.parallax_section {
    position: relative;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
}
.sp_one {
    padding: 120px 0;
}

.parallax_section:before {
    position: absolute;
    content: '';
    background: rgba(0, 0, 0, 0.6);
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}