@import url('data:text/css,');
:root{--ink:#25302f;--muted:#6d7874;--line:rgba(40,54,48,.15);--yellow:#f2d438;--paper:rgba(247,246,238,.88)}*{box-sizing:border-box}body{margin:0;overflow:hidden;color:var(--ink);font:14px -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:#d4e0dc}button,a,input,select{-webkit-tap-highlight-color:transparent}button,select{font:inherit;color:inherit}button{cursor:pointer;border:0;background:none}button:disabled{cursor:wait;opacity:.45}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid #9a7c00;outline-offset:4px}#scene{display:block;position:fixed;inset:0;width:100%;height:100%;outline:0;touch-action:none}.vignette{pointer-events:none;position:fixed;inset:0;background:linear-gradient(90deg,rgba(235,242,235,.4),transparent 40%),linear-gradient(180deg,rgba(235,242,235,.4),transparent 18%,transparent 70%,rgba(226,233,221,.18))}header{position:fixed;left:38px;right:38px;top:28px;display:flex;align-items:center;justify-content:space-between;z-index:3}.brand{display:flex;align-items:center;gap:20px;color:var(--ink);text-decoration:none}.brandmark{font-family:Georgia,serif;font-size:45px;letter-spacing:-4px;line-height:1}.branddot{font-size:11px;letter-spacing:0;padding-left:5px;color:#ae9326}.brandtext{font-size:15px;letter-spacing:2px;border-left:1px solid var(--line);padding-left:20px}.brandtext small{display:block;font-size:8px;letter-spacing:1.55px;margin-top:7px}nav{display:flex;align-items:center;gap:7px}nav button{height:38px;padding:0 14px;border:1px solid rgba(53,70,62,.16);background:rgba(244,247,239,.64);border-radius:30px;backdrop-filter:blur(12px);font-size:12px}nav button:hover{background:#f7f6ee}.sup{font-size:9px;vertical-align:super;margin-left:2px}.intro{position:fixed;top:23%;left:4.5vw;z-index:2;transition:opacity .55s,transform .55s}.eyebrow{font-size:9px;letter-spacing:2.2px;color:#46534b;display:flex;align-items:center;gap:10px}.eyebrow>span{display:block;width:20px;height:2px;background:#87904d}h1{font-weight:420;font-family:"Songti SC","STSong",serif;letter-spacing:6px;font-size:clamp(36px,4.5vw,66px);line-height:1.25;margin:22px 0 18px}h1>span{color:#ac9422;font-size:.7em;letter-spacing:0}p{line-height:1.85}.intro p{font-size:13px;line-height:1.95;color:#576258}.primary{display:flex;align-items:center;gap:20px;background:var(--yellow);padding:18px 24px;margin-top:28px;border-radius:3px;box-shadow:0 8px 28px rgba(74,64,14,.11);font-size:13px;font-weight:500}.primary:hover{background:#f9df48;transform:translateY(-1px)}.playicon{font-size:12px}.duration{margin-left:20px;font-size:11px;opacity:.5}.intro-meta{margin-top:16px;font-size:9px;letter-spacing:1.2px;opacity:.65}.intro-meta span{margin:0 8px}.telemetry{position:fixed;right:40px;top:36%;text-align:right;width:165px;pointer-events:none;transition:opacity .4s}.flight-status{display:flex;align-items:center;justify-content:flex-end;gap:7px;font-size:11px}.flight-status i{width:5px;height:5px;border-radius:50%;background:#7c8a40}.altitude{margin-top:15px;line-height:1}.altitude>span{font-weight:250;font-size:50px;font-variant-numeric:tabular-nums;letter-spacing:-2px}.altitude small{font-size:13px;margin-left:6px}.alt-label{font-size:7px;letter-spacing:1px;margin:10px 0}.meter{display:flex;gap:9px;justify-content:flex-end;align-items:center;height:12px;margin:18px 0 13px}.meter i{height:4px;width:1px;background:#7f8a7e}.meter i:nth-child(3n){height:10px}.speed{font-size:14px;font-variant-numeric:tabular-nums}.speed small{font-size:8px}.speed>span:last-child{font-size:8px;border-left:1px solid