@charset "UTF-8";
:root{--paper:#f5f1e5;--ink:#203f35;--rust:#a65336;--line:rgba(32,63,53,.17);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#d2dbc8;font-synthesis:none}*{box-sizing:border-box}body{margin:0;overflow:hidden;width:100%;height:100%;overscroll-behavior:none}button,a,input,select{-webkit-tap-highlight-color:transparent}button,input,select{font:inherit}button{cursor:pointer;color:inherit}button:disabled{cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #bd7746;outline-offset:4px}button{border:0}a{color:inherit}button:disabled{opacity:.7}[hidden]{display:none!important}#viewport,#viewport canvas{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none}.masthead{position:fixed;z-index:15;top:30px;left:40px;right:40px;display:flex;justify-content:space-between;align-items:center;pointer-events:none;gap:16px;color:var(--paper)}.wordmark{display:flex;align-items:center;font:600 32px Georgia,"Times New Roman",serif;letter-spacing:-1.5px;text-decoration:none;pointer-events:auto}.wordmark span{font-weight:400}.wordmark i{width:1px;height:24px;background:currentColor;opacity:.4;margin:0 20px}.wordmark small{font:500 12px sans-serif;letter-spacing:4px}.header-right{display:flex;align-items:center;gap:12px}.edition{font-size:9px;letter-spacing:2px;text-align:right;line-height:1.9}.edition b{display:block;font-weight:400;letter-spacing:4px}.paper-button{pointer-events:auto;background:var(--paper);color:var(--ink);font-size:12px;padding:11px 16px;border-radius:2px}.paper-button kbd{margin-left:12px;font:10px monospace;opacity:.5}.paper-button span{margin-left:9px}.in-world{display:none}body.started .masthead{color:var(--ink)}body.started .wordmark{background:rgba(245,241,229,.93);padding:10px 17px;border-radius:2px;font-size:26px;box-shadow:0 3px 20px #233c2910}body.started .edition{display:none}body.started .in-world{display:block}.intro{position:fixed;inset:0;z-index:10;background:#214437;color:var(--paper);transition:opacity .75s,visibility .75s}.intro.leaving{opacity:0;visibility:hidden;pointer-events:none}.intro-image{position:absolute;width:100%;height:100%;object-fit:cover;object-position:53% 48%;filter:saturate(.78);opacity:.85}.intro-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(9,33,25,.76),rgba(10,37,28,.18) 70%),linear-gradient(0deg,rgba(11,35,27,.8),transparent 65%,rgba(9,29,24,.32))}.intro-copy{position:absolute;left:7.5vw;bottom:16vh}.eyebrow{font-size:9px;letter-spacing:2.2px;font-weight:500;margin:0;text-transform:uppercase}.intro h1{font-family:"Songti SC","Noto Serif CJK SC","SimSun",serif;font-weight:400;font-size:clamp(54px,6.5vw,104px);letter-spacing:6px;line-height:1.2;margin:30px 0 22px;text-shadow:0 2px 22px #12331f22}.intro h1 span{color:#c5b886}.intro-sub{font-size:13px;font-weight:300;letter-spacing:2px;line-height:2.1;margin:0 0 28px;opacity:.88}.enter{width:238px;display:flex;align-items:center;justify-content:space-between;background:var(--paper);padding:19px 24px;color:var(--ink);font-size:13px;letter-spacing:2px;transition:background .2s,transform .2s}.enter:hover:not(:disabled){background:#fff9e9;transform:translateY(-2px)}.enter-arrow{font-size:25px;font-weight:300}.loading-line{width:238px;height:2px;margin-top:7px;background:#f5f1e533}.loading-line span{display:block;height:100%;width:0;background:#ddbc83;transition:width .3s}.load-status{font-size:9px;letter-spacing:1px;margin:9px 0 0;opacity:.66}.intro-note{position:absolute;right:6.5vw;bottom:18vh;background:rgba(245,241,229,.95);color:var(--ink);padding:28px 32px;width:260px;transform:rotate(-2deg);box-shadow:0 10px 50px #0c291e20}.note-number{font:8px monospace;letter-spacing:1px}.intro-note p{font:400 26px/1.7 "Songti SC","SimSun",serif;margin:22px 0}.note-rule{width:34px;height:1px;background:var(--rust);margin:22px 0}.intro-note>span:last-of-type{font-size:11px;letter-spacing:1px}.intro-note