<?
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/header.php");
$APPLICATION->SetTitle("");
?>.news-detail__picture {
    margin: 25px 0 30px;
}

.news-detail__picture img {
    display: block;
    width: 100%;
    height: auto;
}

.news-detail__gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    width: 100%;
    margin-top: 35px;
}

.news-detail__gallery-item {
    display: block;
    min-width: 0;
    overflow: hidden;
}

.news-detail__gallery-item img {
    display: block;
    width: 100%;
    height: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

@media (max-width: 767px) {
    .news-detail__gallery {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

.news-date-time {
    display: block;
    margin: 24px 0 20px;
    font-size: 14px;
    color: #8a8a8a;
    font-weight: 500;
}
.news-detail__preview {
    margin-bottom: 25px;
}

.news-detail__text {
    margin-top: 20px;
}

.news-detail__text p {
    margin: 0 0 18px;
    line-height: 1.7;
}
<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/footer.php");?>