:root{color-scheme:dark;--bg:#080b10;--panel:#10151d;--line:#242c37;--text:#ecf1f5;--muted:#85909e;--lime:#c3fa6b;--cyan:#64deef}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px 'Microsoft YaHei',sans-serif}body:before{content:'';position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 80% 0%,#233b3733,transparent 55%);z-index:-1}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}a:focus-visible,button:focus-visible{outline:2px solid var(--lime);outline-offset:5px}header{height:88px;margin:0 5%;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:40px}.logo{font-size:19px;letter-spacing:1px;display:flex;align-items:center;gap:12px}.logo b{font-size:30px;color:var(--lime)}.logo span{font-size:9px;letter-spacing:2px;color:var(--muted);margin-left:10px}.nav-collection{margin-left:auto;font-size:12px}.online{color:var(--muted);font:10px monospace;letter-spacing:1px}i{display:inline-block;background:var(--lime);width:6px;height:6px;border-radius:50%;margin-right:8px;box-shadow:0 0 12px #c3fa6b88}main{max-width:1440px;margin:auto;padding:0 5%}.hero{position:relative;min-height:570px;padding:78px 0 45px;display:grid;grid-template-columns:1.1fr 1fr;gap:30px;align-items:center}.eyebrow{font:10px monospace;letter-spacing:2px;color:var(--lime);margin:0 0 25px}.hero h1{font-size:clamp(48px,5.6vw,82px);font-weight:500;letter-spacing:-2px;line-height:1.2;margin:0 0 30px}.hero h1 em{font-style:normal;color:var(--lime)}.hero p{color:var(--muted);font-size:13px;line-height:2}.primary{display:inline-flex;background:var(--lime);color:#12200d;padding:15px 22px;font-weight:600;font-size:12px;gap:40px;border:0;border-radius:4px;margin-top:23px}.hero-art{position:relative;min-width:0;background:linear-gradient(160deg,#16211c66,#0c1118);border:1px solid #314137;border-radius:8px;padding:24px;transform:perspective(1000px) rotateY(-5deg);box-shadow:0 30px 100px #0007}.art-head,.art-foot{font:9px monospace;color:var(--muted);display:flex;justify-content:space-between;letter-spacing:1px}.hero-art h3{font-weight:400;font-size:18px;margin:28px 0 0}.art-foot{border-top:1px solid var(--line);padding-top:18px}.hero-art canvas{height:255px!important}.orbit{position:absolute;width:65px;height:65px;border:1px solid #c3fa6b55;border-radius:50%;right:0;top:-22px;display:grid;place-items:center;color:var(--lime);background:#101910;font:25px monospace}.summary{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;gap:70px;padding:25px 0}.summary div{display:flex;align-items:center;gap:16px}.summary strong{font:34px monospace;font-weight:400}.summary span{color:var(--muted);font-size:11px}.summary p{margin-left:auto;color:var(--muted);font:10px monospace;line-height:1.6;letter-spacing:2px}.section-head{display:flex;align-items:end;justify-content:space-between;margin:65px 0 28px}.section-head h2{font-size:30px;font-weight:400;margin:0}.section-head p:last-child{color:var(--muted);font-size:12px;line-height:1.8}.section-head .eyebrow{margin-bottom:13px}.chapter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding-bottom:65px}.chapter-card{position:relative;display:block;border:1px solid var(--line);border-radius:6px;padding:27px 30px;background:linear-gradient(130deg,#141b22,#0c1016);overflow:hidden;transition:border-color .3s,transform .3s}.chapter-card:hover{border-color:#94bd55;transform:translateY(-4px)}.card-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font:10px monospace;letter-spacing:1px}.chapter-card .number{font:60px monospace;color:var(--lime);letter-spacing:-5px}.chapter-card h3{font-size:23px;font-weight:400;margin:21px 0 12px}.chapter-card p{font-size:12px;color:var(--muted);line-height:1.9;margin:0;max-width:78%}.card-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:20px;margin-top:28px;font-size:11px}.card-bottom b{font-size:20px;font-weight:400;color:var(--lime)}.card-spark{position:absolute;right:22px;top:90px;width:110px;height:65px;opacity:.45}.card-spark span{display:inline-block;background:var(--lime);width:9px;margin:0 3px;height:100%;transform-origin:bottom;animation:bar 1.3s ease both}.chapter-card:nth-child(even) .card-spark span{background:var(--cyan)}.chapter-heading{padding:38px 0 28px;border-bottom:1px solid var(--line)}.back{font-size:12px;color:var(--muted)}.heading-row{display:flex;justify-content:space-between;align-items:center;margin-top:30px;gap:20px}.heading-row h1{font-weight:400;font-size:32px;margin:0 0 12px}.heading-row p{color:var(--muted);font-size:12px;margin:0}.outline{background:transparent;border:1px solid #38444f;border-radius:4px;padding:11px 15px;font-size:11px;white-space:nowrap}.workspace{display:grid;grid-template-columns:215px minmax(0,1fr);gap:30px;padding:30px 