Digital Health Education to Improve Cardiovascular Health Across Different Socioeconomic Groups: e-DUCASS Advance

Inclusion Criteria: * Age 12 to 79 years. * Provision of written informed consent. For participants younger than 18 years, written informed consent from a parent or legal guardian and assent from the participant, when appropriate, are required. * Both healthy individuals and individuals with stable medical conditions are eligible. No specific disease or cardiovascular risk factor is required for participation. Exclusion Criteria: * Life expectancy of less than 5 years. * Inability to complete the study intervention or scheduled study procedures, either independently or, when applicable, with support from a parent, legal guardian, or household member. * Serious or unstable medical conditions that could limit participation, follow-up, or survival, including hypertension or diabetes with target-organ damage affecting survival, disabling clinical manifestations of cerebrovascular disease, severe psychiatric illness, advanced chronic kidney disease, chronic liver disease, cancer under active treatment, severe or very severe chronic obstructive pulmonary disease, endocrine disease at risk of decompensation, or clinically significant chronic gastrointestinal disease.