small{display:block;font-size:9px;opacity:.6;margin-top:12px}.intro-footer{position:absolute;bottom:28px;left:40px;right:40px;display:flex;align-items:center;justify-content:space-between;font-size:9px;letter-spacing:2px;gap:20px;opacity:.7}.intro-footer:before{content:"";position:absolute;left:0;right:0;top:-20px;height:1px;background:#f5f1e533}.hud{position:fixed;inset:0;z-index:5;pointer-events:none}.reticle{position:absolute;left:50%;top:50%;width:4px;height:4px;border-radius:50%;background:rgba(255,253,239,.85);box-shadow:0 0 0 1px #203f3555,0 0 6px #132e2844;transform:translate(-50%,-50%)}.location-paper{position:absolute;bottom:65px;left:40px;background:rgba(245,241,229,.94);padding:21px 28px 18px;min-width:180px;border-left:2px solid var(--rust);box-shadow:0 6px 25px #253c2a0c}.location-paper .eyebrow{font-size:8px;letter-spacing:2px;opacity:.6}.location-paper h2{font:400 24px/1.5 "Songti SC","SimSun",serif;margin:8px 0}.location-paper p{font-size:10px;letter-spacing:1px;margin:4px 0 0;opacity:.6}.location-paper i{display:inline-block;width:2px;height:2px;background:currentColor;margin:0 10px;vertical-align:middle}.walk-hint{position:absolute;bottom:24px;left:40px;font-size:10px;letter-spacing:1px;color:var(--ink);background:rgba(245,241,229,.86);padding:8px 12px;border-radius:2px}.walk-hint i{font-style:normal;opacity:.5;margin:0 10px}.inspect{position:absolute;bottom:86px;left:50%;transform:translateX(-50%);pointer-events:auto;display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--paper);font-size:12px;white-space:nowrap;box-shadow:0 5px 30px #18382b17}.inspect small{font:10px monospace;opacity:.6}.inspect kbd{border:1px solid var(--line);padding:3px 5px;font:9px monospace}.inspect>span:last-child{color:var(--rust);font-size:10px}.minimap-paper{position:absolute;right:40px;bottom:26px;width:184px;background:var(--paper);box-shadow:0 5px 25px #253c2a18;padding:8px;pointer-events:auto}.minimap-paper button{padding:0;width:100%;background:none}.minimap-paper canvas{width:100%;display:block}.minimap-paper span{display:flex;justify-content:space-between;font-size:9px;letter-spacing:2px;border-top:1px solid var(--line);padding:8px 4px 1px}.minimap-paper b{font-weight:400;color:var(--rust)}dialog{border:0;padding:30px 34px;background:var(--paper);color:var(--ink);box-shadow:0 20px 100px #0c2a2533;max-height:calc(100dvh - 48px);overflow-y:auto;border-radius:2px;width:460px;max-width:calc(100vw - 32px)}dialog::backdrop{background:rgba(18,44,35,.38);backdrop-filter:blur(7px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:20px}.dialog-top .eyebrow{color:var(--rust);font-size:8px}.close-icon{background:none;font-size:25px;font-weight:300;padding:0 4px;line-height:1;width:32px;height:32px}.pause-dialog h2,.about-dialog h2,.poi-dialog h2{font:400 39px/1.4 "Songti SC","SimSun",serif;margin:10px 0 14px}.muted{font-size:11px;line-height:1.9;opacity:.65}.solid-button{width:100%;display:flex;justify-content:space-between;align-items:center;padding:17px 21px;margin:23px 0;background:var(--ink);color:var(--paper);letter-spacing:1px;font-size:12px}.solid-button span{font-size:20px}.settings{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:26px;padding:5px 0}.settings label{display:flex;align-items:center;justify-content:space-between;min-height:43px;font-size:11px}.settings select{font-size:11px;border:1px solid var(--line);color:var(--ink);background:transparent;padding:5px 7px;border-radius:0}.settings input[type=range]{width:120px;accent-color:var(--ink)}.settings input[type=checkbox]{accent-color:var(--ink);width:15px;height:15px}.pause-actions{display:flex;justify-content:space-between;margin-top:18px}.pause-actions button{font-size:10px;padding:8px 0;background:none}.control-note{border-top:1px solid var(--line);margin:18px 0 0;padding-top:16px;font-size:10px;line-height:2.1;opacity:.5}.map-dialog{width:900px}.map-dialog h2{font:400 32px "Songti SC","SimSun",serif;margin:0 0 20px}.map-dialog h2 span{font:11px sans-serif;margin-left:20px;opacity:.6}.map-content{display:grid;grid-template-columns:1fr 240px;gap:28px}.map-canvas-wrap{min-width:0}.map-canvas-wrap