Fonts icon suspected of introducing too much trouble, make your own

Such as:

	.hint {
			width: 20px;
			height: 20px;
			border-radius: 50%;
			background: black;
			font-size: 16px;
			color: #fff;
			line-height: 20px;
			vertical-align: baseline;
			display: inline-block;
			text-align: center;
				}


<i class="hint">?</i>	

The? Replaced by other appropriate symbols on it, and replaced the picture, then on again self-transformation