电子产品闪购横幅

生成一张 1024x1280 像素、4:5 竖版电子产品限时促销横幅。中央为无品牌无线耳机、键盘和移动电源漂浮在深蓝科技背景中。标题「限时闪购」，副标题「FLASH SALE 数码好物」。价格标签「低至 ￥99」，倒计时「还剩 02:18:45」，按钮「立即选购」。所有可见文字为简体中文和人民币价格，不出现英文促销词、真实电商品牌或平台标志、水印或乱码。

A 1440×500 px flash-sale banner for a consumer electronics retailer. Background: near-black with a radial electric-blue glow at center. A floating 3D-rendered wireless headphone in matte midnight-blue with silver accents is the hero product, slightly angled, casting a long neon-blue shadow. Left side: chunky yellow starburst badge with text "FLASH SALE" in black. Headline to the right of product: "30% Off" in oversized bold white numerals, subtext "Today Only — Ends Midnight" in smaller warm white. Bottom-right: vivid yellow rectangular button reading "Shop Now". Accent lines in electric blue frame the product zone. Mood: urgent, tech-forward, high energy. Countdown timer shown as decorative HH:MM:SS display in red at lower-left.