.hero-section {
  background: url("../Images/about-us-img.png") center/cover no-repeat;
  height: 100%;
  position: relative;
}
.hero-section .overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.253); /* overlay color */
}
img{
    width: 100%;
}