.resizesa img.rounded {
    border-radius: 30px !important;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 或 contain，依需求 */
}

.resizesa {
    height: 0;
    width: 900px;
    padding-bottom: 506px;
    /* 16:9 比例 = 9/16 = 0.5625 */
    position: relative;
    overflow: hidden;
    left:50%;
    margin-left: -450px;
    
}
h5{
    font-size: 250%
}
.exo-2{
    font-size:123%; 
    margin:2%;
}
@media (max-width: 1024px){
    .resizesa {
        height: 0;
        width: 100%;
        padding-bottom: 56.25%;
        position: relative;
        overflow: hidden;
        left: 50%;
        margin-left: -50%;
    }
}