.owned-knowledge-card{margin:18px 0;border:1px solid #cad8cf;border-radius:16px;background:#fbfcf7;overflow:hidden}.owned-knowledge-card header{display:grid;gap:6px;padding:17px 20px;background:#e8f1e5;border-bottom:1px solid #cfdbd2}.owned-knowledge-card header span{color:#187158;font-size:12px;letter-spacing:.06em}.owned-knowledge-card header b{font-size:20px}.knowledge-detail-row{display:grid;grid-template-columns:105px 1fr;gap:14px;padding:13px 20px;border-bottom:1px solid #e1e7e2}.knowledge-detail-row>b{color:#184d3c}.knowledge-detail-row p{margin:0;line-height:1.7;color:#425b52}.knowledge-related-cases{padding:15px 20px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}.knowledge-related-cases>b{width:100%;margin-bottom:2px}.knowledge-related-cases span{background:#eef2df;color:#315341;border-radius:30px;padding:7px 10px;font-size:13px}@media(max-width:700px){.knowledge-detail-row{grid-template-columns:1fr;gap:5px}}

/* 学习选择与理论区统一提升可读性 */
.choice-intro p{font-size:15px;line-height:1.75}.choice-controls label{font-size:14px}.choice-controls select{font-size:15px;height:44px}.choice-controls .primary-btn{height:44px}.free-study>span,.free-study input,.free-study button{font-size:14px}.free-study input,.free-study button{height:44px}
.lesson-location{padding:14px 16px}.lesson-location b{font-size:16px;line-height:1.55}.lesson-location span{font-size:14px;line-height:1.55;margin-top:6px}.lesson-summary h4{font-size:28px}.lesson-summary>p{font-size:16px;line-height:1.75}.owned-knowledge-card header span{font-size:14px}.owned-knowledge-card header b{font-size:24px}.knowledge-detail-row>b{font-size:16px}.knowledge-detail-row p{font-size:16px;line-height:1.8}.knowledge-related-cases span{font-size:14px}.kb-answer{font-size:15px}.kb-answer>p,.kb-evidence p{font-size:15px;line-height:1.75}.kb-evidence b{font-size:14px}.kb-sources a,.kb-sources span,.kb-route{font-size:13px}.follow-up-prompts button{font-size:14px;padding:9px 13px}.model-visual-head b{font-size:16px}.model-visual-head span{font-size:13px}
.externality-model svg{height:auto;max-height:410px;background:#fcfdf8;border-radius:10px}.externality-model .axis{stroke:#68756e;stroke-width:1.8}.externality-model .axis-label{font-size:14px;font-weight:700;fill:#314b41}.externality-model .curve-label,.externality-model .point-label,.externality-model .quantity-label,.externality-model .mec-label{font-size:13px;font-weight:700}.externality-model .guide{stroke:#87958d;stroke-width:1.3;stroke-dasharray:6 5}.externality-model .model-point{fill:#0f6b4d;stroke:#fff;stroke-width:2}.externality-model .model-point.market{fill:#b85d4b}.externality-model .mec-bracket{fill:none;stroke:#59685f;stroke-width:1.5}.model-legend{display:flex;gap:16px;flex-wrap:wrap;padding:5px 8px 13px;font-size:14px}.model-legend span{display:flex;align-items:center;gap:6px}.model-legend i{width:20px;height:3px;border-radius:3px}.legend-msc{background:#0f6b4d}.legend-mpc{background:#9eae54}.legend-mb{background:#b85d4b}.model-explanation{background:#eef3e4;border-left:4px solid var(--green);padding:16px 18px;font-size:15px;line-height:1.75}.model-explanation>b{font-size:17px}.model-explanation ol{margin:8px 0 8px 20px;padding:0}.model-explanation li{margin:5px 0}.model-explanation p{margin:10px 0 0}
@media(max-width:700px){.choice-controls select{font-size:14px}.lesson-location b{font-size:15px}.knowledge-detail-row p,.lesson-summary>p{font-size:15px}.model-legend{gap:8px}.externality-model .axis-label,.externality-model .curve-label,.externality-model .point-label{font-size:11px}}
