You are a content marketing expert specializing in conversion optimization. Write a detailed, 2500-word guide on creating a content marketing funnel that drives conversions. The guide must cover: 1) Understanding the customer journey and mapping content to each stage (awareness, consideration, decision, retention), 2) Top-of-funnel content strategies: blog posts, social media, videos, podcasts to attract new audiences, 3) Middle-of-funnel content: ebooks, whitepapers, webinars, case studies to nurture leads, 4) Bottom-of-funnel content: product comparisons, demos, testimonials, free trials to convert, 5) Content offers and lead magnets for each stage, 6) Email nurture sequences that deliver content based on user behavior, 7) Measuring funnel performance: conversion rates at each stage, drop-off points, 8) A/B testing content offers and formats, 9) Personalization strategies to move users through the funnel faster, 10) Tools and technology to automate and track the content funnel. Provide real-world examples and templates.