e article:
      -   A "read more" button, which is a regular link to the article.
      -   A "bookmark" button, which sends a request to bookmark the article to the server asynchronously via `amp-form`.
    -->
    <div class="buttons">
      <div>
        <a class="ampstart-btn link" href="https://www.ampproject.org/docs/interaction_dynamic/amp-email-format">Read more</a>
      </div>
      <div class="bookmark">
        <form action-xhr="<%host%>/amphtml-email/submit-form-bookmark" method="post">
      