.timeline4-wrap ul li {
    display: flex;
    transition: all 0.3s;
}

.timeline4-wrap ul li .timeline-icon {
    opacity: 0%;
    transition: all 0.2s;
}

.timeline4-wrap ul.timeline-list li.timeline-item:hover,
.timeline4-wrap ul.timeline-list li.timeline-item:hover .timeline-icon {
    opacity: 100%;
}

@media (max-width: 575.98px) {
    .timeline4-wrap ul li {
        flex-wrap: wrap;
    }
}