graph BT B(sys-firewall):::green --> A(sys-net):::red C(personal):::yellow --> B D(sys-vpn):::green --> B E(work):::blue --> D
classDef red fill:#e6194b,stroke:#333,stroke-width:1px,color:#ee classDef green fill:#3cb44b,stroke:#333,stroke-width:1px,color:#ee classDef yellow fill:#ffe119,stroke:#333,stroke-width:1px,color:#aa classDef blue fill:#4363d8,stroke:#333,stroke-width:1px,color:#ee