var(--line);margin-left:12px;padding-left:12px}.bottom-panel{position:fixed;bottom:46px;left:50%;transform:translateX(-50%);width:min(960px,calc(100% - 80px));background:var(--paper);backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,.55);border-radius:10px;box-shadow:0 5px 40px rgba(20,44,33,.09);padding:13px 19px 8px;z-index:4}.toolbar{display:flex;align-items:center;justify-content:space-between}.mode-switch{display:flex;gap:4px}.mode-switch button{font-size:11px;padding:8px 14px;border-radius:5px;color:#778076}.mode-switch button.active{color:#2e3931;background:#e4e7dd}.mode-switch button:hover{color:#26362d}.options{display:flex;align-items:center;gap:10px}.options button,.options select{font-size:10px;border:0;background:transparent;padding:6px}.options button[aria-pressed=true]{background:#f3e8a8;border-radius:4px}.options select{max-width:95px}.timeline{display:flex;align-items:center;gap:12px;margin:5px 0 7px}.timeline button{font-size:17px;padding:5px 8px}.time{font:10px ui-monospace,monospace;color:#718072}input[type=range]{width:100%;height:2px;accent-color:#b6a023;cursor:pointer}.chapters{display:flex;border-top:1px solid var(--line);padding-top:10px}.chapters button{text-align:left;flex:1;font-size:11px;padding:0 10px 5px 12px;border-left:1px solid var(--line)}.chapters button:first-child{border-left:0;padding-left:0}.chapters button>span{font:9px ui-monospace,monospace;color:#969e8c;margin-right:9px}.chapters small{display:block;font-size:8px;letter-spacing:.5px;padding-left:25px;color:#8b9387;margin-top:6px}.chapters button.active{color:#84701b}.chapters button.active>span{color:#84701b}.hint{position:fixed;bottom:242px;left:50%;transform:translateX(-50%);color:#37453e;background:rgba(245,247,238,.65);backdrop-filter:blur(8px);border-radius:20px;padding:8px 15px;font-size:10px;white-space:nowrap;transition:opacity .4s}.hint span{color:#788377;margin-left:13px}footer{position:fixed;bottom:14px;left:38px;right:38px;display:flex;justify-content:space-between;align-items:center;color:#49554c;font-size:7px;letter-spacing:1.1px}footer b{font-weight:400;letter-spacing:.5px;padding-left:12px}footer button{font-size:9px}#station-label{position:fixed;top:108px;left:40px;opacity:0;transition:opacity .4s;pointer-events:none}#station-number{font:9px ui-monospace,monospace;letter-spacing:2px}#station-title{font-weight:400;font-size:27px;letter-spacing:3px;margin:10px 0}#station-caption{font-size:11px;margin:0;opacity:.7}body.exploring .intro{opacity:0;transform:translateY(-10px);pointer-events:none}body.exploring #station-label{opacity:1}#crosshair{position:fixed;top:47%;left:50%;width:15px;height:15px;opacity:0;pointer-events:none;border:1px solid rgba(255,255,240,.5);border-radius:50%}body.fpv #crosshair,body.free #crosshair{opacity:.5}body.dark{--ink:#f1eee2;--muted:#cccac0;--line:rgba(229,226,199,.16);--paper:rgba(27,37,40,.85)}body.dark nav button{background:rgba(25,36,45,.55);border-color:rgba(255,255,255,.2)}body.dark .vignette{background:linear-gradient(180deg,rgba(8,22,36,.27),transparent 35%)}body.dark .mode-switch button.active{background:#3b463e;color:#e7e4d2}body.dark footer,body.dark .hint,body.dark .eyebrow{color:#dddcc5}body.dark .hint{background:rgba(20,30,35,.65)}body.dark .intro p{color:#dbdfc9}body.dark .primary{color:#283124}body.dark .branddot{color:var(--yellow)}body.dark .options select{color:#e9e8d6}body.dark .options option{background:#29372f}.touch-controls{display:none}.touch-controls.visible{display:flex;justify-content:space-between;position:fixed;left:22px;right:22px;bottom:234px;pointer-events:none}.touch-controls.visible>*{pointer-events:auto}#joystick{width:98px;height:98px;background:rgba(230,239,225,.27);border:1px