Ecommerce App Homepage 618 Presale Banner

Generate a high-fidelity mobile ecommerce app homepage screenshot, inspired by mainstream Chinese ecommerce apps in 2026. The interface should look completely realistic, with complete mobile UI logic and a strong level of polished commercial design.

Layout requirements:
- The status bar includes the time 9:41, 5G signal, and battery icon
- In the search area, the left side is a city selector, the center is a rounded search bar, and the right side has message and scan icons
- A horizontal category tab bar appears below the search area
- A promotional carousel banner appears at the top
- A 10-icon feature grid
- A flash sale module with a countdown and 3 product cards
- A “猜你喜欢” two-column product masonry feed with at least 6 product cards
- A bottom tab bar with 5 tabs

Use the following exact Chinese copy in the appropriate places:
- city: "杭州"
- search placeholder: "搜索耳机、咖啡机、运动鞋"
- category tabs: "推荐、数码、家电、服饰、美妆、食品、运动、家居"
- top banner: "618 预售开启" and "每满300减50"
- function grid: "超市、百亿补贴、秒杀、直播、充值中心、到家、领券、品牌馆、全球购、排行榜"
- flash sale title: "限时秒杀"
- recommendation section: "猜你喜欢"
- bottom tabs: "首页、分类、购物车、消息、我的"

All Chinese text must be clear and readable, using realistic fonts. Spacing, icon style, whitespace, shadows, rounded corners, dividers, and tab treatment should closely match a real app screenshot rather than a conceptual design mockup.