Hi,
don't look at the other settings of aip. There are many other features which I implemented which a totally independent of each other
.
If you don't have access to the other site show_part_of_iframe is the right way to go.
What I don't understand is the extra css.
3. One issue can be - does the other site render something different for e.g. Android? AIP has an internal browser detection where you can select different viewport with different devices. Maybe this is the way to go for you.
4. I don't understand. A shortcode in Wordpress is displayed in the post. What would you expect?
Best, Michael