canvas{display:block;width:100%;aspect-ratio:1;background:#e9e7d8}.map-canvas-wrap p{font-size:9px;letter-spacing:1px;opacity:.6}.map-destinations>p{margin-top:0}.map-destinations>small{font-size:9px;line-height:1.9;opacity:.5;display:block;margin-top:18px}#destinationList button{display:flex;text-align:left;align-items:center;justify-content:space-between;background:none;padding:14px 2px;border-bottom:1px solid var(--line);width:100%;font-size:12px}#destinationList button b{font:9px monospace;color:var(--rust);margin-right:9px}#destinationList button small{font:10px monospace;opacity:.5}#destinationList button:hover{color:var(--rust)}.poi-dialog{width:430px}.poi-index{font:italic 65px Georgia,serif;color:#b58b6355;display:block;margin-bottom:4px}.poi-dialog h2{font-size:33px;margin:0}.poi-english{font:italic 16px Georgia,serif;opacity:.6;margin-top:8px}.poi-dialog>p:not(.poi-english){font-size:13px;line-height:2.2;letter-spacing:.3px}.poi-dialog>small{display:block;font-size:9px}.poi-dialog .solid-button{margin-bottom:0}.about-dialog{width:560px}.about-dialog h2{font-size:30px}.about-dialog>p{font-size:12px;line-height:2.1}.source-links{display:grid;gap:12px;font-size:11px;margin:24px 0}.toast{position:fixed;z-index:40;left:50%;top:105px;transform:translateX(-50%);max-width:calc(100vw - 32px);padding:12px 20px;background:var(--paper);font-size:12px;box-shadow:0 5px 30px #173e3522;pointer-events:none;text-align:center}.error-panel{position:fixed;z-index:100;left:50%;top:50%;transform:translate(-50%,-50%);background:var(--paper);padding:40px;width:450px;max-width:calc(100vw - 32px);box-shadow:0 15px 100px #173e3555}.error-panel h2{font:30px "Songti SC",serif}.error-panel p{font-size:13px;line-height:2}.error-panel a{font-size:12px}.touch-controls{position:absolute;inset:0;pointer-events:none}.joystick{position:absolute;width:120px;height:120px;left:28px;bottom:max(35px,env(safe-area-inset-bottom));border:1px solid #f5f1e5a0;border-radius:50%;background:#f5f1e530;pointer-events:auto;touch-action:none}.joystick:after{content:"";position:absolute;inset:24px;border:1px solid #f5f1e555;border-radius:50%}.stick{position:absolute;left:39px;top:39px;width:40px;height:40px;background:#f5f1e5bb;border:1px solid #ffffffa0;border-radius:50%;z-index:1;box-shadow:0 4px 12px #173e3522;pointer-events:none}.joystick small{position:absolute;bottom:-22px;width:100%;text-align:center;font-size:9px;color:var(--paper);text-shadow:0 1px 4px #173e35}.joystick-north{position:absolute;left:50%;transform:translateX(-50%);top:5px;font-size:14px;color:var(--paper)}.look-hint{position:absolute;bottom:62px;right:25px;color:var(--paper);text-align:center;text-shadow:0 1px 4px #173e35}.look-hint span{display:block;border:1px solid #f5f1e570;border-radius:50%;width:64px;height:64px;margin:0 auto 12px;line-height:62px;font-size:24px;background:#f5f1e512}.look-hint small{font-size:9px;letter-spacing:1px}.run-button{position:absolute;left:54px;bottom:180px;background:var(--paper);font-size:11px;padding:9px 20px;border-radius:20px;pointer-events:auto;touch-action:manipulation}.run-button[aria-pressed=true]{background:var(--ink);color:var(--paper)}
@media(max-width:800px){.masthead{top:max(20px,env(safe-area-inset-top));left:20px;right:20px}.wordmark{font-size:27px}.wordmark small{font-size:10px;letter-spacing:2px}.wordmark i{margin:0 14px}.edition{font-size:7px}.intro-copy{left:8vw;bottom:20vh}.intro h1{font-size:64px}.intro-note{width:200px;right:5vw;bottom:22vh;padding:23px;transform:rotate(-2deg)}.intro-note p{font-size:23px}.intro-footer{left:24px;right:24px;font-size:8px}.intro-footer>span:nth-child(2){display:none}.map-content{grid-template-columns:1fr 200px;gap:16px}.location-paper{left:20px;bottom:58px;padding:16px 20px}.minimap-paper{right:20px;width:150px}.walk-hint{left:20px;font-size:9px}.inspect{bottom:220px}.paper-button{padding:11px 12px}.paper-button kbd{display:none}}
