:root{color-scheme:light;--paper:#f3f2ed;--ink:#23352f;--muted:#65736b;--line:#d8ddd6;--accent:#3d6657;--font:Inter,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:14px var(--font);height:100dvh;display:flex;flex-direction:column;min-height:540px}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid var(--accent);outline-offset:4px}button[hidden],[hidden]{display:none!important}
.page-header{height:96px;display:flex;align-items:center;justify-content:space-between;padding:0 4vw;gap:24px;flex:none}.identity{display:flex;align-items:center;gap:13px;font-weight:650;letter-spacing:2px}.identity svg{width:32px;height:32px;fill:none;stroke:currentColor;stroke-width:1.25}.identity-sub{font-weight:400;color:var(--muted);margin-left:14px;letter-spacing:3px}.page-header nav{display:flex;gap:6px;border:1px solid var(--line);padding:4px;border-radius:40px}.page-header nav a{min-height:44px;display:flex;align-items:center;padding:0 22px;border-radius:30px;font-size:13px;color:var(--muted)}.page-header nav a[aria-current=page]{background:var(--ink);color:var(--paper)}.edition,.overline,footer{font-size:10px;letter-spacing:1.7px;color:var(--muted)}.edition{font-family:monospace}
main{flex:1;min-height:0;padding:0 3vw}.tour-viewport{position:relative;isolation:isolate;height:100%;overflow:hidden;background:#e6e7e2;border:1px solid var(--line);border-radius:6px}#scene{width:100%;height:100%;display:block;touch-action:none;cursor:grab;outline-offset:-5px}#scene:active{cursor:grabbing}.tour-meta{position:absolute;top:32px;left:36px;pointer-events:none}.tour-meta h1{font-size:25px;font-weight:500;letter-spacing:1px;margin:12px 0}.tour-meta #beijing-clock{font-size:11px;letter-spacing:1px;color:var(--muted);font-variant-numeric:tabular-nums}.tour-toolbar{position:absolute;bottom:28px;right:28px;display:flex;gap:8px}.tour-toolbar button{width:46px;height:46px;border-radius:50%;border:1px solid #ccd3ca;background:#f3f2edf2;display:grid;place-items:center;transition:background .15s}.tour-toolbar button:hover{background:white}.tour-toolbar svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.tour-selection{position:absolute;bottom:42px;left:36px;font-size:12px;max-width:55%;pointer-events:none}.tour-selection:empty{display:none}footer{height:58px;display:flex;align-items:center;justify-content:space-between;padding:0 4vw;letter-spacing:1px;flex:none}footer .separator{margin:0 16px;color:#a1aaa3}
.tour-loading{position:absolute;inset:0;display:grid;place-items:center;background:var(--paper);z-index:5;padding:20px;overflow:auto}.load-card{width:min(360px,100%)}.load-card h2{font-size:23px;font-weight:500;margin:14px 0 24px}.load-numbers{display:flex;justify-content:space-between;font-size:12px;margin-bottom:10px}.load-numbers strong{font:500 13px monospace}progress{display:block;appearance:none;width:100%;height:5px;border:0;background:var(--line);accent-color:var(--accent);border-radius:3px;overflow:hidden}progress::-webkit-progress-bar{background:var(--line)}progress::-webkit-progress-value{background:var(--accent)}progress::-moz-progress-bar{background:var(--accent)}#load-detail{font-size:12px;color:var(--muted);min-height:20px;line-height:1.7;font-variant-numeric:tabular-nums;margin:12px 0 20px}.load-steps{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.load-steps li{display:flex;justify-content:space-between;font-size:12px;padding:8px 0;color:var(--muted)}.load-steps li span{font-size:11px}.load-steps li[data-state=active]{color:var(--ink);font-weight:600}.load-steps li[data-state=done] span{color:var(--accent)}#retry{background:var(--ink);color:var(--paper);padding:12px 20px;border:0;border-radius:6px;margin-top:16px;min-height:44px}
.tour-capture{position:absolute;right:28px;bottom:86px;background:var(--paper);padding:18px;border-radius:6px;font-size:12px;min-width:180px}.tour-capture progress{margin-top:12px}#chaos-label{position:absolute;right:30px;top:35px;font:10px monospace;letter-spacing:2px}#flash{position:absolute;inset:0;opacity:0;background:white;pointer-events:none}.evidence #flash{animation:flash .45s ease-out}@keyframes flash{from{opacity:.6}to{opacity:0}}.capturing .tour-meta,.capturing .tour-toolbar,.capturing .tour-selection,.capturing #chaos-label{visibility:hidden}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.sr-only:focus-within#object-access{clip:auto;left:20px;bottom:90px;width:220px;height:auto;max-height:180px;overflow:auto;background:var(--paper);padding:8px;border-radius:6px;z-index:6}.sr-only button{display:block;width:100%;min-height:44px;border:0;background:transparent;text-align:left}.skip-link{position:absolute;top:-100px;z-index:10;background:var(--paper);padding:12px}.skip-link:focus{top:0}
@media(max-width:700px){body{min-height:640px}.page-header{height:124px;flex-wrap:wrap;padding:18px 20px 14px;gap:14px}.identity{font-size:12px}.identity svg{width:27px;height:27px}.edition{font-size:9px}.page-header nav{order:3;width:100%;justify-content:center}.page-header nav a{flex:1;justify-content:center;padding:0 10px}main{padding:0 12px}.tour-meta{top:23px;left:22px}.tour-meta h1{font-size:21px}.tour-meta .overline{font-size:9px;letter-spacing:1px}.tour-toolbar{right:16px;bottom:18px}.tour-selection{left:22px;bottom:35px;max-width:50%}footer{height:58px;padding:0 20px;font-size:9px}footer>span:last-child{display:none}footer .separator{margin:0 10px}.load-card h2{font-size:21px;margin-bottom:16px}.load-steps li{padding:6px 0}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}#flash{display:none}}

.touch-hint{display:none}@media(max-width:700px){.desktop-hint{display:none}.touch-hint{display:inline}}

.tour-meta .overline,.tour-meta #beijing-clock{color:#405047}