Supplementary Material

The adjacency matrices (Supplementary Tables S1 and S2), which were constructed based on expert validation, encode the directly confirmed influences between factors (1 for presence, 0 for absence). These matrices serve as the basis for constructing the reachability matrices (Supplementary Tables S3 and S4), which indicate whether an element can reach another, directly or indirectly, within the system (1 for reachable, 0 otherwise). Hierarchical partitioning (Supplementary Tables 5 and 6) was performed by iteratively comparing the reachability and antecedent sets of each factor, extracting hierarchical levels until the structure for all elements was established.

基于专家验证构建的邻接矩阵（adjacency matrices）（补充表S1与S2），表征了各因素间经直接确认的影响关系，其中“1”代表存在影响，“0”代表无影响。此类邻接矩阵可作为构建可达矩阵（reachability matrices）的基础，可达矩阵（补充表S3与S4）用于表征系统内某元素能否通过直接或间接路径抵达另一元素，其中“1”代表可达，“0”代表不可达。通过迭代比较各因素的可达集与先行集，开展层级划分（hierarchical partitioning）（补充表5与6），直至完成所有元素的层级结构构建。