:root{color-scheme:dark;--muted:#8595af;--text:#e5edf9}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#030610;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;-webkit-font-smoothing:antialiased}button{font:inherit;cursor:pointer;color:inherit;background:transparent;border:0}button:focus-visible{outline:2px solid #afcfff;outline-offset:6px}button:disabled{opacity:.4;cursor:default}[hidden]{display:none!important}#universe{position:fixed;inset:0;touch-action:none;cursor:grab}#universe.dragging{cursor:grabbing}#universe canvas{display:block;width:100%;height:100%}.shade{position:fixed;inset:0;background:linear-gradient(90deg,rgba(2,6,16,.78),transparent 52%),linear-gradient(0deg,#030610c9,transparent 18%,transparent 80%,#030610b0);pointer-events:none}header{position:fixed;top:0;left:0;right:0;padding:30px 40px;display:flex;align-items:center;justify-content:space-between;pointer-events:none}.brand{display:flex;align-items:center;gap:12px;font-size:17px;letter-spacing:2px;font-weight:500}.brand svg{width:30px;height:30px;fill:none;stroke:#c6d9f5;stroke-width:1.2}.brand small{display:block;font-size:7px;letter-spacing:2px;color:#6e7e99;margin-top:7px}.top-actions{display:flex;align-items:center;gap:25px;font-size:11px;color:#7a8aa4}.top-actions button{pointer-events:auto;border:1px solid #3b4c6866;border-radius:5px;padding:10px 13px;color:#b5c5dc}.opening{position:fixed;left:6.5vw;top:31vh;max-width:380px;pointer-events:none;transition:opacity .4s,transform .4s}.opening button{pointer-events:auto}.eyebrow{font-size:11px;letter-spacing:2px;color:#94adcf;margin-bottom:20px}h1{font-size:clamp(30px,3.1vw,43px);line-height:1.55;font-weight:500;letter-spacing:1px;margin:0 0 22px}p{font-size:14px;color:#98a9c0;line-height:1.95;margin:0 0 30px}.start{font-size:12px;padding:13px 18px;border:1px solid #6e8cb36e;border-radius:5px;background:#172d493d;min-width:168px;text-align:left;backdrop-filter:blur(10px)}.start span{float:right;color:#a9c8ed}.start:hover{background:#274c737d;border-color:#9cbde6}.marker{position:fixed;left:0;top:0;display:flex;align-items:center;gap:12px;text-align:left;padding:12px;transform:translate(-14px,-50%);transition:opacity .3s;white-space:nowrap}.reticle{width:22px;height:22px;position:relative;border:1px solid #9ab9df5c;border-radius:50%;transition:transform .2s,border-color .2s}.reticle:after{content:'';position:absolute;inset:7px;background:#bdd5f5;border-radius:50%;box-shadow:0 0 12px #b6d8ff99}.sun .reticle{border-color:#eac68899}.sun .reticle:after{background:#fbd9a3;box-shadow:0 0 14px #fbd9a3}.marker-text{display:block;background:#07102179;padding:5px 9px;border-radius:4px;backdrop-filter:blur(8px)}.marker-text b{font-size:12px;font-weight:500;color:#d7e3f5;letter-spacing:1px}.marker-text small{display:block;font-size:10px;color:#7d95b2;margin-top:5px}.marker:hover .reticle{transform:scale(1.35);border-color:#e4efff}.marker:hover .marker-text{background:#112139c9}.detail{position:fixed;left:6.5vw;top:27vh;width:330px;animation:appear .6s ease}.return{font-size:11px;color:#8aa2c1;margin-bottom:35px;padding:0}.detail h2{font-size:29px;line-height:1.55;font-weight:500;margin:0 0 22px}.detail p{font-size:14px}.voice{border:1px solid #6685b159;border-radius:5px;font-size:12px;padding:11px 17px;color:#c3d5ec;background:#0a172833}.sample-note{font-size:10px;color:#617797;line-height:1.9;max-width:275px;margin-top:22px}.object-caption{position:fixed;left:67%;bottom:22%;transform:translateX(-50%);font-size:11px;color:#9dabc2;letter-spacing:1px}.travel{position:fixed;left:50%;bottom:17%;transform:translateX(-50%);font-size:12px;color:#a3b8d3;letter-spacing:2px;pointer-events:none}.travel span{letter-spacing:5px}footer{position:fixed;left:40px;right:40px;bottom:25px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:18px;border-top:1px solid #657b9a29;font-size:10px;color:#7187a5;pointer-events:none}.location{display:flex;align-items:center;gap:9px}.location>span{color:#a3b5d0}.location small{font-size:9px;color:#4f6483;margin-left:8px}.status-dot{width:4px;height:4px;background:#a4c6f0;border-radius:50%}.gesture{display:flex;gap:14px;align-items:center;color:#667f9f}.gesture i{height:2px;width:2px;background:#415674;border-radius:50%}.zoom{display:flex;align-items:center;border:1px solid #33496780;border-radius:5px;background:#07112280;pointer-events:auto}.zoom button{width:30px;height:30px;font-size:16px}.zoom span{font-size:9px;padding:0 8px;min-width:44px;text-align:center;color:#839dbb}.load-error{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);font-size:15px;padding:30px;background:#101c30}.in-focus .opening,.in-flight .opening{opacity:0;transform:translateY(12px);visibility:hidden}.in-focus #markers,.in-flight #markers{opacity:0;pointer-events:none}.in-flight #home,.in-flight .zoom button{pointer-events:none;opacity:.4}@keyframes appear{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(max-width:750px){header{padding:24px}.brand{font-size:15px}.prototype{display:none}.top-actions button{font-size:10px}.opening{left:24px;top:19vh;max-width:280px}h1{font-size:30px;line-height:1.5}.opening p{font-size:12px;margin-bottom:20px}.eyebrow{font-size:10px;margin-bottom:14px}.start{font-size:11px;padding:11px 14px}.shade{background:linear-gradient(180deg,#0306109c,transparent 60%),linear-gradient(0deg,#030610d9,transparent 30%)}footer{left:24px;right:24px;bottom:20px;gap:8px}.location small{display:none}.gesture{position:fixed;left:24px;bottom:76px;font-size:9px;gap:10px}.marker{gap:6px;padding:8px;transform:translate(-10px,-50%)}.marker-text{padding:4px 6px}.marker-text b{font-size:10px}.marker-text small{font-size:8px;max-width:110px}.reticle{height:18px;width:18px}.reticle:after{inset:6px}.detail{left:24px;right:24px;top:auto;bottom:118px;width:auto;max-width:370px;background:linear-gradient(90deg,#030610b0,#03061044);border-radius:8px;padding:16px 0 0}.detail .return{margin-bottom:18px}.detail h2{font-size:23px;line-height:1.5;margin-bottom:12px}.detail p{font-size:12px;margin-bottom:17px;max-width:340px}.detail .eyebrow{font-size:9px;margin-bottom:12px}.sample-note{font-size:9px;margin-top:12px;max-width:330px}.object-caption{left:50%;bottom:auto;top:41%;font-size:9px}.in-focus .gesture{display:none}.travel{font-size:10px;bottom:16%}}@media(prefers-reduced-motion:reduce){.detail{animation:none}.opening{transition:none}}

