查看“︁MediaWiki:Gadget-mucPageTools.css”︁的源代码

.muc-codeblock {
	position: relative;
}

.muc-codeblock > pre {
	padding-right: 4.5em;
}

.muc-codecopy {
	position: absolute;
	top: 0.45em;
	right: 0.45em;
	border: 1px solid #a2a9b1;
	border-radius: 3px;
	background: #f8f9fa;
	color: #202122;
	font: inherit;
	font-size: 0.875em;
	line-height: 1.6;
	padding: 0.1em 0.55em;
	cursor: pointer;
}

.muc-codecopy:hover {
	background: #fff;
}

#muc-backtop {
	position: fixed;
	right: 1.25rem;
	bottom: 1.25rem;
	z-index: 10;
	width: 2.25rem;
	height: 2.25rem;
	border: 1px solid #a2a9b1;
	border-radius: 50%;
	background: #fff;
	color: #202122;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.16);
	cursor: pointer;
	opacity: 0;
	pointer-events: none;
	transition: opacity 160ms ease-in-out;
}

#muc-backtop.is-visible {
	opacity: 1;
	pointer-events: auto;
}