.img-box {
  width: 100%;
  height: 500px;
  background-image: url(../images/banner-duty.png);
  -webkit-background-size: cover;
  background-size: cover;
  background-origin: border-box;
  background-blend-mode: lighten;
  background-repeat: no-repeat;
  background-position: center;
}

.content {
  padding-top: 30px;
  background: #f6eadc;
}

.content .main {
  max-width: 700px;
}

.content img {
  width: 100%;
}

@media (max-width: 480px) {
  .img-box {
    height: 250px;
  }
}