/* 课程阅读区；交互面板保留深色，以状态而非装饰突出重点。 */
.docs-body{--text:#25392e;--muted:#526950;--mint:#286b4d;background:#f7f8f3;color:#31472f;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif}
.docs-top{background:#f7f8f3f5;border-color:#d6dfce}.docs-brand{color:#27402c}.docs-brand span{color:#47845b}.docs-badge{color:#5f7358;border-color:#cedbc4;font-size:12px}.docs-links{font-size:12px}.docs-links a{color:#51684a}.docs-progress{font-size:11px;color:#5c7052;border-color:#cedac5}.side-toggle{color:#34552e;border-color:#b6c8a8}
.docs-shell{grid-template-columns:235px minmax(0,1fr) 170px;max-width:1550px}.docs-side{background:#eff3e9;border-color:#d6dfce;padding:22px 12px 40px}.side-search input{background:#fff;border-color:#c5d5ba;color:#314d2b;font-size:13px;padding:10px}.side-search input::placeholder{color:#6e8163}.side-progress{color:#6b7c5e;border-color:#d2ddc7;font:11px/1.7 system-ui,sans-serif}.side-group-title{color:#75856a;letter-spacing:0;font:11px/1.8 system-ui,sans-serif;padding-top:14px}.side-chapter-link{color:#3b5532;font-size:13px;padding:8px}.side-chapter-link:hover{background:#e1ead7}.side-chapter.active .side-chapter-link{color:#28603a}.side-sections li a{color:#607651;font-size:12px;line-height:1.8;padding:6px 8px}.side-sections li a:hover{background:#e2ebd9;color:#345f32}.side-sections li.active a{color:#245b32;background:#e0ebd5;border-color:#68925c}.side-sections .dot{border-color:#889e7c}.side-sections .dot.done{background:#749867;border-color:#749867}
.docs-main{padding:32px 38px 70px}.doc-crumbs{font-size:11px;color:#75886a;margin-bottom:24px}.doc-crumbs a{color:#58744c}.doc-crumbs b{color:#536c46}.doc-head{border-color:#d7e0cd;margin-bottom:30px;padding-bottom:24px}.doc-head .eyebrow{color:#647c57;font:12px/1.8 system-ui,sans-serif;letter-spacing:0}.doc-head h1{color:#263f2a;font-size:clamp(27px,3vw,38px);font-weight:650;letter-spacing:0}.doc-kicker{color:#69805b;font-size:14px}.doc-body{color:#3c5037;font-size:15.5px;line-height:1.95;overflow-wrap:anywhere}.doc-body h3{color:#29432b;font-size:21px;margin:44px 0 14px;line-height:1.7;scroll-margin-top:80px}.doc-body h4{color:#3b5532;font-size:16px;scroll-margin-top:80px}.doc-body strong,.doc-body b{color:#2c492d}.doc-body em{color:#7a5a24}.doc-body p{margin-bottom:18px}.doc-body code{background:#edf1e6;border-color:#d5dfca;color:#3c6032;font-size:13px}.doc-body a{color:#286b4d;text-underline-offset:3px}.doc-body summary{cursor:pointer;font-weight:600}
.note{background:#eaf1df;border-color:#71975c;color:#48613c;font-size:14px}.note.warn{background:#f3ecd6;border-color:#b99746;color:#715d28}.note.tip{background:#e6efe0;border-color:#6b9566;color:#44673e}.tbl{font-size:13px}.tbl th,.tbl td{border-color:#d2ddc7}.tbl th{background:#e7eddf;color:#3d5832}.tbl td{color:#4a603e}.tbl tr:nth-child(even) td{background:#f0f3e8}.steps li::before{border-color:#80a16d;color:#426b34}.flow>div{background:#edf2e5;border-color:#d0ddc2}.flow b{color:#406a35}.flow span{color:#5a714c;font-size:12px}.diagram{background:#112025}.code{background:#142226}.doc-body .code code{color:#d4e3d4;background:none;border:0}.doc-pager{border-color:#d4dfc9}.pager{background:#eef3e6;border-color:#d1dfc3}.pager small{color:#718665}.pager span{color:#3b5f31}.docs-foot{background:transparent;border:0;border-top:1px solid #d4dfc8;color:#718267;font-size:12px;padding:18px 0}.docs-foot strong{color:#536e46}.docs-toc{border-color:#d6dfce;padding:28px 12px}.toc-title{color:#6d815f;font:12px/1.8 system-ui,sans-serif;letter-spacing:0}.docs-toc a{font-size:12px;color:#617950}.docs-toc a:hover{color:#2e5e30;background:#e8f0df}
