site/_src/_includes/sections/section-cta.html

{% if layout %}
    {% assign context = layout %}
{% else %}
    {% assign context = page %}
{% endif %}

<section class="section section-cta background--photo text-center">
    <div class="row">
        <header class="section-header">
            <h1 class="section-title">{{ context.cta.title }}</h1>
            <p class="section-description">{{ context.cta.description }}</p>
        </header>

        <a class="btn btn-primary" href="{{ context.cta.button_link }}">
            {{ context.cta.button }}
        </a>
    </div>
</section>