<style>
    .float-wa{
        position:fixed;
        width:60px;
        height:60px;
        bottom:40px;
        right:40px;
        background-color:#25d366;
        color:#FFF;
        border-radius:50px;
        text-align:center;
        font-size:30px;
        z-index:100;
    }
</style>