header {
  position: fixed;
  top: 0px;
  left: 20px;
  max-width: 500px;
}

body {
	font-family: Arvo;
	font-size: 16px;
	line-height: 1.5;
	
	background-color: #004d9d;
	color: #ffffff;
}

footer {
  position: fixed;
  bottom: 20px;
  left: 20px;
}

a {
  color: #ffffff;
  text-decoration: none;
  margin: 0 10px 0 0;
  transition: all 0.5s;
}

a:hover {
  color: #ff4141;
}

section {
  height: 100vh;
  width: 100%;
  background-image: url(index_1.png);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

section.index_2 {
  background-image: url(index_2.png);
  width: 100%;
}

section.index_3 {
  background-image: url(index_3.png);
  width: 100%;
}

section.index_4 {
  background-image: url(index_4.png);
  width: 100%;
}
section.index_5 {
  background-image: url(index_5.png);
  width: 100%;
}
@media (max-width: 2160px) {
  section {
    background-attachment: scroll;
    height: 60vw;
  }
}