:root{--blue:#1E40AF;--green:#10B981;--ink:#111827;--muted:#6B7280;--line:#E5E7EB;--bg:#F8FAFC;--card:#fff}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:linear-gradient(135deg,#f8fbff,#f4fff9);color:var(--ink)}.shell{max-width:1160px;margin:0 auto;padding:32px 20px}.hero{display:flex;justify-content:space-between;gap:24px;align-items:flex-end;margin-bottom:24px}.eyebrow{color:var(--blue);font-weight:700;letter-spacing:.04em}.hero h1{font-size:42px;margin:8px 0 10px}.hero p{font-size:17px;color:var(--muted);max-width:720px;line-height:1.7}.status-card{min-width:260px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;display:flex;gap:14px;align-items:center;box-shadow:0 12px 35px rgba(30,64,175,.08)}.dot{width:14px;height:14px;border-radius:50%;background:#9CA3AF;box-shadow:0 0 0 6px rgba(156,163,175,.14)}.dot.live{background:var(--green);box-shadow:0 0 0 6px rgba(16,185,129,.16)}.dot.speaking{background:var(--blue);box-shadow:0 0 0 6px rgba(30,64,175,.16)}.status-card span{display:block;color:var(--muted);font-size:13px;margin-top:4px}.grid{display:grid;grid-template-columns:1.05fr .95fr;gap:22px}.panel{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 35px rgba(15,23,42,.06)}.avatar-panel{text-align:center}.avatar{margin:6px auto 18px;width:128px;height:128px;border-radius:36px;background:linear-gradient(135deg,var(--blue),var(--green));color:white;display:grid;place-items:center;font-size:64px;font-weight:900;box-shadow:0 18px 40px rgba(30,64,175,.22);transition:.2s}.avatar.speaking{transform:scale(1.04);filter:saturate(1.2)}.wave-wrap{background:#F1F5F9;border-radius:18px;border:1px solid #E2E8F0;overflow:hidden}canvas{width:100%;height:160px;display:block}.controls{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:18px}button{border:1px solid var(--line);background:white;border-radius:999px;padding:12px 18px;cursor:pointer;font-weight:700;color:#374151}button.primary{border-color:transparent;background:linear-gradient(135deg,var(--blue),var(--green));color:white}button:hover{transform:translateY(-1px)}.hint,.small{color:var(--muted);font-size:13px;line-height:1.7;margin-top:14px}.diag{padding-left:18px;color:#374151;line-height:1.8;min-height:120px}.chat{display:flex;flex-direction:column;gap:12px;max-height:360px;overflow:auto}.msg{padding:12px 14px;border-radius:16px;line-height:1.65}.msg.user{background:#EFF6FF;align-self:flex-end}.msg.ai{background:#ECFDF5;align-self:flex-start}.chips{display:flex;gap:12px;flex-wrap:wrap}.chip{background:#F8FAFC}@media(max-width:860px){.hero,.grid{display:block}.status-card{margin-top:16px}.panel{margin-bottom:18px}.hero h1{font-size:32px}}