Welcome Email Template

/write
Create a welcome email template for new users/customers.

Company Name: {{companyName}}
Product/Service: {{product}}
Primary CTA: {{primaryCTA}}
Tone: {{tone}}

The email should include:
- Header with logo placeholder
- Welcome headline
- Brief product introduction
- Next steps/getting started
- CTA button
- Support resources
- Social media links
- Footer with unsubscribe

Design principles:
- Email-client compatible
- Mobile responsive
- Clear hierarchy
- Single column layout
- Inline CSS styles
- Image fallbacks

Use table-based layout for email compatibility. Return complete HTML email template.
Return complete, runnable output with clean structure and sensible defaults.
Prioritize readability, accessibility, and maintainability.
!Be concrete and specific; avoid vague language.
!Return only the final output.
>html