#scrollTopBtn{position:fixed;bottom:70px;right:30px;width:50px;height:50px;background:linear-gradient(135deg,#4e54c8,#8f94fb);border:none;border-radius:50%;box-shadow:0 4px 15px rgb(78 84 200 / .5);cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;opacity:0;pointer-events:none;transform:translateY(20px);transition:opacity 0.4s ease,transform 0.4s ease;z-index:9999;user-select:none}#scrollTopBtn.show{opacity:1;pointer-events:auto;transform:translateY(0)}#scrollTopBtn:hover{background:linear-gradient(135deg,#8f94fb,#4e54c8);box-shadow:0 6px 20px rgb(143 148 251 / .7);transform:translateY(-3px);transition:all 0.3s ease}#scrollTopBtn svg{stroke-width:2.5;stroke:#fff;width:24px;height:24px}