.wo-top{position:fixed;right:18px;bottom:18px;width:46px;height:46px;border:none;border-radius:50%;background:var(--cta);color:#fff;font-size:1.2rem;box-shadow:0 8px 20px rgba(37,99,235,.4);opacity:0;pointer-events:none;transition:opacity .25s;z-index:60;cursor:pointer}.wo-top.show{opacity:1;pointer-events:auto}