Give the four section pages hero art bands
New section-hero-v1 series in the signal-field style, one per area:
framework (six luminous territories joined by one continuous gold
path), principles (a scattered field resolving into an ordered
constellation), library (receding strata of lit rectangles crossed by a
single gold seam), and aphorisms (the same gold gesture recurring and
deepening across bands of years). Masters at 1536x1024 with focal
structure in the middle band, delivered as 1536x640 and 768x320
AVIF/WebP center crops behind a dark veil, per-file quality tuned to
stay in the home hero weight class.
The heroes ride the hashed-asset pipeline (sectionHeroes map keyed by
page path), render as decorative empty-alt pictures with
fetchpriority=high, and the page-hero--art treatment shifts the four
headers from paper to midnight with gold accents — the home page keeps
its own, more dramatic hero. Tests assert each page carries its own
band and the home page carries none.
