This is a great British Library article – it reads almost like a how-to checklist to write Gothic-infused romantic suspense like AFTER THE WINTER! How persistent these conventions are, I note while rereading Daphne duMaurier’s REBECCA, and I would add a few other motifs on a smaller scale to the article’s: a child in peril, dramatic weather, disguise and switched identities, and let us not forget menacing and/or intellectually-compromised lower orders. All told, the Gothic sensibility is just remarkable in its persistence, found in everything from television crime drama (MARCELLA) to heaps of detective stories (Margaret Millar), to Ontario domestic Gothic (Alice Munro). Somewhere on the web I even found a funny take on a sub-genre, Southern Gothic.
https://www.bl.uk/romantics-and-victorians/articles/gothic-motifs