:root{--bg-dark:#0a0c10;--glass-bg:#101622b8;--glass-border:#ffffff1f;--glass-hover:#ffffff2e;--gold-accent:#f59e0b;--cyan-accent:#06b6d4;--yangtze-color:#d97706;--jialing-color:#0d9488;--text-main:#f3f4f6;--text-muted:#9ca3af;--radius-md:12px;--radius-lg:18px;--shadow-panel:0 20px 40px -15px #000000b3, 0 0 0 1px #ffffff14}body.light-theme{--bg-dark:#d8eafd;--glass-bg:#ffffffd1;--glass-border:#0000001a;--glass-hover:#0000000d;--text-main:#0f172a;--text-muted:#475569;--shadow-panel:0 20px 40px -15px #0f172a26, 0 0 0 1px #0000000f}body.light-theme .brand h1{background:linear-gradient(#0f172a 30%,#334155 100%);-webkit-text-fill-color:transparent;text-shadow:none;-webkit-background-clip:text}body.light-theme .cam-btn{background:#00000008}body.light-theme .cam-btn:hover{background:#00000012}body.light-theme .info-badge{background:#ffffffa6;border:1px solid #00000014}body.light-theme .slider{background-color:#00000026}*{box-sizing:border-box;-webkit-user-select:none;user-select:none;-webkit-font-smoothing:antialiased;margin:0;padding:0}body,html{background-color:var(--bg-dark);width:100%;height:100%;color:var(--text-main);font-family:Noto Sans SC,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;overflow:hidden}#canvas-container{z-index:1;width:100%;height:100%;position:absolute;top:0;left:0}#canvas-container canvas{touch-action:none;display:block}.hint-row{color:var(--text-muted);background:#ffffff0a;border:1px dashed #ffffff1a;border-radius:8px;margin-top:2px;padding:6px 10px;font-size:11px}body.light-theme .hint-row{background:#00000008;border-color:#00000014}.ui-header{z-index:10;pointer-events:none;justify-content:space-between;align-items:center;display:flex;position:absolute;top:24px;left:32px;right:32px}.brand{pointer-events:auto}.brand-badge{letter-spacing:2.5px;color:#fbbf24;background:linear-gradient(135deg,#f59e0b40,#06b6d440);border:1px solid #f59e0b66;border-radius:20px;margin-bottom:6px;padding:3px 10px;font-family:Cinzel,serif;font-size:10px;font-weight:800;display:inline-block}.brand h1{letter-spacing:1px;background:linear-gradient(#fff 30%,#e2e8f0 100%);-webkit-text-fill-color:transparent;text-shadow:0 4px 12px #0009;-webkit-background-clip:text;font-size:28px;font-weight:700}.sub-title{letter-spacing:2px;color:var(--text-muted);margin-top:2px;font-family:Cinzel,serif;font-size:11px;display:block}.env-switcher{background:var(--glass-bg);border:1px solid var(--glass-border);box-shadow:var(--shadow-panel);pointer-events:auto;border-radius:40px;gap:8px;padding:6px;display:flex}.env-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:30px;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .25s;display:flex}.env-btn:hover{color:#fff;background:var(--glass-hover)}.env-btn.active{color:#000;background:linear-gradient(135deg,#f59e0b,#d97706);font-weight:600;box-shadow:0 4px 14px #f59e0b59}.camera-nav{z-index:10;background:var(--glass-bg);border-radius:var(--radius-lg);border:1px solid var(--glass-border);box-shadow:var(--shadow-panel);flex-direction:column;gap:10px;width:230px;max-height:calc(100vh - 154px);padding:18px 14px;display:flex;position:absolute;top:130px;left:32px}.model-sources{font-size:11px;line-height:1.7}.model-sources summary{cursor:pointer;color:var(--cyan-accent)}.model-sources a{color:var(--text-muted);margin-top:8px;display:block}.model-sources p{color:var(--text-muted);margin-top:10px}.map-attribution{z-index:10;color:var(--text-main);background:var(--glass-bg);border-radius:6px;padding:4px 