div.jumbotron.hero-photography {
  background-image:url('hero-background-photography.jpg');
}

div.jumbotron.hero-technology {
  background-image:url('hero-background-technology.jpg');
}

h1.hero-title, h2.hero-title, h3.hero-title {
  text-shadow:0 3px 3px rgba(0,0,0,0.4);
  color:#fff;
}