@charset "UTF-8";
:root{--paper:#f5f4ef;--white:#fffefa;--ink:#20302c;--muted:#68746e;--line:#d9ded3;--dark:#1c2827;--mint:#d6ee91;--green:#3c6552;--orange:#b15b3c;--light:#eaf0e2;--mono:"Cascadia Code","SFMono-Regular",Consolas,monospace;--sans:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;--radius:16px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.75 var(--sans)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,summary,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,summary:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--orange);outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.4}h1{font-size:clamp(30px,3.2vw,48px);letter-spacing:-1.5px;font-weight:750}h2{font-size:25px;letter-spacing:-.6px}h3{font-size:18px}p{color:var(--muted)}small{font-size:12px}code{font-family:var(--mono);font-size:.86em;background:#e6eadd;border-radius:4px;padding:3px 5px;overflow-wrap:anywhere}ul,ol{padding-left:22px;margin:12px 0}li+li{margin-top:8px}.skip{position:fixed;top:-80px;left:12px;z-index:20;background:var(--mint);padding:10px 20px}.skip:focus{top:12px}
.sidebar{position:fixed;inset:0 auto 0 0;width:250px;background:var(--dark);color:#edf1e6;padding:35px 24px;display:flex;flex-direction:column;z-index:10}.brand{display:flex;align-items:center;gap:13px;font-size:26px;line-height:1;font-weight:650;letter-spacing:-1px}.brand svg{width:36px;stroke:var(--mint);stroke-width:2.5;stroke-linecap:round;fill:none}.brand-sub{display:block;margin-top:12px;font:9px/1 var(--mono);letter-spacing:1px;color:#9caaa1}.side-rule{height:1px;background:#3c4741;margin:35px 0 27px}.nav-caption{font-size:10px;letter-spacing:2px;color:#a8b4a9;display:block;margin-bottom:15px}.sidebar nav{display:flex;flex-direction:column;gap:7px}.sidebar nav a{display:flex;align-items:center;gap:13px;padding:12px 10px;border-radius:7px;color:#bfc9bf;font-size:13px}.nav-no{font:10px var(--mono);color:#7f9184}.nav-arrow{margin-left:auto;opacity:0}.sidebar nav a.active{background:var(--mint);color:#213327;font-weight:650}.sidebar nav a.active .nav-no{color:#526637}.sidebar nav a.active .nav-arrow{opacity:1}.sidebar nav a:hover:not(.active){background:#2b3834;color:white}.side-bottom{margin-top:auto;padding-top:40px}.side-bottom strong{float:right;color:var(--mint);font:12px var(--mono);letter-spacing:0}.progress-track{height:4px;background:#435046;border-radius:5px;overflow:hidden}.progress-track>div{height:100%;width:0;background:var(--mint)}.side-note{font-size:11px;line-height:1.9;margin:18px 0 34px;color:#99a99c}.edition{font:9px var(--mono);color:#a8b4a9;display:flex;justify-content:space-between;letter-spacing:1px}.workspace{margin-left:250px}.topbar{height:78px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 5%;font-size:11px;color:var(--muted)}.live-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#719568;margin-right:9px}.version{font:10px var(--mono);border:1px solid var(--line);border-radius:30px;padding:6px 12px;background:var(--white)}.version span{margin:0 5px;color:#9da997}main{max-width:1440px;margin:auto;padding:48px 5% 65px;min-height:calc(100vh - 160px)}footer{border-top:1px solid var(--line);padding:22px 5%;display:flex;gap:20px;justify-content:space-between;color:var(--muted);font-size:10px}.eyebrow{font:11px/1.5 var(--mono);letter-spacing:2px;color:var(--green);display:flex;align-items:center;gap:10px;margin-bottom:15px}.eyebrow:before{content:"";display:block;width:23px;height:1px;background:currentColor}.page-head{margin-bottom:32px}.page-head p{max-width:760px;margin-top:14px;font-size:14px}.tag{font:10px var(--mono);display:inline-flex;align-items:center;border:1px solid var(--line);padding:4px 9px;border-radius:4px;letter-spacing:.3px;color:var(--green)}.tag.warm{color:var(--orange);background:#fcf0e9;border-color:#e4c9b8}.tag.dark{background:#30433a;color:var(--mint);border-color:#4e6353}.section-line{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:34px 0 18px}.section-line h2{font-size:20px}.section-line small{font:10px