슬라이드 배경

Square presentation design resource showcasing four coordinated widescreen slide backgrounds arranged as a clean 2-by-2 preview board. Contemporary corporate visual system using midnight navy, warm ivory, muted teal, and a restrained coral accent; generous blank areas for future titles and charts; subtle geometric arcs, fine grid lines, soft translucent gradients, and consistent margins. No readable text, no company logo, no watermark, no people, no device mockup.