:root{--panel-bg: rgba(24, 24, 26, .88);--panel-border: rgba(255, 255, 255, .1);--chip-bg: rgba(0, 0, 0, .45);--chip-border: rgba(255, 255, 255, .16);--accent: #ff6b00;--accent-text: #1a1206;--text: #fff;--text-dim: rgba(255, 255, 255, .55);--radius: 12px;--font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}#root{width:100%;height:100%}.viewer-root{position:relative;width:100%;height:100%;font-family:var(--font)}canvas{display:block;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}button{font-family:inherit}.loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#000;color:var(--text);font-family:var(--font);z-index:100}.loading-overlay .loading-logo{width:min(260px,52vw);height:auto;margin-bottom:44px;opacity:.92}.loading-overlay .spinner{width:36px;height:36px;border:3px solid rgba(255,255,255,.18);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-bottom:16px}@keyframes spin{to{transform:rotate(360deg)}}.loading-overlay .progress-text{font-size:14px;opacity:.7}.loading-overlay .progress-bar{width:min(260px,62vw);height:3px;margin-top:16px;border-radius:2px;background:#ffffff26;overflow:hidden}.loading-overlay .progress-bar-fill{height:100%;background:#fff;transition:width .2s ease-out}.loading-overlay .progress-detail{margin-top:10px;font-size:12px;opacity:.5;font-variant-numeric:tabular-nums}.error-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#000;color:var(--text);font-family:var(--font);z-index:100;gap:12px;padding:24px;text-align:center}.error-overlay .error-hint{font-size:13px;color:var(--text-dim)}.error-overlay button{margin-top:8px;padding:10px 24px;border:1px solid rgba(255,255,255,.3);background:transparent;color:var(--text);border-radius:8px;cursor:pointer;font-size:14px}.error-overlay button:hover{background:#ffffff1a}.top-bar{position:absolute;left:max(16px,env(safe-area-inset-left));top:max(16px,env(safe-area-inset-top));display:flex;gap:10px;z-index:40}.icon-btn{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border:1px solid var(--chip-border);border-radius:var(--radius);background:var(--chip-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#ffffffd9;cursor:pointer;transition:background .15s,color .15s}.icon-btn:hover{background:#000000a6;color:var(--text)}.icon-btn.is-active{background:var(--accent);border-color:transparent;color:var(--accent-text)}.settings-panel{position:absolute;left:0;top:52px;width:250px;padding:16px;border:1px solid var(--panel-border);border-radius:14px;background:var(--panel-bg);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);color:var(--text);box-shadow:0 12px 36px #00000080}.settings-section-label{font-size:13px;font-weight:600;margin-bottom:14px}.settings-divider{height:1px;margin:16px 0;background:var(--panel-border)}.quality-track{display:flex;align-items:flex-start;justify-content:space-between;position:relative}.quality-track:before{content:"";position:absolute;left:14%;right:14%;top:6px;height:2px;background:#ffffff29}.quality-stop{display:flex;flex-direction:column;align-items:center;gap:8px;flex:1;padding:0;border:none;background:none;color:var(--text-dim);font-size:11px;cursor:pointer;position:relative}.quality-dot{width:14px;height:14px;border-radius:50%;background:#ffffff4d;transition:background .15s,transform .15s}.quality-stop:hover .quality-dot{background:#ffffff8c}.quality-stop.is-active{color:var(--text)}.quality-stop.is-active .quality-dot{background:#fff;transform:scale(1.15)}.settings-note{margin:14px 0 0;font-size:11px;line-height:1.5;color:#ffcf6b}.settings-toggle-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}.settings-toggle-label{font-size:13px}.settings-toggle-hint{margin-top:3px;font-size:11px;color:var(--text-dim)}.switch{flex-shrink:0;width:40px;height:23px;padding:0;border:none;border-radius:12px;background:#ffffff38;cursor:pointer;transition:background .18s}.switch.is-on{background:var(--accent)}.switch-knob{display:block;width:19px;height:19px;margin-left:2px;border-radius:50%;background:#fff;transition:transform .18s}.switch.is-on .switch-knob{transform:translate(17px)}.segmented{display:flex;padding:3px;border-radius:9px;background:#ffffff14}.segment{flex:1;padding:7px 4px;border:none;border-radius:7px;background:none;color:var(--text-dim);font-size:12px;cursor:pointer;transition:background .15s,color .15s}.segment.is-active{background:var(--accent);color:var(--accent-text)}.settings-stat{display:flex;justify-content:space-between;margin-top:16px;padding-top:12px;border-top:1px solid var(--panel-border);font-size:11px;color:var(--text-dim);font-variant-numeric:tabular-nums}.settings-stat .stat-warn{color:#ff8b6b}.modal-scrim{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:#00000059;z-index:60;padding:20px}.controls-panel{width:min(860px,100%);max-height:84vh;overflow-y:auto;padding:22px 26px 26px;border:1px solid var(--panel-border);border-radius:18px;background:var(--panel-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);color:var(--text);box-shadow:0 20px 60px #0000008c}.controls-panel-head{display:flex;align-items:center;gap:16px;margin-bottom:22px}.controls-panel-title{font-size:16px;font-weight:600}.controls-panel-actions{display:flex;align-items:center;gap:10px;margin-left:auto}.esc-hint{font-size:11px;color:var(--text-dim)}.ghost-btn{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:none;border-radius:8px;background:none;color:var(--text-dim);cursor:pointer}.ghost-btn:hover{background:#ffffff1a;color:var(--text)}.tab-group{display:flex;padding:4px;border-radius:10px;background:#ffffff14}.tab{padding:7px 