.course-intro{border-left:3px solid #789b62;padding:4px 0 4px 20px;margin-bottom:30px}.course-number{color:#5d8048;font-size:12px;font-weight:700;letter-spacing:1px}.course-intro p{font-size:18px;line-height:1.85;margin:9px 0 17px}.course-intro dl{margin:0}.course-intro dl>div{display:grid;grid-template-columns:85px 1fr;gap:12px;margin:6px 0;font-size:13px;line-height:1.85}.course-intro dt{color:#7d8e6e}.course-intro dd{margin:0;color:#536e43}.course-assumption{font-size:13px;color:#6c7e5c;border-top:1px solid #dae3cf;padding-top:14px}.lesson-source{font-size:13px;color:#6b7d5c;border-top:1px solid #d4e0c6;padding-top:18px}
.led-lesson{--text:#dfebe1;--muted:#9eaea5;--mint:#a8d4b3;background:#142329;color:#d4e1d7;border:1px solid #334b4a;border-radius:8px;overflow:hidden;margin:26px 0 34px;font-size:13px;line-height:1.8;box-shadow:0 5px 18px #1833270b}.lesson-instrument-head{padding:13px 20px;display:flex;gap:12px;flex-wrap:wrap;justify-content:space-between;background:#1b3035;color:#b4c7bc;border-bottom:1px solid #36504d;font-size:12px}.led-lesson .lesson-instrument-head strong{color:#c8d9a8}.lesson-workspace{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(230px,1fr)}.lesson-circuit{padding:16px;min-width:0}.lesson-circuit svg{width:100%;height:auto;display:block;color:#cfddd3;min-height:190px}.lesson-circuit svg text{fill:#c1d1c5;font-size:13px;font-family:inherit}.lesson-circuit .svg-label{fill:#859f94;font-size:12px}.wire,.gate{stroke:#7e9b92;stroke-width:2.6;fill:none}.wire.conducting,.gate.active{stroke:#e6b85c}.pad-dot{fill:#b5d2bc}.resistor{stroke:#a5bfa6;fill:#21362e;stroke-width:2}.led-symbol{stroke:#8b9d8c;fill:#2a3d36;stroke-width:2}.led-symbol.lit{fill:#f2ca6d;stroke:#f2ca6d}.pull-wire{fill:none;stroke:#8cafdc;stroke-width:2;stroke-dasharray:5 4}.flow-arrow{fill:none;stroke:#e6b85c;stroke-width:2}.lesson-circuit svg .current-note{fill:#c4b485;font-size:12px}.led-lesson p.lesson-observation{font-size:13px;color:#b9cdc0;min-height:68px;margin:0 0 16px;border-top:1px solid #314942;padding-top:12px}.lesson-evidence{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0}.lesson-evidence>div{border-top:1px solid #395046;padding-top:9px}.lesson-evidence dt{font-size:11px;color:#93ab9a}.lesson-evidence dd{margin:3px 0;color:#e4edd9;font-weight:600;font-size:15px}
.lesson-controls{padding:20px;background:#1b2e32;border-left:1px solid #36504a;min-width:0}.led-lesson h3{margin:0 0 12px;color:#e2ebdb;font-size:16px;line-height:1.7}.lesson-controls label{display:flex;flex-direction:column;gap:6px;font-size:12px;margin:12px 0;color:#bcd0c0}.lesson-controls select{width:100%;padding:9px 10px;background:#112226;color:#e3eddf;border:1px solid #526c5c;border-radius:4px;font:13px/1.6 system-ui,sans-serif;min-height:40px}.lesson-controls .lesson-check{display:flex;flex-direction:row;align-items:center;gap:9px}.lesson-check input{accent-color:#92c499;width:17px;height:17px}.led-lesson .lesson-control-note{font-size:11.5px;color:#a7bbae;line-height:1.8;margin:15px 0}.led-lesson button{background:#253d3b;color:#dfeadd;border:1px solid #617b65;border-radius:4px;font:13px/1.65 system-ui,sans-serif;padding:9px 12px;cursor:pointer;min-height:40px}.led-lesson button:hover{background:#35524a}.led-lesson button:focus-visible,.led-lesson select:focus-visible{outline:3px solid #efce82;outline-offset:3px}.led-lesson button:disabled{opacity:.45;cursor:not-allowed}.led-lesson .lesson-apply{width:100%;background:#bad9aa;color:#203b28;border-color:#bad9aa;font-weight:650}.lesson-feedback{background:#213c36;padding:14px 20px;color:#d8e7d6;border-top:1px solid #476354;min-height:55px}
