@charset "UTF-8";
:root{color-scheme:dark;--bg:#090c12;--surface:#10151e;--ink:#f0f3f8;--muted:#a2adbd;--quiet:#768497;--line:#242d3b;--accent:#8ec5ff;--blue:#6eabef;--green:#90cdb5;--red:#e8a59d}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.85 "Inter","Segoe UI","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}button{font:inherit;cursor:pointer}a,button,summary,video{outline-offset:5px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--accent)}.wrap{width:min(1320px,calc(100% - 96px));margin-inline:auto}header{position:sticky;top:0;z-index:10;background:#090c12ed;backdrop-filter:blur(18px);border-bottom:1px solid #ffffff0b}nav{height:77px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-size:16px;font-weight:650;color:var(--ink)}.brand-icon{font-size:26px;line-height:1;color:var(--accent)}nav>div{display:flex;gap:35px;font-size:13px}nav>div a{color:var(--muted)}nav>div a:hover{color:white}.hero{padding-top:75px;position:relative}.hero:before{content:"";position:absolute;inset:-76px -48px auto;height:600px;background:radial-gradient(ellipse at 70% 15%,#13366440,transparent 64%);z-index:-1;pointer-events:none}.eyebrow,.section-number{font-size:11px;letter-spacing:2.4px;font-weight:550;color:var(--accent)}h1{font-size:100px;font-weight:600;line-height:1.15;letter-spacing:-4px;margin:23px 0 20px}h2,h3,p{margin:0}.hero>h2{font-size:32px;line-height:1.5;font-weight:400;letter-spacing:.3px;color:#c7d4e5}.intro{max-width:770px;font-size:17px;line-height:2;color:var(--muted);margin-top:27px}.hero-bottom{display:flex;align-items:center;gap:30px;margin-top:30px}.main-link{display:inline-flex;align-items:center;justify-content:center;min-height:47px;border-radius:5px;padding:8px 23px;background:#dceaff;color:#122238;font-size:14px;font-weight:600;transition:background .15s}.main-link:hover{background:white}.hero-bottom p{font-size:12px;color:var(--quiet)}.hero-bottom p span{margin:0 13px;color:#49637e}.task-sequence{display:grid;grid-template-columns:1fr 30px 1fr 30px 1fr 30px 1fr;gap:12px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:25px 0;margin-top:58px}.task-sequence>div{display:flex;gap:15px;align-items:center}.task-sequence span{font-size:12px;color:#547395;font-variant-numeric:tabular-nums}.task-sequence p{font-size:14px;color:#bec8d5}.task-sequence i{font-style:normal;color:#3b4e65;text-align:center}.section{padding-top:92px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:25px}.section-heading h2{font-size:38px;line-height:1.5;letter-spacing:-.8px;font-weight:550;margin-top:13px}.section-intro{font-size:16px;color:var(--muted);max-width:940px;line-height:1.95}.caption{font-size:12px;color:var(--quiet);margin-top:11px}.caption a{color:var(--quiet);text-decoration:underline;text-underline-offset:4px}.outline-button,.outline-link{flex-shrink:0;border:1px solid #3c4b60;border-radius:5px;color:#c5d5e9;background:transparent;font-size:13px;padding:9px 17px;line-height:1.7}.outline-button:hover,.outline-link:hover{border-color:#8baed5;background:#122034}.run-group{margin-top:38px}.group-heading{display:flex;gap:28px;align-items:center;margin-bottom:16px}.group-heading h3{font-size:16px;font-weight:500;display:flex;align-items:center;gap:14px;white-space:nowrap}.group-heading h3 span{font-size:16px;color:var(--accent);background:#12233a;border:1px solid #24415f;width:31px;height:31px;text-align:center;line-height:29px;border-radius:5px}.group-heading p{font-size:13px;color:var(--quiet)}.