Hello @xoa,
I checked your site, and it seems that the select box border radius is not working properly in Safari. I would suggest you please go to the Select box input element ->Customize ->Element CSS.
Add this custom CSS code
$el.cs-input{
-webkit-appearance: none;
appearance: none;
-webkit-border-top-left-radius: 100px;
-webkit-border-top-right-radius: 100px;
-webkit-border-bottom-left-radius: 100px;
-webkit-border-bottom-right-radius: 100px;
border-top-left-radius: 100px;
border-top-right-radius: 100px;
border-bottom-left-radius: 100px;
border-bottom-right-radius: 100px;
}
The purpose of providing custom CSS is to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector. If you have no idea about coding, you can subscribe to One, where customization questions are answered.
Hope it helps.
Thanks