8px;font-size:10px;position:absolute;bottom:8px;left:12px}.nav-title{letter-spacing:1.5px;color:var(--gold-accent);margin-bottom:4px;padding-left:6px;font-family:Cinzel,serif;font-size:11px;font-weight:700}.cam-btn{border-radius:var(--radius-md);color:var(--text-main);text-align:left;cursor:pointer;background:#ffffff08;border:1px solid #0000;align-items:center;gap:12px;padding:10px 12px;transition:all .25s cubic-bezier(.16,1,.3,1);display:flex}.cam-btn .num{color:var(--text-muted);width:20px;font-family:Cinzel,monospace;font-size:13px;font-weight:700}.cam-btn .cam-text .name{font-size:13px;font-weight:600}.cam-btn .cam-text .desc{color:var(--text-muted);margin-top:1px;font-size:10px}.cam-btn:hover{background:var(--glass-hover);border-color:#ffffff26;transform:translate(3px)}.cam-btn.active{background:linear-gradient(135deg,#f59e0b2e,#06b6d41f);border-color:#f59e0b80;box-shadow:0 4px 12px #f59e0b26}.cam-btn.active .num{color:var(--gold-accent)}.cam-btn.active .cam-text .name{color:var(--text-main)}.control-panel{background:var(--glass-bg);border-radius:var(--radius-lg);border:1px solid var(--glass-border);width:320px;box-shadow:var(--shadow-panel);z-index:10;flex-direction:column;gap:16px;padding:20px;display:flex;position:absolute;top:130px;right:32px}.panel-section{flex-direction:column;gap:10px;display:flex}.sidebar-toggle{border-radius:var(--radius-md);min-height:36px;color:var(--gold-accent);font:inherit;cursor:pointer;white-space:nowrap;background:0 0;border:0;justify-content:space-between;align-items:center;padding:6px 10px;font-size:13px;font-weight:700;display:flex}.control-panel .sidebar-toggle{color:var(--cyan-accent)}.sidebar-toggle:hover{background:var(--glass-hover)}.sidebar-toggle:focus-visible{outline:2px solid var(--gold-accent);outline-offset:2px}.sidebar-content{gap:inherit;flex-direction:column;min-height:0;display:flex;overflow-y:auto}.control-panel .sidebar-content,.control-panel .panel-section{scrollbar-width:none;-ms-overflow-style:none}.control-panel .sidebar-content::-webkit-scrollbar{display:none}.control-panel .panel-section::-webkit-scrollbar{display:none}.control-panel{max-height:calc(100vh - 154px)}#photo-layer{z-index:2;pointer-events:none;position:absolute;inset:0;overflow:hidden}#photo-layer[hidden]{display:none}#photo-preview{pointer-events:auto;cursor:grab;touch-action:none;width:26%;height:auto;position:absolute;top:70%;left:50%;transform:translate(-50%,-50%)}#photo-preview:active{cursor:grabbing}#photo-preview:focus-visible{outline:2px solid var(--cyan-accent);outline-offset:3px}.photo-panel{display:block}.photo-panel summary{cursor:pointer}.photo-panel>:not(summary){margin-top:10px}.photo-label{font-size:12px;display:block}.photo-panel input,.photo-panel select{width:100%;accent-color:var(--cyan-accent)}.photo-panel select,.photo-panel>button,.photo-actions button{border:1px solid var(--glass-border);background:var(--bg-dark);color:var(--text-main);font:inherit;border-radius:8px;padding:8px;font-size:12px}.photo-panel>button{cursor:pointer;width:100%}.photo-actions{gap:8px;display:flex}.photo-actions button{cursor:pointer;flex:1}.photo-actions button:disabled{opacity:.45;cursor:default}.photo-help{color:var(--text-muted);font-size:11px;line-height:1.7}#photo-page{--text-main:#26343d;--text-muted:#65717b;--bg-dark:#fffdf8;--glass-border:#dcd8d0;width:100vw;max-width:none;height:100dvh;max-height:none;color:var(--text-main);background:#eeeae2;border:0;margin:0;padding:0;overflow:auto}.photo-page-shell{max-width:1500px;margin:0 