:root{color-scheme:light;--ink:#182019;--muted:#677069;--paper:#d8d5cb;--glass:rgba(238,235,226,.86);--line:rgba(28,37,30,.18);--accent:#936d4c;--danger:#a14a39}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Noto Serif SC","Songti SC","Microsoft YaHei",serif}
button{font:inherit}
button:focus-visible,canvas:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.lcc-viewer{position:relative;width:100%;height:100%;overflow:hidden;isolation:isolate;background:radial-gradient(circle at 50% 42%,#e9e5db,#c6c5bd 68%,#b5b6b0)}
#sceneCanvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:0}
.topbar{position:absolute;z-index:20;top:18px;left:20px;right:20px;height:66px;display:grid;grid-template-columns:minmax(180px,1fr) auto minmax(180px,1fr);align-items:stretch;border:1px solid var(--line);background:var(--glass);box-shadow:0 16px 50px rgba(28,33,29,.12);backdrop-filter:blur(18px);transition:opacity .3s,transform .3s}
.viewer-brand{display:flex;align-items:center;gap:12px;padding:0 17px;min-width:0}
.viewer-brand b,.viewer-brand small{display:block;white-space:nowrap}.viewer-brand b{font-size:13px;font-weight:500;letter-spacing:.04em}.viewer-brand small{margin-top:4px;color:#747b75;font:7px monospace;letter-spacing:.15em}
.brand-orbit{position:relative;width:25px;height:25px;flex:0 0 auto;border:1px solid var(--accent);border-radius:50%}.brand-orbit:before,.brand-orbit:after,.brand-orbit i{content:"";position:absolute;border:1px solid rgba(147,109,76,.55);border-radius:50%}.brand-orbit:before{inset:5px -3px;transform:rotate(28deg)}.brand-orbit:after{inset:-3px 7px;transform:rotate(-22deg)}.brand-orbit i{inset:10px;background:var(--accent);border:0}
.scene-tabs{display:flex;border-left:1px solid var(--line);border-right:1px solid var(--line)}
.scene-tabs button{position:relative;min-width:118px;padding:0 17px;display:flex;align-items:center;justify-content:center;gap:9px;border:0;border-right:1px solid var(--line);background:transparent;color:#6e756f;cursor:pointer;transition:.25s}.scene-tabs button:last-child{border-right:0}.scene-tabs button:hover{color:var(--ink);background:rgba(255,255,255,.32)}.scene-tabs button.is-active{color:#241b15;background:rgba(147,109,76,.13);box-shadow:inset 0 -2px var(--accent)}.scene-tabs button:disabled{opacity:.45;cursor:wait}.scene-tabs i{color:var(--accent);font:8px monospace;font-style:normal}.scene-tabs span{font-size:12px;white-space:nowrap}
.viewer-tools{justify-self:end;display:flex;height:100%}.viewer-tools button{min-width:54px;padding:0 13px;border:0;border-left:1px solid var(--line);background:transparent;color:#59625b;cursor:pointer}.viewer-tools button:hover{background:rgba(255,255,255,.35);color:var(--ink)}#qualityButton{display:flex;align-items:center;gap:8px;min-width:110px}#qualityButton b{font-size:10px;font-weight:400;white-space:nowrap}.quality-dot{width:7px;height:7px;border-radius:50%;background:#779b79;box-shadow:0 0 0 4px rgba(119,155,121,.13)}
.reticle{position:absolute;z-index:7;left:50%;top:50%;width:19px;height:19px;transform:translate(-50%,-50%);pointer-events:none;opacity:.5}.reticle:before,.reticle:after,.reticle i:before,.reticle i:after{content:"";position:absolute;background:rgba(30,39,32,.6)}.reticle:before{left:9px;top:0;width:1px;height:6px}.reticle:after{left:9px;bottom:0;width:1px;height:6px}.reticle i:before{left:0;top:9px;width:6px;height:1px}.reticle i:after{right:0;top:9px;width:6px;height:1px}
.load-panel{position:absolute;z-index:16;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:rgba(216,213,203,.94);backdrop-filter:blur(16px);transition:opacity .55s,visibility .55s}.lcc-viewer:not(.is-loading) .load-panel{opacity:0;visibility:hidden;pointer-events:none}.load-emblem{position:relative;width:92px;height:92px;margin-bottom:28px}.load-emblem i{position:absolute;inset:0;border:1px solid rgba(147,109,76,.35);border-radius:50%;animation:orbit 3.2s linear infinite}.load-emblem i:nth-child(2){inset:13px -10px;animation-duration:4.4s;animation-direction:reverse}.load-emblem i:nth-child(3){inset:29px;background:var(--accent);border:0;animation:pulse 1.7s ease-in-out infinite}.load-panel small{color:var(--accent);font:8px monospace;letter-spacing:.28em}.load-panel h1{margin:13px 0 25px;font-size:clamp(27px,4vw,44px);font-weight:400}.load-track{width:min(320px,65vw);height:1px;background:rgba(25,34,27,.18)}.load-track i{display:block;width:0;height:100%;background:var(--accent);transition:width .2s}.load-panel p{margin:12px 0 0;color:var(--muted);font:8px monospace;letter-spacing:.14em}
