"I Survived 100 Days" 是一个挑战类视频标题，采用醒目的缩略图风格。亮黄色窄体大写字母加粗黑描边叠在左边，右边是一个拿斧头的背包客剪影，站在原木棚屋旁，远眺日落时雾气缭绕的群山。换成你自己的挑战标题即可。

Create a complete 16:9 YouTube survival-challenge thumbnail, designed to remain instantly readable at phone size. Render only this exact copy, with no added text: “I SURVIVED 100 DAYS”. Set it in two stacked lines, “I SURVIVED” above “100 DAYS”, as the dominant focal point across the left two-thirds of the frame. Use ultra-heavy, compact, near-square display letterforms with minimal stroke contrast and tight spacing; fill the letter faces with saturated thumbnail yellow (#FFE500), surround every letter with a very thick, clean black outline, then add a short hard black extrusion shadow for separation. Keep counters open and edges crisp. Behind and to the right of the title, show a small but clear survival-game scene: a lone survivor in silhouette beside a rough timber shelter, holding a simple tool, on a rocky forest edge with a dim cold-blue night sky and a narrow warm dawn glow at the horizon. The scene is secondary and dark, with no busy detail behind the letters. Add a few large, simple angular rock and pine silhouettes, not particles or interface graphics. High-contrast directional rim light catches the survivor and shelter; controlled atmospheric haze stays confined to the far background. Strong foreground/background separation, polished digital thumbnail illustration, sharp edges, saturated yellow against charcoal and deep blue. Keep all lettering and the key silhouette inside a generous safe margin. No logos, watermarks, icons, badges, or other lettering.