@charset "UTF-8";
:root{color-scheme:dark;--bg:#0b141d;--panel:#101e29;--line:#ffffff17;--muted:#8d9ea9;--text:#eef5f7;--accent:#8de3d4;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);overflow:hidden}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button{border:0}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button:disabled{opacity:.45;cursor:wait}a{color:inherit;text-decoration:none}button:hover{color:var(--accent)}.masthead{height:90px;margin:0 40px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);position:relative;z-index:5}.brand{display:flex;align-items:center;gap:16px;letter-spacing:.15em;font-weight:600;font-size:18px}.brand-icon{font-size:29px;font-weight:300;display:grid;place-items:center;width:45px;height:45px;border:1px solid #69828f;border-radius:50%;color:var(--accent);transform:rotate(-10deg)}.brand small{display:block;font:10px/2.2 "Segoe UI",sans-serif;letter-spacing:.18em;color:var(--muted)}.mast-right{display:flex;align-items:center;gap:42px}.coordinates{font:12px monospace;color:var(--muted);letter-spacing:.06em}.text-button{background:none;padding:12px 0;font-size:14px}.text-button span{margin-left:14px;color:var(--accent)}main{position:relative;height:calc(100dvh - 138px);min-height:610px}.intro{position:absolute;top:52px;left:42px;width:250px;z-index:3;pointer-events:none}.intro button{pointer-events:auto}.eyebrow{font-size:11px;letter-spacing:.14em;color:var(--accent);display:flex;align-items:center;gap:10px}.line{width:26px;height:1px;background:var(--accent)}h1{font-size:62px;letter-spacing:.02em;font-weight:500;margin:22px 0 0;line-height:1.2}h1 span{display:block;font-size:29px;line-height:1.65;font-weight:300;margin-top:21px;letter-spacing:.08em}.intro-text{font-size:14px;color:var(--muted);line-height:1.9;margin:20px 0 26px}.summary{display:flex;gap:21px}.summary strong{font-size:23px;font-weight:400;font-variant-numeric:tabular-nums}.summary strong small{font-size:12px;margin-left:3px}.summary span{display:block;font-size:11px;color:var(--muted);margin-top:7px}.intro-rule{width:32px;height:1px;background:#718895;margin-top:30px}.edition{font-size:10px;color:#91a5b2;letter-spacing:.14em;line-height:1.9;margin-top:16px}.edition span{font-size:12px;letter-spacing:.04em;color:#647e8c}.primary-button{display:flex;justify-content:space-between;align-items:center;gap:45px;background:var(--accent);color:#0e292a;padding:13px 18px;font-size:14px;border-radius:2px;margin-top:20px}.primary-button:hover{background:#baf9ee;color:#0b2423}.stage{position:absolute;inset:0 0 105px 245px;overflow:hidden}.stage:after{content:"";position:absolute;inset:0;box-shadow:inset 80px 0 90px -55px var(--bg),inset 0 -45px 55px -35px var(--bg);pointer-events:none}#canvas-wrap{position:absolute;inset:0}canvas{width:100%;height:100%;display:block;touch-action:none}.scene-toolbar{position:absolute;right:40px;top:25px;z-index:4;display:flex;gap:10px;align-items:center}.segmented{border:1px solid #ffffff20;border-radius:4px;padding:3px;background:#0b141d88;display:flex}.segmented button{padding:8px 17px;background:none;color:#879eaa;font-size:13px;border-radius:2px}.segmented button.active{background:#2b424e;color:#e7f5f6}.tool-button{background:#101d2788;border:1px solid #ffffff1c;border-radius:4px;padding:11px;font-size:14px}.tool-button span{font-size:12px;margin-left:4px}.tool-button[aria-pressed=true]{border-color:#82cbbe6b}.scene-caption{position:absolute;top:32px;left:60px;color:#738b99;font:11px monospace;display:flex;gap:20px;align-items:center}.live-mark{color:#a7bec7;border:1px solid #57727f;padding:4px 7px;font:10px sans-serif;letter-spacing:.1em}.compass{position:absolute;right:43px;top:104px;display:flex;flex-direction:column;align-items:center;font:11px monospace;color:var(--muted)}.view-controls{position:absolute;right:40px;bottom:42px;display:flex;align-items:center;background:#10212dc9;backdrop-filter:blur(12px);border:1px solid #ffffff18;padding:6px;z-index:4;border-radius:5px}.view-controls button{background:none;padding:8px 12px;display:flex;gap:7px;align-items:center;font-size:19px}.view-controls span{font-size:12px}.view-controls .separator{height:20px;width:1px;background:#ffffff24;margin:0 