.themeContentStyle1 {
    position: relative;
}

.themeContentStyle1:after {
    content: '';
    position: absolute;
    left: calc(100% + 10px);
    background: url("/theme/images/arrow_right.png");
    width: 46px;
    height: 18px;
    top: 50%;
    transform: translateY(-50%);
}