.swiper.product-slider:not(.swiper-initialized) {
    overflow: hidden;
    max-height: 420px;
}
.swiper.product-slider:not(.swiper-initialized) {
    overflow: hidden;
    position: relative;
}
.swiper.product-slider:not(.swiper-initialized):before,
.swiper.product-slider:not(.swiper-initialized):after {
    content: '';
    position: absolute;
    z-index: 3;
    display: block;
}
.swiper.product-slider:not(.swiper-initialized):before {
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
}
.swiper.product-slider:not(.swiper-initialized):after {
    width: 48px;
    height: 48px;
    border: 5px solid #FFF;
    border-bottom-color: var(--red-color);
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
    z-index: 5;
    left: calc(50% - 24px);
    top: calc(50% - 24px);
}