.hcb-btn{
  position:fixed;
  bottom:20px;
  width:60px;
  height:60px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:99999;
  box-shadow:0 6px 18px rgba(0,0,0,.25);
  animation:hcb-pulse 1.5s infinite;
}
.hcb-btn img{
  width:34px;
  height:34px;
  display:block;
}
.hcb-call{left:20px;background:#e53935;}
.hcb-wa{right:20px;background:#25D366;}
@keyframes hcb-pulse{
  0%{transform:scale(1);}
  50%{transform:scale(1.08);}
  100%{transform:scale(1);}
}
@media (max-width:768px){
  .hcb-btn{width:56px;height:56px;bottom:15px;}
  .hcb-btn img{width:32px;height:32px;}
  .hcb-call{left:15px;}
  .hcb-wa{right:15px;}
}