body, body p{ text-align: center; }
body{ background: url(fondo-pagina.jpg) no-repeat; background-size: cover; }
#fondo-pagina{ position: absolute; width: 100%; height: 100%; top: 0; left: 0; background: rgba(255,255,255,0.75) }
body p{ max-width: 600px; margin: 20px auto; font-size: 20px; }
body img{ padding-top: 15%; }