Landing page v3 - Orbitron/gold/cyan redesign, all sections preserved

Orbitron headings, Inter body, gold/cyan palette, sticky nav,
SVG bridge icons, BG-007 head-to-head comparison, favicon.
axl-swarm live. Partners section. Light/dark toggle.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: dcarranza-axl