.ctv-zalo-fab{position:fixed;bottom:1.5rem;right:1.5rem;z-index:50;width:56px;height:56px;border-radius:50%;background:#0068FF;color:#ffffff;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(0,104,255,.3);text-decoration:none;transition:all .3s ease;font-size:1.5rem}.ctv-zalo-fab:hover{transform:scale(1.1);box-shadow:0 6px 28px rgba(0,0,0,.2)}.ctv-zalo-fab:before{content:"";position:absolute;inset:-4px;border-radius:50%;background:#0068FF;opacity:.3;animation:ctv-pulse 2s ease-in-out infinite}@keyframes ctv-pulse{0%,to{transform:scale(1);opacity:.3}50%{transform:scale(1.15);opacity:0}}