.rc {
    background-color: rgb(72, 1, 119);
}

body {
    background-size: cover;   
    background-position: center; 
    background-attachment: fixed; 
    background-repeat: no-repeat; 
}

.conteudo-banner h1 {
    font-size: 4rem;               
    font-weight: bold;
}

.minha-img {
    width: 300px;
    display:block;
    margin: 0 auto;
}