Create a heavy-class mech named "Iron Widow", weighing 88 tons. Its imposing frame features reinforced armor, a broad stance, and a menacing posture. Both arms hold dual 1000 kg and 400 kg hardpoints for massive weaponry. Each shoulder is equipped with a 400 kg mount. Legs are robust, with two 400 kg hardpoints on each side for support systems or mobility upgrades. Four internal modules are integrated. The torso is rotatable. No hardpoints on the back or center torso. Hardpoints should be clearly visible as attachment interfaces, without any weapons. Design style is semi-realistic, with clean, blueprint-style technical detail. Neutral white background, no ground or labeling.