.jvfc-wrap{position:fixed;display:flex;flex-direction:column;z-index:99999}
.jvfc-btn{display:flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:999px;background:var(--jvfc-color,#2563eb);color:#fff;text-decoration:none;box-shadow:0 10px 25px rgba(0,0,0,.2);transition:transform .1s ease,opacity .2s ease}
.jvfc-btn:active{transform:scale(.96)}
.jvfc-side-left{left:12px} .jvfc-side-right{right:12px}
@media (max-width:480px){.jvfc-btn{width:50px;height:50px}}