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.run-card{border:1px solid var(--line);border-radius:9px;overflow:hidden;background:var(--surface);min-width:0}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 16px}.card-heading h3{font-size:15px;font-weight:500;letter-spacing:.8px}.result-badge{font-size:11px;color:var(--muted)}.result-badge.clear{color:var(--green)}.result-badge.fail{color:var(--red)}video{width:100%;display:block;aspect-ratio:3/2;background:#090c12;object-fit:contain}video:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.card-info{padding:13px 16px 15px}.card-info p{font-size:13px;color:#b2bdcb;line-height:1.7;min-height:22px}.card-info>div{display:flex;gap:13px;align-items:center;font-size:11px;margin-top:10px;flex-wrap:wrap}.card-info>div>span{color:var(--quiet);margin-right:auto}.card-info a{color:#9bb9dc}.failed{border-color:#493336}.failed .card-info p{color:#c7aaab}.media-error{padding:10px 15px;color:var(--red);font-size:12px}.result-note{display:grid;grid-template-columns:140px 1fr;gap:20px;padding:22px 25px;border-left:2px solid #6696d0;background:#111926;margin-top:27px}.result-note>b{font-size:14px;font-weight:500;color:#d3e3f6}.result-note p{font-size:14px;color:var(--muted)}.result-note strong{color:#d7e5f5;font-weight:600}.method-layout{display:grid;grid-template-columns:1fr 130px 1fr;border:1px solid var(--line);border-radius:9px;background:linear-gradient(100deg,#121b29,#0d121b);padding:36px 38px;margin-top:30px}.method-label{font-size:12px;color:var(--accent);letter-spacing:1px}.method-layout h3{font-size:24px;font-weight:500;line-height:1.6;margin:15px 0}.method-layout p{font-size:15px;line-height:1.95;color:var(--muted);max-width:440px}.method-example{font-size:13px;color:#7d93af;border-top:1px solid var(--line);padding-top:18px;margin-top:24px}.method-link{display:flex;flex-direction:column;align-items:center;justify-content:center}.method-link span{font-size:11px;color:var(--quiet)}.method-link b{font-size:30px;line-height:1.4;color:#4f759e;font-weight:400}.method-summary{font-size:16px;margin-top:25px;color:#c4d0df}details{margin-top:22px;border-bottom:1px solid var(--line);padding-bottom:17px}summary{font-size:13px;color:var(--quiet);cursor:pointer}details>p{font-size:14px;color:var(--muted);max-width:970px;margin-top:15px}.analysis-row{display:grid;grid-template-columns:1.12fr 1fr;gap:55px;align-items:center;margin-top:45px;padding-bottom:45px;border-bottom:1px solid var(--line)}.analysis-media{min-width:0}.analysis-media video{border:1px solid var(--line);border-radius:8px}.clip-meta{display:flex;justify-content:space-between;gap:15px;font-size:11px;color:var(--quiet);padding-top:12px}.clip-meta a{color:#9bb9dc}.analysis-index{font-size:12px;color:var(--accent)}.analysis-copy h3{font-size:25px;line-height:1.6;font-weight:500;margin:10px 0 18px;max-width:440px}.analysis-copy p{font-size:14px;color:var(--muted);line-height:1.95}.analysis-copy .finding{font-size:13px;color:#8596ad;margin-top:20px}.data-link{font-size:12px;display:inline-block;margin-top:14px}.load-chart{display:grid;gap:14px;margin:25px 0}.load-chart>div{display:grid;grid-template-columns:100px 1fr 70px;gap:13px;align-items:center;font-size:12px}.load-chart span{color:var(--quiet)}.load-chart i{display:block;width:var(--w);min-width:2px;height:9px;border-radius:2px;background:#7ca9dd}.load-chart b{font-weight:500;text-align:right;color:#c3d7ed;font-variant-numeric:tabular-nums}.push-measures{display:grid;grid-template-columns:repeat(3,1fr);margin-top:25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0;gap:14px}.push-measures span{font-size:12px;color:var(--quiet)}.push-measures b{display:block;font-size:28px;color:#d6e6f8;font-weight:400;font-variant-numeric:tabular-nums}.push-measures small{font-size:12px;color:var(--muted)}.analysis-conclusion{display:grid;grid-template-columns:1fr 2.6fr;gap:35px;padding:25px 0}.analysis-conclusion h3{font-size:18px;font-weight:500}.analysis-conclusion