一幅居中的正面矢量人像插画，采用现代扁平插画风格。干净的几何形状，平滑渐变，清晰轮廓，极简面部细节，对称构图，柔和肤色，富有表现力的眼…

A centered front-facing vector portrait of a person in a modern flat illustration style. Clean geometric shapes, smooth gradients, crisp outlines, minimal facial details, symmetrical composition, soft skin tones, expressive eyes, subtle shading, and a simple solid-color background. The subject occupies most of the frame from the chest up. Contemporary digital avatar aesthetic, Adobe Illustrator style, high contrast, professional profile picture, sharp edges, vibrant colors, no texture, no photorealism, no background objects, 1:1 aspect ratio, high resolution. For variations like the examples: Avatar 1: Young man with thick swept-back brown hair, full beard, round black glasses, black crew-neck shirt, orange background. Avatar 2: Young woman with short black bob haircut, round gold glasses, black turtleneck and blazer, blue background. Avatar 3: Young man with curly dark hair, short beard and mustache, round black glasses, black shirt, purple background. Avatar 4: Young woman with shoulder-length wavy brown hair, floral bucket hat, white top, delicate necklace, gray background.

一幅居中的正面矢量人像插画，采用现代扁平插画风格。干净的几何形状，平滑渐变，清晰轮廓，极简面部细节，对称构图，柔和肤色，富有表现力的眼睛，细腻阴影，简洁的纯色背景。主体占据画面大部分区域，从胸部以上。现代数字头像美学，Adobe Illustrator 风格，高对比度，专业头像照片，锐利边缘，鲜艳色彩，无纹理，无照片写实，无背景物体，1:1 宽高比，高分辨率。 针对以下示例的变体： 头像 1：年轻男士，浓密的向后梳理的棕色头发，浓密胡须，圆框黑眼镜，黑色圆领衬衫，橙色背景。 头像 2：年轻女士，短款黑色波波头发型，圆框金丝眼镜，黑色高领衫搭配西装外套，蓝色背景。 头像 3：年轻男士，卷曲深色头发，短胡须和小胡子，圆框黑眼镜，黑色衬衫，紫色背景。 头像 4：年轻女士，齐肩波浪卷棕色长发，碎花渔夫帽，白色上衣，精致的项链，灰色背景。