.marker.edge{flex-direction:row-reverse;transform:translate(calc(-100% + 14px),-50%)}
.detail{top:20vh;width:355px;max-height:68vh;overflow-y:auto;padding-right:10px;scrollbar-width:thin;scrollbar-color:#425572 transparent}.detail .return{margin-bottom:20px}.detail h2{font-size:26px;margin-bottom:16px}.detail p{font-size:13px;margin-bottom:16px}.lesson-tabs{display:flex;gap:5px;flex-wrap:wrap;margin:0 0 23px}.lesson-tabs button{font-size:10px;padding:7px 8px;color:#829ab8;border-bottom:1px solid #364c6766}.lesson-tabs button.selected{color:#d3e6ff;border-color:#a9cfff;background:#10213a55}.lesson-controls{margin:16px 0}.lesson-action{font-size:11px;padding:10px 14px;border:1px solid #6b91bd77;border-radius:5px;color:#c6defa;background:#11233b66}#lesson-observe{font-size:11px;line-height:1.8;color:#b2c7e2;border-left:2px solid #53769c;padding-left:11px}.lesson-progress{display:flex;justify-content:space-between;gap:8px;align-items:center;border-top:1px solid #49628266;padding-top:17px;margin-top:23px;font-size:9px;color:#7a96b9}.lesson-progress button{font-size:10px;color:#c4d9f4;padding:6px 3px}.lesson-progress>div{display:flex;gap:13px}.lesson-controls label{display:block;font-size:11px;color:#a9c3e1;margin-bottom:12px}.lesson-controls input{width:100%;accent-color:#a2c9f6}.stage-ticks{display:flex;justify-content:space-between;margin-top:9px;font-size:9px;color:#8da9c9}.quiz-count{font-size:9px;color:#799abc;margin-bottom:10px}.quiz-title{font-size:13px;line-height:1.8}.quiz-options{display:flex;flex-direction:column;gap:8px;margin-top:12px}.quiz-options button{font-size:11px;line-height:1.8;text-align:left;border:1px solid #47648866;padding:9px 11px;border-radius:5px;background:#0a1a3088}.quiz-options button.chosen{border-color:#b1d1fa;background:#23456977}#quiz-feedback{font-size:11px;line-height:1.8;color:#c6d7ed;margin:12px 0}.completion{font-size:12px;line-height:2;color:#d0def1}.sample-note a{color:#90aed2;text-decoration:none}.in-focus .gesture{visibility:hidden}@media(max-width:750px){.detail{top:auto;bottom:105px;left:24px;right:24px;width:auto;max-height:46vh;padding:15px 8px 10px 12px;background:#07101ce8;border:1px solid #4d66813b;backdrop-filter:blur(12px)}.detail h2{font-size:21px}.detail p{font-size:12px}.lesson-tabs{gap:4px;margin-bottom:16px}.lesson-tabs button{font-size:9px;padding:6px}.detail .return{margin-bottom:14px}.sample-note{margin-top:15px}.lesson-progress{margin-top:15px}.object-caption{top:39%}}
#solar-journey{position:fixed;inset:0;pointer-events:none;z-index:4}#solar-journey button,#solar-journey input,#solar-journey a{pointer-events:auto}.solar-active #detail,.solar-active #object-caption{display:none!important}.solar-active .zoom{position:relative;z-index:5}.journey-top{position:absolute;top:100px;left:6.5vw;right:6.5vw;display:flex;align-items:center;gap:22px;color:#8da7c8;font-size:10px}.journey-top button{font-size:11px;padding:8px 0}.journey-top button:last-child{margin-left:auto;border:1px solid #5d7ca44d;border-radius:5px;padding:9px 13px}.journey-intro{position:absolute;top:23vh;left:6.5vw;width:330px}.journey-intro h2{font-size:29px;line-height:1.5;font-weight:500;margin:0 0 20px}.journey-intro p{font-size:13px;line-height:1.9;color:#a5b9d3;margin-bottom:20px}.journey-intro .eyebrow{font-size:10px}.journey-intro #journey-more{font-size:10px;color:#9bb8dc;padding:0 0 8px;border-bottom:1px solid #4660805c}#journey-deeper{font-size:11px;line-height:1.85;margin-top:15px;padding:12px 14px;background:#091529d9;border:1px solid #57719744;border-radius:5px;color:#b4c5db;max-height:200px;overflow:auto;pointer-events:auto}.journey-caption{position:absolute;top:65%;left:66%;width:390px;max-width:40vw;transform:translateX(-50%);font-size:11px;line-height:1.8;text-align:center;color:#aac0da;letter-spacing:1px}.journey-bottom{position:absolute;bottom:95px;left:6.5vw;right:6.5vw;padding:16px 22px;background:linear-gradient(90deg,#071121df,#07112199);border:1px solid #4c6b8b33;border-radius:8px;backdrop-filter:blur(12px);max-height:32vh;overflow:auto;pointer-events:auto}#journey-prompt{font-size:13px;color:#c6d8ed;line-height:1.8}.journey-bottom label{display:block;color:#8eacd0;font-size:10px;margin:14px 0 5px}.journey-bottom input{width:100%;accent-color:#a9d2ff;height:20px}.journey-nav{display:flex;gap:18px;align-items:center;justify-content:space-between;margin-top:13px}.journey-nav button{font-size:11px;color:#c9def9}.journey-nav button:last-child{padding:10px 15px;border:1px solid #597aa659;border-radius:5px;background:#19345466}.journey-nav button:disabled{opacity:.3}#journey-dots{display:flex;gap:9px}#journey-dots button{padding:0;min-width:6px;width:6px;height:6px;border-radius:50%;background:#536c8d;border:0}#journey-dots button.current{background:#d4e7ff;box-shadow:0 0 8px #a9cfff66}.journey-boundary{font-size:8px;color:#5c7799;margin-top:13px;line-height:1.7}.journey-boundary a{color:#7d9dc6;text-decoration:none}.journey-action{padding:10px 17px;border:1px solid #6788b05c;border-radius:5px;font-size:11px;color:#cbdff8;margin-top:12px;background:#10274588}.nucleus{position:absolute;left:65%;top:46%;transform:translate(-50%,-50%);font-size:11px;display:flex;gap:15px;padding:9px 14px;border:1px solid #8dafd87d;border-radius:5px;background:#10223899}.nucleus b{font-weight:400}.journey-question{font-size:12px;margin:10px 0;color:#c5d7ed}.journey-answers{display:flex;gap:10px}.journey-answers button{padding:10px 13px;border:1px solid #5c80b05c;border-radius:5px;text-align:left;font-size:11px;color:#a8c0de;line-height:1.7}.journey-answers button.chosen{border-color:#b6d7ff;background:#24436766}#journey-feedback{font-size:11px;line-height:1.8;color:#bcd0e8;margin-top:10px}.journey-discoveries{font-size:12px;line-height:1.9;margin-top:12px;color:#cce0f9}.solar-active .gesture{display:none}@media(max-width:750px){.journey-top{top:87px;left:24px;right:24px;gap:10px;font-size:9px}.journey-top button{font-size:10px}.journey-top button:last-child{padding:7px 9px}.journey-intro{top:142px;left:24px;right:24px;width:auto;max-width:350px}.journey-intro h2{font-size:22px;line-height:1.45;margin-bottom:10px}.journey-intro p{font-size:11px;line-height:1.8;margin-bottom:10px;max-width:330px}.journey-intro .eyebrow{font-size:9px;margin-bottom:9px}#journey-deeper{position:relative;z-index:8;background:#091629f5;max-height:150px;font-size:10px}.journey-caption{top:58%;left:50%;max-width:90vw;width:330px;font-size:9px;background:#03061066;padding:3px}.journey-bottom{left:20px;right:20px;bottom:100px;padding:12px 13px;max-height:28vh}.journey-bottom label{font-size:9px;margin-top:10px}#journey-prompt{font-size:11px}.journey-nav{gap:8px;margin-top:10px}.journey-nav button{font-size:9px}.journey-nav button:last-child{padding:9px;max-width:160px}.journey-boundary{font-size:7px}.nucleus{left:50%;top:46%;font-size:10px}.journey-answers{flex-direction:column;gap:6px}.journey-answers button{font-size:10px;padding:7px 10px}.journey-question{font-size:11px}.journey-discoveries{font-size:10px}.journey-action{padding:8px 11px;font-size:10px}#journey-feedback{font-size:10px}}

@media(max-width:750px){.journey-caption{top:60%}.journey-intro{pointer-events:none}#journey-deeper{pointer-events:auto}}