auto;padding:32px}.photo-page-header{justify-content:space-between;align-items:center;gap:20px;margin-bottom:32px;display:flex}.photo-eyebrow{color:#8b7250;letter-spacing:2px;margin-bottom:8px;font-size:11px}#photo-close{color:#26343d;font:inherit;cursor:pointer;background:#fffdf8;border:1px solid #cdc6ba;border-radius:24px;padding:12px 18px}.photo-workspace{grid-template-columns:minmax(0,1fr) 280px;align-items:start;gap:36px;display:grid}.photo-frame{background:#fffdf7;padding:16px;box-shadow:0 16px 48px #30271a20}#photo-stage{background:#d8eafd;position:relative;overflow:hidden}#photo-background{width:100%;height:auto;display:block}.photo-frame-caption{flex-direction:column;gap:6px;padding:20px 4px 8px;display:flex}.photo-frame-caption strong{letter-spacing:3px;color:#26343d;font-size:18px}.photo-frame-caption span{color:#8b7250;font-size:12px}.photo-editor{background:#ffffffa8;border:1px solid #dcd8d0;border-radius:16px;padding:24px}@media (width<=800px){.photo-page-shell{padding:18px}.photo-page-header h2{font-size:21px}.photo-workspace{grid-template-columns:1fr;gap:24px}}.sidebar-content[hidden]{display:none}.camera-nav.is-collapsed,.control-panel.is-collapsed{width:auto;padding:8px}.section-title{letter-spacing:.5px;color:var(--cyan-accent);border-bottom:1px solid #ffffff14;padding-bottom:6px;font-size:12px;font-weight:700}.control-row{color:var(--text-main);justify-content:space-between;align-items:center;font-size:13px;display:flex}.toggle-switch{width:40px;height:22px;display:inline-block;position:relative}.toggle-switch input{opacity:0;width:0;height:0}.slider{cursor:pointer;background-color:#ffffff26;border:1px solid #ffffff1a;border-radius:22px;transition:all .3s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:16px;height:16px;transition:all .3s;position:absolute;bottom:2px;left:2px}input:checked+.slider{background-color:var(--gold-accent)}input:checked+.slider:before{transform:translate(18px)}.info-badge{border-radius:var(--radius-md);background:#00000059;border:1px solid #ffffff0f;padding:12px}.geo-tag{color:var(--gold-accent);margin-bottom:6px;font-size:11px;font-weight:600}.geo-desc{color:var(--text-muted);font-size:11px;line-height:1.6}.plinth-plaque{z-index:10;pointer-events:none;position:absolute;bottom:24px;left:50%;transform:translate(-50%)}.plaque-inner{text-align:center;background:linear-gradient(#2a251b 0%,#15130f 100%);border:1px solid #785a28;border-radius:6px;padding:10px 28px;box-shadow:0 10px 25px #000c,inset 0 1px 1px #ffd7784d}.plaque-title{letter-spacing:4px;color:#dfb15b;text-shadow:0 1px 2px #000000e6;font-family:Cinzel,serif;font-size:14px;font-weight:800}.plaque-sub{letter-spacing:2px;color:#a3895e;margin-top:3px;font-family:Cinzel,serif;font-size:9px}#landmark-tooltip{z-index:100;border:1px solid var(--gold-accent);pointer-events:none;background:#0e121ce0;border-radius:10px;max-width:240px;padding:12px 16px;transition:opacity .2s,transform .2s;position:absolute;transform:translate(-50%,-120%);box-shadow:0 12px 30px #000000b3}#landmark-tooltip.hidden{opacity:0;transform:translate(-50%,-110%)}.tooltip-badge{letter-spacing:1.5px;color:var(--cyan-accent);margin-bottom:2px;font-family:Cinzel,serif;font-size:9px}#tooltip-title{color:#fff;margin-bottom:4px;font-size:15px;font-weight:700}#tooltip-content{color:#cbd5e1;font-size:12px;line-height:1.5}#loading-screen{z-index:9999;background:#080a0f;justify-content:center;align-items:center;width:100%;height:100%;transition:opacity .8s,visibility .8s;display:flex;position:fixed;top:0;left:0}#loading-screen.fade-out{opacity:0;visibility:hidden}.loader-content{text-align:center;max-width:360px}.spinner{border:3px solid #f59e0b26;border-top-color:var(--gold-accent);border-radius:50%;width:48px;height:48px;margin:0 auto 20px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.loader-content h2{letter-spacing:1px;color:#fff;margin-bottom:8px;font-size:18px;font-weight:600}.loader-status{color:var(--text-muted);margin-bottom:20px;font-size:12px}.progress-bar{background:#ffffff1a;border-radius:4px;width:100%;height:4px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--gold-accent), var(--cyan-accent));width:0%;height:100%;transition:width .3s}body.nav-active .plinth-plaque{opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;transform:translate(-50%,12px)}body.nav-active .camera-nav{opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;transform:translate(-16px)}body.nav-active #landmark-tooltip{display:none}.nav-lede{color:var(--text-muted);font-size:11px;line-height:1.65}.nav-cards{grid-template-columns:1fr 1fr;gap:8px;display:grid}.nav-card{border-radius:var(--radius-md);color:var(--text-main);text-align:left;font:inherit;cursor:pointer;background:#ffffff0a;border:1px solid #ffffff17;flex-direction:column;align-items:flex-start;gap:2px;padding:10px 11px 11px;transition:transform .25s cubic-bezier(.16,1,.3,1),border-color .25s,background .25s;display:flex}.nav-card:hover{background:var(--glass-hover);border-color:#f59e0b73;transform:translateY(-2px)}.nav-card.active{background:linear-gradient(150deg,#f59e0b38,#22d3ee1a);border-color:#f59e0bd9}.nav-card-tag{letter-spacing:1.2px;color:var(--gold-accent);font-size:9px;font-weight:700}.nav-card-name{letter-spacing:.5px;font-size:15px;font-weight:700}.nav-card-meta{color:var(--text-muted);font-size:10px;line-height:1.55}.nav-live{border-top:1px solid #ffffff1a;flex-direction:column;gap:7px;padding-top:12px;display:flex}.nav-live[hidden],.nav-live.is-browse>:not(.nav-actions),.nav-live.is-browse #nav-play{display:none}.nav-live-head{flex-direction:column;gap:1px;padding-right:48px;display:flex;position:relative}.nav-floor-now{color:#fcd34d;letter-spacing:.5px;font-variant-numeric:tabular-nums;background:#f59e0b29;border:1px solid #f59e0b99;border-radius:999px;padding:3px 9px;font-size:12px;font-style:normal;font-weight:700;position:absolute;top:0;right:0}.nav-floor-now[hidden]{display:none}.nav-live-head strong{letter-spacing:.5px;font-size:14px}.nav-live-head span{color:var(--text-muted);font-size:10px}.nav-cue{color:var(--text-main);background:#22d3ee1f;border-left:2px solid #22d3ee;border-radius:8px;padding:7px 10px;font-size:12px;font-weight:600}.nav-stats-label{letter-spacing:1.4px;text-transform:uppercase;color:var(--text-muted);opacity:.75;font-size:9px}.nav-stats{grid-template-columns:repeat(3,1fr);gap:6px;display:grid}.nav-stats dt{letter-spacing:.4px;color:var(--text-muted);font-size:9px}.nav-stats dd{font-variant-numeric:tabular-nums;color:var(--text-main);font-size:13px;font-weight:700}.nav-chart{color:var(--text-muted);background:#0000002e;border-radius:8px;padding:2px 4px 0}.nav-chart svg{width:100%;height:auto;display:block}.nav-axis{fill:currentColor;font-family:Cinzel,monospace;font-size:8px}.nav-legend{color:var(--text-muted);gap:12px;font-size:10px;display:flex}.nav-legend span{align-items:center;gap:5px;display:flex}.nav-legend i{background:var(--dot);border-radius:50%;width:7px;height:7px}.nav-floors{grid-template-columns:repeat(6,1fr);gap:4px;display:grid}.nav-floors[hidden]{display:none}.nav-floors button{border:1px solid var(--glass-border);color:var(--text-muted);font:inherit;cursor:pointer;background:0 0;border-radius:6px;padding:4px 0;font-size:10px;font-weight:600;transition:all .2s}.nav-floors button:hover{color:var(--text-main);border-color:#f59e0b80}.nav-floors button.active{background:var(--gold-accent);border-color:var(--gold-accent);color:#1a1206}.nav-progress{background:#ffffff24;border-radius:3px;height:3px;overflow:hidden}.nav-progress span{background:linear-gradient(90deg, var(--gold-accent), var(--cyan-accent));width:0;height:100%;transition:width .12s linear;display:block}.nav-actions{gap:8px;display:flex}.nav-btn{border:1px solid var(--glass-border);color:var(--text-main);font:inherit;cursor:pointer;background:0 0;border-radius:8px;flex:1;padding:7px 0;font-size:12px;transition:all .2s}.nav-btn:hover{background:var(--glass-hover)}.nav-btn-primary{color:#1a1206;background:linear-gradient(135deg,#f59e0b,#d97706);border-color:#0000;font-weight:700}.nav-btn-primary:hover{filter:brightness(1.08)}.nav-note{color:var(--text-muted);font-size:9.5px;line-height:1.55}.nav-card-wide{grid-column:1/-1}.nav-hud{z-index:12;border:1px solid var(--glass-border);background:var(--glass-bg);box-shadow:var(--shadow-panel);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:12px;align-items:center;gap:12px;padding:10px 14px;display:flex;position:absolute;bottom:46px;left:24px;right:340px}.nav-hud[hidden]{display:none}.nav-hud-head{flex-direction:column;gap:1px;min-width:0;display:flex}.nav-hud-head strong{letter-spacing:.4px;font-size:12px}.nav-hud-head span{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:10px;overflow:hidden}.nav-hud-bar{background:#ffffff24;border-radius:4px;flex:1;min-width:60px;height:4px;overflow:hidden}.nav-hud-bar span{background:linear-gradient(90deg, var(--gold-accent), var(--cyan-accent));width:0;height:100%;transition:width .12s linear;display:block}.nav-hud-remaining{color:var(--text-muted);font-variant-numeric:tabular-nums;white-space:nowrap;font-size:10px}.nav-hud-actions{gap:6px;display:flex}.nav-hud-actions button{border:1px solid var(--glass-border);color:var(--text-main);font:inherit;white-space:nowrap;cursor:pointer;background:0 0;border-radius:7px;padding:6px 10px;font-size:11px}.nav-hud-actions button:hover{background:var(--glass-hover)}.nav-hud-actions #nav-hud-play{color:#1a1206;background:linear-gradient(135deg,#f59e0b,#d97706);border-color:#0000;font-weight:700}body.nav-playing .control-panel{opacity:0;pointer-events:none;border-color:#0000;width:0;padding:0;transition:width .25s,padding .25s,opacity .25s;overflow:hidden}body.nav-playing.nav-panel-peek .control-panel{border-color:var(--glass-border);opacity:1;pointer-events:auto;width:320px;padding:20px;overflow:visible}body.nav-playing .nav-hud{right:24px}.nav-detail{z-index:12;border:1px solid var(--glass-border);background:var(--glass-bg);color:var(--text-main);font:inherit;cursor:pointer;border-radius:999px;padding:6px 12px;font-size:11px;transition:transform .25s,background .2s;position:absolute;top:130px;right:32px}.nav-detail[hidden]{display:none}.nav-detail:hover{background:var(--glass-hover)}body.nav-playing.nav-panel-peek .nav-detail{transform:translate(-344px)}body.nav-playing .nav-card{pointer-events:none;opacity:.5}body.nav-playing .nav-lede,body.nav-playing .nav-note{display:none}@media (width<=800px){.nav-hud{flex-wrap:wrap;bottom:12px;left:12px;right:12px}}body.light-theme .nav-card{background:#0f172a09;border-color:#0f172a1a}body.light-theme .nav-card.active{background:linear-gradient(150deg,#f59e0b33,#06b6d41a)}body.light-theme .nav-cue{background:#06b6d41a}body.light-theme .nav-chart{background:#0f172a0d}body.light-theme .nav-progress{background:#0f172a24}