.faq-questions {
    display: none;
    animation: fadeEffect 1s;
}
a.faq-category {
    cursor: pointer;
}
.faq-category.active,
.faq-questions.active {
    display: block;
}
@keyframes fadeEffect {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}