:root{color-scheme:dark;--bg:#20272c;--panel:#2d353b;--line:#48565e;--text:#f1f5f5;--muted:#b6c3c9;--cyan:#6ae1df;--yellow:#f4d07b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:1rem/1.5 "Microsoft YaHei",system-ui,sans-serif}button,input,select{font:inherit}button,select{cursor:pointer}button{border:1px solid var(--line);border-radius:5px;background:#35424a;color:var(--text);padding:9px 15px;transition:background .15s,border-color .15s}button:hover{border-color:var(--cyan);background:#3b5059}button[aria-pressed=true]{background:var(--cyan);border-color:var(--cyan);color:#132c32}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,#stage:focus-visible{outline:2px solid var(--yellow);outline-offset:3px}header{display:flex;gap:28px;align-items:center;justify-content:space-between;padding:22px max(28px,calc((100vw - 1520px)/2));border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;color:var(--cyan);text-decoration:none;font-weight:650;font-size:1.1875rem;white-space:nowrap}.brand small{display:block;font-size:0.75rem;letter-spacing:1.6px;color:var(--muted);font-weight:400}nav{display:flex;gap:8px}nav button{font-size:0.9375rem;padding:11px 19px;background:transparent}.tag{font-size:0.8125rem;letter-spacing:.5px;color:var(--muted)}main{max-width:1580px;margin:auto;padding:28px}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}.eyebrow{font-size:0.75rem;letter-spacing:2px;color:var(--cyan);margin:0 0 6px}h1{font-size:clamp(25px,2.3vw,36px);letter-spacing:.5px;line-height:1.4;margin:0}h2{font-size:1.125rem;margin:0;font-weight:600}.intro p:not(.eyebrow){color:var(--muted);margin:8px 0 0}.quiet{background:transparent;color:var(--muted);font-size:0.875rem}.compact{padding:6px 9px}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 370px;gap:18px}.model-panel,.monitor-panel,.simulation-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;overflow:hidden}.panel-head{display:flex;gap:14px;align-items:center;justify-content:space-between;padding:15px 20px;border-bottom:1px solid var(--line);min-height:66px}.segmented{display:flex;margin-left:auto;gap:4px}.segmented button{font-size:0.875rem;padding:6px 12px}.model-panel #stage{height:390px;position:relative;touch-action:none;background:radial-gradient(ellipse at 50% 55%,#3e494f,#252e34)}#stage>canvas{width:100%;height:100%;display:block}#loading{position:absolute;left:24px;top:70px;color:var(--cyan)}.stage-label{position:absolute;top:17px;left:20px;right:20px;font-size:0.8125rem;color:var(--muted);pointer-events:none}.stage-bottom{position:absolute;bottom:14px;left:20px;right:20px;display:flex;justify-content:space-between;gap:15px;color:var(--muted);font-size:0.75rem;pointer-events:none}.controls{border-top:1px solid var(--line);padding:15px 20px 18px}.angle-row{display:flex;align-items:baseline;gap:16px;margin-bottom:12px}.angle-row label{font-size:0.875rem;color:var(--muted)}.angle-row output{font-size:1.75rem;line-height:1.2;color:var(--cyan);font-variant-numeric:tabular-nums}.angle-row>span{font-size:0.875rem;color:var(--muted)}.slider-row{display:flex;align-items:center;gap:12px}.slider-row button{font-size:0.875rem;white-space:nowrap;padding:6px 12px}.slider-row input{min-width:40px;flex:1;accent-color:var(--cyan);cursor:pointer}.targets{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:14px}.targets>span{font-size:0.8125rem;color:var(--muted);margin-right:4px}.targets button{font-size:0.875rem;padding:3px 14px;background:transparent;color:var(--spectral);border-color:#596671}.targets button:hover{background:#414d56}.badge{font-size:0.75rem;padding:2px 8px;border:1px solid var(--cyan);color:var(--cyan);border-radius:3px}.monitor-panel{background:#222c32}.monitor-panel>canvas{width:100%;height:auto;display:block}.monitor-caption{padding:0 20px 13px;display:flex;flex-direction:column;gap:4px}.monitor-caption strong{font-size:1.125rem}.monitor-caption span{font-size:0.875rem;color:var(--muted)}.view-options{padding:12px 20px;display:flex;align-items:center;gap:9px;border-top:1px solid var(--line);font-size:0.875rem}.view-options select{min-width:100px;background:#33434d;color:var(--text);padding:5px;border:1px solid var(--line);border-radius:4px}.check{margin-left:auto;white-space:nowrap;display:flex;align-items:center;gap:3px;accent-color:var(--cyan)}.small{font-size:0.8125rem;color:var(--muted);line-height:1.7}.note{margin:0;padding:0 20px 16px}.simulation-panel{margin-top:18px}.simulation-panel .panel-head{border:0;padding-bottom:0}.legend{display:flex;gap:22px;font-size:0.8125rem}.cyan{color:var(--cyan)}.yellow{color:var(--yellow)}#plot{width:100%;height:270px;display:block;cursor:crosshair}.plot-foot{border-top:1px solid var(--line);padding:12px 20px;display:flex;justify-content:space-between;gap:15px;font-size:0.8125rem;color:var(--muted)}#modelFormula{white-space:nowrap;color:var(--cyan)}.method{font-size:0.875rem;color:var(--muted);padding:20px 0 8px}.method summary{cursor:pointer;display:list-item}.method p{max-width:1100px;line-height:1.8}.parameter-row{display:flex;gap:18px;flex-wrap:wrap}.parameter-row label{font-size:0.875rem}.parameter-row