"PP" 是一张科技测评频道的头像，采用干净的极简风格。两个白色无衬线字母居中放在深色背景上的电光蓝渐变圆形里，一个简单的标志，怎么裁成圆都清晰。可以换成你自己的首字母和品牌色。

Create a finished 1:1 square profile-picture graphic, designed to remain instantly readable when cropped to a 98 × 98 px circle. Center one large, perfectly circular electric-blue gradient disc, occupying about 82% of the canvas and fully inside a generous circular safe margin. Use a smooth cobalt-to-vivid-electric-blue gradient with restrained soft inner illumination; keep the surrounding square corners near-black navy so the circle reads cleanly in platform crops. Place only the exact uppercase text "PP" at the center of the disc. Set it in custom clean geometric sans-serif lettering: bold, uniform strokes, simple open counters, crisp terminals, balanced spacing, no outline, no bevel, no decorative cuts. Render the letters flat pure white with sharp edges and strong contrast against the blue. Keep the initials large and centered, with clear breathing room around them. Minimal composition, no icons, no texture, no patterns, no extra text, no logos, no border, no watermark. High-resolution vector-clean rendering with subtle, even illumination.