.error-panel{position:absolute;z-index:25;left:50%;top:50%;width:min(500px,calc(100% - 40px));padding:35px;transform:translate(-50%,-50%);border:1px solid rgba(161,74,57,.35);background:rgba(239,235,225,.96);box-shadow:0 28px 80px rgba(29,24,21,.22);text-align:center;backdrop-filter:blur(18px)}.error-panel small{color:var(--danger);font:8px monospace;letter-spacing:.2em}.error-panel h2{margin:14px 0 12px;font-size:30px;font-weight:400}.error-panel p{margin:0;color:#6b6d67;font-size:12px;line-height:1.8}.error-panel>div{margin-top:25px;display:flex;justify-content:center;gap:8px}.error-panel button{padding:11px 17px;border:1px solid var(--line);background:transparent;color:var(--ink);font-size:10px;cursor:pointer}.error-panel button:first-child{border-color:var(--accent);background:var(--accent);color:#fff}
.performance-notice{position:absolute;z-index:18;top:101px;right:20px;padding:10px 11px 10px 14px;display:flex;align-items:center;gap:13px;border:1px solid var(--line);background:var(--glass);box-shadow:0 12px 35px rgba(30,35,31,.13);backdrop-filter:blur(16px)}.performance-notice span{font-size:10px;color:#5f6761}.performance-notice button{padding:7px 10px;border:1px solid var(--accent);background:transparent;color:var(--accent);font-size:9px;cursor:pointer}
.scene-dock{position:absolute;z-index:15;left:20px;right:20px;bottom:18px;min-height:94px;display:grid;grid-template-columns:minmax(265px,1fr) auto minmax(265px,1fr);align-items:center;border:1px solid var(--line);background:var(--glass);box-shadow:0 16px 50px rgba(28,33,29,.13);backdrop-filter:blur(18px);transition:opacity .3s,transform .3s}.scene-caption{padding:14px 18px;min-width:0}.scene-caption small{color:var(--accent);font:7px monospace;letter-spacing:.17em}.scene-caption h2{margin:7px 0 5px;font-size:18px;font-weight:400}.scene-caption p{max-width:470px;margin:0;overflow:hidden;color:#6d746e;font-size:10px;line-height:1.55;white-space:nowrap;text-overflow:ellipsis}
.control-legend{padding:0 22px;display:grid;grid-template-columns:1fr 1fr;gap:9px 20px;border-left:1px solid var(--line);border-right:1px solid var(--line)}.control-legend span{color:#69716b;font-size:9px;white-space:nowrap}.control-legend kbd{display:inline-block;min-width:49px;margin-right:7px;padding:4px 6px;border:1px solid rgba(37,47,39,.2);background:rgba(255,255,255,.34);color:#3c463f;font:7px monospace;text-align:center}
.scene-actions{justify-self:end;height:100%;display:flex}.scene-actions button{min-width:78px;padding:11px;border:0;border-left:1px solid var(--line);background:transparent;color:#656d67;cursor:pointer}.scene-actions button:hover,.scene-actions button.is-active{color:var(--accent);background:rgba(147,109,76,.08)}.scene-actions i,.scene-actions span{display:block}.scene-actions i{margin-bottom:7px;font-style:normal;font-size:14px}.scene-actions span{font-size:9px;white-space:nowrap}
.first-visit{position:absolute;z-index:19;left:50%;top:calc(50% + 74px);display:flex;align-items:center;gap:14px;padding:8px 9px 8px 14px;transform:translateX(-50%);border:1px solid var(--line);background:rgba(244,241,233,.9);box-shadow:0 12px 35px rgba(28,33,29,.12);backdrop-filter:blur(12px);transition:.35s}.first-visit.is-dismissed{opacity:0;visibility:hidden;transform:translate(-50%,8px)}.first-visit span{color:#5e6760;font-size:10px;white-space:nowrap}.first-visit button{padding:8px 12px;border:0;background:var(--accent);color:#fff;font-size:9px;cursor:pointer}
.lcc-viewer.is-loading .first-visit{opacity:0;visibility:hidden}
