#myBtn {
	height: 50px;
	width: 50px;
	position: fixed;
	right: 5px;
	bottom: 100px;
	background: url(https://langdanonnuoc.danang.vn/wp-content/uploads/2026/06/icon-back-to-top-langdanonnuocdanang.png);
	z-index: 1;
	background-repeat: no-repeat;
	display: none;
	border: none;
}