#earth-overlay{position:fixed;inset:0;z-index:20;background:#040b14}#earth-frame{width:100%;height:100%;border:0}#earth-entry{pointer-events:auto;border:1px solid #526b8e77;padding:10px 13px;border-radius:5px;color:#c4dcfb;font-size:11px}@media(max-width:750px){#earth-entry{padding:9px;font-size:9px}.top-actions{gap:8px}}

#earth-explorer{position:fixed;inset:0;z-index:8;opacity:0;pointer-events:none;transition:opacity .45s ease;background:#030610}#earth-explorer[hidden]{display:none}#earth-explorer.visible{opacity:1;pointer-events:auto}#earth-view{position:absolute;inset:0}#earth-explorer .earth-top{position:absolute;top:30px;left:6.5vw;right:6.5vw;display:flex;align-items:center;gap:25px;color:#9fb4d0;font-size:11px}#earth-explorer button{background:#071322bb;border:1px solid #6a87ac55;padding:10px 13px;border-radius:4px;color:#c3d8f4;font:inherit;font-size:11px;cursor:pointer}#earth-explorer button:disabled{opacity:.45;cursor:default}#earth-explorer button:focus-visible{outline:2px solid #99c5ff;outline-offset:3px}.earth-top span{margin-right:auto}.earth-info{position:absolute;left:6.5vw;top:23vh;width:310px;color:#d2def0;text-shadow:0 2px 12px #02060b}.earth-info h2{font-size:28px;line-height:1.5;font-weight:500;margin:16px 0}.earth-info p{font-size:13px;line-height:1.9;color:#a8bcd8}#earth-status{font-size:12px;line-height:1.9;margin:20px 0;color:#bbd2ef}.earth-actions{display:flex;gap:8px;flex-wrap:wrap}.earth-limit{font-size:10px;line-height:1.9;color:#8ca7c9;margin-top:20px;max-width:290px;background:#071322bb;padding:8px 10px}.earth-limit summary{cursor:pointer;color:#b2c7e2}.earth-hud{position:absolute;left:6.5vw;right:6.5vw;bottom:58px;display:flex;justify-content:space-between;gap:14px;font-size:10px;color:#c0d4f0;text-shadow:0 1px 5px #000}#earth-ground-controls{margin-top:16px}#earth-ground-controls[hidden]{display:none}#earth-ground-controls label{display:block;font-size:10px;margin-top:12px}#earth-ground-controls input{display:block;width:100%;margin-top:12px;accent-color:#9ebfee}#earth-explorer.ground .earth-info{top:auto;bottom:100px;background:#061221cc;padding:16px;width:340px}#earth-explorer.ground .earth-info h2,#earth-explorer.ground .earth-info>p{display:none}#earth-explorer .cesium-viewer-bottom{background:#071322c9;color:#c7d8ed}#earth-explorer .cesium-credit-textContainer a{color:#c7d8ed!important}.marker.earth .reticle{border-color:#7fbeea}.marker.earth b{color:#b5dbff}
@media(max-width:750px){#earth-explorer .earth-top{top:24px;left:24px;right:24px;gap:12px;font-size:9px}#earth-explorer button{font-size:10px;padding:8px 10px}.earth-info{left:24px;right:24px;top:auto;bottom:110px;width:auto;max-height:36vh;overflow:auto;background:#061221d9;padding:14px}.earth-info h2{font-size:21px;margin:10px 0}.earth-info p{font-size:11px}#earth-status{font-size:11px;margin:12px 0}.earth-hud{left:24px;right:24px;bottom:52px;flex-wrap:wrap;font-size:8px}.earth-hud span:last-child{width:100%}#earth-explorer.ground .earth-info{width:auto;bottom:100px}.earth-limit{margin-top:12px}}

.earth-active>header{z-index:12}.earth-active>header .top-actions{visibility:hidden}#earth-explorer .earth-top{top:100px}@media(max-width:750px){#earth-explorer .earth-top{top:100px}}

#earth-explorer .earth-info{pointer-events:none;transition:opacity .55s ease,transform .55s ease;max-width:310px}#earth-explorer.exploring .earth-info{opacity:0;transform:translateY(8px)}.earth-quality{position:absolute;left:6.5vw;bottom:100px;font-size:10px;color:#8ca7c9;line-height:1.9;max-width:290px;padding:8px 10px;background:#071322a9}.earth-quality summary{cursor:pointer;color:#afc7e5}.earth-hud{pointer-events:none}#earth-explorer .earth-hud{font-size:10px;flex-wrap:wrap}#earth-explorer .earth-top{pointer-events:none}#earth-explorer .earth-top button{pointer-events:auto}@media(max-width:750px){.earth-quality{left:24px;bottom:112px;max-width:280px;font-size:9px}#earth-explorer .earth-info{max-width:none;bottom:180px;background:#061221b8}.earth-hud{font-size:8px!important}#earth-status{margin:0!important;font-size:9px!important;width:100%}}

#earth-explorer .earth-hud{background:#071322ba;padding:10px 12px;border-radius:4px;align-items:center}#earth-explorer .earth-hud #earth-status{margin:0;font-size:10px}.earth-quality{bottom:120px}@media(max-width:750px){.earth-quality{bottom:145px}#earth-explorer .earth-info{bottom:205px}}

#place-guide{position:absolute;right:6.5vw;top:22vh;width:340px;max-height:61vh;overflow:auto;padding:20px 22px;background:#06101eeb;border:1px solid #7c9ec33d;border-radius:6px;backdrop-filter:blur(14px);color:#ceddf1;scrollbar-width:thin;scrollbar-color:#597391 transparent;transition:opacity .2s ease}#place-guide[hidden]{display:none}#place-guide.moving{opacity:.32;pointer-events:none}.place-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.place-heading small{font-size:9px;color:#89a7cd;line-height:1.8}.place-heading h3{font-size:22px;line-height:1.4;font-weight:500;margin:7px 0 0}#earth-explorer #place-fold{padding:3px 9px;font-size:16px;border-color:#6a87ac33}.folded #place-body{display:none}#place-theme{font-size:13px;color:#c6dbf4;line-height:1.8;margin:17px 0}.place-tabs{display:flex;gap:5px;border-bottom:1px solid #7c9ec330;padding-bottom:9px}#earth-explorer .place-tabs button{padding:6px 7px;font-size:10px;border:none;border-radius:0;color:#809bbd;background:transparent}#earth-explorer .place-tabs button[aria-selected=true]{color:#cce5ff;border-bottom:1px solid #8abbe9}#place-content>p{font-size:12px;line-height:1.95;color:#b0c4df;margin:15px 0}.place-task{border-left:2px solid #648dbc;padding-left:11px;margin:17px 0}.place-task small{font-size:10px;color:#9fc3ed}.place-task p{font-size:11px;line-height:1.9;margin:7px 0;color:#9eb4d1}#place-sources{display:flex;flex-direction:column;gap:7px;margin-top:18px}#place-sources a{font-size:9px;color:#86a6ce;text-decoration:none;line-height:1.7}#earth-explorer #place-question{font-size:10px;padding:8px 10px}#place-quiz p{font-size:11px;line-height:1.9}#place-quiz button{display:block;width:100%;font-size:10px;text-align:left;margin:6px 0;line-height:1.8}#place-feedback{color:#b1cff4}.place-bottom{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;align-items:center;border-top:1px solid #7c9ec32a;padding-top:12px}#earth-explorer .place-bottom button{font-size:9px;padding:7px 9px}#place-saved{font-size:9px;color:#9fc8b0}.place-stops{display:flex;flex-direction:column;gap:8px}#earth-explorer .place-stops button{text-align:left;padding:10px 12px;background:#0e2135bb}.place-stops b{display:block;font-size:11px;font-weight:500}.place-stops small{display:block;font-size:9px;line-height:1.8;color:#89a8cd;margin-top:4px}#place-journal{border-top:1px solid #7c9ec32a;margin-top:12px;padding-top:12px;font-size:11px;line-height:1.8}#place-journal button{display:block;width:100%;text-align:left;margin:8px 0;font-size:10px;line-height:1.8}#place-guide a:focus-visible{outline:2px solid #a6c9f8;outline-offset:3px}@media(max-width:750px){#place-guide{top:auto;bottom:145px;left:24px;right:24px;width:auto;max-height:38vh;padding:14px 16px}.place-heading h3{font-size:19px}.place-heading small{font-size:8px}#place-theme{font-size:11px;margin:12px 0}#place-content>p{font-size:11px;line-height:1.9}.place-task p{font-size:10px}.earth-quality{left:auto;right:24px;bottom:118px;padding:3px 6px;font-size:8px;max-width:260px}#earth-explorer .earth-info{bottom:225px}#earth-explorer:has(#place-guide:not([hidden])) .earth-info{opacity:0}}

