Colorful Low-Saturation 3x3 Transportation Icon Matrix AI Image Prompt

Flat, detailed, and high-quality icons with colorful low-saturation tones; elements feature translucent gradient layers and three-dimensional texture, suitable for large-screen infrastructure scenes. A total of 9 icons are arranged in a 3x3 matrix, each closely following the core element of its scene for precise expression. Specific structures: bridge, slope, tunnel, service area, toll station, charging pile, maintenance station, monitoring station, rescue point. Visual features: cute and fresh, harmonious and unified colorful low-saturation palette; the colorful layers enhance the professional feel of the scene, suitable for smart management interface navigation scenes, meeting high-recognition and modern visual needs, on a pure black background.