section, article {
    background-color: #ddd;
    margin: 30px 0;
    padding: 30px 0;
}
section p {
    color: red;
}
h3 + p {
    color: blue;
}
article > p {
    color: green;
}
h4 ~ p {
    color:darkviolet;
}
span {
    font-size: 25px;
    font-weight: 600;
    background-color: #ffff008e;
}