.place-heading{position:sticky;top:0;z-index:1;background:#06101ef5;padding-bottom:6px}#place-guide.folded{max-height:none}

#earth-explorer:not(.visible) *{pointer-events:none!important}

#place-guide{display:flex;flex-direction:column;overflow:hidden}.place-heading{position:relative;flex-shrink:0}#place-body{min-height:0;overflow:auto;scrollbar-width:thin;scrollbar-color:#597391 transparent}

#place-body{overflow-anchor:none}
/* Planet exploration: one shared sky, clear touch targets and readable Chinese. */
.opening{top:145px;left:6.5vw;max-width:350px}.opening h1{font-size:30px;line-height:1.55;margin-bottom:12px}.opening p{font-size:14px}.opening .eyebrow{margin-bottom:12px}
#planet-nav{position:fixed;z-index:6;bottom:90px;left:50%;transform:translateX(-50%);display:flex;gap:4px;max-width:88vw;background:#06101cc4;padding:5px 8px;border:1px solid #536b8b40;border-radius:6px;backdrop-filter:blur(12px)}#planet-nav button{font-size:14px;min-height:44px;min-width:62px;border-radius:3px;color:#c1d5f0}#planet-nav button:hover,#planet-nav button:focus-visible{background:#284362aa;color:white}.in-focus #planet-nav,.in-flight #planet-nav,.earth-active #planet-nav{display:none}.marker{min-height:44px;min-width:68px}.marker-text b{font-size:14px}.marker-text{background:#071021bc}.reticle{width:24px;height:24px}
#tap-hint{position:fixed;z-index:7;left:50%;transform:translateX(-50%);bottom:158px;max-width:85vw;width:max-content;background:#071426ed;padding:12px 16px;border:1px solid #55739c66;border-radius:5px;font-size:14px;line-height:1.8;color:#d2e2f5;pointer-events:none}
#planet-explorer{position:fixed;inset:0;z-index:4;pointer-events:none}#planet-explorer button,#planet-explorer input,#planet-explorer a,.planet-intro,.planet-observe{pointer-events:auto}#planet-explorer button{min-height:44px;padding:8px 12px;border:1px solid #5c7da457;border-radius:4px;background:#0a1931b3;font-size:14px;color:#cedff5}.planet-top{position:absolute;top:100px;left:6.5vw;right:6.5vw;display:flex;align-items:center;gap:18px;font-size:14px;color:#94afd1}.planet-top button:last-child{margin-left:auto}.planet-intro{position:absolute;left:6.5vw;top:21vh;width:min(360px,31vw);max-height:65vh;overflow:auto;scrollbar-width:thin;padding-right:8px}.planet-intro .eyebrow{font-size:14px;letter-spacing:1px}.planet-intro h2{font-size:28px;font-weight:500;line-height:1.5;margin:13px 0 18px}.planet-intro p{font-size:16px;line-height:1.95;color:#bed0e8;margin:17px 0}#planet-scenes{display:flex;gap:5px;flex-wrap:wrap}#planet-explorer #planet-scenes button{font-size:13px;border:none;background:transparent;padding:8px 5px;color:#8ca7cb}#planet-explorer #planet-scenes button[aria-selected=true]{color:#e1eeff;border-bottom:1px solid #9cc6ef;border-radius:0}#planet-source{display:block;margin:17px 0 10px;font-size:12px;color:#90afd7;text-decoration:none}#planet-explorer #planet-related{font-size:13px;border:none;padding:5px 0;background:transparent;text-align:left;color:#9cbce6}#planet-quiz button{display:block;width:100%;text-align:left;margin:8px 0;line-height:1.75}#planet-quiz p{font-size:14px}.planet-observe{position:absolute;bottom:100px;left:48%;right:6.5vw;background:#071121d9;border:1px solid #4c6b8b33;padding:16px 20px;border-radius:6px;backdrop-filter:blur(10px)}.planet-observe label{display:block;font-size:14px;line-height:1.8;color:#c2d9f4}.planet-observe input{width:100%;height:28px;accent-color:#a5caff;margin:12px 0}.planet-observe p{font-size:13px;line-height:1.8;margin:8px 0;color:#a1b9d9}.planet-observe small{font-size:11px;color:#7891b4}.planet-active .detail,.planet-active #object-caption{display:none!important}.energy-track{height:7px;background:#20344f;margin:12px 0}.energy-track span{display:block;height:100%;min-width:1px;background:#e5c07b}#planet-diagram{font-size:14px;line-height:1.9;color:#bbd2ed;margin:12px 0}
#solar-journey #journey-dots{position:absolute;left:6.5vw;right:6.5vw;top:155px;display:flex;gap:7px;flex-wrap:wrap;pointer-events:auto}#solar-journey #journey-dots button{width:auto;height:auto;min-height:40px;padding:8px 12px;background:#07172bba;border:1px solid #3c557b66;border-radius:4px;font-size:13px;color:#8ca9cf}#solar-journey #journey-dots button.current{color:#e1eeff;border-color:#98bbeb;background:#1b365599;box-shadow:none}.journey-intro{top:25vh}.journey-intro p{font-size:16px;line-height:1.9}.journey-intro h2{font-size:28px}.journey-bottom{max-height:28vh}#journey-prompt{font-size:14px}.journey-nav button{min-height:44px;font-size:14px}.journey-top button{min-height:44px;font-size:14px}.journey-top{font-size:13px}.journey-intro #journey-more{font-size:14px;min-height:40px}#journey-deeper{font-size:14px}.journey-action{font-size:14px;min-height:44px}.journey-answers button{font-size:14px}.journey-question{font-size:15px}#journey-feedback{font-size:14px}#nucleus{font-size:14px;min-height:44px;max-width:250px}.load-error button{display:block;padding:12px 20px;margin-top:15px;background:#254568;color:#d9e8ff;border-radius:4px;font-size:14px}
@media(max-width:750px){header{padding:22px 20px}.brand{font-size:16px}.brand small{font-size:7px}.top-actions button{font-size:12px;min-height:44px;padding:8px}.opening{top:112px;left:24px;max-width:280px}.opening h1{font-size:24px;line-height:1.5}.opening p{font-size:13px}.opening .eyebrow{font-size:11px}.marker{gap:5px;padding:8px;min-width:60px}.marker-text b{font-size:12px}.marker-text{padding:4px 6px}.reticle{width:18px;height:18px}.reticle:after{inset:5px}#planet-nav{bottom:74px;width:calc(100vw - 32px);max-width:none;display:grid;grid-template-columns:repeat(5,1fr);padding:4px;gap:0}#planet-nav button{font-size:13px;min-width:0;min-height:42px}#tap-hint{bottom:179px;font-size:13px;width:calc(100vw - 48px)}footer{left:20px;right:20px;bottom:17px}.location small{display:none}.gesture{display:none}.planet-top{top:87px;left:20px;right:20px;gap:8px;font-size:12px}#planet-explorer .planet-top button{font-size:13px;padding:7px 10px}.planet-intro{top:auto;bottom:88px;left:20px;right:20px;width:auto;max-height:40vh;overflow:auto;background:#071222f2;border:1px solid #55739240;border-radius:6px;padding:15px 17px;backdrop-filter:blur(12px)}.planet-intro h2{font-size:21px;line-height:1.55;margin:8px 0 10px}.planet-intro .eyebrow{font-size:12px}.planet-intro p{font-size:15px;line-height:1.95;margin:13px 0}#planet-explorer #planet-scenes button{font-size:13px;min-height:40px}.planet-observe{top:37vh;bottom:auto;left:20px;right:20px;max-height:15vh;overflow:auto;padding:10px 13px}.planet-observe label{font-size:12px}.planet-observe input{margin:4px 0;height:26px}.planet-observe p{font-size:12px;margin:3px 0}.planet-observe small{font-size:10px}#planet-diagram{font-size:12px;margin:6px 0}#solar-journey #journey-dots{top:140px;left:20px;right:20px;gap:4px}#solar-journey #journey-dots button{font-size:11px;min-height:38px;padding:6px 9px}.journey-top{top:85px;left:20px;right:20px;font-size:11px}.journey-top button{font-size:12px;min-height:44px}.journey-intro{top:auto;bottom:253px;left:20px;right:20px;width:auto;max-width:none;max-height:26vh;overflow:auto;pointer-events:auto;background:#071222ed;border:1px solid #55739233;padding:13px 15px;border-radius:5px}.journey-intro h2{font-size:21px;margin:6px 0 10px}.journey-intro p{font-size:15px;max-width:none}.journey-intro #journey-more{font-size:13px;min-height:40px}#journey-deeper{font-size:13px;max-height:180px}.journey-bottom{bottom:80px;left:20px;right:20px;max-height:165px;padding:11px 13px}#journey-prompt{font-size:13px}.journey-bottom label{font-size:12px;margin-top:7px}.journey-nav{margin-top:5px}.journey-nav button{font-size:12px;min-height:40px}.journey-nav button:last-child{max-width:230px}.journey-caption{top:36%;left:50%;font-size:11px;max-width:88vw}.nucleus{top:32%;left:50%;font-size:12px}.journey-action{font-size:13px;min-height:40px}.journey-question{font-size:14px}.journey-answers button{font-size:13px}#journey-feedback{font-size:13px}.journey-intro .eyebrow{font-size:11px;margin-bottom:7px}.journey-boundary{font-size:9px;line-height:1.6}.solar-active .opening{display:none}.solar-active .journey-bottom:has(.journey-answers){max-height:36vh}.solar-active:has(.journey-answers) .journey-intro{bottom:auto;top:225px;max-height:18vh}}

