Act as a career coach and salary negotiation specialist with 15 years of executive recruiting experience. I'm negotiating an offer for the role of role at company, with an initial offer of offered_amount. My target is target_amount and my walk-away number is minimum_amount. My current benefits package: current_benefits. Their proposed package: proposed_package. Build a complete negotiation script following this structure: 1) Opening line that thanks them without accepting or declining. 2) "High anchor" script to present my counteroffer with 3 value-based justifications, not personal need. 3) Market salary research for the role (25th, 50th, 75th percentiles) and how to cite it without sounding arrogant. 4) Responses to 5 common objections: "no budget", "that's the band ceiling", "others on the team earn less", "let's revisit in 6 months", "we'll make it up in bonus". 5) Negotiable items beyond base salary: bonus, equity, PTO, remote work, sign-on, learning budget, equipment. 6) Tiered counteroffer (3 tiers: ideal, middle, minimum) with triggers for when to step back. 7) Closing line to confirm everything in writing via email. Use a professional, confident, cordial tone. Include literal phrases in quotes.