7px}.interaction-hint{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);font-size:11px;white-space:nowrap;color:#748a98}.interaction-hint i{font-style:normal;padding:0 9px;color:#4a606d}.labels{position:absolute;inset:0;pointer-events:none;z-index:2}.map-label{position:absolute;left:0;top:0;background:#10232dce;border:1px solid #65899477;color:#e8f7f7;white-space:nowrap;border-radius:3px;font-size:12px;padding:6px 9px;box-shadow:0 4px 16px #0002;pointer-events:auto;transform:translate(-50%,-100%)}.map-label:after{content:"";width:1px;height:18px;background:#79bfb9;position:absolute;top:100%;left:50%}.map-label small{color:#96b3bf;font:10px monospace;margin-left:9px}.landmarks{position:absolute;bottom:0;left:40px;right:40px;height:102px;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #ffffff24;z-index:5;background:linear-gradient(0deg,var(--bg) 75%,#0b141dd9)}.landmarks button{display:flex;align-items:center;position:relative;text-align:left;background:none;padding:18px 20px 18px 0;gap:13px;min-width:0}.landmarks button+button{padding-left:22px;border-left:1px solid var(--line)}.landmarks button.active:before{content:"";position:absolute;height:2px;top:-1px;left:0;right:0;background:var(--accent)}.landmark-number{align-self:flex-start;margin-top:10px;font:10px monospace;color:#5c7684}.landmarks svg{height:52px;width:30px;fill:none;stroke:#7fabb2;stroke-width:1.3;flex-shrink:0}.landmark-title{font-size:15px;line-height:1.5;white-space:nowrap}.landmark-title small{display:block;color:#718895;font:9px/2.2 sans-serif;letter-spacing:.07em}.landmark-height{margin-left:auto;font-size:18px;color:#bed3db;white-space:nowrap;font-weight:300}.landmark-height small{font-size:10px;margin-left:3px;color:#738a96}footer{height:48px;display:flex;justify-content:space-between;align-items:center;margin:0 40px;border-top:1px solid var(--line);font-size:10px;color:#708895;letter-spacing:.03em}.footer-divider{margin:0 10px;color:#3f5968}footer a:hover{color:var(--accent)}.loading{position:absolute;inset:0;display:flex;gap:16px;flex-direction:column;justify-content:center;align-items:center;background:var(--bg);z-index:8}.loading strong{font-size:16px;font-weight:400}.loading>span:last-child{font-size:12px;color:var(--muted)}.loading-orbit{width:48px;height:48px;border:1px solid #254751;border-top-color:var(--accent);border-radius:50%;animation:spin 1.2s infinite linear}@keyframes spin{to{transform:rotate(360deg)}}.detail{position:absolute;right:42px;top:120px;width:256px;padding:25px;background:#0b1723df;border:1px solid #41627180;border-radius:4px;z-index:6;backdrop-filter:blur(16px)}.detail>button{position:absolute;right:9px;top:7px;background:none;color:#8aa5b3;font-size:22px}.detail .eyebrow{font-size:9px;line-height:1.7;max-width:185px}.detail h2{font-weight:500;font-size:22px;margin:13px 0 20px}.detail-height>span{font-size:37px;font-weight:300;letter-spacing:-.04em}.detail-height small{display:block;font-size:11px;color:#728d9c;margin:5px 0 20px}.detail p{font-size:13px;color:#aac0ca;line-height:1.85}.detail-coordinate{font:10px monospace;color:#60808e}.failure{position:absolute;inset:0;z-index:9;background:var(--bg)}.failure img{width:100%;height:100%;object-fit:contain;opacity:.4}.failure>div{position:absolute;left:10%;bottom:20%;max-width:80%;background:#0a1927e0;padding:22px}.failure p{font-size:14px;color:#a2b7c1}.failure button{padding:10px;background:var(--accent);color:#0b2423}[hidden]{display:none!important}dialog{max-width:680px;width:calc(100% - 32px);max-height:90dvh;background:#132430;color:var(--text);border:1px solid #385765;padding:30px;border-radius:6px;line-height:1.85}dialog::backdrop{background:#040b12bf;backdrop-filter:blur(6px)}.dialog-head{display:flex;justify-content:space-between;align-items:center}.dialog-head button{background:none;font-size:26px;color:#b8cdd5}dialog h2{font-size:26px;font-weight:400;margin:16px 0}dialog p{font-size:14px;color:#a5beca}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;border-block:1px solid #ffffff1a;padding:20px 0;margin:23px 0}.about-grid strong{font-weight:500;font-size:15px}.about-grid p{margin-bottom:0}.source-links{display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:13px;color:var(--accent)}.credits{font-size:11px!important;color:#73909e!important}.toast{position:fixed;bottom:162px;left:50%;transform:translateX(-50%);background:#24414d;padding:12px 22px;border:1px solid #5a8993;border-radius:5px;z-index:40;font-size:14px}
