@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Noto+Sans+SC:wght@400;500;600&family=Noto+Serif+SC:wght@500;600&display=swap");
:root{--bg:#07100f;--panel:#0b1716;--line:#2c4640;--ink:#f2f7f5;--muted:#a9bbb7;--mint:#79e0c2;--lime:#c8f56b;--cyan:#7cd6ed;--warm:#ffc878;--danger:#ff8580;--sans:"Noto Sans SC","Microsoft YaHei UI",sans-serif;--serif:"Noto Serif SC",serif;--mono:"IBM Plex Mono",Consolas,monospace}*{box-sizing:border-box}html{color-scheme:dark}body{margin:0;color:var(--ink);background:radial-gradient(circle at 78% 8%,rgba(124,214,237,.08),transparent 30rem),linear-gradient(rgba(121,224,194,.025) 1px,transparent 1px),var(--bg);background-size:auto,100% 48px,auto;font-family:var(--sans);font-size:16px}a{color:inherit;text-decoration:none}button,select{color:var(--ink);font:inherit;font-size:13px}
.site-header{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 clamp(22px,5vw,72px);border-bottom:1px solid var(--line);background:#07100fee}.brand,.site-header nav{display:flex;align-items:center;gap:22px}.brand{gap:12px;font:600 12px var(--mono)}.brand-mark{width:30px;height:30px;display:grid;place-items:center;border:1px solid var(--lime);border-radius:50%;color:var(--lime)}.site-header nav a{color:var(--muted);font-size:14px}.site-header nav a:hover{color:var(--lime)}main{width:min(1560px,calc(100% - 40px));margin:auto}.hero{min-height:315px;display:grid;grid-template-columns:1.3fr .7fr;align-items:end;gap:64px;padding:72px 0 46px}.eyebrow,.panel-label{color:var(--mint);font:600 12px var(--mono);letter-spacing:.1em}.hero h1{margin:16px 0 0;font:500 clamp(44px,6vw,80px)/1.16 var(--serif);letter-spacing:-.04em}.hero h1 em{color:var(--lime);font-style:normal}.hero p{margin:0;color:var(--muted);font-size:17px;line-height:1.9}
.lab{overflow:hidden;border:1px solid #42635b;border-radius:12px;background:#081311;box-shadow:0 34px 90px #0006}.lab-head{display:flex;justify-content:space-between;align-items:flex-end;padding:21px 26px;border-bottom:1px solid var(--line)}.lab-head h2{margin:6px 0 0;font:500 24px var(--serif)}.step-readout{display:flex;gap:14px;font:500 13px var(--mono)}.step-readout span{color:var(--lime)}.step-readout strong{color:var(--muted)}.case-tabs{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line)}.case-tab{min-height:58px;border:0;border-right:1px solid var(--line);background:#0a1514;color:var(--muted);cursor:pointer}.case-tab.is-active{color:var(--ink);background:#13241f;box-shadow:inset 0 -3px var(--lime)}
.lenses{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line)}.lenses article{padding:17px 20px;border-right:1px solid var(--line)}.lenses span{color:var(--mint);font:600 12px var(--mono)}.lenses p{margin:8px 0 0;color:#c4d3cf;font-size:13px;line-height:1.7}.lab-grid{display:grid;grid-template-columns:300px minmax(560px,1fr) 330px;min-height:690px}.explain,.visual,.inspect{min-width:0;padding:28px}.explain,.visual{border-right:1px solid var(--line)}.explain{display:flex;flex-direction:column}.phase{color:var(--mint);font:600 12px var(--mono)}.explain h2{margin:15px 0;font:500 34px/1.3 var(--serif)}.explain>p{margin:0;color:#d1ddda;line-height:1.85}.change,.why{margin-top:22px;padding:15px 16px;border-left:2px solid var(--cyan);background:#0d1d1b}.why{border-left-color:var(--lime)}.change span,.why span{color:var(--cyan);font:600 12px var(--mono)}.why span{color:var(--lime)}.change p,.why p{margin:8px 0 0;color:var(--muted);font-size:14px;line-height:1.7}.explain>a{margin-top:auto;padding-top:26px;color:var(--mint);font:500 13px var(--mono)}
