Collapsible FAQs - HTML/CSS Help

Hey abenton , we use Stripo and it has an AMP block called "Accordion" which is probably what you want to achieve. Here's the code and I'll attach screenshots from the results below. 

<td align="left" class="esd-amp-accordion">
    <amp-accordion animate>
        <section>
            <h3 class="section-title">Can I cancel my membership?</h3>
            <div>
                <table width="100%" cellspacing="0" cellpadding="0">
                    <tbody class="accordion">
                        <tr>
                            <td align="left" class="esd-block-text">
                                <p>Answer here</p>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </section>
        <section>
            <h3 class="section-title">How to get a refund?</h3>
            <div>
                <table width="100%" cellspacing="0" cellpadding="0">
                    <tbody class="accordion">
                        <tr>
                            <td align="left" class="esd-block-text">
                                <p>Answer here</p>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </section>
        <section>
            <h3 class="section-title">Where to renew my subscription?</h3>
            <div>
                <table width="100%" cellspacing="0" cellpadding="0">
                    <tbody class="accordion">
                        <tr>
                            <td align="left" class="esd-block-text">
                                <p>Answer here</p>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </section>
    </amp-accordion>
</td>

Buuut as others have said, I highly doubt this will work across all email clients. So not sure if it's worth investing time in it...