Create a high-energy Japanese YouTube thumbnail / social media banner in a 16:9 widescreen format, using a dramatic black, white, and electric yellow color scheme with explosive manga-style speed lines, paint-brush textures, glowing arrows, sparks, and a futuristic AI automation atmosphere. The left half is dominated by huge bold Japanese headline typography reading {argument name="main headline text" default="頑張らない SNS展開"}, with the first line in thick white characters on a black brush-stroke background and “SNS” plus the following characters in oversized bright yellow block letters with blac
