.cart-summary .cart-checkout-btn {
  color: #fff !important;
}
.table-responsive {
    background: #fff;
    border: 1px solid #edf1f7;
    border-radius: 14px;
}
/* 固定正方形外框 */
.product-main-box {
  width: 400px;        /* 你要多大改這裡 */
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.5);
  overflow: hidden;
}

/* 圖片自動縮放、不裁切 */
.product-main-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  cursor: pointer; /* 讓使用者知道可以點 */
}

/* 全畫面 overlay */
.img-fullscreen {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.85);
  z-index: 9999;
  justify-content: center;
  align-items: center;
}

/* 全畫面裡的圖 */
.img-fullscreen img {
  max-width: 95vw;
  max-height: 95vh;
  object-fit: contain;
  background: #000;
}

/* 關閉按鈕 */
.img-fullscreen-close {
  position: absolute;
  top: 15px;
  right: 25px;
  font-size: 40px;
  color: #fff;
  cursor: pointer;
}

.no-underline {
  text-decoration: none;
}
.no-underline:hover {
  text-decoration: none;
}