:root{color-scheme:dark;--bg:#061713;--ink:#edf0dd;--muted:#9baea2;--gold:#d8c28b;--green:#9fcf91;font-family:'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:5px}button{transition:background .2s,color .2s,border-color .2s}button:disabled{opacity:.45;cursor:default}button:hover:not(:disabled){color:#fff}a{color:inherit;text-decoration:none}.experience{position:relative;min-height:800px;height:100svh;overflow:hidden;background:radial-gradient(ellipse at 65% 42%,#173b2b 0%,#0a211b 38%,#061713 76%)}#scene{position:absolute;inset:0}#scene canvas{display:block;width:100%;height:100%}.vignette{pointer-events:none;position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,20,16,.58),transparent 45%),linear-gradient(0deg,rgba(3,15,12,.8),transparent 30%)}.masthead{position:absolute;top:38px;left:4.2%;right:4.2%;display:flex;align-items:center;justify-content:space-between;z-index:2}.brand{display:flex;gap:14px;align-items:center;font-family:'Noto Serif SC',serif;font-size:22px;letter-spacing:4px}.brand-seal{display:grid;place-items:center;width:43px;height:47px;border:1px solid #a8ba9166;color:#d9d6ad;font-size:28px;letter-spacing:0;border-radius:50% 50% 2px 2px}.brand-en{display:block;font-family:Georgia,serif;font-size:10px;letter-spacing:3px;color:var(--muted);margin-top:5px}.header-right{display:flex;align-items:center;gap:28px}.demo-label{font-size:12px;color:#adbbab;letter-spacing:2px}.quiet-button{background:transparent;border:1px solid #a6b59c38;padding:10px 16px;font-size:13px;color:#bac5b6;border-radius:3px}.quiet-button span{margin-left:12px;font-size:17px}.quiet-button:hover{background:#b3c9a610}.story{position:absolute;top:24%;left:7%;width:350px;pointer-events:none}.eyebrow{font-size:12px;letter-spacing:2px;color:#b9c3a4;display:flex;align-items:center;gap:12px;white-space:nowrap}.eyebrow>span{width:24px;height:1px;background:var(--gold)}h1{font-family:'Noto Serif SC','Songti SC',serif;font-size:clamp(40px,4.2vw,68px);line-height:1.4;font-weight:400;letter-spacing:6px;margin:24px 0 20px}.title-stop{color:var(--gold)}.intro{font-size:14px;line-height:2;color:var(--muted);letter-spacing:2px}.attendance{margin-top:38px;max-width:280px}.stat-label{font-size:12px;letter-spacing:2px;color:#b9c4b5}.stat-line{display:flex;align-items:baseline;gap:12px;margin:8px 0 10px}.stat-line strong{font-family:Georgia,'Times New Roman',serif;font-weight:400;font-size:clamp(44px,4.5vw,72px);letter-spacing:1px;font-variant-numeric:tabular-nums;color:#eee8c9}.stat-line>span{font-size:13px;color:var(--muted)}.stat-bottom{display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.stat-bottom b{font-weight:400;color:#c4cebb}.progress-track{margin-top:13px;height:2px;background:#a2bf9e24}.progress-track>div{height:100%;width:34.5%;background:linear-gradient(90deg,#537d5e,#e5d59d);transition:width .25s}.chapter{display:flex;gap:16px;align-items:center;margin-top:35px}.chapter>span{font-family:Georgia,serif;font-size:33px;font-style:italic;color:#c9b98580;border-right:1px solid #b8c8aa35;padding-right:16px}.chapter strong{display:block;font-size:13px;font-weight:400;letter-spacing:3px;color:#d7d8b9}.chapter div>span{display:block;font-size:11px;color:var(--muted);margin-top:8px;letter-spacing:1px}.tree-caption{position:absolute;bottom:174px;left:46%;right:12%;display:flex;gap:25px;justify-content:center;align-items:center;color:#bdc6a3;font-family:'Noto Serif SC',serif;font-size:13px;letter-spacing:8px;pointer-events:none}.caption-line{height:1px;width:48px;background:linear-gradient(90deg,transparent,#aab88e70,transparent)}.notice{position:absolute;bottom:138px;left:45%;right:10%;text-align:center;color:#bccbad;font-size:12px;letter-spacing:1px;pointer-events:none;min-height:20px}.console{position:absolute;bottom:28px;left:4.2%;right:4.2%;display:flex;align-items:center;gap:32px;border-top:1px solid #a6c09526;padding-top:23px;z-index:3}.console-heading{min-width:134px}.console-title{display:block;font-size:14px;letter-spacing:2px}.console-note{display:block;font-size:11px;color:var(--muted);margin-top:8px}.timeline{flex:1;max-width:640px;margin:auto}.timeline input{width:100%;height:16px;accent-color:var(--gold);cursor:pointer;margin:0}.timeline-labels{display:flex;justify-content:space-between;margin-top:4px}.timeline-labels button{background:none;border:0;color:var(--muted);font-size:11px;padding:6px 0;min-width:32px}.timeline-labels button:hover{color:var(--gold)}.actions{display:flex;align-items:center;gap:8px;white-space:nowrap}.add-button{background:#cad9b308;border:1px solid #adc39936;padding:12px 16px;border-radius:3px;font-size:12px}.add-button:hover{background:#cad9b318}.play-button{background:#d7cd9e;color:#1b2c1e;border:1px solid #d7cd9e;padding:12px 20px;border-radius:3px;font-size:12px;display:flex;gap:10px;align-items:center}.play-button:hover:not(:disabled){background:#ece0b1;color:#11231b}.error-panel{position:absolute;left:45%;top:40%;max-width:420px;padding:28px;background:#142b22eF;border:1px solid #a0b69450;z-index:5}.error-panel p{font-size:14px;line-height:1.8;color:var(--muted)}.error-panel button{background:var(--gold);color:var(--bg);border:0;padding:10px 20px}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0)}.exit-present{position:absolute;right:30px;bottom:30px;z-index:6;opacity:.4}.exit-present:hover,.exit-present:focus{opacity:1}.immersive .console,.immersive .header-right,.immersive .notice{display:none}.immersive .tree-caption{bottom:55px}
