/* Learning Lab: all component styles are scoped; original theme settings survive. */
.lab-hero{--lab-bg:#0c1010;--lab-fg:#f0f2ec;--lab-muted:#9ca7a3;--lab-accent:#b6f4d0;--lab-line:rgba(215,241,230,.16);box-sizing:border-box;background:var(--lab-bg);color:var(--lab-fg);font-family:Arial,"Microsoft YaHei",sans-serif;position:relative;isolation:isolate;overflow:hidden;text-align:left;width:100%;padding:0 clamp(24px,5vw,88px)}
.lab-hero *{box-sizing:border-box}.lab-hero a{color:inherit;text-decoration:none}.lab-hero a:hover{color:var(--lab-accent)}.lab-hero button,.lab-hero a{touch-action:manipulation}.lab-hero :is(a,button,canvas):focus-visible{outline:2px solid var(--lab-accent);outline-offset:6px}
.lab-hero__top{max-width:1440px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:96px;border-bottom:1px solid var(--lab-line)}
.lab-hero__brand{display:flex;align-items:center;gap:13px;font-size:15px;font-weight:600;letter-spacing:-.2px}.lab-hero__mark{font-size:38px;line-height:1;font-weight:800;letter-spacing:-5px;padding-right:6px}.lab-hero__mark span{color:var(--lab-accent)}
.lab-hero__edition,.lab-hero__index,.lab-hero__eyebrow,.lab-hero__interests,.lab-hero__coordinate,.lab-hero__caption,.lab-hero__bottom{font-family:"Courier New",monospace;font-size:10px;letter-spacing:1.3px;line-height:1.5}.lab-hero__edition{color:var(--lab-muted)}.lab-hero__index{font-family:inherit;letter-spacing:0;font-size:13px}.lab-hero__index span{margin-left:20px}
.lab-hero__body{max-width:1440px;min-height:650px;margin:0 auto;display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:20px}
.lab-hero__copy{padding:68px 0 56px;position:relative;z-index:2}.lab-hero__eyebrow{color:var(--lab-accent);margin:0 0 34px;display:flex;align-items:center;gap:10px}.lab-hero__eyebrow>span{width:6px;height:6px;border-radius:50%;background:var(--lab-accent)}
.lab-hero #lab-title{font-family:Arial,"Microsoft YaHei",sans-serif!important;font-size:clamp(48px,5.7vw,88px)!important;font-weight:500!important;line-height:1.06!important;letter-spacing:-.055em!important;color:var(--lab-fg)!important;margin:0 0 28px!important;text-transform:none!important;overflow-wrap:anywhere}
.lab-hero__description{max-width:410px;font-size:14px;line-height:2.05;color:var(--lab-muted);margin:0 0 32px;letter-spacing:.5px}.lab-hero__actions{display:flex;align-items:center;gap:27px;flex-wrap:wrap}.lab-hero__primary{background:var(--lab-accent);color:#10261b!important;border-radius:4px;padding:16px 23px;display:inline-flex;align-items:center;gap:30px;font-size:13px;font-weight:600;transition:background .2s,transform .2s}.lab-hero__primary:hover{background:#d8ffe6;transform:translateY(-2px)}.lab-hero__secondary{font-size:13px}.lab-hero__secondary span{margin-left:18px}.lab-hero__interests{display:flex;flex-wrap:wrap;gap:16px;font-size:8px;letter-spacing:.8px;color:#9aa9a1;margin-top:58px}.lab-hero__interests span+span::before{content:"/";margin-right:16px;color:#50665b}
.lab-hero__visual{height:550px;position:relative;min-width:0;background:radial-gradient(ellipse at 50% 50%,rgba(112,179,146,.09),transparent 68%)}.lab-hero__visual::before{content:"";position:absolute;inset:60px 0 95px;background-image:radial-gradient(#749783 1px,transparent 1px);background-size:24px 24px;opacity:.12;mask-image:radial-gradient(ellipse,#000,transparent 70%);pointer-events:none}.lab-hero__orbit{position:absolute;width:390px;max-width:90%;aspect-ratio:1;border:1px solid var(--lab-line);border-radius:50%;left:50%;top:45%;transform:translate(-50%,-50%);pointer-events:none}.lab-hero__orbit::before,.lab-hero__orbit::after{content:"";position:absolute;border:1px solid rgba(190,234,210,.07);border-radius:50%;inset:-22px}.lab-hero__orbit::after{inset:28px;transform:rotate(-25deg) scaleX(.55)}.lab-hero__coordinate{position:absolute;top:18px;left:16px;color:#9fb2a7;font-size:9px}.lab-hero__stage{position:absolute;inset:25px 0 66px;z-index:1}.lab-hero__stage canvas{display:block;width:100%;height:100%;cursor:grab;touch-action:pan-y}.lab-hero__stage canvas:active{cursor:grabbing}.lab-hero__poster{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;transition:opacity .4s}.lab-hero.is-ready .lab-hero__poster{opacity:0;pointer-events:none}