.unified-model svg{height:auto;max-height:390px;background:#fcfdf8;border-radius:10px}.unified-model .axis{stroke:#68756e;stroke-width:1.8;fill:none}.unified-model .axis-label,.unified-model .curve-label,.unified-model .point-label,.unified-model .quantity-label{font-size:14px;font-weight:700;fill:#314b41}.unified-model .guide{stroke:#87958d;stroke-width:1.3;stroke-dasharray:6 5}.unified-model .model-point{fill:#0f6b4d;stroke:#fff;stroke-width:2}.mechanism-diagram{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:10px;align-items:center;padding:24px 10px}.mechanism-diagram span{min-height:108px;display:flex;flex-direction:column;justify-content:center;background:#f0f4e8;border:1px solid #d3ddcf;border-radius:12px;padding:14px;font-size:14px;line-height:1.6}.mechanism-diagram span b{display:block;color:var(--green);font-size:16px;margin-bottom:7px}.mechanism-diagram i{font-style:normal;color:var(--green);font-size:22px}.unified-model .model-explanation>p{font-size:15px;line-height:1.75;margin:6px 0 13px}@media(max-width:850px){.mechanism-diagram{grid-template-columns:1fr}.mechanism-diagram i{transform:rotate(90deg);text-align:center}.unified-model .axis-label,.unified-model .curve-label,.unified-model .point-label{font-size:12px}}
.unified-model .label-leader{fill:none;stroke:#718078;stroke-width:1.2}.unified-model .annotation-label{font-size:12px;font-weight:700;fill:#617069}.unified-model .model-point.market{fill:#b85d4b}.externality-model .label-leader{fill:none;stroke:#718078;stroke-width:1.2}
.world-state{display:grid;grid-template-columns:1.2fr repeat(4,1fr);gap:8px;align-items:stretch;margin-top:18px}.world-state>span{display:flex;align-items:center;color:var(--green);font-size:13px;font-weight:800}.world-state>div{background:#fff;border:1px solid #dde4dc;border-radius:9px;padding:10px}.world-state b,.world-state small{display:block}.world-state b{font-family:serif;font-size:20px;color:var(--green)}.world-state small{font-size:12px;color:var(--muted);margin-top:3px}.stakeholder-alert{display:grid;grid-template-columns:125px 1fr;gap:12px;margin-top:12px;padding:12px;background:#e9f0dc;border-left:3px solid var(--green);font-size:14px;line-height:1.65}.numeric-decision>span{display:block;font-size:15px;font-weight:800;color:var(--green);margin-bottom:14px}.numeric-row{padding:15px 0;border-bottom:1px solid var(--line)}.numeric-row header{align-items:center}.numeric-row header label{display:flex;align-items:center;gap:5px}.numeric-manual{width:92px;height:38px;border:1px solid #c9d2cb;border-radius:7px;padding:0 9px;background:#fff;font-size:15px}.numeric-row header em{font-style:normal;font-size:14px;color:var(--muted)}.numeric-row footer{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;margin-top:8px}.numeric-row footer span:last-child{text-align:right}.numeric-row footer output{font-weight:800;color:var(--green);font-size:13px}.decision-option small{font-size:14px;line-height:1.6}.decision-option em{display:block;font-style:normal;color:var(--green);font-size:12px;margin-top:8px}.round-consequence span{font-size:15px;line-height:1.8}.decision-reason label{font-size:15px}.decision-reason textarea{font-size:15px;line-height:1.6}@media(max-width:850px){.world-state{grid-template-columns:1fr 1fr}.world-state>span{grid-column:1/-1}.stakeholder-alert{grid-template-columns:1fr}.numeric-row footer{grid-template-columns:1fr}}