p{font-size:14px;color:var(--muted)}.table-wrap{overflow-x:auto;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-top:20px}table{border-collapse:collapse;width:100%;font-size:14px;font-variant-numeric:tabular-nums;white-space:nowrap;text-align:left}caption{text-align:left;font-size:12px;color:var(--quiet);padding-bottom:18px;white-space:normal}td,th{padding:13px 20px;border-bottom:1px solid #1a2432;font-weight:400}thead th{color:var(--quiet);font-size:12px;background:#101723}tbody th{color:#d9e8fa}td{color:var(--muted)}tbody tr:last-child>*{border-bottom:0}.limits{display:grid;grid-template-columns:1fr 1.6fr;gap:40px;margin-top:25px}.limits p{font-size:13px;color:var(--quiet)}.limits b{font-weight:500;color:var(--muted)}.resources{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:32px}.resources a{display:flex;flex-direction:column;font-size:13px;padding:17px 0;border-top:1px solid #394a60;color:#c0d6ee}.resources a:hover{color:white;border-top-color:var(--accent)}.resources span{color:var(--quiet);font-size:11px;margin-top:4px;letter-spacing:1px}footer{display:flex;justify-content:space-between;gap:25px;border-top:1px solid var(--line);margin-top:80px!important;padding:25px 0 38px;font-size:12px;color:var(--quiet)}footer a{color:var(--quiet)}.skip{position:fixed;left:20px;top:-80px;padding:8px 15px;background:white;color:black;z-index:50}.skip:focus{top:10px}[hidden]{display:none!important}
@media(min-width:1600px){.wrap{width:min(1420px,calc(100% - 160px))}.hero{padding-top:90px}h1{font-size:112px}.video-grid{gap:24px}}
@media(max-width:1050px){.wrap{width:calc(100% - 56px)}.video-grid{gap:12px}.card-heading{padding:10px 12px}.card-info{padding:12px}.card-info>div{gap:10px}.card-info>div>span{flex-basis:100%}.analysis-row{gap:30px}.analysis-copy h3{font-size:22px}.method-layout{padding:30px;grid-template-columns:1fr 85px 1fr}.group-heading p{font-size:12px}.task-sequence{gap:6px}.task-sequence>div{gap:10px}.task-sequence p{font-size:13px}}
@media(max-width:760px){.wrap{width:calc(100% - 36px)}nav{height:68px;gap:12px}nav>div{gap:18px;font-size:12px}.brand{font-size:14px;white-space:nowrap}.hero{padding-top:47px}.hero:before{inset:-68px -18px auto;height:450px}h1{font-size:74px;letter-spacing:-3px;margin-top:19px}.hero>h2{font-size:25px}.intro{font-size:15px;margin-top:23px;line-height:1.95}.hero-bottom{align-items:flex-start;flex-direction:column;gap:17px}.hero-bottom p{font-size:11px}.hero-bottom p span{margin:0 7px}.task-sequence{grid-template-columns:1fr 20px 1fr;row-gap:18px;margin-top:35px;padding:22px 0}.task-sequence>i:nth-of-type(2){display:none}.task-sequence p{font-size:14px}.section{padding-top:66px}.section-heading{gap:15px;align-items:flex-start;flex-direction:column}.section-heading h2{font-size:29px;letter-spacing:-.5px}.section-intro{font-size:14px}.group-heading{align-items:flex-start;flex-direction:column;gap:9px}.video-grid{grid-template-columns:1fr;gap:19px}.card-heading{padding:13px 17px}.card-heading h3{font-size:17px}.result-badge{font-size:12px}.card-info{padding:14px 17px}.card-info p{font-size:14px}.card-info>div>span{flex-basis:auto}.card-info>div{gap:18px;font-size:12px}.result-note{grid-template-columns:1fr;gap:10px;padding:20px}.result-note p{font-size:13px}.method-layout{grid-template-columns:1fr;padding:25px}.method-link{flex-direction:row;gap:24px;padding:25px 0}.method-link b{transform:rotate(90deg);font-size:25px}.method-layout h3{font-size:23px}.method-summary{font-size:14px}.analysis-row{grid-template-columns:1fr;gap:23px;margin-top:30px;padding-bottom:32px}.analysis-copy h3{font-size:24px;max-width:none}.analysis-conclusion{grid-template-columns:1fr;gap:14px}.limits{grid-template-columns:1fr;gap:16px}.resources{grid-template-columns:1fr 1fr}.table-wrap{margin-top:10px}td,th{padding:12px 16px}.caption{font-size:11px}.clip-meta{font-size:11px}footer{margin-top:55px!important;font-size:11px}}
