[Share] How to change Product Title Text Size on mobile view only

You can use these CSS code (Website Tools > Custom CSS) to change Product Title text size on Mobile View Only.

If code doesn't work, you can send link to product page, I will check again.

#1. Product Title in Product Detail Page

@media screen and (max-width:767px) {
  h1.ProductItem-details-title {
 	 font-size: 18px !important;
  }
}

#2. Product Title in Shop/Category Page

@media screen and (max-width:767px) {
  .products.collection-content-wrapper .grid-main-meta .grid-title {
 	 font-size: 10px !important;
  }
}

#3. Product Title in Cart Page

@media screen and (max-width:767px) {
  a.cart-row-title {
 	 font-size: 10px !important;
  }
}

#4. Product Title in Product Block

@media screen and (max-width:767px) {
  .product-block .productDetails .product-title {
 	 font-size: 10px !important;
  }
}

#5. Product Title in Summary Block

@media screen and (max-width:767px) {
  div.summary-item:has(.summary-price) a.summary-title-link {
 	 font-size: 30px !important;
  }
}

#6. Product Title in Quick View Lightbox

@media screen and (max-width:767px) {
  .sqs-product-quick-view-lightbox .ProductItem-details-title {
  	font-size: 10px !important;
  }
}