input{width:82px;background:#1d2a31;border:1px solid var(--line);border-radius:4px;padding:6px;color:var(--text);margin-left:8px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:18px 0 6px;font-size:0.75rem;color:#9aadb7;letter-spacing:1px}[hidden]{display:none!important}@media(min-width:1500px){.model-panel #stage{height:430px}.lab-grid{grid-template-columns:minmax(0,1fr) 400px}}@media(max-width:1050px){header{padding:17px 22px;gap:16px}.tag{display:none}.lab-grid{grid-template-columns:minmax(0,1fr) 320px}.panel-head{padding:12px}.segmented button{padding:6px 8px}.stage-label{font-size:0.75rem}.angle-row{gap:10px;flex-wrap:wrap}.compact{display:none}.view-options{padding:10px;gap:5px}}@media(max-width:800px){header{flex-wrap:wrap;gap:16px}.brand{font-size:1.125rem}nav{width:100%}nav button{flex:1}main{padding:20px 14px}.intro{align-items:flex-start;flex-direction:column;margin-bottom:18px}.intro .quiet{padding:6px 10px}.lab-grid{grid-template-columns:1fr}.model-panel #stage{height:360px}.monitor-panel{display:grid;grid-template-columns:1fr 1fr}.monitor-panel .panel-head{grid-column:1/-1}.monitor-panel>canvas{grid-row:2/5}.monitor-caption{align-self:end;padding:14px}.view-options{flex-wrap:wrap;align-self:start}.note{padding:0 14px 14px}.panel-head{flex-wrap:wrap;gap:7px}.plot-foot{flex-direction:column}.legend{gap:12px}.stage-label{left:14px;right:14px}.stage-bottom{left:14px;right:14px}.stage-bottom #hint{display:none}.angle-row output{font-size:1.625rem}.controls{padding:14px}.parameter-row{gap:10px}.simulation-panel h2{font-size:1.0rem}footer{gap:10px;flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

header,.slider-row,.angle-row,.view-options,.panel-head{flex-wrap:wrap}.parameter-row input{width:6.5em}h1{font-size:clamp(1.5625rem,2.3vw,2.25rem)}

/* Independent exploration keeps the original light graph / luminous screen language. */
.explore-panel{margin-top:24px;border:1px solid #c1cfd9;border-radius:10px;background:#f8fafc;color:#243746;overflow:hidden}.explore-head{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 28px 12px}.explore-head .eyebrow{color:#288daa}.explore-head h2{font-size:1.4rem}.explore-head p:not(.eyebrow){font-size:.875rem;color:#6b8090;margin:6px 0}.explore-head label{white-space:nowrap;font-size:.875rem}.explore-panel select,.explore-panel button{background:white;color:#354d5d;border:1px solid #c6d6e0;border-radius:6px;padding:9px}.explore-controls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 28px;padding:12px 28px 20px}.explore-controls label{font-size:.875rem;font-weight:600;display:grid;grid-template-columns:1fr auto;align-items:center;gap:5px}.explore-controls output{color:#1589ad;font-variant-numeric:tabular-nums}.explore-controls input{width:100%;grid-column:1/-1;accent-color:#159ebd;min-height:28px;margin:0;cursor:pointer}.explore-legend{display:flex;gap:22px;align-items:center;flex-wrap:wrap;padding:10px 28px;border-top:1px solid #dde6ec;font-size:.8125rem}.explore-legend button{margin-left:auto;font-size:.75rem}.explore-legend #exploreSummary{color:#637c8b}#explorePlot{width:100%;height:420px;display:block}.explore-foot{margin:0;border-top:1px solid #e1e8ed;padding:12px 28px;color:#6e8290;font-size:.75rem}.targets select{border:1px solid #596671;background:#253740;color:#edf6fb;padding:4px;border-radius:4px}#mobileScope{display:none;pointer-events:none}.slider-row input{min-height:36px}.slider-row button,.targets button{min-height:36px}
@media(max-width:800px){.model-panel #stage{height:340px}.stage-label{font-size:.6875rem;max-width:90%}.stage-bottom{font-size:.65rem}#mobileScope:not([hidden]){display:block!important;position:absolute;z-index:2;bottom:35px;right:8px;width:128px;height:auto;border:1px solid #608793;border-radius:6px;box-shadow:0 4px 18px #0007}.intro{gap:10px}.intro p:not(.eyebrow){font-size:.875rem}.monitor-panel{grid-template-columns:46% 54%}.monitor-caption strong{font-size:.875rem}.monitor-caption span{font-size:.75rem}.view-options{font-size:.75rem}.note{font-size:.7rem}.explore-head{padding:20px 16px 10px;flex-wrap:wrap;gap:10px}.explore-head h2{font-size:1.2rem}.explore-controls{padding:10px 16px;gap:8px 20px;grid-template-columns:repeat(2,minmax(0,1fr))}.explore-controls label{font-size:.75rem}.explore-legend{padding:10px 16px;gap:12px}.explore-legend button{margin-left:0}.explore-foot{padding:12px 16px}#explorePlot{height:380px}.slider-row{gap:7px}.slider-row button{padding:8px}.targets{gap:6px}.targets button{padding:4px 12px}header{padding:16px 14px}.brand small{font-size:.65rem}.parameter-row label{display:flex;justify-content:space-between;align-items:center;width:100%}}
@media(max-width:360px){main{padding:16px 10px}.model-panel #stage{height:310px}#mobileScope:not([hidden]){width:110px}.monitor-panel{display:block}.monitor-panel>canvas{max-width:250px;margin:auto}.explore-controls{gap:8px 14px}.panel-head h2{font-size:1rem}nav button{padding:10px 6px}}
#stage>#mobileScope{display:none}
@media(max-width:800px){#stage>#mobileScope:not([hidden]){display:block;position:absolute;width:128px;height:auto}}