0 55px;min-height:680px}.work-nav{border-right:1px solid var(--line);padding-right:20px}.work-nav>p{color:var(--muted);font:10px monospace;letter-spacing:1px;margin:0 0 20px}.work-nav button{width:100%;display:flex;gap:12px;text-align:left;padding:13px 10px;line-height:1.6;background:none;border:1px solid transparent;border-radius:4px;margin-bottom:6px;font-size:12px;color:var(--muted)}.work-nav button small{font:10px monospace;padding-top:3px}.work-nav button.active{color:var(--lime);background:#c3fa6b0a;border-color:#c3fa6b33}.work-nav button:hover{background:#ffffff06;color:white}.work-area{min-width:0}.work-title{display:flex;justify-content:space-between;align-items:center;margin:0 0 22px;gap:15px}.work-title h2{font-size:21px;font-weight:400;margin:8px 0 0}.work-title .eyebrow{font-size:9px;margin:0}.stage{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:16px;align-items:stretch}.viz-panel,.code-panel{background:#0d121a;border:1px solid var(--line);border-radius:5px;overflow:hidden;min-width:0}.panel-head{height:46px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 17px;font:10px monospace;color:var(--muted);letter-spacing:1px}.panel-head span:first-child{color:var(--lime)}.code-panel .panel-head span:first-child{color:var(--cyan)}.panel-head button{background:none;border:0;color:var(--muted);font-size:10px}.canvas-wrap{padding:10px;position:relative}.canvas-wrap canvas{width:100%;height:400px;display:block}.chart-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;padding:0 15px 18px;font-size:10px;color:var(--muted);min-height:29px}.chart-legend b{width:7px;height:7px;display:inline-block;margin-right:5px;border-radius:2px}.chart-note{color:var(--muted);font-size:10px;line-height:1.8;margin:14px 0}.code-panel pre{margin:0;padding:17px 13px;font:11px/1.9 Consolas,monospace;overflow:auto;height:440px;tab-size:4;white-space:pre}.code-line{display:block}.line-no{display:inline-block;color:#455261;width:30px;user-select:none;position:sticky;left:-13px;background:#0d121a}.tok-string{color:#b8e982}.tok-comment{color:#596e78}.tok-keyword{color:#b9a1ff}.tok-number{color:#f2be77}.work-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:23px;color:var(--muted);font-size:11px}.work-bottom button:disabled{opacity:.3;cursor:default}.next-chapters{display:flex;gap:8px;margin-top:40px;padding-top:22px;border-top:1px solid var(--line);flex-wrap:wrap}.next-chapters a{font-size:10px;padding:8px 14px;border:1px solid var(--line);border-radius:3px;color:var(--muted)}.next-chapters a.active{color:var(--lime);border-color:#c3fa6b55}.tooltip{position:absolute;pointer-events:none;z-index:3;background:#171f2aee;border:1px solid #556779;color:white;border-radius:4px;padding:9px 12px;font-size:11px;line-height:1.7;max-width:220px;box-shadow:0 8px 30px #0008}.tooltip[hidden]{display:none}footer{margin:0 5%;border-top:1px solid var(--line);padding:25px 0;display:flex;justify-content:space-between;font:10px monospace;color:var(--muted)}.enter{animation:enter .5s ease both}@keyframes enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@keyframes bar{from{transform:scaleY(.02)}to{transform:scaleY(1)}}@media(min-width:1500px){.canvas-wrap canvas{height:460px}.code-panel pre{height:500px}}@media(max-width:1100px){.stage{grid-template-columns:1fr}.canvas-wrap canvas{height:350px}.code-panel pre{height:320px}.workspace{grid-template-columns:185px minmax(0,1fr)}.hero h1{font-size:58px}}@media(max-width:700px){header{height:72px;gap:15px}.logo span,.online{display:none}.logo{font-size:17px}.hero{grid-template-columns:1fr;padding-top:45px;gap:35px}.hero h1{font-size:51px}.hero-art{transform:none}.summary{gap:0;justify-content:space-between;margin-top:25px}.summary div{display:block}.summary strong{display:block;font-size:29px;margin-bottom:8px}.summary p{display:none}.section-head{margin-top:45px}.section-head p:last-child{display:none}.chapter-grid{grid-template-columns:1fr}.chapter-card{padding:25px}.heading-row{display:block}.heading-row h1{font-size:26px}.heading-row .outline{display:inline-block;margin-top:20px}.workspace{display:block;padding-top:20px}.work-nav{display:flex;overflow-x:auto;gap:6px;border-right:0;border-bottom:1px solid var(--line);padding:0 0 12px;margin-bottom:24px}.work-nav>p{display:none}.work-nav button{width:auto;flex-shrink:0;white-space:nowrap;padding:9px;font-size:11px}.work-title h2{font-size:19px}.canvas-wrap canvas{height:340px}.work-title>.outline{font-size:10px;padding:9px}.work-bottom{font-size:10px}.work-bottom .outline{padding:9px;font-size:10px}footer{font-size:9px}footer>span:nth-child(2){display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}