.slider .item-first {
    background-image:
        linear-gradient(90deg,
            rgba(7, 30, 66, .88),
            rgba(7, 30, 66, .45)),
        url('../images/slider/slider-01.webp');
}

.slider .item-second {
    background-image:
        linear-gradient(90deg,
            rgba(7, 30, 66, .86),
            rgba(7, 30, 66, .42)),
        url('../images/slider/slider-02.webp');
}

.slider .item-third {
    background-image:
        linear-gradient(90deg,
            rgba(7, 30, 66, .86),
            rgba(7, 30, 66, .42)),
        url('../images/slider/slider-03.webp');
}