The PC A in the Trust zone is 192.

security policy application direction configuration error, should be outbound

Since the firewall default packet-filter is deny is executed first, the subsequent policies are not executed.

policy source 192.168.3.0 0.0.0.255 configuration error, need to be modified to policy source 192.168.3.0 0.0.255.255

policy destination any configuration error, a clear destination IP address must be established