.hd-bot-btn{
  position:fixed;
  left:22px;
  bottom:22px;
  z-index:2147483647;
  width:58px;height:58px;
  border-radius:18px;
  border:0;
  color:#fff;
  font-size:22px;
  background:linear-gradient(135deg,#111827,#2E5BFF);
  box-shadow:0 16px 34px rgba(0,0,0,.18);
  display:flex;align-items:center;justify-content:center;
}

.hd-bot-panel{
  position:fixed;
  left:22px;
  bottom:92px;
  z-index:2147483647;
  width:420px;
  max-width:calc(100vw - 30px);
  height:620px;
  max-height:76vh;
  background:#fff;
  border:1px solid rgba(0,0,0,.10);
  border-radius:18px;
  box-shadow:0 20px 60px rgba(0,0,0,.22);
  display:none;
  overflow:hidden;
}
.hd-bot-panel.open{display:flex;flex-direction:column}

.hd-bot-head{
  padding:12px 14px;
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid rgba(0,0,0,.08);
  background:#f7f9ff;
}
.hd-bot-title{font-weight:900}
.hd-bot-body{flex:1;overflow:auto;padding:12px;background:linear-gradient(180deg,#f6f8ff,#f2f5ff)}
.hd-bot-msg{max-width:86%;padding:10px 12px;border-radius:14px;margin:8px 0;font-size:14px;line-height:1.25;white-space:pre-line}
.hd-bot-msg.user{margin-left:auto;background:rgba(46,91,255,.14);border:1px solid rgba(46,91,255,.18)}
.hd-bot-msg.bot{margin-right:auto;background:#fff;border:1px solid rgba(0,0,0,.10)}
.hd-bot-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}
.hd-bot-actions button{
  border:1px solid rgba(0,0,0,.12);
  background:#fff;
  border-radius:12px;
  padding:8px 10px;
  font-weight:900;
  cursor:pointer;
}
.hd-bot-actions button.primary{background:#2E5BFF;color:#fff;border-color:#2E5BFF}

.hd-bot-foot{
  padding:10px;
  border-top:1px solid rgba(0,0,0,.08);
  display:flex;gap:8px;
  background:#fff;
}
.hd-bot-in{
  flex:1;
  border:1px solid rgba(0,0,0,.15);
  border-radius:16px;
  padding:10px 12px;
  outline:none;
}
.hd-bot-send{
  width:44px;height:44px;border-radius:14px;border:0;
  background:#00C853;color:#fff;font-weight:900;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
}