.cb-fixed{position:fixed;right:20px;bottom:20px;z-index:9999}
  .cb-btn{width:56px;height:56px;border-radius:9999px;border:none;cursor:pointer;box-shadow:0 10px 25px rgba(0,0,0,.2);display:flex;align-items:center;justify-content:center;background:#111;color:#fff}
  .cb-panel{position:fixed;right:20px;bottom:90px;width:320px;max-width:95vw;height:440px;max-height:70vh;background:#fff;border-radius:16px;box-shadow:0 20px 40px rgba(0,0,0,.25);display:none;flex-direction:column;overflow:hidden}
  .cb-header{padding:12px 14px;background:#111;color:#fff;display:flex;align-items:center;justify-content:space-between}
  .cb-title{font-weight:600}
  .cb-close{background:transparent;border:none;color:#fff;font-size:18px;cursor:pointer}
  .cb-body{flex:1;overflow:auto;padding:12px;background:#f7f7f8}
  .cb-msg{margin:8px 0;display:flex}
  .cb-msg.user{justify-content:flex-end}
  .cb-bubble{max-width:80%;padding:10px 12px;border-radius:14px;line-height:1.35;font-size:14px;white-space:pre-wrap;word-wrap:break-word}
  .cb-msg.user .cb-bubble{background:#111;color:#fff;border-bottom-right-radius:4px}
  .cb-msg.bot .cb-bubble{background:#fff;border:1px solid #e5e7eb;border-bottom-left-radius:4px}
  .cb-input{border-top:1px solid #e5e7eb;padding:8px;background:#fff;display:flex;gap:8px}
  .cb-inp{flex:1;border:1px solid #e5e7eb;border-radius:12px;padding:10px;font-size:14px}
  .cb-send{border:none;border-radius:12px;padding:10px 14px;background:#111;color:#fff;cursor:pointer}
  .cb-typing{font-size:12px;color:#6b7280;margin-left:6px}