.lab-hero__caption{position:absolute;left:30px;right:30px;bottom:81px;display:flex;align-items:center;gap:9px;font-size:9px;pointer-events:none;z-index:2}.lab-hero__version{margin-left:auto;color:var(--lab-muted)}.lab-hero__live-dot{width:5px;height:5px;background:#b6f4d0;border-radius:50%}.lab-hero__controls{position:absolute;bottom:30px;left:0;right:0;display:flex;justify-content:center;gap:6px;z-index:3}.lab-hero__controls[hidden],.lab-hero__load[hidden]{display:none}.lab-hero__controls button,.lab-hero__load{font:11px Arial,"Microsoft YaHei",sans-serif;color:#c4d4cb;border:1px solid #34413b;background:#141d18;border-radius:4px;padding:8px 12px;cursor:pointer;box-shadow:none}.lab-hero__controls button:hover,.lab-hero__load:hover{background:#25392d;color:#effcf5}.lab-hero__load{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:3;white-space:nowrap}.lab-hero__status{position:absolute;bottom:0;left:0;right:0;text-align:center;color:#95a49b;font-size:10px;margin:0;line-height:1.5}.lab-hero__bottom{max-width:1440px;margin:auto;border-top:1px solid var(--lab-line);min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#97a59e;font-size:9px}.lab-hero__bottom a{font:12px Arial,sans-serif;color:#dae5de}.lab-hero__bottom a span{margin-left:18px}.lab-hero__bottom i{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--lab-accent);margin-left:8px}
/* Optional homepage polish, with no layout/query/visibility changes. */
.pnb-lab-polish{background:#f5f6f2}.pnb-lab-polish #main_header{width:100%;max-width:none}.pnb-lab-polish #main_nav{background:#f5f6f2;border-bottom:1px solid #dce2da}.pnb-lab-polish #main_nav a{font-family:Arial,"Microsoft YaHei",sans-serif;letter-spacing:.2px}.pnb-lab-polish .site-content :is(.entry-title,.post-title,.widget-title){font-family:Arial,"Microsoft YaHei",sans-serif;letter-spacing:-.035em}.pnb-lab-polish .site-content .img-holder{border-radius:6px;overflow:hidden}.pnb-lab-polish .site-content a:focus-visible{outline:2px solid #26674a;outline-offset:4px}
.pnb-lab-polish #main_header>.navbar-expand-lg{background:#f5f6f2}.pnb-lab-polish #main_nav{margin-top:0!important;padding-top:18px;padding-bottom:18px}
.pnb-lab-polish .site-content .btn,.pnb-lab-polish .site-content .page-numbers{border-radius:4px}.pnb-lab-polish .site-content a.btn,.pnb-lab-polish .site-content .next.page-numbers{background:#dcece0;color:#183c2a}.pnb-lab-polish .site-footer{background:#eaf0e9;border-top:1px solid #d5ded3}.pnb-lab-polish .site-footer .site-title a{font-family:Arial,"Microsoft YaHei",sans-serif!important;font-size:24px!important;font-weight:600;letter-spacing:-.04em;color:#183c2a!important}.pnb-lab-polish .navbar-toggler{color:#183c2a}
@media(min-width:1600px){.lab-hero__body{min-height:720px}.lab-hero__visual{height:610px}}
@media(max-width:1000px){.lab-hero{padding:0 30px}.lab-hero__edition{display:none}.lab-hero__body{min-height:580px;grid-template-columns:1fr 1fr;gap:0}.lab-hero__visual{height:490px}.lab-hero #lab-title{font-size:clamp(42px,6vw,62px)!important}.lab-hero__interests{gap:10px;margin-top:36px}.lab-hero__interests span+span::before{display:none}.lab-hero__bottom>span:first-child{display:none}}
@media(max-width:680px){.lab-hero{padding:0 22px}.lab-hero__top{min-height:77px;gap:12px}.lab-hero__brand{font-size:12px;gap:9px}.lab-hero__mark{font-size:33px}.lab-hero__index{font-size:11px;white-space:nowrap}.lab-hero__index span{margin-left:7px}.lab-hero__body{display:flex;flex-direction:column;min-height:0}.lab-hero__copy{padding:44px 0 12px;width:100%}.lab-hero__eyebrow{font-size:8px;letter-spacing:1.1px;margin-bottom:24px}.lab-hero #lab-title{font-size:clamp(40px,9.3vw,62px)!important;line-height:1.07!important;margin-bottom:22px!important}.lab-hero__description{font-size:12px;max-width:340px;margin-bottom:23px}.lab-hero__primary{padding:14px 19px;font-size:12px}.lab-hero__interests{font-size:7px;gap:12px;margin-top:28px}.lab-hero__visual{width:100%;height:420px;margin:12px 0 18px}.lab-hero__coordinate{top:12px;left:4px;font-size:8px}.lab-hero__orbit{width:285px}.lab-hero__stage{inset:20px -10px 66px}.lab-hero__caption{left:10px;right:10px;bottom:75px;font-size:8px}.lab-hero__bottom{min-height:60px;font-size:7px;letter-spacing:.7px}.lab-hero__bottom a{font-size:11px}}
@media(prefers-reduced-motion:reduce){.lab-hero *{animation:none!important;transition:none!important;scroll-behavior:auto!important}}