18px;border:none;border-radius:7px;background:none;color:var(--text-dim);font-size:13px;cursor:pointer;transition:background .15s,color .15s;white-space:nowrap}.tab.is-active{background:#fff;color:#111;font-weight:500}.controls-columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:26px}.controls-column h4{margin:0 0 14px;font-size:13px;font-weight:600;color:var(--text-dim)}.controls-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:7px 0;font-size:13px}.controls-row kbd{padding:4px 10px;border-radius:6px;background:#0000008c;border:1px solid var(--panel-border);font-family:var(--font);font-size:11px;white-space:nowrap}.gesture-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}.gesture-card{padding:16px 14px;border-radius:12px;background:#ffffff0f;text-align:center}.gesture-title{font-size:13px;font-weight:600;margin-bottom:8px}.gesture-hint{font-size:11px;line-height:1.5;color:var(--text-dim)}.toolbar-root{position:absolute;left:50%;transform:translate(-50%);bottom:max(18px,env(safe-area-inset-bottom));z-index:40}.toolbar{display:flex;align-items:center;gap:4px;padding:6px;border:1px solid var(--chip-border);border-radius:14px;background:var(--chip-bg);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.tool-btn{display:flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 10px;border:none;border-radius:10px;background:none;color:#fffc;cursor:pointer;transition:background .15s,color .15s}.tool-btn:hover{background:#ffffff1f;color:var(--text)}.tool-btn.is-active{background:var(--accent);color:var(--accent-text)}.tool-btn.is-text{font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}.mode-menu{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);display:flex;flex-direction:column;gap:2px;padding:6px;border:1px solid var(--panel-border);border-radius:12px;background:var(--panel-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:0 10px 30px #00000073}.mode-menu.is-side{bottom:auto;left:auto;right:calc(100% + 8px);top:0;transform:none}.mode-menu-item{display:flex;align-items:center;gap:10px;padding:9px 14px 9px 10px;border:none;border-radius:8px;background:none;color:#ffffffc7;font-size:13px;cursor:pointer;white-space:nowrap;transition:background .15s,color .15s}.mode-menu-item:hover{background:#ffffff1a;color:var(--text)}.mode-menu-item.is-active{background:var(--accent);color:var(--accent-text)}.sidebar-root{position:absolute;right:0;top:50%;transform:translateY(-50%);z-index:40}.sidebar{display:flex;flex-direction:column;gap:2px;padding:8px 4px;border-radius:14px 0 0 14px;background:#0000006b;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.side-btn{display:flex;flex-direction:column;align-items:center;gap:4px;width:66px;padding:10px 4px;border:none;border-radius:10px;background:none;color:#ffffffc7;font-size:10px;line-height:1.2;cursor:pointer;transition:background .15s,color .15s}.side-btn:active,.side-btn.is-active{background:#ffffff29;color:var(--text)}.side-btn-text{font-size:15px;font-weight:600;height:20px;font-variant-numeric:tabular-nums}.height-slider{position:absolute;right:96px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;align-items:center;gap:14px;padding:16px 12px;border:1px solid var(--panel-border);border-radius:14px;background:var(--panel-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);color:var(--text);z-index:45}.height-slider-value{font-size:12px;font-variant-numeric:tabular-nums}.height-slider input[type=range]{writing-mode:vertical-lr;direction:rtl;width:22px;height:180px;accent-color:var(--accent);cursor:pointer}.height-slider-reset{padding:5px 12px;border:1px solid var(--panel-border);border-radius:7px;background:none;color:var(--text-dim);font-size:11px;cursor:pointer}.height-slider-reset:hover{background:#ffffff1a;color:var(--text)}.joystick-zone{position:absolute;left:0;bottom:0;width:40%;height:65%;z-index:15;touch-action:none}.joystick-base{position:fixed;transform:translate(-50%,-50%);border:2px solid rgba(255,255,255,.28);border-radius:50%;background:#ffffff0f;display:flex;align-items:center;justify-content:center;transition:opacity .15s;pointer-events:none}.joystick-knob{border-radius:50%;background:#ffffff8c;box-shadow:0 2px 10px #00000059}.touch-actions{position:absolute;right:max(20px,env(safe-area-inset-right));bottom:calc(max(20px,env(safe-area-inset-bottom)) + 12px);display:flex;flex-direction:column;gap:10px;z-index:25}.touch-btn{display:flex;align-items:center;justify-content:center;width:54px;height:54px;border:1px solid var(--chip-border);border-radius:50%;background:var(--chip-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#ffffffd9;cursor:pointer;touch-action:none;transition:transform .1s,background .1s}.touch-btn:active{transform:scale(.92);background:#ffffff40}.brand-watermark{position:absolute;right:max(20px,env(safe-area-inset-right));bottom:max(14px,env(safe-area-inset-bottom));z-index:10;pointer-events:none}.brand-watermark img{width:116px;height:auto;opacity:.6;filter:drop-shadow(0 1px 3px rgba(0,0,0,.6))}@media(max-width:600px){.controls-panel{padding:18px 16px 20px}.controls-panel-head{flex-wrap:wrap;gap:12px}.tab{padding:7px 12px;font-size:12px}.height-slider{right:auto;left:max(16px,env(safe-area-inset-left));top:46%}.height-slider input[type=range]{height:140px}}