){.videos,.results{grid-template-columns:1fr}.stats{gap:18px}.download{font-size:12px;padding:9px 12px}.playbar{flex-wrap:wrap}h1{font-size:29px}.intro>p:not(.eyebrow){font-size:15px}}

nav a{text-decoration:none}

.model-demo{border-top:1px solid var(--line);margin-top:24px;padding-top:20px}.model-demo h3{font-size:17px;margin:0}.model-demo p,.model-demo label{font-size:13px}.model-demo select{font:inherit;font-size:13px;padding:8px;border:1px solid var(--line);border-radius:5px;background:white;color:var(--ink);max-width:100%}#model-player{max-width:640px;margin-top:16px}

.failure-reason{background:#faf1ed;border-left:3px solid #ae7653;padding:13px 16px;border-radius:5px;font-size:13px}.failure-reason p{margin:6px 0}.failure-reason small{overflow-wrap:anywhere;color:var(--muted)}

/* Full-width comparison layout */
header,main,footer{max-width:1920px}.intro{padding:18px 0 16px}.intro h1{font-size:26px;margin:5px 0}.intro>p:not(.eyebrow){font-size:13px;margin:4px 0}.eyebrow{display:none}.stats{margin-top:5px;gap:18px}.stats b{font-size:14px}header{padding-top:14px;padding-bottom:14px}.layout{display:block}nav{position:static;display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}nav a{padding:8px 12px;grid-template-columns:25px 1fr;gap:5px;border-color:var(--line);font-size:13px}nav small{font-size:10px;margin:0}article{padding:18px}.description{font-size:13px;margin:5px 0}.videos{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:14px;align-items:start}figure{border:1px solid var(--line);border-radius:7px;padding:8px}figcaption{gap:4px;font-size:12px;min-height:21px}figcaption .no{color:#9b4c32}figcaption .ok{color:#247458}.failure-reason{padding:7px 9px;font-size:11px;margin-top:7px}.failure-reason p{margin:3px 0}.failure-reason details{padding-top:3px;margin-top:3px;border:0}.failure-reason summary{font-size:10px;font-weight:400}.playbar{margin-top:10px}.playbar button{padding:6px 12px}#pause-all{background:#e8eee9;color:var(--ink)}.steps{margin:14px 0 8px}.result-total{color:var(--muted);font-size:12px}@media(max-width:1100px){.videos{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:550px){.videos{grid-template-columns:1fr}nav a{flex:1 0 145px}header,main,footer{padding-left:12px;padding-right:12px}article{padding:10px}.intro h1{font-size:23px}}

.visual-review{margin-top:8px;padding:7px 9px;background:#f1f5f2;border-left:3px solid #92ab9c;border-radius:5px;font-size:11px}.visual-review p{margin:3px 0}.visual-review small{color:var(--muted)}