关于这个设计

One flat chest graphic: a chunky retro toggle switch flipped to the right, its rounded knob glowing warm golden, the word "ON" in bold caps inside the switch track. Arched above the switch, the headline "NANA MODE" in very large thick varsity block caps, aqua with a coral drop shadow. Under the switch a straight bold line reads "ALWAYS ON SINCE 2015" in smaller but still thick caps. A few tiny radiating sparkle lines around the knob. Text, each spelled correctly and appearing exactly once: "NANA MODE", "ON", "ALWAYS ON SINCE 2015". Style: bold retro flat-vector, thick clean outlines, aqua, coral and warm golden palette, print-ready. On the black shirt, no pure white anywhere — all light strokes and fills are warm cream, high contrast, print-ready.