:root{--bg:#f3f5f1;--paper:#fff;--ink:#17322f;--muted:#667672;--teal:#167d70;--line:#dde5df;--orange:#bb683e}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-size:14px;line-height:1.6}button,input,select{font:inherit}button,a,select{touch-action:manipulation}button,a{cursor:pointer}a{color:var(--teal)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #d59c63;outline-offset:3px}.sidebar{position:fixed;inset:0 auto 0 0;width:230px;padding:34px 24px;background:#133b35;color:#eaf3ed;display:flex;flex-direction:column}.brand{display:flex;gap:12px;color:white;text-decoration:none;font-size:23px;font-weight:700;align-items:center}.brand-mark{color:#bdd99e;font-size:40px}.brand small{display:block;font-size:10px;font-weight:400;letter-spacing:2px;color:#bbd0c5}.side-note{margin:50px 0 28px;color:#acc8bc;font-size:15px;line-height:1.9}.sidebar nav{display:grid;gap:8px}.nav{color:#c4d8cd;background:transparent;border:0;padding:13px 14px;text-align:left;border-radius:8px}.nav.active{color:white;background:#2a5549}.side-bottom{margin-top:auto;color:#c6d9cf;font-size:12px}.side-bottom small{color:#92b5a6}.dot{display:inline-block;background:#b6ce8e;width:7px;height:7px;border-radius:50%;margin-right:7px}main{margin-left:230px;padding:38px 42px 18px;max-width:1800px}header{display:flex;align-items:center;justify-content:space-between;gap:25px}.eyebrow,.kicker{font-size:10px;letter-spacing:2px;color:var(--teal);font-weight:700}h1{font-size:34px;letter-spacing:-1px;margin:7px 0 4px}h2{font-size:24px;letter-spacing:-.6px;margin:0 0 6px}h3{font-size:18px;letter-spacing:-.3px;margin:3px 0 10px}header p,.intro p{color:var(--muted);margin:0}.dataset-label{font-size:11px;color:var(--muted);display:grid;gap:6px;min-width:230px}select,input{background:white;border:1px solid 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h3{margin-bottom:0}.text-link{font-size:11px;text-decoration:none;white-space:nowrap}.caption{color:var(--muted);font-size:11px;margin:13px 0 0}.pill{font-size:11px;border:1px solid #d7e5d9;background:#f3f8ef;color:#506d56;padding:4px 9px;border-radius:20px;white-space:nowrap}.bar-chart{display:grid;gap:7px}.bar-row{display:grid;grid-template-columns:51px 1fr 82px;gap:10px;align-items:center;font-size:11px;border:0;background:transparent;text-align:left;color:var(--ink);padding:2px 0}.bar-row:hover{color:#bd6236}.track{height:15px;background:#f1f5f0;border-radius:3px;overflow:hidden}.bar{display:block;height:100%;background:linear-gradient(90deg,#5fae98,#1f7d70);border-radius:3px}.bar-row.selected .bar{background:#c6814e}.bar-val{text-align:right;font-variant-numeric:tabular-nums}.node-id{font-size:39px;letter-spacing:-1px;font-weight:600;line-height:1.2}.node-id small{font-size:12px;color:var(--muted);font-weight:400;letter-spacing:0;margin-left:9px}.details{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}.details div{border-bottom:1px solid #e8eee8;padding-bottom:8px}.details span{display:block;font-size:10px;color:var(--muted)}.details strong{font-size:18px;font-weight:500;font-variant-numeric:tabular-nums}.insight{font-size:12px;line-height:1.9;background:#f2f7ef;border-left:3px solid #b1c693;padding:12px 15px;color:#4c6554;margin-top:12px}.warning{background:#fff5e9;border-color:#cc965c;color:#785131}.network{height:440px;position:relative;border-radius:10px;background:#f5f8f3;overflow:hidden}.network svg{width:100%;height:100%;display:block;cursor:grab}.network svg:active{cursor:grabbing}.network-bottom{display:flex;justify-content:space-between;color:var(--muted);font-size:10px;margin-top:12px;gap:12px}.legend-node{display:inline-block;border-radius:50%;height:9px;width:9px;background:#cb824d;margin:0 5px 0 8px}.legend-node.pale{background:#8fbeb0}.node-circle{cursor:pointer;stroke:#fff;stroke-width:1.2}.node-circle:hover{stroke:#173b32;stroke-width:2.5}.node-label{font:11px system-ui;fill:#423829;paint-order:stroke;stroke:#f5f8f3;stroke-width:3px;pointer-events:none}.filters{display:flex;gap:15px;align-items:end;flex-wrap:wrap;margin:20px 0}.filters label{font-size:10px;color:var(--muted);display:grid;gap:5px}.filters #row-count{font-size:11px;color:var(--muted);margin-left:auto}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;font-size:12px;white-space:nowrap}th{text-align:left;color:#708276;font-size:10px;font-weight:500;background:#f6f8f3;padding:12px 10px;border-bottom:1px solid var(--line)}td{padding:12px 10px;border-bottom:1px