.yichen-photo-wall2 {
    padding: var(--component-gap) 0;
    position: relative;
}

.yichen-photo-wall2::after{
    content: '';
    position: absolute;
    top: 39%;
    left: 0;
    width: 100%;
    height: 37%;
    background-color: var(--color-primary);
    z-index: -1;
}

.yichen-photo-wall2__grid {
   display: flex;
   flex-wrap: wrap;
   gap: 20px;
   justify-content: center;
   align-items: center;
}

.yichen-photo-wall2__item {
    width: calc((100% - 20px) / 2);
}

.yichen-photo-wall2__item:nth-child(1),
.yichen-photo-wall2__item:nth-child(2) {
    aspect-ratio: 590 / 440;
}

.yichen-photo-wall2__item:nth-child(3),
.yichen-photo-wall2__item:nth-child(4) {
    aspect-ratio: 590 / 330;
}



.yichen-photo-wall2__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}