.js #MainContent > .shopify-section.section-viewport-managed {
  content-visibility: auto;
  contain-intrinsic-size: var(--section-intrinsic-size, 900px);
}

.js #MainContent > .shopify-section.section-viewport-managed.section-viewport-ready {
  content-visibility: visible;
  contain-intrinsic-size: auto;
}

@supports not (content-visibility: auto) {
  .js #MainContent > .shopify-section.section-viewport-managed,
  .js #MainContent > .shopify-section.section-viewport-managed.section-viewport-ready {
    content-visibility: visible;
    contain-intrinsic-size: auto;
  }
}