Based on the provided white background product image, generate a detailed poster for the lightweight sports backpack. The background is a clear blue sky, with soft white clouds at the edges and distant blurred treetops; The image does not retain the original image's additional white screenshot border. On the top left, a large white sans-serif line is used as the title "Light Shoulder Strap / Every Step Feels Free," with two white messages below: "Light Carry / Walk More Comfortably" and "Wide Shoulder Straps / Distribute Shoulder Pressure," without specific weight or size numbers.
Slightly lower in the middle, a hand lifts the black-and-gray color-blocked sporty backpack from the right side. The body is slightly suspended, with the outer flap, central buckle, silver buckle, and widened shoulder strap clearly visible, creating a sense of lightness. Retains the black body, gray plaid flap, external buckle, and side straps, with adjustable straps, pleats, and bag angles. The product originally carried brand information, using only the small woven labels "MOCKUP" and "EMBRACE YOUR BEAUTY, UNLEASH YOUR POWER." The font has an outdoor sporty vibe, avoiding the original brand, parameters, social media tags, watermarks, and excessive projection.
