Generate a detail page poster for the business lightweight backpack based on the provided white-background product images. The background is a cold gray-white geometric space, with a dark gray staircase and a pair of headphones on the left side as commuting tools. A black lightweight backpack leans diagonally against the stairs, with a large blank area left in the upper right as the title area.
Layout and copy: The top right has two large black headings: "Business Casual / Lightweight Travel," with a black rounded capsule label below the title: "Light Storage, Walk Calmly," and a small English "BUSINESS LIGHT TRAVEL" below. A set of tiny English decorative letters is added at the bottom left, which does not affect the main body.
The product maintains a simple black bag shape, double front zippers, a wide lower pocket, and a top handle, allowing adjustment of the bag's curve and zipper position. The product originally included brand information, with only "MOCKUP" and "EMBRACE YOUR BEAUTY, UNLEASH YOUR POWER" in the discreet front position. The font is business-style sans-serific, with a very bold and right-aligned title, narrow English text, and slightly wider spacing. Avoid keeping the earphone brand, original brand, price, watermark, screenshot edges, or text obscuration.
