.dfc-btn{position:fixed;bottom:20px;width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;z-index:99999;text-decoration:none;animation:dfcpulse 1.8s infinite;box-shadow:0 4px 14px rgba(0,0,0,.3)}
@keyframes dfcpulse{0%{transform:scale(1)}50%{transform:scale(1.08)}100%{transform:scale(1)}}
@media(max-width:767px){.dfc-btn{width:50px;height:50px;bottom:85px}}