css

.arrow-right {
    display: inline-block;
    width: .15rem;
    height: .15rem;
    border-top: .01rem solid #666;
    border-right: .01rem solid #666;
    transform: rotate(45deg);
}

html:

<li id="couponRow">
	<label>优惠券</label>
	<div class="input-text yhq-text" data-nums="5">
		<input id="couponId" type="hidden" name="couponId" value="">
		<span id="youhuiquan">0张可用</span>&nbsp;<span class="arrow-right"></span>
	</div>
</li>

css实现向右的箭头_rotate