伪类

.view-action[data-v-eed1247a]:before {
    content: "";
    position: absolute;
    width: .75rem;
    height: .75rem;
    border-style: solid;
    border-color: #fff;
    border-width: .0625rem 0 0 .0625rem;
    -webkit-transform: rotate(315deg);
    transform: rotate(315deg);
    top: .9375rem;
    left: 1rem;
}

.view-action[data-v-eed1247a] {
    position: fixed;
    left: .625rem;
    top: 50%;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
    width: 2.5rem;
    height: 2.5rem;
    text-align: center;
    border-radius: 50%;
    background-color: rgba(0,0,0,.4);
    box-shadow: 0 0.1875rem 0.25rem 0 rgba(0,0,0,.5);
    z-index: 1000;
}