#earth-retry{pointer-events:auto;padding:10px 14px;border:1px solid #6a8db466;border-radius:4px;background:#132943;color:#d8e9ff;font-size:14px;margin-left:15px}.in-focus #home{pointer-events:auto}

.planet-observe small a{color:#89a7cc;text-decoration:none}.text-mode .opening{display:none}.text-mode #error{top:100px;left:20px;right:20px;transform:none;font-size:14px;line-height:1.8;padding:14px 18px;max-width:600px}.text-mode #planet-explorer{z-index:6}.text-mode .planet-observe{display:none}.text-mode .planet-intro{top:170px;bottom:80px;max-height:calc(100vh - 260px)}.text-mode #planet-nav{display:grid}.text-mode .planet-top{top:85px}.text-mode:has(#planet-explorer:not([hidden])) #error{display:none}

@media(max-width:750px){.planet-observe{top:36vh;max-height:12.5vh}}
/* Map labels and knowledge are separate from the camera gesture surface. */
#earth-map-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}#earth-explorer .map-label{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;min-height:44px;padding:8px 13px;font-size:14px;letter-spacing:.05em;border-radius:24px;background:#071326c2;border:1px solid #b7dfff44;box-shadow:0 3px 18px #0005;color:#e2efff;text-shadow:0 1px 3px #000;white-space:nowrap;touch-action:manipulation}#earth-explorer .map-label[hidden]{display:none}#earth-explorer .map-label:hover,#earth-explorer .map-label[aria-pressed=true]{background:#1a385be3;border-color:#a9d8ff;box-shadow:0 0 22px #8bcaff35}#map-breadcrumbs{display:flex;gap:4px;align-items:center;flex-wrap:wrap;margin-right:auto}#earth-explorer #map-breadcrumbs button{background:transparent;border:0;padding:6px 7px;min-height:40px;font-size:13px;color:#b9d8f8}#map-breadcrumbs button+button:before{content:'›';margin-right:12px;color:#7596bb}.earth-top{pointer-events:none}.earth-top button,#map-breadcrumbs{pointer-events:auto}#place-guide{z-index:2;top:15vh;max-height:72vh;width:360px}.place-heading h3{font-size:25px}.place-heading small{font-size:12px}#earth-explorer #place-fold{min-height:44px;min-width:44px;font-size:25px}#place-theme{font-size:15px}#place-content>p{font-size:15px;line-height:1.95}.place-task p{font-size:14px;line-height:1.9}.place-task small{font-size:12px}#earth-explorer .place-tabs button{font-size:13px;min-height:44px}#place-sources a{font-size:12px}#earth-explorer #place-enter{min-height:44px;font-size:14px;width:100%;border-color:#78b0e477;background:#17375e99}#place-children{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}.children-caption{width:100%;font-size:13px;color:#92b6df}#earth-explorer #place-children button{min-height:44px;font-size:13px;border-radius:22px}#earth-explorer .place-bottom button{min-height:44px;font-size:13px}.earth-hud{pointer-events:none}
@media(max-width:750px){#earth-explorer .earth-top{top:15px;left:12px;right:12px;gap:4px;flex-wrap:wrap}#map-breadcrumbs{order:3;width:100%;gap:0;max-height:88px;overflow:auto}#earth-explorer #map-breadcrumbs button{font-size:12px;padding:4px 5px}#map-breadcrumbs button+button:before{margin-right:6px}#earth-global{margin-left:auto}#earth-explorer .map-label{font-size:13px;padding:7px 10px}#place-guide{top:auto;bottom:65px;left:12px;right:12px;width:auto;max-height:47vh;padding:13px 16px;border-radius:15px}.place-heading h3{font-size:22px}.place-heading small{font-size:11px}#place-content>p{font-size:14px}#place-theme{font-size:14px}.place-task p{font-size:13px}#earth-explorer .place-tabs button{font-size:12px}.earth-hud{bottom:32px;left:15px;right:15px;font-size:9px;gap:10px;flex-wrap:wrap}#earth-status{display:none}}