@media(min-width:1650px){.intro{top:75px;left:56px;width:290px}h1{font-size:76px}h1 span{font-size:36px}.intro-text{font-size:16px}.stage{left:285px}.landmark-title{font-size:17px}.landmark-height{font-size:23px}}
@media(max-height:800px) and (min-width:901px){.masthead{height:72px}main{height:calc(100dvh - 114px);min-height:480px}.intro{top:30px}h1{font-size:49px;margin-top:16px}h1 span{font-size:24px;margin-top:13px}.intro-text{margin:12px 0 17px}.intro-rule,.edition{display:none}.primary-button{margin-top:22px}.summary strong{font-size:21px}footer{height:42px}.stage{bottom:90px}.landmarks{height:90px}}
@media(max-width:1150px){.landmarks button{gap:8px;padding-right:12px}.landmarks button+button{padding-left:12px}.landmark-number{display:none}.landmark-title{font-size:13px}.landmark-title small{font-size:8px;letter-spacing:0}.landmark-height{font-size:15px}.coordinates{display:none}.intro{width:220px}.scene-caption{display:none}.stage{left:210px}.summary{gap:14px}}
@media(max-width:900px){body{overflow:auto}.masthead{height:75px;margin:0 22px}.brand{font-size:16px;gap:10px}.brand-icon{width:36px;height:36px;font-size:24px}.brand small{font-size:8px}.text-button{font-size:12px}.mast-right{gap:10px}main{height:calc(100dvh - 128px);min-height:650px}.intro{top:24px;left:24px;width:auto;right:24px;pointer-events:none}.intro .eyebrow{font-size:9px}h1{font-size:42px;margin-top:13px}h1 span{display:inline;font-size:16px;letter-spacing:0;margin-left:17px}h1 br{display:none}.intro-text,.intro-rule,.edition,.intro .primary-button{display:none}.summary{position:absolute;right:0;top:5px;gap:19px}.summary strong{font-size:18px}.summary span{font-size:9px}.stage{inset:112px 0 169px}.stage:after{box-shadow:inset 0 -30px 35px -22px var(--bg)}.scene-toolbar{right:23px;top:0}.tool-button span{display:none}.compass{top:64px;right:24px}.view-controls{right:24px;bottom:32px}.view-controls button{padding:6px 9px}.interaction-hint{bottom:7px;font-size:10px}.landmarks{height:160px;left:24px;right:24px;grid-template-columns:1fr 1fr}.landmarks button{padding:12px 12px 12px 0}.landmarks button+button{padding-left:12px}.landmarks button:nth-child(3){padding-left:0;border-left:0}.landmarks button:nth-child(n+3){border-top:1px solid var(--line)}.landmarks svg{height:43px;width:26px}.landmark-title{font-size:14px}.landmark-title small{font-size:8px}.landmark-height{font-size:18px}.detail{top:167px;right:24px;width:230px;padding:20px}.detail h2{font-size:20px;margin-bottom:10px}.detail-height>span{font-size:29px}.detail-height small{margin-bottom:9px}.detail p{font-size:12px}.detail-coordinate{display:none}footer{margin:0 24px;height:53px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:5px;font-size:9px}.map-label{font-size:10px;padding:4px 6px}.map-label small{display:none}}
@media(max-width:560px){.summary{display:none}h1 span{font-size:14px;margin-left:12px}.masthead{margin:0 20px}.intro{left:22px}.landmark-title{font-size:12px}.landmark-height{font-size:15px}.landmark-title small{font-size:7px}.source-links{grid-template-columns:1fr}.about-grid{grid-template-columns:1fr;gap:15px}dialog{padding:23px}.view-controls span{font-size:11px}.view-controls button{gap:5px}.detail{top:165px;right:20px;width:205px}.detail p{line-height:1.65}.detail .eyebrow{font-size:8px}.detail h2{font-size:18px}}
@media(max-width:560px){.landmarks button{gap:7px;flex-wrap:wrap;align-content:center}.landmarks svg{height:38px;width:19px;grid-row:1/3}.landmark-title{flex:1;font-size:13px}.landmark-title small{display:none}.landmark-height{font-size:14px;margin-left:26px;flex-basis:100%;margin-top:-8px}.landmarks button+button{padding-left:10px}.landmarks button:nth-child(3){padding-left:0}.stage{bottom:169px}.interaction-hint{font-size:10px}.view-controls{right:16px}.view-controls button{padding:6px 7px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}