.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.6s ease-out;
}
.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.about-section {
    background-image: url('/image/banner.jpg');
    background-position: top center;
    background-size: cover;
    background-repeat: no-repeat;
}
.overlay {
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

#itBg {
    background-image: url('/image/itbg.png');
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    position: relative;
}
.it-overlay{
    background-color: rgba(0,0,0,0.5);
    z-index: 1;
}