solid rgba(255,255,255,.5);border-radius:50%;touch-action:none;display:grid;place-items:center}#joystick i{display:block;width:36px;height:36px;background:rgba(246,244,220,.8);border:1px solid rgba(74,92,68,.2);border-radius:50%}.vertical-controls{display:flex;flex-direction:column;gap:10px;justify-content:center}.vertical-controls button{background:rgba(246,244,220,.8);width:40px;height:40px;border-radius:50%;touch-action:none}dialog{color:#26362e;background:#f6f4e9;border:0;box-shadow:0 30px 100px #132b3344;border-radius:12px;width:min(1020px,92vw);max-height:85vh;padding:30px}dialog::backdrop{background:#152f3466;backdrop-filter:blur(12px)}.dialog-head{display:flex;justify-content:space-between;align-items:flex-start}.dialog-head h2{font-weight:400;font-family:"Songti SC",serif;font-size:28px;margin:15px 0 5px}.dialog-head button{font-size:28px;padding:0 8px}dialog>p{font-size:12px;color:#747d6e}.reference-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:22px}.reference-grid a{color:#3b493d;text-decoration:none;font-size:11px}.reference-grid img{width:100%;height:140px;object-fit:cover;border-radius:3px;display:block;margin-bottom:9px}.reference-grid small{display:block;font-size:9px;color:#929787;margin-top:4px}.about-body{max-width:760px;margin:auto;font-size:13px}.about-stats{display:flex;gap:45px;border-block:1px solid #d9decf;padding:20px 0;margin:24px 0}.about-stats b{display:block;font:36px Georgia,serif}.about-stats span{font-size:10px;color:#879078}.download{display:inline-block;text-decoration:none;color:#2e3629;background:#f0d341;padding:13px 20px;border-radius:4px;margin:14px 8px 14px 0;font-size:12px}.download.secondary{background:#e3e7d9}.metrics{font:10px ui-monospace,monospace;color:#8b927e}.loader-label{font:65px Georgia,serif;letter-spacing:-4px}.loader-label span{display:block;font:8px sans-serif;letter-spacing:3px;margin-top:20px}#loading{position:fixed;inset:0;z-index:20;background:#eceee5;display:flex;align-items:center;justify-content:center;flex-direction:column;transition:opacity .7s}#loading.gone{opacity:0;pointer-events:none}.loading-track{width:210px;height:2px;background:#d5dbcc;margin-top:38px}.loading-track i{display:block;height:100%;width:0;background:#ad9930;transition:width .2s}#loadingtext{font-size:12px;margin:18px 0 5px}#loading small{font-size:10px;color:#97a088}#loading button{margin-top:15px;padding:10px 20px;background:#dfd9a7;border-radius:4px}body.silent-ui header,body.silent-ui footer,body.silent-ui .bottom-panel,body.silent-ui .intro,body.silent-ui .telemetry,body.silent-ui .hint,body.silent-ui #station-label{display:none}
@media(max-height:780px) and (min-width:701px){.intro{top:21%}h1{font-size:46px}.intro p{font-size:11px}.primary{margin-top:18px;padding:14px 20px}.hint{bottom:216px}.bottom-panel{bottom:42px}.intro-meta{font-size:8px}.chapters small{display:none}.telemetry{top:32%}}
@media(max-width:700px){header{left:20px;right:20px;top:20px}.brand{gap:10px}.brandmark{font-size:35px}.brandtext{font-size:11px;letter-spacing:1px;padding-left:10px}.brandtext small{font-size:6px;letter-spacing:.5px;margin-top:5px}nav{gap:5px}nav button{padding:0 10px;height:32px;font-size:10px}#fullscreen{display:none}#references{font-size:0;padding:0 10px}#references .sup{font-size:10px;vertical-align:baseline}.intro{top:20%;left:25px}.eyebrow{font-size:7px;letter-spacing:1.4px}h1{font-size:42px;margin:15px 0}.intro p{font-size:11px}.primary{padding:14px 