h1.page-title {
  position: relative;
  text-align: center;
}

footer {
  position: absolute;
  width: 100%;
  bottom: 0;
  z-index: 999;
}
header.page-header {
  background: #ffffff;
  z-index: 9;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

header {
  background: #000;
}
.page-content {
  top: 300px;
  position: relative;
  text-align: center;
  z-index: 999;
}

@media screen and (max-width: 991px) {
  .page-content {
    top: 00px;
    position: relative;
    text-align: center;
    z-index: 999;
    min-height: 75vh;
    display: flex;
    flex-flow: column;
    align-items: center;
    justify-content: center;
  }
}

@media screen and (max-width: 767px) {
  header {
    min-height: 110px;
  }
  h1.page-title {
    top: 140px;
  }
}