var(--mono);color:var(--muted);letter-spacing:1px}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--ink);border-radius:7px;background:var(--ink);color:#fffefa;padding:11px 18px;font-size:13px;font-weight:550;min-height:44px}.button:hover{background:var(--green);border-color:var(--green)}.button.secondary{background:transparent;color:var(--ink);border-color:var(--line)}.button.secondary:hover{background:var(--light)}.button.lime{background:var(--mint);color:var(--dark);border-color:var(--mint)}.text-link{font-size:12px;color:var(--green);border-bottom:1px solid #a6b6a2}.actions{display:flex;gap:10px;flex-wrap:wrap}.panel{border:1px solid var(--line);background:var(--white);border-radius:var(--radius);padding:26px}.muted{color:var(--muted)}.note{padding:15px 18px;border-left:3px solid #9aad7e;background:#e9eedf;font-size:12px;color:#4e604c;line-height:1.9}.note.warm{border-color:var(--orange);background:#f4e9df;color:#835238}.source-link{display:inline-flex;gap:6px;align-items:baseline;font:10px/1.7 var(--mono);color:var(--green);overflow-wrap:anywhere;word-break:break-word;border-bottom:1px dotted #a9b8a4}.source-list{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:14px}
/* 总览：静态构图，动效只出现在教学播放器中。 */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:36px;align-items:stretch}.hero h1{font-size:clamp(37px,4.2vw,62px);line-height:1.28;letter-spacing:-2px;margin-top:25px}.hero h1 em{font-style:normal;position:relative;background:linear-gradient(transparent 62%,#d5e7aa 62%);padding-right:7px}.hero-copy>p{max-width:440px;margin:24px 0;font-size:14px;line-height:1.95}.hero-copy .actions{margin-top:28px}.hero-meta{display:flex;gap:30px;margin-top:32px;font:10px var(--mono);color:var(--muted)}.hero-meta strong{display:block;color:var(--ink);font-size:24px;margin-bottom:5px}.system-map{background:var(--dark);border-radius:18px;padding:26px;color:#edf1e6;min-height:410px;display:flex;flex-direction:column;position:relative;overflow:hidden}.map-head{display:flex;justify-content:space-between;font:9px var(--mono);letter-spacing:1.5px;color:#adbfad}.map-dot{width:7px;height:7px;background:var(--mint);border-radius:50%;display:inline-block;margin-right:5px}.system-map svg{width:100%;flex:1;min-height:300px;max-height:350px}.map-foot{border-top:1px solid #425248;padding-top:15px;font-size:10px;color:#b1bfae;display:flex;justify-content:space-between}.overview-bottom{display:grid;grid-template-columns:1.15fr 1fr;gap:25px;margin-top:34px}.start-card{display:grid;grid-template-columns:60px 1fr;gap:20px;border:1px solid var(--line);border-radius:12px;background:var(--white);padding:25px}.big-no{font:42px/1 var(--mono);color:#9aaf7d}.start-card h3{margin:4px 0 9px}.start-card p{font-size:12px;margin-bottom:18px}.questions{border-top:1px solid var(--line)}.question-row{padding:16px 0;border-bottom:1px solid var(--line);display:flex;gap:15px;align-items:center;font-size:13px}.question-row span:first-child{font:10px var(--mono);color:var(--green)}.question-row b{margin-left:auto;font-weight:400}.small-print{font-size:11px;line-height:1.9;color:var(--muted)}
/* 学习路线 */
.learning-layout{display:grid;grid-template-columns:255px minmax(0,1fr);gap:28px;align-items:start}.lesson-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}.lesson-button{border:0;border-bottom:1px solid var(--line);padding:18px 12px;background:transparent;text-align:left;display:grid;grid-template-columns:29px 1fr 16px;gap:10px;align-items:start;color:var(--ink)}.lesson-button:hover{background:#e9edde}.lesson-button.selected{background:var(--ink);color:white;border-radius:8px;border-bottom-color:transparent}.lesson-button .lesson-num{font:14px var(--mono);color:#85996e;padding-top:3px}.lesson-button.selected .lesson-num{color:var(--mint)}.lesson-button strong{display:block;font-size:13px;line-height:1.6}.lesson-button small{color:var(--muted);font-size:10px;display:block;margin-top:5px}.lesson-button.selected small{color:#b5c4b2}.lesson-check{font-size:12px;color:var(--green)}.lesson-button.selected .lesson-check{color:var(--mint)}.lesson-body{min-width:0}.lesson-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}.lesson-heading