Luminous Christmas Tree Particle Light Field

Professional Christmas greeting poster, vertical, particle light field. [Colors] Emerald #1F7A46 ground grading to lime #8CCB4A at the tree core, pale mint #D9F0C4 mist, warm white sparkles, soft ochre at the base. [Layout] A bold wide sans headline stacks at the top left and overhangs the hero; the tree fills the centre as a triangular haze; a thin ribbon spiral coils down through it; a signature block sits low and centred above a footer strip. [Typography] Heavy geometric sans filled with a yellow-green gradient, a slim script accent for the season line, letterspaced small caps and a bracketed year at the top right. [Subject] A Christmas tree rendered as a spray of luminous particles, densest at the apex and dissolving at the skirts, with two white deer leaping across the middle and a star burning at the tip. [Lighting & mood] Foggy backlit haze, high-key green bloom, serene and weightless. [Details] Four-point sparkles, drifting bokeh dots, a fine light trail outlining the tree, faint footprints of light on the ground; text limited to "MERRY CHRISTMAS". Finish: particle-and-light gradient.