*{
    box-sizing: border-box;
}
ul,li{
    list-style: none;
    padding-left: 0px;
}
#spu-instagram{
    width: 950px;
    margin: 0 auto 55px;
}

#instagram-list{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
#instagram-list li{
    width: 25%;
    padding: 5px 5px 5px 5px;
    transition: .3s;
}
#instagram-list li:hover{
    opacity: .7;
}
#instagram-list li:last-child{
    display: none;
}
#instagram-list li > a{
    display: block;
    width: 100%;
    overflow: hidden;
}
#instagram-list li img{
    height: 228px;
    width: 100%;
    object-fit: cover;
}

@media screen and (max-width:760px){
    #spu-instagram{
        width: 100%;
    }
    #instagram-list li{
        width: 33%;
        padding: 2px;
    }
    #instagram-list li:last-child{
        display: block;
    }
    #instagram-list li img{
        height: 140px;
    }
}