.earth-active header,.earth-active footer,.earth-active .detail{visibility:hidden}.earth-active .shade{display:none}
#scale-guide{position:fixed;left:32px;bottom:115px;max-width:340px;padding:20px 22px;border:1px solid #92aec128;border-radius:22px;background:#06111cba;backdrop-filter:blur(16px);z-index:4;color:#c6d8e5}#scale-guide[hidden]{display:none}#scale-guide small{font-size:10px;letter-spacing:.12em;color:#9dbece}#scale-guide h3{font-weight:450;font-size:20px;line-height:1.5;margin:10px 0}#scale-guide p{font-size:13px;line-height:1.9;margin:0 0 10px}#sg-actions{display:flex;gap:8px;flex-wrap:wrap}#sg-actions button{border:1px solid #aecbd638;border-radius:20px;padding:8px 12px;background:#162332;color:#d4e6ee;font-size:11px}#sg-source{display:block;font-size:10px;color:#8099aa;margin-top:12px}#earth-map-labels [data-kind=poi]{border-color:#dfbb746e;color:#f8dcac;background:#182027d9}#planet-scenes{flex-wrap:wrap}#planet-scenes button{max-width:100%;font-size:12px}@media(max-width:750px){#scale-guide{left:14px;right:14px;bottom:133px;max-width:none;padding:12px 16px}#scale-guide h3{font-size:15px;margin:6px 0}#scale-guide p{font-size:11px;line-height:1.7;margin-bottom:8px}#scale-guide small{font-size:9px}#sg-source{margin-top:7px}#sg-actions button{padding:7px 11px}}
#earth-poi-status{position:absolute;bottom:70px;left:24px;max-width:calc(100% - 48px);border:1px solid #c4d8e533;border-radius:20px;background:#091622dd;padding:8px 14px;color:#b3cbdc;font-size:11px;z-index:6}#earth-poi-status[hidden]{display:none}@media(max-width:750px){#earth-poi-status{bottom:90px;left:14px;max-width:calc(100% - 28px);font-size:10px}}
/* Map hierarchy: quiet geographic names, small place pins, details on selection. */
#earth-explorer .map-label{min-height:36px;max-width:190px;overflow:hidden;text-overflow:ellipsis;padding:6px 11px;font-size:12px;letter-spacing:0;border:1px solid #b7dfff25;background:#091520b5;box-shadow:0 2px 8px #0003;border-radius:18px}#earth-explorer .map-label[data-kind=continent]{font-size:16px;background:#08131a88;border-color:transparent}#earth-explorer .map-label[data-kind=region],#earth-explorer .map-label[data-kind=city]{color:#ccdcea;background:#08131a8c;border-color:transparent}#earth-explorer .map-label[data-category=shop]{color:#f0d7a5;border-color:#d6b66b42}#earth-explorer .map-label[data-category=service]{color:#bbded9;border-color:#86c6bd42}#earth-explorer .map-label[data-category=landmark]{color:#e4dcc7;border-color:#c7b88342}#earth-explorer .map-label.map-dot{width:34px;min-width:34px;height:34px;padding:0;color:transparent;background:transparent;border:0;box-shadow:none;overflow:visible}#earth-explorer .map-dot:before{content:'';position:absolute;left:13px;top:13px;width:8px;height:8px;border-radius:50%;background:#adc8d8;box-shadow:0 0 0 3px #061321bb}#earth-explorer .map-dot[data-category=shop]:before{background:#e2bd77}#earth-explorer .map-dot[data-category=service]:before{background:#98d1c6}#earth-explorer .map-dot.map-cluster{color:#e2edf2;font-size:11px;background:#142938e6;border:1px solid #9cc9d34a;overflow:hidden}#earth-explorer .map-dot.map-cluster:before{display:none}#earth-explorer .map-label:focus-visible{outline:2px solid #bcdbe6;outline-offset:3px}#earth-explorer .map-label:hover{box-shadow:none}
#earth-place-filters{position:absolute;top:94px;left:22px;z-index:3;display:flex;gap:5px;padding:5px;background:#09131dbe;backdrop-filter:blur(10px);border:1px solid #abc3d420;border-radius:24px}#earth-place-filters[hidden]{display:none}#earth-explorer #earth-place-filters button{min-height:34px;font-size:11px;border:0;background:transparent;color:#9fb3c2;padding:6px 11px;border-radius:18px}#earth-explorer #earth-place-filters button[aria-pressed=true]{background:#30434f;color:#f0f6f9}#earth-explorer #earth-poi-status{border:0;box-shadow:none;background:#091622b8;border-radius:16px;padding:7px 12px;max-width:calc(100% - 48px);font-size:11px}#earth-explorer #earth-poi-status:disabled{opacity:1;color:#91a9b8;cursor:default}#earth-explorer #earth-poi-status[data-state=error]{border:1px solid #a4855940;color:#d6bb91}#earth-explorer:has(#place-guide:not([hidden])) #earth-poi-status{display:none}
#earth-explorer #place-guide{right:22px;top:155px;width:340px;max-height:calc(100vh - 250px);padding:18px 20px;border-radius:20px;border-color:#89adc32b;background:#09141fe8;box-shadow:0 16px 54px #0003}#earth-explorer .place-heading h3{font-size:22px;font-weight:500;letter-spacing:0}#earth-explorer .place-heading small{font-size:11px;color:#90b0c1}#earth-explorer #place-enter{width:auto;min-height:34px;font-size:11px;background:transparent;border:1px solid #8ba4b72b;border-radius:16px;margin-bottom:6px;padding:6px 11px}#earth-explorer #place-theme{font-size:13px;line-height:1.8;margin:12px 0;color:#b3c8d7}#earth-explorer #place-content>p{font-size:14px;line-height:1.9;margin:14px 0}#earth-explorer .place-task{margin:15px 0;border-color:#597d94}#earth-explorer .place-task p{font-size:12px;line-height:1.8}#earth-explorer .place-task small{font-size:10px}#earth-explorer .place-tabs button{font-size:12px;min-height:36px;padding:5px 9px}#place-source-details{margin-top:12px;color:#879fae;font-size:11px}#place-source-details summary{cursor:pointer;min-height:32px;display:flex;align-items:center;gap:8px}#place-source-details summary:before{content:'＋'}#place-source-details[open] summary:before{content:'−'}#place-sources{margin-top:6px}#place-source-details a{font-size:11px}#earth-explorer .place-is-cluster .place-tabs,#earth-explorer .place-is-cluster .place-bottom,#earth-explorer .place-is-cluster #place-source-details{display:none}#earth-explorer .place-is-cluster #place-children{flex-direction:column}#earth-explorer .place-is-cluster #place-children button{text-align:left;min-height:44px;border-radius:12px}#earth-explorer .children-caption{font-size:11px;margin:5px 0}#earth-explorer #place-children button{font-size:11px;min-height:36px;padding:6px 11px}.place-facts{margin:13px 0;font-size:13px;line-height:1.7}.place-facts>div{display:grid;grid-template-columns:74px 1fr;gap:12px;border-bottom:1px solid #93b0c218;padding:9px 0}.place-facts dt{color:#829dac;font-size:11px}.place-facts dd{margin:0;color:#d1e0e9;overflow-wrap:anywhere}#earth-explorer #place-content>.place-record-note{font-size:11px;color:#829cab;line-height:1.7}#earth-explorer .place-bottom{margin-top:15px;padding-top:10px}#earth-explorer .place-bottom button{font-size:11px;min-height:34px}#earth-explorer #map-breadcrumbs{flex-wrap:nowrap;overflow:auto;white-space:nowrap;scrollbar-width:none}#earth-explorer #map-breadcrumbs button{flex-shrink:0;font-size:12px;color:#b6cbd8}#earth-explorer .earth-hud{opacity:.65}#earth-explorer:has(#place-guide:not([hidden])) .earth-hud{opacity:.25}
@media(max-width:750px){#earth-place-filters{top:100px;left:12px;right:12px;width:max-content;max-width:calc(100% - 24px);overflow:auto;gap:2px;padding:4px;white-space:nowrap}#earth-explorer #earth-place-filters button{padding:6px 9px;min-height:36px;font-size:10px;flex-shrink:0}#earth-explorer .map-label{font-size:11px;min-height:34px;max-width:170px;padding:6px 10px}#earth-explorer .map-dot{min-height:40px;min-width:40px}#earth-explorer #place-guide{top:auto;bottom:50px;left:12px;right:12px;width:auto;max-height:49vh;padding:15px 17px;border-radius:20px}#earth-explorer .place-heading h3{font-size:21px}#earth-explorer .place-heading small{font-size:10px}#earth-explorer #place-content>p{font-size:13px;line-height:1.85}#earth-explorer #place-theme{font-size:12px;margin:10px 0}#earth-explorer #map-breadcrumbs{max-height:42px}#earth-explorer #earth-poi-status{bottom:64px;left:14px;font-size:10px}.place-facts{font-size:13px}.place-facts>div{grid-template-columns:68px 1fr;gap:10px}}

@media(max-width:750px){#earth-explorer .map-label.map-dot{width:40px;min-width:40px;height:40px;min-height:40px}#earth-explorer .map-dot:after{left:16px;top:16px}}

#earth-poi-credit{position:absolute;bottom:28px;right:10px;z-index:6;font:10px/1.4 sans-serif;color:#b5c3cf;background:#091321b8;padding:2px 5px;text-decoration:none}

