:root{font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:#243a35;background:#fff;--green:#236d5e;--purple:#765399;--orange:#bb732b;--red:#bd444a;--muted:#61746b;--line:#dce5de}*{box-sizing:border-box}body{margin:0}main{max-width:1240px;margin:auto;padding:25px 28px 18px}header{margin-bottom:20px}.eyebrow{margin:0 0 5px;font-size:12px;color:var(--green);letter-spacing:.16em}h1{font-size:27px;font-weight:650;margin:0}h2{font-size:16px;line-height:1.5;margin:0 0 10px;font-weight:650}.lead{font-size:14px;line-height:1.8;color:var(--muted);margin:10px 0 0}.scenario-row{display:flex;gap:24px;align-items:center;margin-bottom:18px}.scenario-row p{font-size:13px;margin:0;color:var(--muted);line-height:1.65}.presets{display:flex;flex-shrink:0;background:#f2f6f1;padding:4px;border-radius:8px;gap:3px}button{font:inherit;font-size:14px;border-radius:6px;padding:9px 14px;border:1px solid #cfded3;color:#28493d;background:#fff;cursor:pointer}button:hover:not(:disabled){background:#edf4ed}button[aria-pressed=true]{background:#295f4c;color:white;border-color:#295f4c}.presets button{font-size:13px}.presets button:not([aria-pressed=true]){background:transparent;border-color:transparent}button:focus-visible{outline:3px solid #93bba8;outline-offset:3px}button:disabled{opacity:.42;cursor:default}.primary{background:#295f4c;color:white;border-color:#295f4c}.primary:hover:not(:disabled){background:#1c4c3b}.quiet{border-color:transparent;color:var(--muted);text-decoration:underline;text-underline-offset:4px}.content-grid{display:grid;grid-template-columns:minmax(540px,1fr) 278px;gap:20px;align-items:start}.distribution-panel{border:1px solid var(--line);border-radius:12px;background:#fefefd;padding:10px 10px 15px}#joint-plot{display:block;width:100%;height:auto}.plot-key{display:flex;justify-content:center;gap:18px;font-size:11px;color:var(--muted);line-height:1.6}.plot-key span{display:flex;align-items:center;gap:5px}.plot-key i{display:inline-block;width:12px;height:12px;border-radius:2px}.joint-key{background:#559d83}.failure-key{background:#f0c6c8}.point-key{background:#223e30;border:2px solid white;outline:1px solid #223e30;border-radius:50%!important}aside{display:grid;gap:12px}aside section{border:1px solid var(--line);border-radius:10px;padding:15px 17px}aside p{font-size:12px;color:var(--muted);line-height:1.8;margin:8px 0 0}.physical-card{background:#f5f7f0}.physical-card h2{font-size:14px;margin-bottom:6px}.mini-bridge{position:relative;height:122px;margin:0 -10px;background:#f2f5f0;border-radius:6px;overflow:hidden}#scene{position:absolute;inset:0}#scene canvas{display:block;width:100%;height:100%}#scene-labels{display:none}.scene-label{display:none}#scene-error{font-size:13px;text-align:center;padding:40px 5px}.sample-card h2{font-size:14px}.sample-values{display:flex;gap:18px}.sample-values>div{flex:1}.sample-values span{display:block;font-size:12px;margin-bottom:4px}.sample-values strong{font-size:29px;line-height:1.2;font-weight:650;font-variant-numeric:tabular-nums}.r-value{color:var(--purple)}.s-value{color:var(--orange)}#sample-comparison{font-size:13px;color:#3b5146}#outcome{display:inline-block;font-size:12px;background:#e8f2e9;color:#347048;padding:4px 8px;border-radius:4px;margin-top:8px}#outcome.exceeded{background:#f9e4e5;color:var(--red)}.probability-card h2{font-size:14px;margin-bottom:5px}#theoretical-probability{font-size:29px;font-weight:650;color:var(--red);font-variant-numeric:tabular-nums}.observed{margin-top:15px;padding-top:12px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:5px;align-items:center;font-size:12px;color:var(--muted)}#sample-frequency{font-size:21px;color:#295f4c;font-weight:600}#sample-count{grid-column:1/-1}.sampling{display:flex;justify-content:space-between;gap:18px;margin:18px 0 24px}.sampling>div{display:flex;gap:9px}.explanation-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px;margin:3px 4px 20px}.explanation-grid p{margin:0;font-size:13px;line-height:1.9;color:var(--muted)}.math-note{border-left:3px solid #8d72aa;padding:12px 16px;background:#f6f2f9;color:#62487c}.math-note strong{font-size:13px}.math-note p{font-size:12px;line-height:1.85;margin:4px 0 0}footer{font-size:11px;line-height:1.8;color:#758178;border-top:1px solid var(--line);margin-top:18px;padding-top:10px}footer p{margin:3px 0}[hidden]{display:none!important}body.embed main{padding:18px 20px 14px}svg text{font-family:"Microsoft YaHei","PingFang SC",sans-serif}
.content-grid{margin-bottom:24px}.sampling{margin:12px 0 18px}
#joint-plot{overflow:hidden}
