<a href="https://wa.me/51987598861?text=Hola,%20quiero%20información%20sobre%20sus%20servicios"
class="whatsapp-float"
target="_blank"
aria-label="WhatsApp">
<i>💬</i>
</a>

<style>
.whatsapp-float{
position:fixed;
right:20px;
bottom:20px;
width:65px;
height:65px;
background:#25D366;
border-radius:50%;
display:flex;
align-items:center;
justify-content:center;
font-size:28px;
text-decoration:none;
z-index:999999;
box-shadow:0 10px 25px rgba(0,0,0,0.3);
transition:all .3s ease;
animation:pulse 2s infinite;
}

.whatsapp-float:hover{
transform:scale(1.15);
}

.whatsapp-float::before{
content:"Escríbenos";
position:absolute;
right:80px;
background:white;
color:#333;

100%{box-shadow:0 0 0 0 rgba(37,211,102,0);}
}

@media(max-width:768px){
.whatsapp-float{
width:60px;
height:60px;
right:15px;
bottom:15px;
}
.whatsapp-float::before{
display:none;
}
}
</style> padding:8px 12px;
border-radius:10px;
font-size:13px;
white-space:nowrap;
box-shadow:0 3px 10px rgba(0,0,0,.2);
opacity:0;
visibility:hidden;
transition:.3s;
}

.whatsapp-float:hover::before{
opacity:1;
visibility:visible;
}

@keyframes pulse{
0%{box-shadow:0 0 0 0 rgba(37,211,102,.6);}
70%{box-shadow:0 0 0 15px rgba(37,211,102,0);}