Hero layout variants are defined per CE using the fields tx_heroitem_layout and tx_heroitem_bg_style ; header styles are controlled globally via Site Settings:
tx_heroitem_layoutcenter, start, end, full
tx_heroitem_bg_styleimage-cover, image-decorative, gradient, solid-primary, solid-dark, default
tx_heroitem_color_invertedEnable light text on a dark background
heroButtons(inline)Foreign table records with label, link, variant (primary/light/outline), icon
heroMetaItems(inline)Trust items below the buttons (label + icon)
navigation.main.menuTypeRendering engine for the main navigation (smartmenus, bs5, mmenu)
header.layoutStandard / Centered / Transparent / Sticky