.density-toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:3px 3px 10px}.density-views{display:flex;gap:5px}.density-views button{font-size:12px;padding:7px 12px}.surface-toggle{font-size:12px;display:flex;align-items:center;gap:6px;color:#50685b}.surface-toggle input{accent-color:#2a7651}.density-stage{height:430px;position:relative;overflow:hidden;border-radius:9px;background:#f7f9f5}.density-stage canvas{display:block;width:100%;height:100%}.density-labels{position:absolute;inset:0;pointer-events:none}.density-label{position:absolute;transform:translate(-50%,-50%);white-space:nowrap;font-size:11px;color:#586c5d;background:#ffffffa6;padding:2px 4px;border-radius:3px}.density-label.axis-tick{font-size:10px;background:#ffffff6e;padding:0 2px}.density-label.r-axis{color:#765399;font-weight:600}.density-label.s-axis{color:#bb732b;font-weight:600}.density-label.density-axis{font-size:11px;font-weight:600}.density-label.safe-region{color:#236b44}.density-label.failed-region{color:#b04045}.density-label.boundary-label{color:#293c32}.density-reading{font-size:12px;line-height:1.8;margin:12px 6px;color:#526a5c}.plot-key .joint-key{background:#27835b}.plot-key .failure-key{background:#c94b50}.marginal-controls{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:17px;border-top:1px solid #e2e8df;padding-top:10px}.marginal-controls svg{width:100%;height:auto;display:block;user-select:none;border-radius:7px;background:#fafbf8}.marginal-controls [data-handle]{cursor:ew-resize}.marginal-controls [data-handle]:focus{outline:none}.marginal-controls [data-handle]:focus .handle{stroke-width:4}.marginal-controls .dragging{background:#f3f8ee}.drag-note{font-size:11px;color:#6a7c6e;line-height:1.8;margin:4px 6px 0}.content-grid{grid-template-columns:minmax(0,1fr) 260px}.probability-card #sample-frequency,.probability-card #sample-count{color:#b94147}#safe-count{color:#257248;grid-column:1/-1}#joint-plot{height:430px;width:100%}.observed{row-gap:7px}

/* Main graph carries both marginals and all drag handles. */
.content-grid{display:block}.density-stage{height:590px}.density-label{font-size:13px}.density-label.axis-tick{font-size:12px}.density-label.density-axis{font-size:12px}.density-label.sample-axis-value{font-size:14px;font-weight:700;border:1px solid currentColor;background:#fff;padding:3px 5px;z-index:3;transform:translate(-50%,4px)}.axis-R{color:#765399}.axis-S{color:#b36b24}
.marginal-axis-title{position:absolute;transform:translate(-50%,-50%);font-size:13px;font-weight:600;white-space:nowrap;background:#ffffffdc;border-radius:4px;padding:4px 7px}.axis-handle{position:absolute;pointer-events:auto;touch-action:none;transform:translate(-50%,-50%);padding:0;width:30px;height:28px;border:2px solid currentColor;background:white;font-size:12px;font-weight:700;cursor:grab;z-index:4;box-shadow:0 2px 6px #0001}.axis-handle.handle-mean{border-radius:50%;width:30px;height:30px;font-size:16px}.axis-handle.dragging{cursor:grabbing;background:#eef3e9}.axis-handle:focus-visible{outline:3px solid #89b8ac}.drag-note{font-size:13px;line-height:1.8;margin:10px 10px 2px}.density-reading{font-size:14px}.plot-key{font-size:12px}#joint-plot{height:610px}aside{grid-template-columns:1fr 1.4fr;margin-top:14px}aside p{font-size:13px}.probability-card{display:grid;grid-template-columns:1fr 1fr;column-gap:24px}.probability-card h2,.probability-card>strong,.probability-card>p{grid-column:1}.probability-card .observed{grid-column:2;grid-row:1/5;margin:0;padding:0 0 0 20px;border-top:0;border-left:1px solid var(--line)}#frequency-explanation{grid-column:1/-1}.density-toolbar .quiet{margin-left:auto;font-size:12px}.sample-values strong{font-size:27px}

.axis-handle.handle-left,.axis-handle.handle-right{width:22px;height:22px;font-size:10px;border-width:1.5px}.axis-handle.handle-left::before,.axis-handle.handle-right::before{content:"";position:absolute;left:9px;width:1px;height:8px;background:currentColor}.axis-handle.handle-left::before{bottom:100%}.axis-handle.handle-right::before{top:100%}
aside{display:block}.probability-card{margin-bottom:10px}.sample-details>summary,.math-note>summary{cursor:pointer;font-size:13px;color:#526a5c}.sample-details{margin:10px 0 0}.sample-details .sample-card{margin-top:8px}.math-note{background:transparent;border:0;padding:0;margin-top:12px}.math-note p{color:#526a5c}.density-stage{height:520px}.density-reading{font-size:13px;margin:9px 6px}.density-label.sample-axis-value{font-size:12px}.probability-card #frequency-explanation{margin-top:5px}.content-grid{margin-bottom:12px}footer{margin-top:12px;padding-top:8px}