.companylist {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.companyitem {
    width: calc(50% - 10px);
    margin: 0 0 20px;
    padding: 0;
}
.companyitem a{
    display: block;
    position: relative;
}
.companyitem a::before{
    content: "VIEW";
    width: 80px;
    height: 80px;
    background: rgba(0,0,0,.6);
    color: #fff;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all .3s ease-in-out;
}
.companyitem img{
    width: 100%;
}
.companyitem a:hover::before{
    opacity: 1;
}