疑似要素とclip-pathで三角形

&:after {
			position: absolute;
			content: "";
			width: 200px;
			height: 50px;
			bottom: -50px;
			left: 50%;
			transform: translateX(-50%);
			background-color: #9D1427;
			clip-path: polygon(0 0, 100% 0%, 50% 100%);
		}