Trigger button + slide-out panel. The panel body embeds content
elements via sflg_drawer_content (Collection, foreign_table=tt_content)
— editors create/edit whatever CE fits inline: the real form plugin for
a contact drawer, an image slider CE for a lodge drawer, plain text for
a testimonial, etc. Rendered via content-blocks' own {data._grids.*}
mechanism (same method used for the hero-search element) — no custom
TypoScript needed; page.typoscript's "page-content" dataProcessing
keeps these children from also rendering as loose page content.
header/subheader/bodytext cover the shared intro (title/eyebrow/text)
above that content.