Where do the graduate's name and honours line go?
In the opening block, beside or just under the graduating sentence: full degree name, classification or honours, institution. It is the first fact people screenshot to send to the relatives who keep asking what she actually studied.
How do we word a limited ceremony without offending people?
Say what the limit is, and separate it from the party everyone can join. Seats in the hall are limited to immediate family, the hall is small, and we are sorry; the lunch after is open to all who want to come. Clarity is kinder than hints.
Does a no gifts line actually get taken seriously?
Usually, especially with a reason or a redirect: no gifts, just a photo with us, or a named charity collection instead. A concrete alternative makes the no believable, and gives generous guests somewhere to put the impulse.
Do the ceremony and the party need separate reply deadlines?
If ceremony seats are decided within the family, only the party needs an RSVP date, and the page should say so. Otherwise guests will assume a lunch reply booked their seat in the hall, and you will be apologising on the day.
Should this be a page or a printed card?
The card announces; the page runs the day. Put a QR or short link on any printed version and let the page hold the schedule, the two addresses, the dress line and the reply, because graduation plans move late and only one of those can be updated.