div.stretchy-wrapper{ width: 100%; /*padding-bottom: 56.25%; / 16:9 / position: relative;} div.stretchy-wrapper > iframe{ position: absolute; top: 0; bottom: 0; left: 0; right: 0; color: white; font-size: 24px; text-align: center;} 蛋包飯升級教學扭紋蛋包飯日本廚師將他稱為旋轉禮服蛋包飯