.f_lineSingle span {
	display: block;
	width: 10px;
	height: 10px;
	border: 1px solid gold;
	transform: rotate(45deg);
	position: absolute;
}

.f_lineSingle span:first-child::after {
	content: '';
	background: gold;
	width: 1px;
	transform: rotate(45deg);
	height: 35px;
	position: absolute;
	top: -30px;
	left: 20px;
}