.b-about {
    background: #F9F9FA;
}
.b-about .b-section__description {
    width: 760px;
}
.b-about__flex {
    display: flex;
    align-items: center;
    justify-content: space-between;

    margin: auto;
    max-width: 1000px;
    width: 100%;
    padding: 30px 0;
    border-bottom: solid 1px #CFD4DC;
}
.b-about__flex:last-child {
    border: none;
}
.b-about__text {
    order: 0;
    width: 414px;
    font: 16px/28px 'Open Sans', sans-serif;
}
.b-about__text > h3{
    margin-bottom: 20px;
}
.b-about__flex:nth-child(2n) > .b-about__text {
    order: 1;
}
.b-about__img {
    order: 1;
    width: 546px;
    aspect-ratio: 546/460;
    background: 0 0 / 100%;
    cursor: pointer;
}
.b-about__flex:nth-child(2n) > .b-about__img {
    order: 0;
}
h3 {
    font: 700 24px/36px 'Open Sans', sans-serif;
    color: #1B222F;
}
.b-section__description {
    margin: auto;
    font: 16px/28px 'Open Sans', sans-serif;
    text-align: center;
    color: #575C63;
}
.b-about .b-section__description {
    width: 760px;
}
.mobile .b-section__description {
    max-width: 100%;
}

@media (max-width: 1024px) {
    .mobile .b-section {
        padding: 45px 15px;
    }
}
@media (max-width: 610px) {
    .mobile .b-about__flex:nth-child(2n) > .b-about__text {
        order: 0;
    }
    .mobile .b-about__flex:nth-child(2n) > .b-about__img {
        order: 1;
    }
    .mobile .b-about__flex {
        flex-wrap: wrap;
    }
    .mobile .b-about__text {
        width: 100%;
    }
    .mobile .b-about__img {
        max-width: 546px;
        width: 100%;
    }
}
.b-about__preloader {
    display: none;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1700;
    width: 100%;
    height: 100%;
    padding: 70px;
    background: #0000007f url("../gif/spinner.gif") center / 250px 125px no-repeat;
    text-align: center;
    overflow: auto;
}
.mobile .b-about__preloader {
    padding: 10px;
}
.b-about__full-img {
    max-width: 100%;
}