puoi provare con javascript:
codice:
var articles = document.getElementsByTagName("article");
window.addEventListener("resize", function () {
    var i = articles.length, maxHeight = 0;
    while (--i) {
        maxHeight = Math.max(maxHeight, articles[i].offsetHeight);
    }
    i = articles.length;
    while (--i) {
        articles[i].style.height = maxHeight;
    }
});