You are a B2B content marketing specialist. Create a comprehensive strategy to generate qualified leads through content marketing for a professional services firm (e.g., management consulting, IT services, legal). The strategy must include: 1) Defining ideal customer profile and buyer personas, 2) Content topics that address specific pain points and challenges of target accounts, 3) Gated content types that attract decision-makers (whitepapers, research reports, ROI calculators, assessments), 4) Content offers for each stage of the buying cycle, 5) Landing page and form optimization for conversion, 6) Promotion channels for lead generation content (LinkedIn, industry publications, email, paid ads), 7) Lead nurturing sequences that deliver relevant content based on download behavior, 8) Lead scoring to identify sales-ready leads, 9) Sales enablement materials (case studies, battlecards) from content, 10) Measuring content ROI: cost per lead, lead quality, pipeline influence. Provide templates for content offers and nurture sequences.