.heading {
    position: absolute;
    text-align: center;
    top: 40%;
    width: 100%;
}
/**/
.heading h1 {
    color: #FFFFFF;
    font-size: 70px;
}
.heading h3 {
    color: #FFFFFF;
    font-size: 20px;
}

.heading button {
    color: #FFFFFF;
    font-size: 25px;
    margin: 15px;
}

/**/
#particles-js {
    height: 100hv;
    width: 100%;
    background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.6)), url("https://cdn.cybprotech.com/static/wsite/imgs/business01.jpg");
    background-repeat: no-repeat;
    background-size: cover;

}