/* 圖片裁切 */
.boximg1x1 {
    overflow: hidden;
    width: 100%;
    padding-top: 100%;
    position: relative;
}

.boximg1x1 img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.boximg1x2 {
    overflow: hidden;
    width: 100%;
    padding-top: calc(2 / 1 * 100%);
    position: relative;
}

.boximg1x2 img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.boximg2x1 {
    overflow: hidden;
    width: 100%;
    padding-top: calc(1 / 2 * 100%);
    position: relative;
}

.boximg2x1 img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.boximg4x5 {
    overflow: hidden;
    width: 100%;
    padding-top: calc(5 / 4 * 100%);
    position: relative;

}

.boximg4x5 img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.boximg5x4 {
    overflow: hidden;
    width: 100%;
    padding-top: calc(4 / 5 * 100%);
    position: relative;
}

.boximg5x4 img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.boximg16x9 {
    overflow: hidden;
    width: 100%;
    padding-top: calc(9 / 16 * 100% + 45px);
    position: relative;
}

.boximg16x9 img {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    object-fit: cover;
}