#sg-topics{display:flex;gap:5px;flex-wrap:wrap;margin:10px 0}#sg-topics button{font-size:11px;line-height:1.5;padding:6px 8px;border:1px solid #7494b536;border-radius:12px;background:#08131cc9;color:#a3bbce}#sg-topics button[aria-pressed=true]{color:#e2f2ff;border-color:#9cbede8c;background:#193048}
.neptune-active .planet-intro,.neptune-active .planet-observe,.neptune-active #planet-voice{display:none!important}#neptune-lab{position:fixed;inset:0;z-index:5;pointer-events:none;color:#dceafa}#neptune-lab[hidden]{display:none}#neptune-lab header{position:absolute;left:6.5vw;top:170px}#neptune-lab header small{font-size:11px;color:#8dacc6;letter-spacing:2px}#neptune-lab h1{font-size:40px;font-weight:500;margin:10px 0}#neptune-lab header p{font-size:12px;color:#96b4cc}.nl-card{pointer-events:auto;position:absolute;left:6.5vw;top:310px;width:330px;max-height:calc(100vh - 400px);overflow:auto;padding:18px;border:1px solid #7fa9ca30;border-radius:20px;background:#081321e6;backdrop-filter:blur(15px)}.nl-card nav{display:flex;flex-wrap:wrap;gap:6px}.nl-card button{min-height:40px;border:1px solid #8dabc338;background:#102237;color:#bcd5ea;border-radius:12px;padding:7px 10px;font-size:12px}.nl-card button[aria-pressed=true]{color:#effaff;border-color:#87c6ed;background:#203f59}.nl-card h2{font-size:21px;font-weight:500;line-height:1.5;margin:18px 0 10px}.nl-card p{font-size:14px;line-height:1.8;color:#bbcede}.nl-actions{display:flex;gap:8px;margin:16px 0}.nl-card label{display:flex;justify-content:space-between;font-size:12px;color:#b7cedf}.nl-card input{width:100%;margin:15px 0;accent-color:#8fcbef;min-height:28px}.nl-counters{display:flex;gap:10px;flex-wrap:wrap;font-size:13px;color:#dceaf6}.nl-card small{display:block;font-size:10px;color:#8faac0;line-height:1.7;margin-top:12px}.nl-card a{display:inline-block;font-size:11px;color:#9bc8e7;margin-top:12px;text-decoration:none}#nl-distance svg{width:100%;height:auto}#nl-distance svg text{fill:#bcd5e8;font:11px sans-serif}.nl-card button:focus-visible{outline:2px solid #b9e2ff;outline-offset:3px}@media(max-width:750px){#neptune-lab header{top:145px;left:20px}#neptune-lab h1{font-size:27px;margin:5px 0}#neptune-lab header p{font-size:11px;margin:6px 0}.nl-card{top:auto;bottom:75px;left:12px;right:12px;width:auto;max-height:36vh;padding:13px 15px;border-radius:18px}.nl-card h2{font-size:18px;margin:12px 0 8px}.nl-card p{font-size:12px;margin:8px 0;line-height:1.7}.nl-card nav button{font-size:11px;min-height:40px}.nl-actions{margin:10px 0}.nl-card small{font-size:9px}}
#neptune-lab header{display:block;right:auto;bottom:auto;width:330px;height:auto;padding:0;background:none;border:none;backdrop-filter:none}#neptune-lab header h1{display:block;width:auto;white-space:nowrap}#neptune-lab header p{display:block;max-width:none;width:auto}@media(max-width:750px){#neptune-lab header{width:calc(100% - 40px);top:140px}}
/* Solar-system overview: controls stay outside the exploration canvas. */
#solar-clock{position:fixed;top:112px;left:32px;z-index:6;color:#c5d9e9}#solar-clock[hidden]{display:none}.sc-heading{display:flex;align-items:center;gap:13px;margin-bottom:10px}.sc-heading strong{font-size:20px;font-weight:500}.sc-heading span{font-size:11px;color:#91a9bc}.sc-controls{display:flex;align-items:center;gap:8px;padding:6px 8px;border:1px solid #7398b334;background:#081321d9;backdrop-filter:blur(12px);border-radius:12px}.sc-controls button,.sc-controls select,.sc-views button{min-height:38px;font:inherit;font-size:12px;color:#c4dded;padding:6px 10px;background:#15293b;border:1px solid #7597ad30;border-radius:8px}.sc-controls select{font-size:12px}.sc-controls output{font-size:12px;min-width:70px;text-align:center}.sc-views{display:flex;gap:8px;margin-top:10px}.sc-views button{background:#081321b5}.system-view #scale-guide{display:none}.system-view.show-guide #scale-guide{display:block}#sg-topics{display:flex;gap:4px;flex-wrap:wrap}.system-view .shade{background:linear-gradient(0deg,#030610aa,transparent 23%,transparent 80%,#03061060)}
@media(max-width:750px){#solar-clock{top:88px;left:16px;right:16px}.sc-heading{margin-bottom:7px;gap:8px}.sc-heading strong{font-size:16px}.sc-heading span{font-size:10px}.sc-controls{gap:4px;padding:4px}.sc-controls button,.sc-controls select{min-height:38px;padding:5px 7px;font-size:11px}.sc-controls output{min-width:55px;font-size:11px;flex:1}.sc-views{margin-top:6px}.sc-views button{min-height:32px;font-size:10px;padding:5px 8px}#scale-guide{bottom:176px;max-height:38vh;overflow:auto}#planet-nav{display:flex;overflow-x:auto;bottom:74px;white-space:nowrap;scrollbar-width:none;justify-content:flex-start}#planet-nav button{flex:0 0 auto;min-width:52px;font-size:12px;min-height:40px}.marker{min-width:40px;padding:4px;gap:2px}.marker-text b{font-size:11px}.reticle{width:12px;height:12px}.marker-text{padding:2px 4px}}
#markers .marker{width:44px;height:44px;min-width:44px;min-height:44px;padding:0;display:grid;place-items:center;transform:translate(-50%,-50%)}#markers .marker-text{position:absolute;white-space:nowrap;pointer-events:auto}#markers .reticle{pointer-events:none}
#scale-guide{display:none}body.show-guide #scale-guide{display:block}
.planet-card-heading{display:flex;gap:12px;align-items:center;justify-content:space-between}.planet-card-heading h3{font-size:20px;font-weight:500;margin:0}.planet-card-heading button{border:1px solid #8cacc447;border-radius:10px;padding:8px 12px;min-height:40px;font-size:12px;background:#102338}#planet-explorer #planet-brief{font-size:13px;line-height:1.8;margin:10px 0 0}.planet-intro[data-expanded=false] #planet-detail-body{display:none}#planet-explorer:not(.details-open) .planet-observe{display:none}.planet-intro{max-height:60vh;overflow:auto;background:#071222e8;border:1px solid #55739240;border-radius:18px;padding:18px}.planet-intro[data-expanded=false]{max-width:330px}.planet-intro[data-expanded=true] #planet-brief{display:none!important}
@media(max-width:750px){.planet-intro[data-expanded=false]{max-width:none;max-height:155px;left:12px;right:12px;bottom:82px;padding:12px 14px}.planet-card-heading h3{font-size:16px}.planet-card-heading button{font-size:11px;min-height:36px}.planet-intro[data-expanded=true]{max-height:43vh;bottom:82px}.planet-active:not(.neptune-active) #planet-voice{display:none}.planet-active:not(.neptune-active) .planet-top:after{content:'拖动旋转 · 双指缩放 · 点击查看';color:#91abc1;font-size:10px;margin-left:auto}#planet-explorer #planet-brief{font-size:12px;line-height:1.7;margin-top:8px}.planet-observe{top:24vh;max-height:15vh}}
#sun-entry{position:fixed;left:6.5vw;top:270px;width:310px;padding:18px;background:#071422e8;border:1px solid #729db937;border-radius:18px;pointer-events:auto}#sun-entry p{font-size:13px;line-height:1.8;color:#b7ccdd}#sun-entry button{border:1px solid #8cacc447;border-radius:10px;padding:8px 12px;min-height:40px;font-size:12px;background:#102338}#sun-entry small{display:block;font-size:10px;color:#8ea9bd;margin-top:12px}#solar-journey[data-expanded=true] #sun-entry{display:none}#solar-journey[data-expanded=false] .journey-intro,#solar-journey[data-expanded=false] .journey-bottom,#solar-journey[data-expanded=false] #journey-dots,#solar-journey[data-expanded=false] #journey-audio,#solar-journey[data-expanded=false] #sun-fold,#solar-journey[data-expanded=false] #journey-caption{display:none}#solar-journey[data-expanded=false] .journey-top{justify-content:flex-start;gap:12px}
@media(max-width:750px){#sun-entry{top:auto;left:12px;right:12px;bottom:82px;width:auto;padding:12px 14px}#sun-entry p{font-size:12px;margin:8px 0;line-height:1.7}#sun-entry small{display:none}#sun-entry button{font-size:11px;min-height:36px}#solar-journey[data-expanded=true] .journey-top{font-size:10px;gap:5px}#solar-journey[data-expanded=true] .journey-top button{font-size:10px;padding:5px;min-height:36px}}

