“BLOCK”是使用 FontVibe AI 创作的3D 立体粗体文字效果。厚重的方块大写字母带深度挤出，每个字母一种亮面糖果色，顶光让高光滚过圆润边角，彩色倒影落在地面上。

Massive chunky 3D block letters with heavyweight extruded presence — thick uniform extrusion depth of 50-60% of letter height. Front face finished in ultra-glossy lacquer, catching directional key light with natural specular reflections that graduate from bright highlight to deep saturated color — the surface quality of hard candy coating or high-gloss toy paint. Side extrusion planes in a noticeably darker shade of the same hue, creating crisp face-to-depth contrast that reads immediately as three-dimensional volume. Adjacent letters each carry a different vivid saturated color, maximizing chromatic contrast across the word — no two adjacent letters share the same hue family. Hard sharp corner edges where face meets extrusion, no beveling. Long dramatic cast shadows at consistent 45-degree angle, shadow depth approximately 40-50% of letter height. Strong directional key light from upper left. Bold, high-contrast, maximum visual impact. A YouTube video thumbnail mockup displayed on a MacBook Pro laptop screen — laptop open on a tidy wooden desk, soft warm desk lamp lighting, dark studio background behind the laptop. The YouTube thumbnail on screen features "BLOCK" as the video title in massive colorful 3D candy-surface block letters — B cherry red, L electric blue, O sunshine yellow, C lime green, K hot orange — filling 70% of the thumbnail width, centered over a vibrant gradient background on screen. Letters on screen have full visible 3D depth and natural candy gloss. Laptop screen glow illuminates the desk surface with warm light. Desk foreground slightly soft, laptop and screen display are sharp focal point. Realistic product mockup quality — 16:9 content creator workspace scene.