.parallax {background-repeat: no-repeat;background-position: top;background-size: cover;position: absolute;bottom: 0;left: 0;width: 100%;height: 100%;display: block}
.header {padding: 50px 0;position: relative;background-position: 50%;background-size: cover}
.header .header_container {position: relative;z-index: 3;width: 80%;max-width: 1080px;margin-left: auto;margin-right: auto}
.header .parallax {background-repeat: no-repeat;background-position: top;background-size: cover;background-attachment: fixed;position: absolute;width: 100%;height: 100%;overflow: hidden}