<style>
/*Для блока BF306*/
.t274__wrapper {
background-attachment: fixed;
background-size: 1500px;
}
/*Для блока BF309N*/
.t722__content {
background-image: url(https://clck.ru/DCZ8b);
background-attachment: fixed;
background-size: cover;
background-blend-mode: soft-light ;
}
</style>