三十天身材蜕变

同一位男子的前后对比封面：左边在昏暗灰光下显得松垮、含胸驼背，右边在明亮暖光下肌肉线条分明，绷紧肌肉、自信满满。一支写着「30天」的发光白箭头从左扫向右。顶部是巨大标题「身材蜕变」，黄黑撞色，健身那侧旁边配一个绿色上箭头。戏剧化的前后打光，激励感强，强对比的健身成果氛围。

Side-by-side thumbnail of the same man: left in dim gray light looking soft and slouched, right in bright warm light with defined muscles, flexed and confident. A glowing white arrow labeled '30 DAYS' sweeps from left to right. Huge text 'BODY TRANSFORMATION' in yellow and black across the top, a green up-arrow beside the fit side. Dramatic before-and-after lighting, motivating, high-contrast fitness-result energy.