保持文本格式（其段落）与mySQL相呼应，并应用CSS

I am retrieving a text from mySQL database table column which is in three separate paragraphs in the database. To preserve the format I use the pre tag:

<h3 class="Container1">
        <pre>
             <?php
                  $result = $conn->query($sql);
                  if ($result->num_rows > 0) {
                        while($row = $result->fetch_assoc()) {
                                echo $row["Explanation"];
                                    }
                            }
            ?>
</pre>

Now I have also defined in my CSS file Container1, which has a defined font-family and so-forth.

Now the result I am getting is preserved text with the correct paragraphs as from the database but Container1 CSS is no longer applied. Is there anyway I can have the Container1 CSS also applied?

Thanks