@media(max-width:420px){nav>div{gap:12px;font-size:11px}.brand-icon{font-size:23px}.brand{gap:7px}h1{font-size:66px}.hero>h2{font-size:22px}.eyebrow,.section-number{font-size:10px;letter-spacing:1.7px}.hero-bottom p{font-size:10px}.task-sequence p{font-size:13px}.section-heading h2{font-size:27px}.analysis-copy h3{font-size:22px}.load-chart>div{grid-template-columns:90px 1fr 66px;gap:8px}.card-info>div{font-size:11px;gap:13px}}
/* English project layout and the two control loops. */
:root{--quiet:#8b99ac}
body{font-family:"Inter","Segoe UI",sans-serif;line-height:1.75}
.hero{text-align:center;padding-top:84px}
.hero:before{inset:-78px -48px auto;height:740px;background:radial-gradient(ellipse at 50% 8%,#234a794d,transparent 63%)}
.hero h1{font-size:clamp(72px,8.3vw,124px);font-weight:580;letter-spacing:-6px;line-height:1.03;margin:25px 0 26px;background:linear-gradient(165deg,#fff 28%,#cbdaf2 75%,#92bce9);background-clip:text;-webkit-background-clip:text;color:transparent}
.hero>h2{font-size:clamp(28px,3vw,43px);font-weight:450;letter-spacing:-1.4px;line-height:1.22;color:#d8e4f4;text-wrap:balance}
.hero .intro{max-width:800px;margin:26px auto 0;font-size:17px;line-height:1.85;text-wrap:pretty}
.hero-bottom{justify-content:center;align-items:center;gap:25px;margin-top:29px}
.main-link{gap:24px;padding:12px 23px;border-radius:6px;box-shadow:0 4px 30px #5698ee15}
.secondary-link{font-size:13px;color:#bccde2;display:flex;gap:16px;align-items:center;min-height:47px}
.secondary-link:hover{color:#fff}
.hero-facts{display:flex;justify-content:center;flex-wrap:wrap;gap:13px 26px;margin-top:28px;font-size:12px;color:var(--quiet)}
.hero-facts b{font-weight:550;color:#c6d8ed;margin-right:5px}
.hero-facts>span+span{border-left:1px solid #304054;padding-left:26px}
.task-sequence{text-align:left;margin-top:51px;grid-template-columns:1fr 22px 1.2fr 22px 1.25fr 22px 1.1fr;gap:12px}
.task-sequence>div{justify-content:center;gap:13px}
.task-sequence p{font-size:13px;line-height:1.6}
.section{padding-top:100px}
.section-heading h2{font-size:clamp(28px,3vw,41px);line-height:1.25;letter-spacing:-1.2px;text-wrap:balance}
.section-intro{max-width:930px;line-height:1.85}
.control-diagram{margin-top:32px;padding:25px;border:1px solid #2b3b52;border-radius:14px;background:radial-gradient(ellipse at 48% 48%,#1f3e6530,transparent 75%),linear-gradient(120deg,#111a28,#0c111a);box-shadow:0 20px 70px #0003}
.planning-feedback,.tactile-feedback{display:flex;align-items:center;gap:15px;padding:13px 17px;border:1px solid #33485f;border-radius:6px;background:#18243770;color:#a7bdd7}
.planning-feedback>span:first-child,.tactile-feedback>span:first-child{font-size:26px;line-height:1;color:#9ac6f5}
.planning-feedback p,.tactile-feedback p{font-size:12px;line-height:1.6;flex:1}
.planning-feedback b,.tactile-feedback b{font-weight:550;color:#d6e5f9;margin-right:12px}
.loop-rate{font-size:10px;white-space:nowrap;letter-spacing:.4px;color:#91abd0}
.control-forward{display:grid;grid-template-columns:minmax(0,1fr) 66px minmax(0,1.1fr) 66px minmax(0,1fr);margin:23px 0;align-items:stretch}
.control-node{padding:22px 20px;border:1px solid #2c3b50;border-radius:8px;background:#111b28;min-width:0}
.control-node.tactile{border-color:#5587bd;background:linear-gradient(150deg,#1a3150,#112136);box-shadow:0 0 36px #609edd0d}
.node-label{display:flex;align-items:center;justify-content:space-between;gap:9px;font-size:9px;letter-spacing:1.1px;color:#91a8c4}
.node-chip{padding:3px 7px;font-size:11px;letter-spacing:0;border:1px solid #3a506a;border-radius:4px;color:#c8dcf5;white-space:nowrap}
