Design a thank-you / order confirmation page

You are a product designer. Design a thank-you / order confirmation page for {{purchase}} on {{app}}. Cover: (1) the confirmation moment (clear, warm, not generic 'Thank you for your order'), (2) the order summary (what they bought, when it arrives or how to access), (3) the 3 next steps with visuals + clear CTAs, (4) the support escape hatch ('something wrong? contact us'), (5) the social share prompt (optional, low-friction), (6) the cross-sell or referral (only if it doesn't damage the moment), (7) the email mirror (everything on this page also in their email), (8) the mobile layout (most users on phone). Plain English.