How To Add Individual FAQs on Every Collection Page Without Creating Separate Templates

Code mentioned in the video:

{%if collection.metafields.custom.faq.value != blank %}
<h2 class="sj-text-center">FAQ</h2>
{% endif %}

{% if collection.metafields.custom.faq and collection.metafields.custom.faq.value != blank %}
  <div class="sj-faq-wrapper">
    {% for item in collection.metafields.custom.faq.value %}
      {% assign parts = item | split: 'ans=' %}
      {% assign question = parts[0] | strip %}
      {% assign answer   = parts[1] | strip %}
      <details class="sj-faq">
        <summary>{{ question }}</summary>
        <div class="sj-faq-body">
          <p>{{ answer }}</p>
        </div>
      </details>
    {% endfor %}
  </div>
{% endif %}

<style>
.sj-faq-wrapper {
  width: 60%;
  margin: 0 auto;          /* centers on desktop */
}

.sj-faq {
  border-bottom: 1px solid #dadce0;
  font-family: "Roboto", system-ui, -apple-system, sans-serif;
}

.sj-faq summary {
  list-style: none;            /* removes default triangle */
  cursor: pointer;
  padding: 18px 8px;
  font-size: 16px;
  color: #202124;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color .15s ease;
}

.sj-faq summary::-webkit-details-marker { display: none; } /* Safari */

/* chevron */
.sj-faq summary::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid #5f6368;
  border-bottom: 2px solid #5f6368;
  transform: rotate(45deg);
  transition: transform .2s ease;
  margin-left: 16px;
  flex-shrink: 0;
}

.sj-faq[open] summary::after {
  transform: rotate(-135deg);  /* points up when open */
}

.sj-faq-body {
  padding: 0 8px 18px;
  font-size: 14px;
  line-height: 1.6;
  color: #5f6368;
}

/* mobile: full width with small side padding */
@media (max-width: 768px) {
  .sj-faq-wrapper {
    width: 100%;
    padding: 0 16px;
    box-sizing: border-box;
  }
}

.sj-text-center {
text-align:center;
margin-bottom:15px;
}

.sj-faq:last-child {
  border-bottom: none;
}
</style>