18px;margin-top:18px;gap:13px}.duration{margin-left:15px}.intro-meta{font-size:7px;letter-spacing:.7px}.telemetry{right:22px;top:22%;width:105px}.altitude>span{font-size:35px}.alt-label{font-size:5px;letter-spacing:0}.meter{gap:7px;margin:12px 0}.speed #fov{display:none}.flight-status{font-size:9px}.bottom-panel{width:calc(100% - 24px);bottom:45px;padding:10px 10px 6px;border-radius:8px}.mode-switch{gap:0}.mode-switch button{font-size:10px;padding:7px 9px}.options{gap:1px}.options button{font-size:8px;padding:6px 5px}.options select{font-size:8px;max-width:72px;padding:3px}.timeline{gap:8px;margin:7px 0}.chapters{padding-top:9px}.chapters button{font-size:9px;padding:0 3px 4px;text-align:center}.chapters button:first-child{padding:0 3px 4px}.chapters button>span{display:block;font-size:7px;margin:0 0 5px}.chapters small{display:none}.time{font-size:9px}.timeline button{font-size:15px;padding:3px 5px}.hint{bottom:209px;font-size:9px;padding:7px 12px}.hint span{display:none}footer{left:16px;right:16px;bottom:13px;font-size:5px;letter-spacing:.4px}footer b{display:block;font-size:7px;letter-spacing:.5px;padding:4px 0 0}footer button{font-size:8px}#station-label{left:24px;top:92px}#station-title{font-size:22px;margin:8px 0}#station-caption{font-size:9px;max-width:180px}#station-number{font-size:8px}.reference-grid{grid-template-columns:repeat(2,1fr);gap:14px}.reference-grid img{height:115px}dialog{padding:20px;max-height:88vh;width:94vw}.dialog-head h2{font-size:23px}.about-stats{gap:23px}.about-stats span{font-size:8px}.about-body{font-size:12px}.touch-controls.visible{bottom:218px}body.free .hint{display:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.music-setting{display:flex;align-items:center;gap:18px;margin:25px 0;padding:16px 0;border-top:1px solid #d8dccd}.music-setting input{max-width:220px}.music-setting a{color:#786c27;font-size:11px;white-space:nowrap}.options button[aria-pressed=true]{color:#544c21}#music[aria-pressed=true]{background:#e5d28a;color:#3f422e}
@media(max-width:480px){.toolbar{flex-wrap:wrap;gap:4px}.options{width:100%;justify-content:flex-end}.hint{bottom:239px}.touch-controls.visible{bottom:247px}.brandtext{font-size:10px}.brandtext small{font-size:5px}nav button{padding:0 8px}#music{font-size:9px}.music-setting{flex-wrap:wrap;gap:12px}.music-setting input{max-width:180px}}

.scene-visits{display:flex;gap:8px;justify-content:center;border-top:1px solid var(--line);padding-top:9px;margin-top:8px}.scene-visits button{font-size:10px;border-radius:20px;padding:5px 12px;background:rgba(130,145,117,.10)}.scene-visits button:hover{background:var(--yellow);color:#29312c}.hint{bottom:259px}.touch-controls.visible{bottom:264px}@media(max-width:700px){.scene-visits{gap:2px;padding-top:6px;margin-top:4px}.scene-visits button{font-size:8px;padding:4px 5px;flex:1}.hint{bottom:276px}.touch-controls.visible{bottom:287px}.telemetry{top:21%}}

/* r3 — keep the architecture clear; secondary controls open only on request. */
.bottom-panel{bottom:max(18px,env(safe-area-inset-bottom));width:min(660px,calc(100% - 36px));height:52px;padding:5px 10px;display:flex;align-items:center;gap:9px;border-radius:28px;background:rgba(247,246,238,.92);backdrop-filter:none;box-shadow:0 4px 20px #142a2420}
