:root{--bg-0: #050b18;--bg-1: #0c1a35;--card: rgba(12, 27, 52, .62);--line: rgba(124, 174, 255, .28);--text: #eaf3ff;--sub: #aac2e7;--accent: #66cbff;--accent-2: #95f0ff;--shadow: 0 14px 36px rgba(4, 15, 35, .45);--transition: all .35s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box}html,body{margin:0;height:100%;background:radial-gradient(circle at 15% 20%,#143364 0%,var(--bg-1) 44%,var(--bg-0) 100%);color:var(--text);font-family:Microsoft YaHei,PingFang SC,sans-serif}.viewer-wrap{position:relative;width:100%;height:100%;overflow:hidden}#viewer-canvas{display:block;width:100%;height:100%}.hotspot-layer{position:fixed;inset:0;pointer-events:none}.floating-card{background:var(--card);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);transition:var(--transition)}.floating-card:hover{transform:translateY(-3px);box-shadow:0 18px 40px #08152e8a}.hud-left{position:absolute;left:18px;top:18px;z-index:20;display:flex;align-items:center;flex-wrap:wrap;gap:10px}.hud-title-card{padding:8px 12px;border-radius:999px}.hud-title{display:flex;align-items:center;gap:8px}.hud-title svg{width:20px;height:20px;stroke:var(--accent-2);fill:none;stroke-width:1.8;stroke-linecap:round}.hud-title h1{margin:0;font-size:17px;line-height:1.2;white-space:nowrap}.hud-title p{margin:4px 0 0;color:var(--sub);font-size:12px}.model-switch{margin-left:0;display:flex;align-items:center;gap:6px;position:relative;border:1px solid rgba(110,196,255,.56);border-radius:999px;background:linear-gradient(130deg,#10305fd6,#091a37eb);box-shadow:0 10px 24px #08183673;padding:4px 8px;transition:transform .24s cubic-bezier(.22,1,.36,1),box-shadow .24s cubic-bezier(.22,1,.36,1),border-color .2s linear;animation:modelSwitchReveal .28s cubic-bezier(.22,1,.36,1)}.model-switch:hover{transform:translateY(-1px);border-color:#95f0ffa6;box-shadow:0 12px 26px 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