#hero {
    display: table;
    position: relative;
    width: 100vw;
    height: 100vh;
    background: url('../img/bg.jpg') fixed center center ;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    background-size: cover;
    -o-background-size: cover;
}

@media (min-width: 300px) {
  #hero {
    background-attachment: fixed;
  }
}

#portfolio {
  background: linear-gradient(rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.7)), url('../img/faq1.jpg') fixed center top;
  background-size: cover;
  padding: 0px 0px 80px 0px;
  margin-top: -3px !important;
}