:root{--bg: #050505;--panel: #111111;--ink: #f4f1ea;--muted: #9a9488;--line: rgba(255, 255, 255, .12);--gold: #d4b48a;--gold-dim: rgba(212, 180, 138, .18);--danger: #e15b5b;--ok: #7dcea0;--warn: #e7b567;--font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;--font-serif: "Songti SC", "SimSun", "Noto Serif SC", serif}*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;background:var(--bg);color:var(--ink);font-family:var(--font)}body{overflow:hidden}body.is-landing{overflow:auto}#app{min-height:100vh}.screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 20px 56px;position:relative}.screen:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse at 50% 18%,rgba(212,180,138,.12),transparent 42%),radial-gradient(ellipse at 50% 100%,rgba(0,0,0,.55),transparent 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img{width:100%;height:100%;object-fit:contain}.qr-loading{color:#888;font-size:13px;text-align:center;padding:12px}.qr-hint{font-size:13px;color:var(--muted);text-align:center;line-height:1.5}.history-list{max-height:320px}.history-item{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;text-align:left;background:transparent;border:0;color:inherit;font:inherit;cursor:pointer;padding:0}.history-item:hover{color:var(--ink)}.stage{position:relative;z-index:1;width:min(560px,100%);display:flex;flex-direction:column;align-items:center;gap:16px}.avatar-wrap{position:relative;width:248px;height:248px}.avatar-ring{position:absolute;top:-10px;right:-10px;bottom:-10px;left:-10px;border-radius:50%;border:1px solid rgba(212,180,138,.35);box-shadow:0 0 40px #d4b48a1f;animation:breathe 4.6s ease-in-out infinite}.avatar-wrap.speaking .avatar-ring{border-color:var(--gold);box-shadow:0 0 48px #d4b48a61;animation:speakPulse 1.2s ease-in-out infinite}.avatar{width:248px;height:248px;border-radius:50%;object-fit:cover;display:block;background:#1a1a1a;border:3px solid #2a241c}.avatar.placeholder{display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:48px}.twin-name{font-family:var(--font-serif);font-size:28px;font-weight:700;letter-spacing:.18em}.status{font-size:13px;color:var(--danger);display:flex;align-items:center;gap:8px}.status.ok{color:var(--ok)}.status.warn{color:var(--warn)}.dot{width:8px;height:8px;border-radius:50%;background:currentColor;box-shadow:0 0 8px currentColor}.bubble{width:100%;max-width:420px;border:1px solid rgba(255,255,255,.22);border-radius:8px;padding:14px 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canvas{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}.cam-label{position:absolute;left:8px;bottom:6px;font-size:11px;color:#fff;text-shadow:0 1px 4px #000}.metrics{display:grid;gap:4px;font-size:12px;color:var(--muted)}.metrics b{color:var(--ink);font-weight:500}.side{position:absolute;right:20px;bottom:36px;z-index:2;display:flex;flex-direction:column;gap:8px;align-items:flex-end}.chip{font-size:12px;padding:6px 10px;border-radius:999px;background:#ffffff0f;border:1px solid var(--line)}.chip.bad{color:var(--danger);border-color:#e15b5b66}.setup-card{width:min(520px,100%);background:#111111e0;border:1px solid var(--line);border-radius:20px;padding:28px 24px 24px;position:relative;z-index:1}.setup-card h1{font-family:var(--font-serif);font-size:26px;margin-bottom:8px}.setup-card p.lead{color:var(--muted);font-size:14px;line-height:1.7;margin-bottom:22px}.field{margin-bottom:16px}.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.field 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