<style> .sample { overflow: hidden; } .sample img { width: 100%; height: 100%; transform: translateY(-100%); transition: transform .2s; transition-delay: 3s; } .sample:hover img { transform: translateY(0); transition-delay: 0s; } </style> <div class="sample"> <img src="https://placehold.jp/100x100.png"> </div> codepen See the Pen test25-1 by yambe jp (@yambejp) on CodePen. 1-2.課題 一瞬だけ画面にマウスを乗せ、外すと