.mobile-move{display:none;position:absolute;z-index:14;left:17px;bottom:123px;width:108px;height:108px;grid-template-columns:repeat(3,34px);grid-template-rows:repeat(2,34px);gap:3px}.mobile-move button{border:1px solid rgba(255,255,255,.28);border-radius:50%;background:rgba(29,37,31,.55);color:white;backdrop-filter:blur(8px);touch-action:none}.mobile-move button:nth-child(1){grid-column:2}.mobile-move button:nth-child(2){grid-column:1;grid-row:2}.mobile-move button:nth-child(3){grid-column:2;grid-row:2}.mobile-move button:nth-child(4){grid-column:3;grid-row:2}.mobile-move button.is-pressed{background:var(--accent)}
.video-layer{position:absolute;z-index:40;inset:0}.video-scrim{position:absolute;inset:0;background:rgba(18,22,19,.58);backdrop-filter:blur(12px)}.video-sheet{position:absolute;right:20px;top:20px;bottom:20px;width:min(880px,calc(100% - 40px));display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:#ebe7dd;box-shadow:0 30px 100px rgba(9,12,10,.4)}.video-sheet header{height:84px;padding:0 25px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.video-sheet header small{color:var(--accent);font:7px monospace;letter-spacing:.18em}.video-sheet header h2{margin:7px 0 0;font-size:22px;font-weight:400}.video-sheet header button{width:38px;height:38px;border:1px solid var(--line);background:transparent;color:#57615a;font-size:24px;cursor:pointer}.video-stage{position:relative;min-height:0;background:#151a16}.video-stage video{width:100%;height:100%;display:block;object-fit:contain;background:#111}.video-empty{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#8b918c;pointer-events:none}.video-empty span{width:58px;height:58px;display:grid;place-items:center;border:1px solid #66716a;border-radius:50%;font-size:18px}.video-empty p{font-size:11px}.video-tabs{min-height:92px;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.video-tabs button{padding:16px 18px;display:flex;align-items:center;gap:13px;text-align:left;border:0;border-right:1px solid var(--line);background:transparent;color:#5f6861;cursor:pointer}.video-tabs button:last-child{border-right:0}.video-tabs button:hover,.video-tabs button.is-active{background:rgba(147,109,76,.1);color:var(--ink)}.video-tabs i{color:var(--accent);font:9px monospace;font-style:normal}.video-tabs b,.video-tabs small{display:block}.video-tabs b{font-size:12px;font-weight:400}.video-tabs small{margin-top:4px;color:#838982;font:7px monospace;letter-spacing:.08em}
@keyframes orbit{to{transform:rotate(360deg)}}@keyframes pulse{50%{transform:scale(.72);opacity:.62}}
@media (max-width:1050px){.topbar{grid-template-columns:1fr auto}.viewer-brand{display:none}.scene-tabs{border-left:0}.scene-dock{grid-template-columns:1fr auto}.control-legend{display:none}}
@media (max-width:720px){.topbar{top:10px;left:10px;right:10px;height:56px;grid-template-columns:1fr auto}.scene-tabs{min-width:0}.scene-tabs button{min-width:0;padding:0 10px;gap:5px;flex:1}.scene-tabs button i{display:none}.scene-tabs button span{font-size:10px}.viewer-tools button{min-width:43px;padding:0 9px}#qualityButton{min-width:43px}#qualityButton b{display:none}.scene-dock{left:10px;right:10px;bottom:10px;min-height:83px;grid-template-columns:1fr auto}.scene-caption{padding:12px 14px}.scene-caption h2{font-size:16px}.scene-caption p{max-width:47vw}.scene-actions button{min-width:56px}.scene-actions button span{display:none}.scene-actions i{margin:0}.mobile-move{display:grid}.first-visit{top:auto;bottom:205px}.first-visit span{display:none}.performance-notice{top:76px;right:10px}.video-sheet{inset:10px;width:auto}.video-tabs{min-height:78px}.video-tabs button{justify-content:center;padding:12px 7px}.video-tabs i{display:none}.video-tabs small{display:none}}
@media (max-width:470px){.scene-tabs button{padding:0 7px}.scene-tabs button span{font-size:9px}.viewer-tools #resetButton{display:none}.scene-caption p{display:none}.scene-actions button:nth-child(1),.scene-actions button:nth-child(2){display:none}.video-sheet header{height:74px;padding:0 17px}.video-sheet header h2{font-size:18px}.error-panel{padding:27px 20px}.error-panel>div{flex-direction:column}.mobile-move{bottom:104px}}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}.load-emblem i{animation:none}}