This paper addresses the detuning and performance degradation issues in wireless power transfer (WPT) systems caused by the coupled effects of eddy currents and parasitic capacitance networks when metallic components are in proximity. A circuit model incorporating distributed electromagnetic coupling and a corresponding resonant parameter configuration method are proposed. Firstly, a comprehensive distributed parameter model is established, which systematically accounts for eddy current effects and three distinct types of distributed capacitance, namely coil-to-shield, inter-coil, and inter-shield capacitance. Through rigorous equivalent circuit transformation, the electromagnetic field coupling paths are effectively simplified into a lumped Π-type equivalent circuit, from which analytical expressions for the modified equivalent self-inductance are subsequently derived, thereby quantitatively clarifying the influence of distributed capacitance parameters and eddy current effects on the equivalent self-inductance. Subsequently, the impact of distributed electromagnetic coupling parameters on the system input impedance characteristics is analyzed. Based on this analysis, and under the conditions of series resonance on the receiving side and zero phase angle on the transmitting side, the parameter configuration expressions for an LCC-S compensation network are derived. Finally, to validate the proposed method, both simulation and experimental platforms are constructed with a system operating frequency of 85 kHz. The simulation and experimental results demonstrate that when resonant parameters are tuned solely for the coil without considering the aluminum shield, the system becomes detuned upon introduction of the shield, exhibiting a phase difference of 50° between the inverter voltage and current. In contrast, employing the proposed parameter configuration method restores resonant operation, reducing the phase difference to less than 5°. Experimental results further confirm that the tuned system achieves a transmission efficiency of 95.1% at a power level of 500 W under perfectly aligned conditions. Even with a lateral misalignment of 90 mm at the receiver side, the system maintains a transmission efficiency exceeding 82%. These results validate the correctness of the proposed model and parameter configuration method in metallic environments and demonstrate its excellent misalignment tolerance.