A 28-year-old man is brought to the emergency department 2 hours after a flame burn injury to his trunk and both upper limbs while working in a factory. On examination, he has erythema with blistering on the anterior chest, abdomen, and both arms. His vital signs are: HR 110/min, BP 100/65 mmHg, RR 22/min. Urine output is 0.3 mL/kg/hr. Using the Rule of Nines, the estimated total body surface area (TBSA) burned is 36%. Which of the following is the most appropriate immediate fluid resuscitation strategy?