Salary Negotiation Script

Help me negotiate my salary for [ROLE] at [COMPANY]. Offer received: [OFFER]. Market rate I found: [MARKET_RATE]. My experience: [YEARS] years. Key leverage points: [STRENGTHS]. Write: 1) An email response to the offer (professional, positive, firm), 2) A verbal script for the negotiation call (word-for-word), 3) Responses to common pushbacks ('budget is fixed', 'we can revisit in 6 months'), 4) A counter-offer strategy with walk-away number.