solid #edf1ec;font-variant-numeric:tabular-nums}tbody tr.node-row{cursor:pointer}tbody tr.node-row:hover,tbody tr.selected{background:#edf5eb}td.id{color:var(--teal);font-weight:600}.pager{display:flex;justify-content:flex-end;align-items:center;gap:16px;font-size:11px;margin-top:16px}.subtle{background:white;border:1px solid #dce4da;border-radius:6px;padding:7px 11px;color:#476052;font-size:11px}.subtle:disabled{opacity:.4;cursor:default}.robust-chart svg{width:100%;height:auto;max-height:440px}.figure{display:block;max-width:100%;height:auto;margin:auto}.definitions{display:grid;grid-template-columns:100px 1fr;font-size:12px;gap:15px}.definitions dt{font-weight:600}.definitions dd{margin:0;color:var(--muted)}.provenance{font-size:10px;word-break:break-all;background:#f6f8f3;padding:15px;color:var(--muted)}.paired-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:center}footer{display:flex;justify-content:space-between;gap:20px;font-size:10px;color:#859287;border-top:1px solid var(--line);padding-top:18px;margin-top:18px}@media(max-width:1150px){main{padding:30px 22px}.sidebar{width:190px;padding:28px 18px}main{margin-left:190px}.two-grid{grid-template-columns:1fr}.metrics{gap:10px}.metric{padding:15px}.metric strong{font-size:26px}}@media(max-width:750px){.sidebar{position:static;width:100%;padding:16px 20px;gap:12px}.brand{font-size:20px}.brand-mark{font-size:29px}.brand small,.side-note,.side-bottom{display:none}.sidebar nav{display:flex;gap:3px}.nav{padding:9px 12px;font-size:11px}main{margin:0;padding:24px 16px}header{align-items:start;flex-direction:column;gap:16px}h1{font-size:29px}.dataset-label{width:100%;min-width:0}.trust{gap:10px;font-size:10px}.metrics{grid-template-columns:1fr 1fr;margin-bottom:24px}.panel{padding:18px}.network{height:350px}.network-bottom,footer{flex-direction:column;gap:6px}.paired-grid{grid-template-columns:1fr}.filters{gap:9px}.filters input{width:140px}.definitions{grid-template-columns:70px 1fr;gap:12px}.metric strong{font-size:27px}}

/* Native MathML and the self-contained theory view. */
.theory-jumps{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}.theory-jumps a{border:1px solid #cfded1;border-radius:30px;background:#eaf1e6;padding:7px 13px;font-size:12px;text-decoration:none}.theory-jumps a:hover{background:#dcebd9}.theory-lead{font-size:14px;line-height:1.95;color:#4a6256;margin:10px 0 22px}#theory article{scroll-margin-top:20px}#theory h4{font-size:14px;margin:0 0 10px;font-weight:650}#theory p{line-height:1.95}#theory .caption{line-height:1.8}.formula-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px}.formula-card{background:#f6f9f3;border:1px solid #e0e8db;border-radius:9px;padding:18px;min-width:0}.formula-card p{font-size:12px;color:#53695a;margin:12px 0 0}.formula-wide{grid-column:1/-1}.math-wrap{overflow-x:auto;max-width:100%;padding:13px 2px 15px;color:#174f42}.math-wrap math{font-family:"Cambria Math","STIX Two Math",math;font-size:20px;margin:0 auto;min-width:max-content}.theory-detail{border-top:1px solid var(--line);padding:17px 0 0;margin-top:20px}.theory-detail summary{cursor:pointer;color:var(--teal);font-size:13px;font-weight:650;line-height:1.8}.theory-detail[open] summary{margin-bottom:17px}.theory-detail p{font-size:12px;color:#52695d}.theory-note{font-size:12px;padding:14px 16px;border-radius:7px;background:#eef4e9;color:#4e6754}.example-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:22px;align-items:stretch}.toy-controls{display:flex;gap:14px;flex-wrap:wrap}.toy-controls label,.glossary-search{display:grid;gap:6px;font-size:11px;color:var(--muted)}.toy-controls select{padding:8px 10px}.toy-graph{margin-top:16px;background:#f4f7f1;border:1px solid #e2e9dd;border-radius:10px}.toy-graph svg{display:block;width:100%;height:auto;max-height:300px}.toy-edge{stroke:#c8d6c8;stroke-width:4;stroke-linecap:round}.toy-edge.on-path{stroke:#cb8a54;stroke-width:5}.toy-circle{fill:white;stroke:#b4c8b5;stroke-width:2;cursor:pointer}.toy-circle.endpoint{fill:#d6ead7;stroke:#6c9a7b}.toy-circle.observed{stroke:#164e41;stroke-width:4}.toy-circle:focus-visible{outline:0;stroke:#bd6438;stroke-width:5}.toy-label{font:600 18px "Microsoft YaHei",system-ui;fill:#244b3c;pointer-events:none}.toy-explanation{background:#f5eee2;padding:24px;border-radius:10px}.toy-share{font:600 28px "Cambria Math",system-ui;color:#88562f;line-height:1.5;overflow-wrap:anywhere;margin:12px 0}.toy-explanation