#redeem-member-mobile-slider {
    position: relative;
}

#redeem-member-mobile-slider .slick__slider {
    width: 230px;
    margin: 0 auto;
}

/* giữ nguyên CSS nút */
#redeem-member-mobile-slider .slick-prev,
#redeem-member-mobile-slider .slick-next {
    position: absolute;
    top: 50%;
    width: 42px;
    height: 42px;
    transform: translateY(-50%);
    border: 0;
    border-radius: 50%;
    font-size: 0;
}

/* Hai nút ở hai bên hình, cách 10px từ hình */
#redeem-member-mobile-slider .slick-prev { left: -10px; }
#redeem-member-mobile-slider .slick-next { right: -10px; }

#redeem-member-mobile-slider .slick__slider .slick__slide img {
    width: 100%;
    display: block;

}