The main conceptual idea of the text is that Once Caldas defeated Universitario in a match of the Colombian Serie 2025 despite Universitario dominating the first half and creating numerous scoring opportunities. The article highlights: * Universitario's dominance in the first half: They controlled the ball and came close to scoring multiple times. * Once Caldas's decisive second half: They came out strong, changed their strategy and ultimately scored the winning goal. The text emphasizes the contrast between Universitario's missed chances and their opponent's ability to capitalize on opportunities, ultimately leading to Once Caldas's victory.