.tactile .node-chip{border-color:#6191c4;color:#cfe8ff}
.control-node h3{font-size:21px;line-height:1.3;font-weight:550;letter-spacing:-.55px;margin:21px 0 12px;text-wrap:balance}
.control-node>p{font-size:13px;color:#aebdd0;line-height:1.8;min-height:72px}
.control-node strong{font-weight:500;color:#d9e7f8}
.node-io{border-top:1px solid #304157;margin-top:18px;padding-top:12px}
.node-io>span{font-size:9px;letter-spacing:1.5px;color:#84a0c1}
.node-io p{font-size:12px;line-height:1.7;color:#d1dfef;margin-top:4px}
.command-connector{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:7px;color:#8dacce}
.command-connector>span{font-size:11px}
.command-connector>b{font-size:28px;line-height:1;font-weight:400;color:#aacbf0}
.command-connector>small{font-size:9px;line-height:1.6;color:#7f96b2}
.tactile-feedback{margin-left:calc(32.25% + 24px);border-color:#467097;background:#16334a65}
.method-takeaways{display:grid;grid-template-columns:1fr 1fr;gap:65px;margin-top:31px}
.method-takeaways article>span{font-size:10px;letter-spacing:1.4px;color:var(--accent)}
.method-takeaways h3{font-size:23px;font-weight:500;letter-spacing:-.5px;margin:11px 0}
.method-takeaways p{font-size:14px;color:var(--muted);line-height:1.9}
.timing-note{display:flex;align-items:center;gap:28px;margin-top:30px;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.timing-note>b{font-size:36px;letter-spacing:-1.5px;font-weight:400;color:#d3e7ff;white-space:nowrap}
.timing-note p{font-size:13px;color:#c1d2e8;line-height:1.8}
.timing-note p span{font-size:12px;color:var(--quiet)}
.timing-caption{margin-left:auto;font-size:12px;color:var(--quiet)}
.result-note{grid-template-columns:165px 1fr}.result-note>b{line-height:1.8}
.card-info p{min-height:44px;font-size:12px}.card-info>div{gap:9px}.result-badge{font-size:10px;text-align:right}
.group-heading{align-items:baseline;gap:22px}.group-heading h3{white-space:normal}.group-heading p{font-size:12px}
.analysis-index{font-size:10px;letter-spacing:1px}.analysis-copy h3{font-size:28px;line-height:1.25;letter-spacing:-.75px;max-width:none}.analysis-copy p{line-height:1.85}
.analysis-copy .finding b{font-weight:550;color:#bdcfe6}.push-measures span{font-size:11px;line-height:1.6;display:block;min-height:36px}
.load-chart>div{grid-template-columns:104px 1fr 72px}.load-chart span{font-size:11px}
.analysis-conclusion{grid-template-columns:1fr 2.5fr}.analysis-conclusion h3{font-size:19px}.resources a{font-size:13px}
@media(min-width:1600px){.hero{padding-top:95px}}
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@media(max-width:900px){.control-forward{grid-template-columns:1fr;gap:0}.control-node{padding:23px}.control-node>p{min-height:0}.node-label{font-size:10px}.control-node h3{font-size:24px}.node-io{display:grid;grid-template-columns:75px 1fr;gap:12px;align-items:baseline}.node-io p{margin:0}.command-connector{flex-direction:row;gap:18px;padding:17px}.command-connector>b{transform:rotate(90deg);font-size:26px}.command-connector small{font-size:10px}.command-connector small br{display:none}.tactile-feedback{margin-left:0}.planning-feedback .loop-rate,.tactile-feedback .loop-rate{white-space:normal;text-align:right;max-width:90px}.planning-feedback b,.tactile-feedback b{display:block;margin:0 0 2px}.method-takeaways{gap:30px}.task-sequence{grid-template-columns:1fr 20px 1fr;row-gap:18px}.task-sequence>i:nth-of-type(2){display:none}.task-sequence>div{justify-content:flex-start}.task-sequence p{font-size:14px}.timing-caption{display:none}}
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/* Method detail: make the small controller concrete before showing results. */
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