Citrus tends to be fleeting, unfortunately, and there's little one can do. Pretty much, one has to reapply as needed through the day.
In the past, some citruses were mixed with an oakmoss base, which helped with longevity (though the perfume wasn't purely citrus after a while, but sort of citrus-mossy). Eau d'Hadrien itself was one of those, as was chanel pour monsieur (regular) and Eau Sauvage. But oakmoss is now restricted so all of them have been reformulated.