@media(min-width:1700px){.story{top:23%;left:8%}.attendance{margin-top:45px}.console{bottom:38px}.tree-caption{bottom:180px}}
@media(max-width:1100px){.story{left:5%;width:310px}.console{gap:18px}.actions{gap:5px}.add-button{padding:12px}.play-button{padding:12px}.console-heading{min-width:108px}h1{font-size:45px}.attendance{max-width:245px}}
@media(max-width:700px){.experience{height:auto;min-height:960px}.masthead{top:22px;left:6%;right:6%}.brand{font-size:18px}.brand-seal{width:34px;height:39px;font-size:24px}.brand-en{font-size:9px}.header-right{gap:10px}.demo-label{font-size:10px;letter-spacing:0}.header-right .quiet-button{display:none}.story{top:120px;left:7%;width:86%}.eyebrow{font-size:10px;letter-spacing:1px}h1{font-size:40px;line-height:1.3;margin:20px 0 12px;letter-spacing:5px}h1 br{display:none}.intro{font-size:12px;line-height:1.9;letter-spacing:1px}.attendance{margin-top:20px;max-width:220px}.stat-line strong{font-size:44px}.chapter{position:absolute;right:0;top:161px;gap:10px;margin:0}.chapter>span{font-size:24px;padding-right:10px}.chapter strong{font-size:12px;letter-spacing:2px}.chapter div>span{font-size:10px;letter-spacing:0;max-width:100px;line-height:1.6}.tree-caption{left:0;right:0;bottom:230px}.notice{left:6%;right:6%;bottom:199px;font-size:11px}.console{left:6%;right:6%;bottom:23px;gap:14px;flex-wrap:wrap;padding-top:16px}.console-heading{display:flex;align-items:center;width:100%;justify-content:space-between}.console-note{margin:0}.timeline{order:2;flex-basis:100%;max-width:none}.actions{order:3;width:100%;gap:10px}.actions>button{flex:1;justify-content:center;padding:12px 8px}.timeline-labels button{padding:8px 0}.error-panel{left:7%;right:7%;top:50%;max-width:none}.immersive .experience{min-height:100svh}.immersive .tree-caption{bottom:70px}.exit-present{right:20px;bottom:20px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* Give the tree its own large stage; text and controls no longer shrink its camera. */
#scene{left:29%;right:1%;top:80px;bottom:155px}
.vignette{background:linear-gradient(90deg,rgba(5,20,16,.28),transparent 33%),linear-gradient(0deg,rgba(3,15,12,.22),transparent 18%)}
.tree-caption{bottom:135px;left:33%;right:4%}
.notice{bottom:107px;left:33%;right:4%}
.story{top:21%;width:28%;max-width:350px}
.immersive #scene{bottom:80px}
@media(max-width:1100px) and (min-width:901px){.story{left:4%;width:28%}h1{font-size:38px;letter-spacing:4px}.eyebrow{font-size:10px;letter-spacing:0}.attendance{max-width:225px}}
@media(max-width:900px){
  .experience{height:100svh;min-height:740px}
  .masthead{top:20px;left:6%;right:6%}
  .brand{font-size:18px}.brand-seal{width:34px;height:39px;font-size:24px}.brand-en{font-size:9px}
  .header-right .quiet-button{display:none}.demo-label{font-size:11px;letter-spacing:0}
  .story{top:91px;left:6%;width:88%;max-width:none;display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .eyebrow,.intro{display:none}
  h1{margin:0;font-size:31px;line-height:1.4;letter-spacing:4px}h1 br{display:block}
  .attendance{margin:0;max-width:205px;width:100%;justify-self:end;align-self:start}
  .stat-label{font-size:11px;letter-spacing:1px}.stat-line{margin:4px 0 6px}.stat-line strong{font-size:44px}.stat-bottom{font-size:11px}.progress-track{margin-top:9px}
  .chapter{position:absolute;top:101px;left:0;right:auto;margin:0;gap:10px}
  .chapter>span{font-size:18px;padding-right:10px}.chapter strong{font-size:11px;letter-spacing:2px}.chapter div>span{display:none}
  #scene{left:0;right:0;top:200px;bottom:179px}
  .tree-caption{left:0;right:0;bottom:169px;font-size:11px;gap:16px;letter-spacing:5px}
  .notice{display:none}
  .console{left:6%;right:6%;bottom:18px;gap:10px;flex-wrap:wrap;padding-top:12px}
  .console-heading{display:flex;align-items:center;justify-content:space-between;width:100%}
  .console-title{font-size:12px}.console-note{margin:0;font-size:11px}
  .timeline{order:2;flex-basis:100%;max-width:none}.timeline-labels{margin-top:0}.timeline-labels button{padding:6px 0;font-size:11px}
  .actions{order:3;width:100%;gap:10px}.actions>button{flex:1;justify-content:center;padding:11px 8px}
  .immersive #scene{top:205px;bottom:70px}.immersive .tree-caption{bottom:46px}
}
@media(max-width:480px){h1{font-size:26px;letter-spacing:2px}.stat-line strong{font-size:37px}.stat-label{font-size:10px;letter-spacing:0}.stat-bottom{font-size:10px}.story{gap:12px}.attendance{max-width:165px}.chapter{top:88px}#scene{top:186px}}