.lesson-code{padding:18px 20px;background:#102026;border-top:1px solid #314a44}.lesson-code summary{color:#d1dec9}.lesson-code[open] summary{margin-bottom:14px}.led-lesson .lesson-code p{color:#9fb6a7;font-size:12px;margin:10px 0}.lesson-code pre{overflow:auto;background:#0c191e;padding:14px;border:1px solid #2b463c;border-radius:4px}.doc-body .lesson-code code{color:#c4ddbc;background:none;border:0;font:12px/1.85 Consolas,monospace;white-space:pre}.lesson-code dl>div{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.lesson-code dt{font:12px/1.8 Consolas,monospace;color:#a5c1b2}.lesson-code dd{margin:0;color:#dbe4c7}.lesson-faults{padding:23px 20px;border-top:1px solid #3c5246}.led-lesson .lesson-faults p{color:#afc2b3;font-size:12px;margin:10px 0}.lesson-fault-buttons,.lesson-diagnose{display:flex;flex-wrap:wrap;gap:9px}.lesson-fault-buttons button[aria-pressed=true]{background:#3d4c30;border-color:#c3ca87;color:#eef1cd}.lesson-diagnosis{border-left:2px solid #a6bd86;padding:8px 12px}.lesson-checks{padding:23px 20px;background:#1a302d;border-top:1px solid #3b5345}.lesson-checks ul{padding-left:0;list-style:none;font-size:13px;color:#c6d8be}.led-lesson .lesson-checks p{font-size:12px;color:#a1ba9b;margin:12px 0}.lesson-checks button{font-size:12px}
[data-widget]:not([data-widget="led-lesson"]){background:#122126;color:#bdcec2;padding:18px;border-radius:5px;--text:#d9e5d8;--muted:#9fb4a6;--mint:#abd6b4;overflow-x:auto}[data-widget]:not([data-widget="led-lesson"]) h3,[data-widget]:not([data-widget="led-lesson"]) h4,[data-widget]:not([data-widget="led-lesson"]) strong{color:#d9e5d8}[data-widget]:not([data-widget="led-lesson"]) code{background:#0c191d;border-color:#30443c;color:#cfdfc5}
@media(min-width:1450px){.docs-main{padding-left:50px;padding-right:50px}}@media(max-width:1240px){.docs-shell{grid-template-columns:225px minmax(0,1fr)}.docs-main{padding:28px}.lesson-workspace{grid-template-columns:1fr}.lesson-controls{border-left:0;border-top:1px solid #36504a;display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.lesson-controls h3,.lesson-controls .lesson-control-note,.lesson-controls button{grid-column:1/-1}}@media(max-width:900px){.docs-shell{grid-template-columns:1fr}.docs-side{background:#eff3e9f8;width:290px}.docs-main{padding:24px 20px 50px}.doc-body{font-size:15px}.docs-top{padding:0 15px;gap:11px}.docs-progress{margin-left:auto;font-size:10px}.docs-badge{font-size:11px}.doc-head h1{font-size:28px}}@media(max-width:480px){.lesson-controls{display:block;padding:17px}.lesson-circuit{padding:10px}.lesson-circuit svg{min-height:0}.lesson-evidence{gap:5px}.lesson-evidence dt{font-size:10px}.lesson-evidence dd{font-size:13px}.lesson-faults,.lesson-checks,.lesson-code,.lesson-feedback{padding:17px}.course-intro{padding-left:15px}.course-intro p{font-size:17px}.lesson-instrument-head{padding:11px 14px;font-size:11px}.docs-main{padding:22px 15px 45px}.docs-progress{border:0;padding:0}.tbl{display:block;overflow:auto;max-width:100%}.course-intro dl>div{grid-template-columns:70px 1fr;gap:8px}}