cssでシンプル矢印

まずはhtml

<span class="simplearrow" ></span>

次にbefore after

.simplearrow::before {
content: "";
position::absolute;
top: 0;
bottom: 0;
left: 0;
width: 20px;
height: 1px;
margin: auto;
background-color: #686868;
}
.simplearrow::after {
content: "";
position: absolute;
top: 0;
bottom: 0;
left: 50%;
width: 8px;
height: 8px;
margin: auto;
border-top: 1px solid #686868;
border-right: 1px solid #686868;
transform: rotate(45deg);
}