Formula:Ancora tacita/style.css

@keyframes acclaratio-ancorae {
	0%, 100% {
		background-color: transparent;
	}
	25%, 85% {
		background-color: rgba(0, 127, 255, .13333);
	}
}

span.ancora:not(:empty):target {
	animation: 4s ease 0s 1 acclaratio-ancorae;
}