h2{font-size:26px;margin:9px 0 12px}.lesson-body .intro{font-size:13px;margin-bottom:22px}.lead-question{font-size:18px;line-height:1.7;border-left:3px solid var(--green);padding:3px 0 3px 18px;margin:22px 0;color:var(--ink)}.reading-list{margin:12px 0 25px}.reading-row{display:block;padding:10px 0;border-bottom:1px solid var(--line);font-size:12px}.reading-row span{display:block;color:var(--muted);font:10px/1.9 var(--mono);overflow-wrap:anywhere}.study-pair{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:25px 0}.field-label{display:block;font:10px var(--mono);letter-spacing:1px;color:var(--green);margin-bottom:9px}.study-pair p{font-size:13px;color:var(--ink);line-height:1.9}.checklist{list-style:none;padding:0}.checklist li{padding:9px 0 9px 26px;position:relative;font-size:13px;border-bottom:1px solid var(--line)}.checklist li:before{content:"□";position:absolute;left:0;color:var(--green)}details{border-bottom:1px solid var(--line);padding:13px 0}summary{cursor:pointer;color:var(--ink);font-size:13px}details p{font-size:12px;margin-top:12px;padding-left:17px;line-height:1.9}.quiz{background:#e9eedf;border-radius:10px;padding:23px;margin-top:26px}.quiz h3{font-size:16px;margin:10px 0 16px}.quiz-option{display:flex;align-items:flex-start;gap:10px;padding:9px 0;font-size:12px;cursor:pointer;line-height:1.7}.quiz-option input{margin-top:5px;accent-color:var(--green)}.quiz .button{margin-top:14px;font-size:12px;padding:8px 15px;min-height:38px}.quiz-result{font-size:12px;margin-top:15px;color:var(--ink);padding:12px;border:1px solid #adbda2}.quiz-result:empty{display:none}.completion{display:flex;gap:10px;align-items:flex-start;font-size:12px;margin:25px 0}.completion input{margin-top:5px;accent-color:var(--green)}.exercise-contract{margin:28px 0;background:var(--dark);color:#e0eadb;padding:24px;border-radius:12px}.exercise-contract p{color:#b8c6b5;font-size:12px}.exercise-contract pre{overflow-x:auto;font:11px/1.8 var(--mono);padding:16px 0;border-top:1px solid #415345;margin:14px 0 0;white-space:pre-wrap;overflow-wrap:anywhere}.exercise-contract code{color:var(--mint);background:#30433a}.review-strip{display:flex;gap:20px;flex-wrap:wrap;margin:25px 0;padding:17px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:11px}.review-strip b{font-family:var(--mono);color:var(--green);margin-right:8px}.progress-actions{display:flex;gap:15px;margin-top:20px;align-items:center;flex-wrap:wrap}.progress-actions button{font-size:11px}
/* 两个重难点播放器 */
.lab-label{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px;gap:12px}.lab-label small{font:10px var(--mono);color:var(--muted)}.player{border:1px solid var(--line);border-radius:17px;overflow:hidden;background:var(--white)}.diagram{background:var(--dark);color:white;padding:25px 28px 14px}.diagram-top{display:flex;justify-content:space-between;gap:12px;font:10px var(--mono);color:#aabeaa;letter-spacing:1px}.trace-svg{display:block;width:100%;height:auto;margin:8px auto 0}.trace-svg text{font-family:var(--sans)}.trace-node rect{fill:#293b32;stroke:#50644e;stroke-width:1}.trace-node text{fill:#c9d6c1}.trace-node.active rect{fill:#d6ee91;stroke:#d6ee91}.trace-node.active text{fill:#243827}.trace-svg .connector{stroke:#657d5a;stroke-width:1.3;fill:none}.trace-svg .return{stroke:#a1b783;stroke-dasharray:5 5;fill:none}.trace-svg .signal{fill:var(--mint)}.trace-svg .caption{fill:#9daf99;font-size:10px}.playing .trace-svg .signal{animation:signal-pulse 1.1s ease-in-out infinite}.playing .trace-svg .return{animation:dash 1.4s linear infinite}@keyframes signal-pulse{50%{opacity:.2;r:7}}@keyframes dash{to{stroke-dashoffset:-20}}.step-buttons{display:flex;gap:6px;flex-wrap:wrap;padding:18px 25px 0}.step-buttons button{border:1px solid var(--line);border-radius:30px;background:transparent;color:var(--muted);font-size:11px;padding:5px 10px}.step-buttons button.active{background:var(--light);color:var(--ink);border-color:#a4ba81}.step-info{padding:24px 28px;display:grid;grid-template-columns:1.1fr 1fr;gap:32px;min-height:220px}.step-info