.frame-box-001 {
	padding: 20px;
	position: relative;
}

.frame-box-001::before, .frame-box-001::after {
	content: '';
	width: 20px;
	height: 20px;
	position: absolute;
}

.frame-box-001::before {
	border-left: solid 5px #999;
	border-top: solid 5px #999;
	top: 0;
	left: 0;
}

.frame-box-001::after {
	border-right: solid 5px #999;
	border-bottom: solid 5px #999;
	bottom: 0;
	right: 0;
}