body{background:#050505 url("recursos/fondo_huellas.jpg") center top/cover fixed no-repeat}
.hero{background:linear-gradient(rgba(0,0,0,.22),rgba(0,0,0,.22)),url("recursos/fondo_huellas.jpg") center top/cover fixed no-repeat}
.acciones{position:relative;background:linear-gradient(to bottom,rgba(11,11,11,0) 0,rgba(11,11,11,.62) 72px,#0b0b0b 180px);}