三角の矢印 (上向き)のアイコン
<span class="dli-caret-up"></span>
.dli-caret-up {
display: inline-block;
vertical-align: middle;
color: #333;
line-height: 1;
width: 0;
height: 0;
border-style: solid;
border-color: transparent;
border-width: 0.64952em 0.375em;
border-bottom-color: currentColor;
border-top: 0;
}