.bottom-panel>.timeline{flex:1;min-width:0;margin:0;gap:9px}.timeline button{width:34px;height:36px;padding:0;flex:none}.timeline input{min-width:40px;height:20px;margin:0;background:transparent}.timeline .time{flex:none}.bottom-panel>button{font-size:11px;height:36px;white-space:nowrap;border-radius:19px;padding:0 11px;flex:none}.bottom-panel>button:hover{background:#e3e4d6}#navigation-toggle{border-right:1px solid var(--line);border-radius:18px 0 0 18px!important}#navigation-toggle span{font-size:17px;margin-right:5px}#immersive{border-left:1px solid var(--line);border-radius:0 18px 18px 0}
#navigation-drawer{position:fixed;z-index:5;bottom:82px;left:max(20px,calc(50% - 330px));width:344px;max-height:calc(100dvh - 180px);overflow:auto;padding:22px;background:rgba(247,246,238,.98);color:#28382f;border:1px solid #ffffff80;border-radius:16px;box-shadow:0 15px 50px #142a2430}#navigation-drawer[hidden]{display:none}.drawer-head{display:flex;justify-content:space-between;align-items:center}.drawer-head small{font-size:8px;letter-spacing:2px;color:#7c826d}.drawer-head h2{font-weight:400;font-size:20px;margin:8px 0 12px}.drawer-head button{font-size:24px;border-radius:50%;width:32px;height:32px;background:#e7e8de}.drawer-caption{font-size:10px;color:#879078;margin:16px 0 8px}.toolbar{flex-direction:column;align-items:stretch;gap:13px}.mode-switch{display:flex;gap:4px}.mode-switch button{flex:1;padding:9px 3px;font-size:11px;background:#edf0e7}.mode-switch button.active{background:#f3df8c;color:#3d4329}.options{display:flex;justify-content:space-between;gap:6px}.options button,.options select{font-size:10px;padding:7px 5px}.scene-visits{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:17px;padding-top:17px}.scene-visits button{font-size:10px;border-radius:7px;padding:10px 2px}.chapters{display:grid;grid-template-columns:1fr 1fr;gap:6px;border:0;padding:0}.chapters button,.chapters button:first-child{border:0;border-radius:6px;padding:9px 7px;text-align:left;font-size:10px;background:#edf0e730}.chapters button>span{display:inline;font-size:9px;margin-right:7px}.chapters button.active{background:#f1e7bd}.chapters small{display:none}.drawer-note{font-size:9px;color:#879078;margin:15px 0 0}
.hint{bottom:82px;font-size:9px;padding:5px 11px;background:rgba(247,246,238,.65);backdrop-filter:none}.hint span{display:none}body.playing .hint{opacity:0;pointer-events:none}body.navigation-open .hint{opacity:0}footer{left:20px;right:20px;bottom:24px;width:auto;pointer-events:none}footer>span{font-size:0;max-width:calc((100vw - 730px)/2)}footer b{padding:0;font-size:7px;line-height:1.5;letter-spacing:.2px}footer button{pointer-events:auto;background:rgba(244,247,239,.7);border-radius:20px;padding:9px 12px}
.telemetry{top:105px;right:28px;width:auto}.altitude{display:inline-block;margin:10px 0 0}.altitude>span{font-size:28px}.alt-label,.meter{display:none}.speed{display:inline-block;margin-left:14px;font-size:12px}.speed #fov{display:none}.flight-status{font-size:9px}.altitude small{font-size:10px}.speed small{font-size:9px}#station-label{top:103px;left:30px}#station-title{font-size:20px;letter-spacing:2px;margin:8px 0}#station-caption{font-size:10px;max-width:210px}body.playing #station-caption{display:none}#crosshair{display:none}
body.dark .bottom-panel,body.dark #navigation-drawer{background:rgba(28,39,42,.96);color:#efeee5}body.dark .drawer-head button{background:#3b4846}body.dark .mode-switch button{background:#35423d;color:#d9dfd0}body.dark .mode-switch button.active{background:#ddcc7d;color:#34382b}body.dark .chapters button.active{background:#5d5c3b;color:#fff2b2}body.dark .bottom-panel>button:hover{background:#445148}body.dark footer button{background:#243234bf}body.dark .time{color:#b1bba9}body.dark .drawer-caption,body.dark .drawer-note{color:#b0baaa}
