:root{color-scheme:dark;font-family:"Microsoft YaHei",system-ui,sans-serif;color:#edf6f6;background:#071c26}*{box-sizing:border-box}html,body,#app{margin:0;width:100%;height:100%;overflow:hidden}#stage{position:fixed;inset:0;width:100%;height:100vh;height:100dvh;overflow:hidden;background:#06151e}#view{display:block;width:100%;height:100%;touch-action:none;cursor:grab;outline-offset:-4px}button,select{font:inherit;color:inherit;cursor:pointer;border:1px solid #567b85;background:#123a46;border-radius:12px;min-height:44px;padding:10px 13px}button:hover{background:#205463}button:disabled{opacity:.5;cursor:default}button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid #9ff4d9;outline-offset:3px}button[aria-pressed=true]{background:#176e60;border-color:#9adbc6}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;clip-path:inset(50%);overflow:hidden;white-space:nowrap;border:0}
.menu-toggle{position:absolute;z-index:3;top:max(14px,env(safe-area-inset-top));right:max(14px,env(safe-area-inset-right));display:flex;align-items:center;gap:8px;padding:9px 13px;border:1px solid #ffffff72;border-radius:28px;background:#06212caa;box-shadow:0 2px 12px #0002;font-size:12px;backdrop-filter:blur(8px)}.menu-toggle svg{width:19px;height:19px;fill:currentColor}
.scene-links{position:absolute;left:50%;top:70%;transform:translate(-50%,-50%);display:flex;justify-content:center;gap:clamp(20px,4vw,65px);max-width:calc(100% - 24px);pointer-events:none;z-index:2}.scene-links button{pointer-events:auto;display:flex;align-items:center;flex-direction:column;gap:7px;flex-shrink:0;min-width:64px;max-width:100px;border:0;padding:5px 3px;background:none;border-radius:10px;font-size:12px;line-height:1.4;text-shadow:0 1px 5px #000,0 0 12px #000b}.scene-links button:hover{background:#08273340}.scene-links svg{width:40px;height:40px;stroke:white;stroke-width:2;fill:#09283350;filter:drop-shadow(0 2px 4px #0008)}.scene-links button:disabled{visibility:hidden}.scene-links:empty{display:none}
.gesture-hint{position:absolute;bottom:max(24px,calc(env(safe-area-inset-bottom) + 12px));left:50%;transform:translateX(-50%);white-space:nowrap;font-size:11px;letter-spacing:1px;color:white;text-shadow:0 1px 5px #000,0 0 10px #000;pointer-events:none;transition:opacity .4s}.gesture-hint.dismissed{opacity:0}#message{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);max-width:85%;padding:12px 18px;background:#062532e8;border:1px solid #8aa4ad88;border-radius:12px;text-align:center;font-size:13px}#message:empty{display:none}
dialog{position:fixed;inset:auto 0 0;margin:0 auto;border:1px solid #6a949d70;border-bottom:0;border-radius:24px 24px 0 0;width:min(100%,680px);max-width:100%;max-height:82vh;max-height:82dvh;overflow:auto;overscroll-behavior:contain;padding:24px 22px max(22px,env(safe-area-inset-bottom));background:#082530f7;color:#edf6f6;box-shadow:0 -12px 70px #0005}dialog::backdrop{background:#00101970;backdrop-filter:blur(3px)}.menu-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.eyebrow{font-size:11px;letter-spacing:2px;color:#9bc8bf}h1{font-size:23px;margin:6px 0}.menu-heading button{border:0;border-radius:50%;padding:0;width:44px;height:44px;background:#244651;font-size:28px;line-height:1}.location{font-size:12px;color:#a7c4c7;margin:16px 0 6px;display:flex;gap:6px;align-items:center;flex-wrap:wrap}.location strong{color:#e6f6ee;font-weight:400}.location span{margin-left:auto;font-size:11px}.scene-info{color:#8daeb4;font-size:11px;margin:0 0 16px}
#scenes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}#scenes button{font-size:12px;text-align:left;padding:12px 11px;line-height:1.5;min-height:48px;background:#123641;border-color:#395f69}#scenes button[aria-pressed=true]{border-color:#8ce3bd;background:#185447}.operations,.help{margin-top:20px;border-top:1px solid #36535e;padding-top:16px;font-size:12px;color:#bbd0d5}summary{cursor:pointer;min-height:28px;color:#d8ede6}.toolbar{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.toolbar button{font-size:12px;padding:8px 10px}.zoom-controls{display:flex;align-items:center;gap:8px;margin-top:12px}.zoom-controls button{min-width:44px}.zoom-controls output{font-size:13px;min-width:45px;text-align:center}.slider{display:flex;align-items:center;gap:9px;margin-top:15px;font-size:11px}.slider input{min-width:40px;flex:1;accent-color:#8de4bd}#heading{font-size:11px;color:#9fbbc1}.help{line-height:1.8}.help p{margin:10px 0}a{color:#9fe2ce}
.back-toggle{position:absolute;z-index:3;top:max(14px,env(safe-area-inset-top));left:max(14px,env(safe-area-inset-left));padding:9px 13px;border:1px solid #ffffff72;border-radius:28px;background:#06212caa;box-shadow:0 2px 12px #0002;font-size:12px;backdrop-filter:blur(8px)}.scene-links{flex-direction:column;align-items:center;gap:8px;width:max-content}.route-arrows{display:flex;justify-content:center;gap:clamp(20px,4vw,65px)}.route-pager{display:flex;align-items:center;gap:10px;color:white;font-size:10px;text-shadow:0 1px 5px #000}.scene-links .route-pager button{display:block;min-width:70px;max-width:none;min-height:36px;padding:8px 10px;border:1px solid #ffffff50;border-radius:22px;background:#08273388;font-size:10px}.scene-links .route-pager button:disabled{visibility:visible;opacity:.4;pointer-events:none}#scenes button[data-visited=true]::after{content:" ✓";color:#a7e6c6;font-size:11px}
#stage.split .scene-links,#stage.split .gesture-hint{display:none}#stage.split:after{content:"";position:absolute;left:50%;top:0;bottom:0;border-left:1px solid #9ad7dd80;pointer-events:none}#stage:fullscreen{border:0;width:100%;height:100%}@media(min-width:800px){dialog{inset:20px 20px 20px auto;margin:0;width:480px;max-height:calc(100dvh - 40px);border:1px solid #6a949d70;border-radius:22px}.scene-links{top:74%}}@media(max-height:500px){dialog{max-height:95dvh;padding:16px}#scenes{grid-template-columns:repeat(3,minmax(0,1fr))}.scene-links{top:76%}.gesture-hint{bottom:10px}}