:root{--ink:#172a38;--muted:#526773;--line:#ccd8dc;--paper:#f6f5f0;--card:#fff;--accent:#176866;--wash:#e7f1ee;--warn:#8a4b0c;--bad:#a53a33;--focus:#085d9b;--body:system-ui,-apple-system,'Segoe UI','Noto Sans CJK SC','Microsoft Yahei',sans-serif}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--body);line-height:1.8}a{color:#146a83;text-underline-offset:.2em}button,input,select{font:inherit}button,select,input{min-height:42px}button{cursor:pointer;border:1px solid var(--line);border-radius:7px;background:white;color:var(--ink);padding:7px 13px}button:hover{background:var(--wash)}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--accent);color:white;border-color:var(--accent)}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}input[type=checkbox]{min-height:22px;width:22px;accent-color:var(--accent)}input[type=number],select{width:100%;background:#fff;border:1px solid #a3b7bf;border-radius:6px;padding:7px 9px;color:var(--ink)}input:disabled,select:disabled{background:#e7ebeb}header{background:#173846;color:#fff;padding:34px max(20px,calc((100vw - 1180px)/2)) 30px}header p{max-width:900px;color:#dce6e6;margin:7px 0}header h1{font-size:clamp(25px,3.2vw,38px);line-height:1.35;margin:5px 0 12px}header .eyebrow{letter-spacing:.15em;font-size:12px;color:#b8d7d2}header a{color:#d5eeee}.layout{max-width:1220px;margin:0 auto;padding:20px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}nav{display:flex;gap:7px;flex-wrap:wrap;margin:14px 0}nav button[aria-pressed=true]{background:var(--accent);color:white;border-color:var(--accent)}.lab{background:var(--card);padding:28px;border:1px solid var(--line);border-radius:10px;margin:0 0 26px;box-shadow:0 2px 4px #21313f0a}.lab[hidden], [hidden]{display:none!important}.lab h2{font-size:clamp(23px,2.3vw,30px);margin:0 0 12px;line-height:1.45}.lab h3{font-size:20px;line-height:1.5;margin:22px 0 12px}.kicker{text-transform:uppercase;letter-spacing:.07em;font-size:12px;color:var(--accent);font-weight:650}.identity{padding:10px 13px;border-left:4px solid var(--accent);background:var(--wash);font-size:14px;margin:15px 0}.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:13px 18px;background:#f8f9f7;padding:19px;border:1px solid var(--line);border-radius:8px}.control{display:flex;flex-direction:column;gap:3px;font-size:14px}.control small{color:var(--muted);font-size:12px}.control.check{display:flex;flex-direction:row;align-items:center;gap:9px}.button-row{display:flex;gap:9px;flex-wrap:wrap;margin:12px 0}.status{padding:12px 15px;margin:18px 0 12px;border-radius:6px;background:var(--wash);border-left:4px solid var(--accent)}.status.warn{background:#fff4e5;border-color:var(--warn)}.status.error{background:#fcece7;border-color:var(--bad)}.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:18px 0}.metric{background:#f4f7f7;border:1px solid var(--line);border-radius:7px;padding:13px}.metric strong{display:block;font-size:22px;line-height:1.5;font-variant-numeric:tabular-nums}.metric span{display:block;font-size:13px;color:var(--muted)}.metric small{display:block;font-size:12px;color:var(--muted)}.table-wrap{width:100%;overflow-x:auto;margin:16px 0;border:1px solid var(--line);border-radius:6px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:9px 12px;text-align:left;vertical-align:top;border-bottom:1px solid #dfe6e8}th{background:#eaf0f1;font-weight:650}tbody tr:nth-child(even){background:#f8faf9}td{font-variant-numeric:tabular-nums}tr:last-child td{border-bottom:0}.chart{width:100%;margin:16px 0;border:1px solid var(--line);border-radius:8px;background:#fff;overflow:hidden}.chart svg{display:block;width:100%;height:auto}.chart figcaption{font-size:13px;color:var(--muted);padding:4px 16px 12px}.chart text{font-family:var(--body)}.flow{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.flow>span{flex:1;min-width:170px;border:1px solid var(--line);border-radius:7px;padding:12px;background:#f7faf9}.flow b{display:block;font-size:15px}.note{color:var(--muted);font-size:14px}.formula-code{white-space:pre-wrap;word-break:break-word;background:#eef2f4;padding:12px;font-family:ui-monospace,monospace;font-size:13px}.static,.source-details,details.reading-optional{padding:14px 16px;border:1px solid var(--line);border-radius:7px;margin:20px 0}.static{background:#fbfbf7}.static summary,.source-details summary,details.reading-optional>summary{cursor:pointer;font-weight:700}.sources{font-size:13px;overflow-wrap:anywhere}.footer{font-size:13px;color:var(--muted);padding:24px 0}.reader{max-width:900px;margin:0 auto;background:#fff;padding:35px 44px}.reader h1{font-size:32px;line-height:1.4}.reader h2{font-size:25px;line-height:1.45;margin:32px 0 16px}.reader p{margin:15px 0}.reader .math-display{overflow-x:auto;text-align:center;margin:22px 0;padding:4px 0}.math-inline{display:inline-block;max-width:100%;vertical-align:middle}.math-inline svg{max-width:100%;height:auto}.math-display svg{max-width:none}.footnotes{font-size:13px;line-height:1.7;border-top:1px solid var(--line);margin-top:28px;padding-top:15px;overflow-wrap:anywhere}.footnotes li{margin:12px 0}.inline-experiment{border:1px solid var(--line);padding:15px;border-radius:6px;background:var(--wash)}.booknav{max-width:900px;margin:20px auto;display:flex;gap:8px;flex-wrap:wrap}.booknav a{padding:6px 12px;background:#fff;border:1px solid var(--line);border-radius:6px}.log{font-size:14px;padding-left:24px}.log li{margin-bottom:6px}.mono{font-family:ui-monospace,monospace}noscript p{border:2px solid var(--warn);padding:14px}.no-js .controls,.no-js .button-row,.no-js .runtime-output{display:none}.source-details li{margin:9px 0}.small{font-size:13px}.tabs{display:flex;gap:8px;flex-wrap:wrap}.tabs button[aria-selected=true]{background:var(--accent);color:white}.branch-panel{padding-top:8px}.reader .table-wrap th,.reader .table-wrap td{padding:10px;min-width:100px}.reader section{scroll-margin-top:20px}
@media(max-width:640px){header{padding:24px 16px}.layout{padding:12px}.lab{padding:18px 14px}.controls{grid-template-columns:1fr;padding:13px}.metrics{grid-template-columns:1fr 1fr;gap:8px}.metric{padding:10px}.metric strong{font-size:18px}.reader{padding:22px 18px}.reader h1{font-size:26px}.reader h2{font-size:22px}.flow>span{min-width:100%}.booknav{padding:0 15px}}
@media print{body{background:white;color:black}.toolbar,nav,.controls,.button-row,.tabs,.runtime-output,.no-print{display:none!important}.layout{max-width:none;padding:0}.lab,.reader{border:0;box-shadow:none;max-width:none;padding:10px 18px;margin:0}.lab[hidden],.branch-panel[hidden]{display:block!important}.reader h1,.lab h2{break-before:page}.table-wrap{overflow:visible}.static,.source-details{break-inside:avoid}details.reading-optional{display:block}.footer{font-size:10pt}header{background:white;color:black;padding:15px}header p{color:black}a{color:black;text-decoration:none}}

