Use case: stylized-concept. Asset type: premium RAITEC Windows desktop wallpaper. Generate one full-bleed landscape image in 16:9; request 3840x2160 pixels if available. Input image 1 is the supplied official RAITEC logo, a branding reference/insert only. Preserve its exact RAITEC wordmark, crossed symbol, IT Services subline, six triangular facets, original proportions and colors. Use the supplied logo once as a flat crisp small branding insert at lower right, approximately 18% of canvas width, with 6% right margin and 13% bottom margin. Exact text only "RAITEC" and "IT Services". No additional typography. Keep left 40% visually calm for desktop icons and bottom 8% free for a taskbar. CI palette navy #05345d, blue #334f76, slate #516f82 and #91a1af, orange #f7a824 and #faba57, porcelain white. Subtle sophisticated high-end art direction, exquisite materials and lighting. No mockup, no screen frame, no UI, no watermark, no extra logos, no people. A sculptural dune landscape made of ultra-fine matte midnight-blue mineral sand. Two or three broad graceful dune ridges curve across the right two thirds, low camera angle, tactile fine grain, extraordinary restrained side lighting. A thin warm orange sunrise highlight grazes one crest; deep navy shadows and slate-blue tonal contours. No desert sky, no sun disc, no stars. Upper-left and left foreground form a smooth clean navy gradient. Abstract photographic material study, quiet monumental scale, elegant asymmetry. WHITE logo on a calm dark field at lower right.