@media(max-width:560px){.intro h1{font-size:60px;letter-spacing:3px;margin-top:26px}.intro-copy{bottom:22vh;left:8vw}.intro-sub{font-size:12px;line-height:2;margin-bottom:22px}.intro-note{display:none}.intro-footer{bottom:25px}.intro-footer .prototype{font-size:8px;letter-spacing:1px}.intro-image{object-position:57% center}.intro-shade{background:linear-gradient(0deg,rgba(10,35,25,.94),rgba(10,35,25,.35) 75%,rgba(10,35,25,.4))}.enter{width:220px;padding:17px 22px}.loading-line{width:220px}.edition{display:none}.eyebrow{font-size:8px}body.started .wordmark{font-size:23px;padding:8px 12px}body.started .wordmark small,body.started .wordmark i{display:none}.header-right{gap:7px}.paper-button{font-size:11px;padding:10px 12px}.masthead{left:16px;right:16px}.location-paper{left:17px;bottom:230px;min-width:0;padding:12px 17px}.location-paper h2{font-size:21px;margin:4px 0}.location-paper .eyebrow{font-size:7px}.location-paper p{font-size:8px}.minimap-paper{right:16px;top:83px;bottom:auto;width:112px;padding:5px}.minimap-paper span{font-size:8px;letter-spacing:1px;padding:6px 1px 1px}.walk-hint{display:none}.inspect{bottom:222px;left:auto;right:17px;transform:none;max-width:calc(100vw - 180px);padding:11px 13px;gap:6px;flex-wrap:wrap;font-size:11px}.inspect>span:last-child{width:100%;font-size:9px}.inspect kbd{display:none}.inspect small{font-size:9px}.map-dialog{padding:24px 20px;max-height:calc(100dvh - 32px)}.map-dialog h2{font-size:27px}.map-dialog h2 span{display:block;font-size:10px;margin:10px 0 0}.map-content{grid-template-columns:1fr}.map-canvas-wrap canvas{max-height:38dvh;width:100%;object-fit:contain}.map-destinations>p{font-size:10px}.map-destinations>small{font-size:8px}#destinationList{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}#destinationList button{font-size:10px;padding:13px 0}#destinationList button small{font-size:8px}dialog{padding:24px;max-height:calc(100dvh - 32px)}.pause-dialog h2{font-size:34px}.settings label{font-size:11px}.control-note{font-size:9px}.toast{top:84px;font-size:11px}.look-hint{right:20px;bottom:55px}}
@media(max-height:600px) and (min-width:561px){.intro-copy{bottom:16vh}.intro h1{font-size:54px;margin:15px 0}.intro-sub{font-size:11px;line-height:1.8;margin-bottom:12px}.intro-note{bottom:16vh;padding:20px}.intro-note p{font-size:22px;margin:15px 0}.masthead{top:18px}.intro-footer{bottom:16px}.location-paper{bottom:49px;padding:12px 20px}.walk-hint{bottom:15px}.minimap-paper{width:132px;bottom:17px}.inspect{bottom:55px}.map-canvas-wrap canvas{max-height:60vh;object-fit:contain}}
body.touch .walk-hint{display:none}body.touch .location-paper{bottom:230px}body.touch .inspect{bottom:230px}body.touch .minimap-paper{top:90px;bottom:auto}body.touch .inspect kbd{display:none}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;scroll-behavior:auto!important}}
/* Indoor field note: deliberately quiet, away from the view and movement controls. */
.indoor-status{position:absolute;top:112px;left:40px;padding:15px 18px;background:rgba(245,241,229,.94);border-top:2px solid #a65336;max-width:300px;box-shadow:0 4px 20px #173e3515}.indoor-status span{display:block;font:8px monospace;letter-spacing:2px;color:#a65336;margin-bottom:7px}.indoor-status b{display:block;font:400 18px "Songti SC","SimSun",serif}.indoor-status small{display:block;font-size:8px;letter-spacing:.5px;margin-top:9px;opacity:.6}.about-dialog>.source-links+a,.about-dialog>.source-links+a+a,.about-dialog>.source-links+a+a+a{display:block;font-size:11px;margin:15px 0}.poi-dialog #poiEnterClassroom{margin-bottom:8px}.poi-dialog #poiEnterClassroom:not([hidden])+.solid-button{background:transparent;color:#203f35;border:1px solid #203f3533;margin-top:8px}
@media(max-width:560px){.indoor-status{left:16px;top:86px;max-width:calc(100vw - 150px);padding:12px}.indoor-status b{font-size:15px}.indoor-status small{font-size:8px;line-height:1.6}.indoor-status span{font-size:7px}#classroomButton{padding:10px 9px}.header-right{gap:5px}.header-right .paper-button span{margin-left:5px}.about-dialog>.source-links+a,.about-dialog>.source-links+a+a,.about-dialog>.source-links+a+a+a{line-height:1.8}}