h3{font-size:22px;margin:8px 0 12px}.step-info p{font-size:13px;line-height:1.95}.payload{background:#eef1e8;border-radius:8px;padding:18px;font:11px/1.8 var(--mono);white-space:pre-wrap;overflow-wrap:anywhere;color:var(--green);margin:0}.player-controls{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:17px 25px;border-top:1px solid var(--line);background:#fafaf5}.player-controls .actions{gap:7px}.player-controls .button{font-size:11px;min-height:36px;padding:7px 12px}.player-count{font:11px var(--mono);color:var(--muted)}.concept-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}.concept-pair h3{margin-bottom:10px}.concept-pair p{font-size:12px}.concept-pair .panel{padding:22px}.branch-note{display:flex;align-items:center;gap:15px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0;margin-top:24px;font-size:13px}.branch-note>span{font:22px var(--mono);color:var(--orange)}.branch-note p{font-size:12px}.voice-journey{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:30px}.journey-cell{padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white);min-width:0}.journey-number{display:flex;justify-content:space-between;font:11px var(--mono);color:var(--green);margin-bottom:13px}.journey-cell h3{font-size:16px;margin-bottom:10px}.journey-cell p{font-size:12px;line-height:1.9}.journey-cell .payload{font-size:10px;padding:10px;margin:12px 0}.model-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:20px}.model-tabs button{border:1px solid var(--line);background:var(--white);border-radius:7px;padding:10px 18px;font-size:12px;color:var(--muted)}.model-tabs button.active{background:var(--ink);color:var(--mint);border-color:var(--ink)}.model-flow{display:flex;gap:10px;align-items:stretch;padding:28px 0 23px;overflow-x:auto}.model-node{flex:1;min-width:130px;padding:20px 13px;border:1px solid #53634f;border-radius:8px;color:#c8d5be;position:relative}.model-node:not(:last-child):after{content:"→";position:absolute;right:-12px;top:44%;color:#a7ba90;background:var(--dark);z-index:1}.model-node.active{background:var(--mint);color:#263827;border-color:var(--mint)}.model-node span{font:10px var(--mono);opacity:.7;display:block;margin-bottom:12px}.model-node strong{font-size:13px;line-height:1.7;display:block}.model-flow.playing .model-node.active{animation:node-outline 1.6s ease-in-out infinite}@keyframes node-outline{50%{box-shadow:0 0 0 5px #d6ee9120}}.model-summary{font-size:13px;line-height:1.9;margin:18px 0}.field-table{width:100%;border-collapse:collapse;font-size:12px;margin:20px 0}.field-table th{text-align:left;font-weight:500;color:var(--muted);font-size:10px;background:#eaf0e2;letter-spacing:1px}.field-table th,.field-table td{padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}.field-table code{background:none;padding:0}.field-table td:first-child{width:25%}.table-wrap{overflow-x:auto}.pitfalls{display:grid;grid-template-columns:1fr 1fr;gap:0 28px}.pitfall{padding:20px 0;border-top:1px solid var(--line)}.pitfall h3{font-size:15px;margin-bottom:9px}.pitfall p{font-size:12px}
/* 优化与证据 */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:25px}.filter-bar button{padding:8px 15px;border:1px solid var(--line);background:transparent;border-radius:30px;color:var(--muted);font-size:12px}.filter-bar button.active{background:var(--ink);color:var(--mint);border-color:var(--ink)}.optimization-list{border-top:1px solid var(--line)}.opt-item{border-bottom:1px solid var(--line);padding:24px 0}.opt-item summary{list-style:none;display:grid;grid-template-columns:45px minmax(0,1fr) 145px 20px;gap:15px;align-items:start}.opt-item summary::-webkit-details-marker{display:none}.opt-item .opt-no{font:23px var(--mono);color:#8ba174}.opt-item h3{font-size:19px}.opt-meta{display:flex;gap:7px;margin-top:9px;flex-wrap:wrap}.opt-arrow{font-size:20px;color:var(--green)}.opt-item[open] .opt-arrow{transform:rotate(45deg)}.opt-cost{text-align:right;font-size:11px;color:var(--muted);padding-top:4px}.opt-content{margin-left:60px;padding-top:22px;max-width:850px}.opt-content>p{padding:0;margin:8px 0 20px;font-size:13px}.opt-content