.visual{background:radial-gradient(circle at 50% 20%,rgba(121,224,194,.07),transparent 24rem),#091513}.visual-head{display:flex;justify-content:space-between}.visual-head h2{margin:6px 0 0;font:500 25px var(--serif)}.visual-head>strong{color:var(--lime);font:600 14px var(--mono)}.comparison{display:grid;grid-template-columns:1fr auto 1fr 1fr;gap:10px;align-items:center;margin:24px 0}.comparison div{padding:13px;border:1px solid var(--line);border-radius:6px;background:#0c1a18}.comparison span{display:block;color:var(--muted);font-size:12px}.comparison strong{display:block;margin-top:7px;color:var(--lime);font:600 22px var(--mono)}.comparison i{color:var(--warm);font:600 13px var(--mono);font-style:normal}.window{display:grid;grid-template-columns:18px 1fr;gap:16px}.rail{position:relative;border:1px solid var(--line);border-radius:9px;background:#07100f}.rail span{position:absolute;left:2px;right:2px;top:0;height:14%;border-radius:7px;background:var(--mint);transition:.4s}.slots{display:grid;gap:7px}.slot{min-height:48px;display:grid;grid-template-columns:80px 1fr auto;align-items:center;gap:14px;padding:8px 13px;border:1px solid var(--line);border-radius:6px;background:#0c1a18}.slot b{color:var(--mint);font:500 12px var(--mono)}.slot span{font-size:14px}.slot small{color:var(--muted);font:12px var(--mono)}.slot.is-rebound{border-color:var(--lime);box-shadow:inset 3px 0 var(--lime)}.async-panel{margin-top:18px;padding:15px;border:1px solid var(--line);border-radius:7px;background:#08110f}.async-panel>span{color:var(--warm);font:600 12px var(--mono)}.async-panel ul{margin:10px 0 0;padding-left:22px;color:#cad7d3;font:12px/1.75 var(--mono)}
.inspect{display:flex;flex-direction:column;background:#091311}.inspect dl{display:grid;grid-template-columns:1fr auto;gap:11px 14px;margin:16px 0}.inspect dl div{display:contents}.inspect dt{color:var(--muted);font-size:13px}.inspect dd{margin:0;text-align:right;font:500 12px var(--mono)}.code{margin-top:auto;overflow:hidden;border:1px solid var(--line);border-radius:7px;background:#07100f}.code>div{display:flex;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--line);color:var(--muted);font:12px var(--mono)}.code>div strong{color:var(--mint)}#code-lines{margin:0;padding:13px 12px 13px 45px;font:12px/1.72 var(--mono);white-space:pre;overflow:auto}#code-lines li{padding:1px 7px;color:#93aaa4}#code-lines li.is-active{color:var(--ink);background:#16302a;box-shadow:inset 2px 0 var(--lime)}
.controls{display:grid;grid-template-columns:150px 1fr auto;align-items:end;gap:18px;padding:17px 22px;border-top:1px solid var(--line);background:#0b1715}.controls label{display:grid;gap:6px;color:var(--muted);font:500 12px var(--mono)}select{min-height:36px;padding:0 10px;border:1px solid #3c5651;border-radius:5px;background:#0d1c1a}.controls>div:nth-child(2){display:flex;justify-content:center;gap:7px;padding-bottom:12px}.lab-dot{width:10px;height:10px;padding:0;border:1px solid #547069;border-radius:50%;background:transparent}.lab-dot.is-past{background:#346b5c}.lab-dot.is-active{border-color:var(--lime);background:var(--lime)}.controls>div:last-child{display:flex;gap:8px}.controls button{min-height:42px;padding:0 15px;border:1px solid #45615b;border-radius:5px;background:#101f1d}.controls button:disabled{opacity:.36}.auto-button.is-playing{color:#07100f;background:var(--warm)}.next-button{color:#07100f!important;border-color:var(--lime)!important;background:var(--lime)!important;font-weight:600}button:focus-visible,select:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
@media(max-width:1180px){.lab-grid{grid-template-columns:280px 1fr}.inspect{grid-column:1/-1;border-top:1px solid var(--line);display:grid;grid-template-columns:.7fr 1.3fr}.code{margin-top:0}.lenses{grid-template-columns:repeat(2,1fr)}}@media(max-width:780px){main{width:calc(100% - 24px)}.site-header{padding:16px 18px}.site-header nav{flex-wrap:wrap}.hero{min-height:0;grid-template-columns:1fr;gap:22px;padding:50px 0 34px}.hero h1{font-size:clamp(38px,12vw,58px)}.case-tabs,.lenses{grid-template-columns:1fr}.lab-grid{display:block}.explain,.visual{border-right:0;border-bottom:1px solid var(--line)}.comparison{grid-template-columns:1fr 1fr}.comparison i{display:none}.inspect{display:flex}.controls{grid-template-columns:1fr}.controls>div:nth-child(2){order:-1}.controls>div:last-child{display:grid;grid-template-columns:1fr 1fr}}