Hi Muriel,
Thanks for reaching out.
Replicating the header responsive of the Pro theme is a tricky thing because every time the window size changes it also automatically change the size of the headline. I suggest that we will just fix the headline on your mobile view by adding this code in Pro > Theme Options > CSS.
@media(max-width: 767px) {
.page-id-113 .vc_custom_heading {
font-size: 48px !important;
}
}
Or you could try creating a Global Blocks and create your headline using Pro elements and just copy the Global Blocks shortcode in your Recipes page using the WP Bakery editor.
Please note that custom CSS code is outside the scope of our support. Issues that might arise from the use of custom CSS code and further enhancements should be directed to a third-party developer.
Hope that helps.
Thank you.