draw this anime-style poster featuring several young, cute pandas in military uniforms, with one holding an extra-large black samurai sword, standing next to giant mecha Gundam robots on top of desert ruins. all the characters should be pandas, there should be no humans in the drawing. The background includes mountains and a Japanese countryside, in the style of Hayao Miyazaki's animation and Makoto Shinkai's color scheme. The image is in ultra-high definition resolution with high-quality details, exquisite facial features, full-body portraits, and detailed character illustrations. --sref <https://s.mj.run/5CJMBfh0mYw> --niji 6 --ar 7:10