CodePen Embed - gOwyyzm

<div>
    <p>
        <strong>Nội dung sẽ có màu đỏ vì nó nằm trong thẻ p.</strong>
        <span>Nội dung không có màu vì nó nằm ngoài thẻ p.</span>
    </p>
</div>

div p strong{
    color: red
}

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