.about-bg {
  position: relative;
  height: 70vh;
  width: 100%;
  background: url(../img/cyber-security/Penetration-Testing-Header-2.jpeg) top
    center no-repeat;
  background-size: cover;
  z-index: 1;
}
.about-bg::after {
  content: " ";
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.6);
}
.pentration-methedology-img img {
  width: 100%;
  margin-bottom: 2em;
}