A shopify section which builds accordions using

accordions.liquid

<section class="accordion faq">
	{% if section.settings.title %}
    <p style="text-align: center; font-style: italic;">{{ section.settings.title }}</p>
    {% endif %}
  
    {% for block in section.blocks %}
      {% capture index %}{% increment ind %}{% endcapture %}

        <input id="tab-{{ index }}" type="checkbox" name="faqs" class="hidden">
        <div class="section section-{{ section.id }} {% if forloop.first == true %}opened{% endif %} mar-top-sm" data-block-id="{{ block.id }}" {{ block.shopify_attributes }}>
          <label for="tab-{{ index }}" class="tab-opener">
            <h3 class="faq-question">{{ block.settings.title | escape }}</h3>
          </label>
          <div class="faq-answer mar-bot-sm">{{ block.settings.content }}</div>   

        </div>

    {% endfor %}
</section>


{% schema %}
{
  "name": "Accordions",
  "settings": [
    {
      "type": "text",
      "id": "title",
      "label": "Optional Header",
      "default": "Accordion Header"
    }
  ],
  "blocks": [
    {
      "type": "accordion",
      "name": "Accordion",
      "settings": [
        {
          "type": "text",
          "id": "title",
          "default": "Accordion Header",
          "label": "Accordion Header"
        },
        {
          "type": "richtext",
          "id": "content",
          "default": "<p>This section doesn’t currently include any content. <b>Add content to this section using the sidebar in the customizer.</b></p>",
          "label": "Accordion Content"
        }
      ]
    }
  ]
}
{% endschema %}

{% stylesheet 'scss' %}
.faq {
  margin-top: 40px;
  input {
    display: none;
  }
  label {
    display: flex;
  }
  label:before {
    content: "+";
    display: inline-block;
    width: 15px;
    margin-right: 10px;
    text-align: center;
    font-size: 20px;
    line-height: 1.2;
    font-weight: bold;
  }
  p {
    padding-left: 25px;
  }
  label h3 {
    display: inline-block;
    font-size: 20px;
  }
  input:checked + div > label:before {
    content: "-";
  }
  input + div > div {
    display: none;
  } 
  input:checked + div > div {
    display: block;
  }
}
{% endstylesheet %}

{% javascript %}
{% endjavascript %}