.chart{border:1px solid var(--line);border-radius:7px;background:#fff;margin:16px 0;padding:10px;min-width:0}
.chart svg{display:block;width:100%;height:auto}
.chart figcaption{font-size:14px;line-height:1.6;font-weight:650;color:var(--ink);margin:0 0 10px;overflow-wrap:anywhere}
.chart-axis-label,.chart-unit{font-size:14px;line-height:1.6;color:var(--muted);margin:8px 0;overflow-wrap:anywhere}
.chart-x-label{text-align:center;margin-top:0}
.line-plot{width:100%;min-width:0}
.legend{display:flex;gap:8px 18px;flex-wrap:wrap;font-size:14px;line-height:1.6;margin:0 0 8px}
.legend span{max-width:100%;overflow-wrap:anywhere}
.legend span:before{content:"";display:inline-block;width:22px;margin-right:5px;border-top:3px var(--legend-style,solid) var(--legend);vertical-align:middle}
.bar-list{list-style:none;padding:0;margin:8px 0 0}
.bar-row{margin:0 0 16px;font-size:14px;line-height:1.6}
.bar-row:last-child{margin-bottom:0}
.bar-heading{display:flex;flex-wrap:wrap;gap:2px 12px;align-items:baseline;margin-bottom:5px;font-size:14px}
.bar-label{min-width:0;overflow-wrap:anywhere}
.bar-value{margin-left:auto;font-size:14px;font-weight:650;white-space:nowrap;font-variant-numeric:lining-nums tabular-nums}
.bar-track{position:relative;height:24px;background:#f1f5f7;border-radius:3px}
.bar-track:before{content:"";position:absolute;left:50%;top:0;bottom:0;border-left:1px solid #71858f;z-index:1}
.bar-fill{position:absolute;top:3px;height:18px}
.bar-fill.positive{background:#146c73}.bar-fill.negative{background:#a45d29}
.bar-direction{display:grid;grid-template-columns:1fr auto 1fr;margin:6px 0;font-size:14px;line-height:1.6;color:var(--muted)}
.bar-direction span:last-child{text-align:right}

body,input,select,svg text{font-variant-numeric:lining-nums tabular-nums}.embedded>header,.embedded>footer,.embedded>main>nav{display:none}.embedded>main{padding:0}.embedded .lab{margin:0;box-shadow:none}

.table-wrap th:first-child,.table-wrap td:first-child{min-width:110px}