body.immersive header,body.immersive footer,body.immersive .bottom-panel,body.immersive .intro,body.immersive .telemetry,body.immersive .hint,body.immersive #station-label{display:none}#restore-ui{position:fixed;z-index:6;bottom:max(18px,env(safe-area-inset-bottom));right:20px;height:35px;border-radius:20px;padding:0 16px;font-size:10px;background:#f3f1e6cc;color:#3e483c}#restore-ui[hidden]{display:none}.touch-controls.visible{bottom:95px}
@media(max-width:1000px){footer>span{display:none}footer{bottom:80px}body.playing footer{display:none}}
@media(max-width:700px){.bottom-panel{width:calc(100% - 24px);bottom:max(12px,env(safe-area-inset-bottom));height:48px;padding:4px 5px;gap:4px}.bottom-panel>button{padding:0 8px;font-size:10px}.timeline button{width:26px;min-width:26px}.bottom-panel>.timeline{gap:5px}.timeline .time{font-size:8px}.timeline .time:nth-last-child(2){display:none}#navigation-toggle span{display:none}#navigation-drawer{left:12px;bottom:70px;width:min(344px,calc(100% - 24px));padding:18px;max-height:calc(100dvh - 160px)}.hint{bottom:71px;font-size:8px}.telemetry{right:20px;top:89px}.altitude>span{font-size:22px}.speed{display:none}#station-label{left:20px;top:89px}#station-title{font-size:18px}#station-caption{max-width:190px;font-size:9px}.scene-visits button{font-size:10px;padding:10px 3px}.options{width:auto}.options button,.options select{font-size:10px}.touch-controls.visible{bottom:89px}footer{bottom:74px;right:13px}footer button{font-size:8px}.chapters button>span{display:inline}.toolbar{flex-wrap:nowrap}.brandtext small{display:none}.brandtext{font-size:10px;padding-left:8px}header{left:16px;right:16px}nav{gap:4px}nav button{height:30px;padding:0 7px}#station-number{font-size:7px}}
.timeline input[type=range]{appearance:none;-webkit-appearance:none;height:22px;background:transparent;outline-offset:0}.timeline input::-webkit-slider-runnable-track{height:2px;background:linear-gradient(to right,#b59e33 var(--progress,0%),#8b938755 var(--progress,0%));border-radius:2px}.timeline input::-webkit-slider-thumb{appearance:none;-webkit-appearance:none;width:10px;height:10px;margin-top:-4px;border-radius:50%;background:#b59e33;border:0}.timeline input::-moz-range-track{height:2px;background:#8b938755}.timeline input::-moz-range-progress{height:2px;background:#b59e33}.timeline input::-moz-range-thumb{height:10px;width:10px;border:0;background:#b59e33;border-radius:50%}

/* Reveal the transport gently, without moving the camera or resizing the canvas. */
.bottom-panel{transition:transform .85s cubic-bezier(.22,.61,.36,1),opacity .7s;will-change:transform}body.controls-hidden .bottom-panel{transform:translate(-50%,calc(100% + 28px));opacity:0;pointer-events:none}body.controls-hidden .bottom-panel:focus-within{transform:translate(-50%,0);opacity:1;pointer-events:auto}
#transport-reveal{position:fixed;z-index:4;left:50%;transform:translateX(-50%);bottom:0;width:min(700px,calc(100% - 24px));height:76px;padding:0;pointer-events:none;opacity:0;transition:opacity .8s}#transport-reveal::after{content:'';position:absolute;bottom:7px;left:calc(50% - 22px);width:44px;height:3px;border-radius:2px;background:rgba(243,236,195,.7)}body.controls-hidden #transport-reveal{pointer-events:auto;opacity:1}body.immersive #transport-reveal,body.silent-ui #transport-reveal{display:none}body.playing footer{opacity:0;pointer-events:none}body.playing footer button{pointer-events:none}
#loading{color:#25302f}body.dark .intro{text-shadow:0 2px 15px rgba(10,25,35,.65)}body.dark .intro .primary{text-shadow:none}

#transport-reveal{z-index:3}body.playing #transport-reveal{pointer-events:auto}