dt:after {
    content: "";
    max-width: 10px;
    max-height: 10px;
    width: 1.56vw;
    height: 1.56vw;
    border: #508d9b solid;
    border-width: 1px 1px 0 0;
    position: absolute;
    top: 50%;
    right: -10px;
    transform: translate(0, -50%) rotate(45deg);
}