p{font-size:12px;color:#6c5d48}.toy-paths{display:grid;gap:8px;font-size:13px}.toy-paths span{display:block;border:1px solid #e1d5c1;background:#fffaf0;padding:7px 10px;border-radius:6px}.algorithm-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:20px}.algorithm-steps>div{background:#f6f8f3;border-radius:9px;padding:18px}.algorithm-steps>div>span{display:inline-grid;place-items:center;width:27px;height:27px;border-radius:50%;background:#dcebd6;color:#31563b;font-size:12px;margin-bottom:12px}.algorithm-steps p,.mode-card p{font-size:12px;color:#566d5f;margin-bottom:0}.mode-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:14px}.mode-card{border-top:3px solid #81a58b;border-radius:4px 4px 9px 9px;background:#f6f9f3;padding:18px;min-width:0}.mode-card code{font-size:11px;color:var(--teal);overflow-wrap:anywhere}.mode-card h4{margin-top:12px!important}.batch-strip{display:flex;flex-wrap:wrap;gap:5px;margin-top:16px}.batch-strip span{background:#e4eee0;color:#496650;font-size:10px;padding:4px 7px;border-radius:4px}.explain-table{white-space:normal;margin-top:18px}.explain-table td:first-child{width:155px;font-weight:600}.explain-table td{vertical-align:top;font-size:12px;line-height:1.9}.glossary-search{max-width:440px;margin:0 0 20px}.glossary-search input{width:100%}.glossary-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;align-items:start}.term-card{border:1px solid #dfe8db;border-radius:8px;background:#f8faf5;padding:15px 17px;min-width:0}.term-card[hidden]{display:none}.term-card summary{cursor:pointer;font-size:12px;color:#285b46}.term-card summary strong{font-weight:650}.term-card summary span{display:block;font-size:11px;color:#7a8878;margin:4px 0 0 16px}.term-card p{font-size:12px;color:#566c5e;margin:12px 0 0}.theory-sources p,.theory-sources li{font-size:12px;color:#607164}.theory-sources li{margin:7px 0}.theory-sources a{overflow-wrap:anywhere}.theory-jumps a:focus-visible,.theory-detail summary:focus-visible,.term-card summary:focus-visible{outline:3px solid #d59c63;outline-offset:3px}
@media(max-width:1150px){.algorithm-steps,.mode-grid{grid-template-columns:1fr}.example-grid{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}}
@media(max-width:750px){.sidebar nav{flex-wrap:wrap}.formula-grid,.example-grid,.glossary-grid{grid-template-columns:1fr}.formula-wide{grid-column:auto}.math-wrap math{font-size:18px}.formula-card{padding:14px}.toy-explanation{padding:18px}.toy-share{font-size:24px}.toy-controls label{flex:1;min-width:130px}.theory-jumps{gap:6px}.theory-jumps a{font-size:11px;padding:6px 10px}.explain-table td:first-child{width:88px}#theory .pill{white-space:normal;text-align:right;max-width:42%}}

.concept-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0 0 22px}.concept-pair>div{background:#e6eee0;border-top:2px solid #91b08b;padding:18px 22px;border-radius:3px 3px 9px 9px}.concept-pair span{display:block;font-size:11px;color:#66816a}.concept-pair strong{display:block;font-size:20px;margin:4px 0}.concept-pair p{font-size:12px;color:#526b58;margin:0}.brandes-lesson{border:1px solid #d9e5d3;background:#fcfdf9;border-radius:10px;padding:20px;margin:20px 0}.brandes-lesson .panel-head{margin-bottom:5px}.lesson-step-nav{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0}.lesson-step{font-size:11px;padding:8px 10px;border-radius:6px;border:1px solid #d6e1d0;color:#587051;background:white}.lesson-step.active{background:#2a5c45;color:white;border-color:#2a5c45}.lesson-narrative{background:#edf4e7;border-radius:8px;padding:16px 18px;margin-bottom:15px;min-height:170px}.lesson-narrative p{font-size:12px;color:#4e674f;margin:7px 0}.lesson-equation{font-family:"Cambria Math","Microsoft YaHei",serif;font-size:18px;color:#285640;overflow-wrap:anywhere}.brandes-lesson td{font-size:12px}.lesson-controls{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:16px}.lesson-controls span{font-size:10px;color:#7b8d77}.trace-source{background:#f3f5ed}.trace-final{color:#136753;font-weight:650}@media(max-width:750px){.concept-pair{grid-template-columns:1fr;gap:10px}.concept-pair>div{padding:15px 18px}.brandes-lesson{padding:14px}.lesson-narrative{padding:14px;min-height:210px}.lesson-controls span{max-width:100px;text-align:center}.lesson-step{padding:7px 9px}.lesson-equation{font-size:17px}}

.scatter-panel .figure{width:100%;height:auto}.paired-chart-link{display:block;min-width:0}.paired-chart-link .figure{width:100%}