.about-container {
    max-width: 1600px;
    margin: auto;
    background-color: black;
    clip-path: polygon(40% 10%, 40% 0, 100% 0, 100% 100%, 65% 100%, 65% 90%, 0 90%, 0 10%);
}

.about-img-holder {
    position: relative;
    z-index: 4;
}
.about-img-holder img {
    z-index: 300;
    box-shadow: 25px 25px 0px 4px white;
}
@media (max-width: 992px) {
    .about-container {
        clip-path: polygon(0 0, 100% 0%, 100% 100%, 0% 100%);
    }
    .about-img-holder img {
        box-shadow: none;
    }

}