.go-top-x{position:fixed;right:22px;bottom:22px;width:64px;height:64px;z-index:99999;opacity:0;visibility:hidden;transform:translateY(20px) scale(.9);transition:.4s cubic-bezier(.4,0,.2,1);} 
.go-top-x.show{opacity:1;visibility:visible;transform:none;} 
.progress-ring{width:100%;height:100%;transform:rotate(-90deg);} 
.ring-bg{fill:none;stroke:#e5e7eb;stroke-width:6;} 
.ring-progress{fill:none;stroke:url(#gradX);stroke-width:6;stroke-linecap:round;stroke-dasharray:276;stroke-dashoffset:276;} 
.go-top-core{position:absolute;inset:6px;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;color:#e11d48;box-shadow:0 12px 30px rgba(0,0,0,.25);}