This study investigates the effects of a personalized, multidimensional trunk-focused exercise program combined with conventional rehabilitation on postural control, gait, selective motor control, spasticity, activity participation, and quality of life in children with spastic cerebral palsy. Participants will be randomly assigned to an intervention group receiving trunk-focused exercises plus conventional therapy or a control group receiving only conventional therapy over an eight-week period with thrice-weekly sessions (two face-to-face, one home-based via video guidance). The study also incorporates caregiver-supported home exercises facilitated by a web-based platform and mobile application to enhance adherence and sustainability. Outcomes will be assessed pre- and post-intervention to evaluate the program's efficacy in improving motor function and daily activity engagement.