#spatial-explorer{position:fixed;inset:0;z-index:100;background:#040810}#spatial-explorer iframe{display:block;width:100%;height:100%;border:0}body.spatial-active>#universe,body.spatial-active>.shade,body.spatial-active>header,body.spatial-active>footer,body.spatial-active>#planet-nav,body.spatial-active>#solar-clock,body.spatial-active>#scale-guide{visibility:hidden}
/* Homepage v18: observation area stays open; controls share the lower edge. */
#planet-nav{left:32px;right:32px;bottom:82px;transform:none;width:auto;max-width:none;display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:4px;overflow:visible;padding:5px 8px}#planet-nav button{width:100%;min-width:0;min-height:42px;font-size:13px;text-align:center}
#solar-clock{top:auto;left:32px;right:auto;bottom:155px;width:365px;max-width:calc(100vw - 64px)}.sc-heading{margin-bottom:7px;gap:10px}.sc-heading strong{font-size:15px}.sc-heading span{font-size:10px}.sc-controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(55px,80px) auto;gap:6px;width:100%;min-width:0;padding:6px}.sc-controls select{min-width:0;width:100%;max-width:100%;padding:6px;font-size:11px}.sc-controls output{min-width:0;max-width:100%;font-size:11px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sc-buttons{display:flex;gap:4px;min-width:0}.sc-controls .sc-buttons button{min-width:42px;padding:6px 8px;font-size:11px}.sc-views{gap:6px;margin-top:7px}.sc-views button{min-height:32px;font-size:11px;padding:6px 10px}
#scale-guide{top:auto;left:auto;right:32px;bottom:155px;width:360px;max-width:calc(100vw - 64px);max-height:min(52vh,500px);overflow:auto;border-radius:12px;padding:15px 17px}#scale-guide h3{font-size:17px;line-height:1.55;margin:8px 0 12px}#scale-guide #sg-text p{font-size:12px;line-height:1.85;margin:0 0 10px}.sg-head{display:flex;align-items:center;justify-content:space-between;gap:8px}#sg-close{font-size:10px;color:#9bb6c8;min-height:26px;padding:3px 5px}#sg-model{display:block;font-size:10px;line-height:1.6;color:#8098aa;margin-top:10px}#sg-topics{margin:0 0 12px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:5px}#sg-topics button{font-size:10px;padding:6px 4px;border-radius:6px}#sg-source{margin-top:8px}
@media(max-width:750px){#planet-nav{left:16px;right:16px;bottom:74px;width:auto;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;overflow:visible;padding:3px}#planet-nav button{min-width:0;min-height:38px;font-size:12px}#solar-clock{top:auto;left:16px;right:16px;bottom:169px;width:auto;max-width:none}.sc-controls{grid-template-columns:minmax(0,1fr) minmax(52px,74px) auto;gap:4px;padding:5px}.sc-controls .sc-buttons button{min-width:40px;padding:5px 7px;min-height:36px}.sc-controls select{min-height:36px}.sc-heading{margin-bottom:5px}.sc-heading strong{font-size:13px}.sc-heading span{font-size:9px}.sc-views{margin-top:5px}.sc-views button{min-height:30px;font-size:10px}#scale-guide{left:16px;right:16px;bottom:302px;width:auto;max-width:none;max-height:40vh;padding:12px 14px}#scale-guide h3{font-size:15px}#scale-guide #sg-text p{font-size:11px;line-height:1.75}.gesture{display:none}}
@media(min-width:751px) and (max-width:850px){#scale-guide{bottom:285px;width:330px}}
@media(max-width:750px){#scale-guide{max-height:min(40vh,calc(100dvh - 390px))}}

/* v19: inset chevron instead of the native select indicator. */
.sc-controls select{appearance:none;-webkit-appearance:none;padding-right:32px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23bdd5e6' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:12px 8px}

#earth-seabed{font-size:11px;min-height:30px;padding:5px 10px;border:1px solid #8fa9c14a;border-radius:7px;background:#101e2ad9;white-space:nowrap}#earth-image-note{font-size:10px;color:#9db1c2}
@media(max-width:750px){#earth-image-note{grid-column:1/-1;font-size:9px}#earth-seabed{font-size:10px;padding:4px 8px}}
#earth-explorer #earth-seabed{pointer-events:auto}

/* v23: compact title rows and source links on the final note line. */
#scale-guide .sg-head{align-items:flex-start;gap:12px}#scale-guide .sg-head h3{flex:1;min-width:0;margin:0;font-size:16px;line-height:1.5}#sg-close{flex:none;white-space:nowrap}#scale-guide{max-height:38vh;padding:13px 15px}#sg-topics{margin:10px 0}#scale-guide #sg-text p{margin-bottom:7px;line-height:1.7}.sg-foot{display:flex;align-items:flex-end;gap:10px;margin-top:8px}#sg-model{flex:1;margin:0;letter-spacing:0}#sg-source{flex:none;display:inline;margin:0;white-space:nowrap}
#spatial-explorer{background:transparent;opacity:0;transition:opacity .45s ease;pointer-events:none}#spatial-explorer.revealed{opacity:1;pointer-events:auto}body.spatial-active>#universe{visibility:visible}body.spatial-active>.shade{visibility:hidden}
@media(max-width:750px){#scale-guide{top:100px;bottom:auto;max-height:28vh;padding:10px 12px}#scale-guide .sg-head h3{font-size:14px}#scale-guide #sg-text p{line-height:1.65}#sg-model{font-size:9px}#sg-source{font-size:9px}}
@media(prefers-reduced-motion:reduce){#spatial-explorer{transition-duration:.1s}}

body.show-guide #scale-guide,body.system-view.show-guide #scale-guide{display:flex;flex-direction:column;overflow:hidden}#scale-guide>.sg-head,#scale-guide>#sg-topics,#scale-guide>#sg-actions,#scale-guide>.sg-foot{flex-shrink:0}#sg-text{min-height:0;overflow:auto;overscroll-behavior:contain}
@media(max-width:750px){#sg-topics{display:flex;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:thin;margin:6px 0;gap:5px}#sg-topics button{flex:none;white-space:nowrap;padding:5px 8px}#scale-guide #sg-text p{margin-bottom:6px}#sg-actions{margin-top:5px}#sg-actions button{padding:6px 9px}.sg-foot{margin-top:6px}}
#earth-explorer .place-bottom{position:relative;display:flex;align-items:flex-end;gap:8px}#earth-explorer .place-bottom #place-source-details{margin:0 0 0 auto;flex:none}#earth-explorer #place-source-details summary{min-height:28px;font-size:10px}#earth-explorer #place-sources{position:absolute;right:0;bottom:34px;width:250px;max-width:90%;padding:12px;background:#081321;border:1px solid #7897aa55;border-radius:9px;z-index:6}#earth-explorer #place-source-details:not([open]) #place-sources{display:none}