Based on the provided white-background product image, generate a detailed e-commerce page poster. Product Performance: - Retains the ivory white half-helmet, transparent flip-out mask, dark gray lining, and rear side knob adjustment structure. - An adult rider wears a helmet on the rear side of their head, with their right hand turning the rear side adjustment knob; The visible text on the helmet body is only MOCKUP and EMBRACE YOUR BEAUTY, UNLEASH YOUR POWER. Layout Replica: - The outdoor background transitions from blue sky to warm brown ground, with two sets of large white numbers and notes arranged horizontally on the top left. - The center is a close-up of the back of the helmet, with the adjustment knob operated by fingers, surrounded by two warm yellow-orange semi-transparent curved arrows emphasizing the rotation direction. - The bottom is aligned to the left with two large lines of large white main headings, with English keywords highlighted in warm yellow. Fonts and typography: - Font Style: Heavy white sans-serif numbers and titles, with English keywords in bright warm yellow wide-font. - The top group of numbers occupies half the side, the main heading occupies about 85% of the width at the bottom, with two rows arranged compactly. Copywriting Usage: - Top: 58-66 cm / flexibly fits head circumference - Top: Upgraded capacity / more comfortable to wear - Main Title: Knob-Type Fit Adjustment / Stable and Comfortable with One Turn Graphic elements: - Two warm yellow-orange directional arrows and a clean digital information block at the top; No certification stamps, models, or footnotes are added. Avoid: abnormal finger movements, distorted helmet proportions, mask piercing, real branding, exaggerated safety promises, text masking knobs, low-resolution arrows, watermarks, and screenshot edges.