.aboutus {
    position: relative;
    background-image: url('../images/aboutus-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    height: 100vh;
    color: #FFF;
    display: flex;
    justify-content: center;
    align-items: center;
}
.aboutus::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1;
}
.aboutus-content {
    position: relative;
    z-index: 2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}
.aboutus-content h1 {
    font-size: 3.5em;
    font-weight: bolder;
}
.aboutus-content p {
    font-size: 1.8em;
}

@media (max-width: 768px) {
    .aboutus-content h1 {
        font-size: 1.8em;
        font-weight: bolder;
    }
    .aboutus-content p {
        font-size: 1.2em;
    }
}