<footer id="collabo_footer">
  <div class="footer-wrap">
    <div class="d-flex justify-content-around h-100">
      <div class="footer_item">
        <a href="#">
          <div class="img_wrap bg_gray">
            <img src="icon/icon_voice_gray.png" alt="音声">
          </div>
        </a>
      </div>
      <div class="footer_item">
        <a href="#">
          <div class="img_wrap bg_gray">
            <img src="icon/icon_record.png" alt="録音">
          </div>
        </a>
      </div>
      <div class="footer_item">
        <a href="chat_room.html">
          <div class="img_wrap bg_red">
            <img src="icon/icon_tell.png" alt="通話">
          </div>
        </a>
      </div>
    </div>
  </div>
</footer>