h4{font-size:11px;letter-spacing:1px;color:var(--green);margin:20px 0 6px}.opt-content ul{font-size:12px;color:var(--ink)}.evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.evidence-grid h3{margin:14px 0}.evidence-grid p{font-size:12px}.evidence-level{font:34px var(--mono);color:#8da674}.evidence-grid .panel:last-child .evidence-level{color:var(--orange)}.ledger{width:100%;border-collapse:collapse;font-size:12px}.ledger th{text-align:left;padding:13px 16px;border-bottom:1px solid var(--ink);color:var(--muted);font-weight:500;font-size:11px}.ledger td{padding:17px 16px;border-bottom:1px solid var(--line);vertical-align:top}.ledger th:first-child{width:24%}.ledger .status{font:10px var(--mono);white-space:nowrap}.status.known{color:var(--green)}.status.pending{color:var(--orange)}.evidence-note{font-size:12px;margin:22px 0}.source-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 30px}.source-grid a{display:block;padding:12px 0;border-bottom:1px solid var(--line);font-size:12px}.source-grid small{display:block;color:var(--muted);font:10px/1.7 var(--mono);margin-top:5px;word-break:break-word}.toast{position:fixed;bottom:26px;left:calc(50% + 125px);transform:translateX(-50%);border-radius:7px;padding:12px 22px;background:var(--ink);color:var(--mint);font-size:12px;z-index:30;display:none}.toast.show{display:block}.noscript{padding:30px;margin:30px;background:white;position:fixed;inset:100px 20px auto 270px;z-index:50}
.condition-panel{display:grid;grid-template-columns:1fr 1.1fr;gap:25px;border:1px solid var(--line);border-radius:12px;padding:22px;margin:22px 0;background:var(--white);align-items:start}.condition-panel .payload{font-size:10px;padding:16px;line-height:1.7}.condition-buttons{display:flex;flex-direction:column;gap:8px;margin-top:15px}.condition-buttons button{border:1px solid var(--line);background:transparent;border-radius:6px;padding:9px 12px;font-size:12px;text-align:left;color:var(--muted)}.condition-buttons button.active{border-color:var(--green);background:var(--light);color:var(--ink)}.condition-buttons button.active:before{content:'✓ ';color:var(--green)}.condition-panel p{font-size:11px;margin-top:16px}.model-node.skipped{border-style:dashed;opacity:.65}
@media(max-width:650px){.condition-panel{grid-template-columns:1fr;padding:18px;gap:16px}.condition-buttons{flex-direction:row;flex-wrap:wrap}.condition-buttons button{font-size:11px}}
@media(min-width:1600px){main{padding-top:65px}.hero{gap:60px}.hero h1{font-size:64px}.system-map{min-height:440px}}
@media(max-width:1180px){.sidebar{width:218px;padding:30px 18px}.workspace{margin-left:218px}.hero{gap:25px}.hero h1{font-size:44px}.hero-copy>p{font-size:13px}.system-map{padding:22px;min-height:370px}.system-map svg{min-height:250px}.learning-layout{grid-template-columns:215px minmax(0,1fr);gap:20px}.study-pair{grid-template-columns:1fr}.toast{left:calc(50% + 109px)}.hero-meta{gap:23px}}
@media(max-width:960px){.sidebar{width:190px;padding:28px 15px}.workspace{margin-left:190px}.brand{font-size:24px}.brand-sub{font-size:7px}.sidebar nav a{font-size:12px;gap:9px}.hero{grid-template-columns:1fr}.hero h1{font-size:52px;margin-top:12px}.hero h1 br:nth-of-type(2){display:none}.hero-copy>p{max-width:550px}.hero-meta{margin-bottom:12px}.system-map{min-height:350px}.system-map svg{height:270px;flex:none}.overview-bottom{grid-template-columns:1fr}.learning-layout{grid-template-columns:1fr}.lesson-list{display:grid;grid-template-columns:1fr 1fr;margin-bottom:8px}.lesson-button{padding:12px}.step-info{grid-template-columns:1fr;gap:18px}.voice-journey{grid-template-columns:1fr 1fr}.evidence-grid{grid-template-columns:1fr}.evidence-grid .panel{display:grid;grid-template-columns:42px 1fr;gap:0 18px}.evidence-grid h3{margin:0 0 8px}.evidence-grid p{grid-column:2}.opt-item summary{grid-template-columns:36px 1fr 20px}.opt-cost{display:none}.opt-content{margin-left:51px}.topbar{font-size:10px}.version{font-size:9px}.toast{left:calc(50% + 95px)}footer>span:nth-child(2){display:none}}
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