.common-footer{
    max-width: 980px;
    margin: 0 auto;
    padding: 60px 0 0;
}

.head-border {
    font-size: 28px;
    display: flex;
    align-items: center;
    margin: 0 auto 20px;
}
 
.head-border:after {
    content: "";
    height: 1px;
    flex-grow: 1;
    background-color: #666;
}
 
.head-border:before {
    margin-right: 1rem;
}
 
.head-border:after {
    margin-left: 1rem;
}


.other-box{
    display: flex;
    flex-wrap: wrap;
}

.other-box li{
    width: 23%;
    margin: 0 0 30px;
}

.other-box li:not(:nth-child(4n)){
    margin-right: calc(8% / 3);
}

.other-box li a:hover{
    opacity: 0.8;
    transition: 0.3s;
}

.other-txt{
    font-size: 14px;
    margin: 10px auto 0;
}

.other-btn-box{
    width: 90%;
    margin: 0 auto;
    display:flex;
    justify-content: center;
}

.other-btn{
    width: 100%;
    max-width: 300px;
}

.other-btn a{
    display: block;
    border: 1px solid #000;
    padding: 0.7em;
    text-align: center;
    margin: 0 10px 20px;
}

.other-btn a:hover{
    color: #fff;
    background-color: #000;
    transition: 0.3s;
}

@media screen and (max-width: 1040px){
    .common-footer {
    padding: 30px;
}
}

@media screen and (max-width: 580px){
    .other-box li{
        width: 46%;
    }

    .other-btn-box {
        display: block
    }

    .other-box li:not(:nth-child(4n)){
        margin-right: 0;
    }

    .other-box li:not(:nth-child(2n)){
        margin-right: 8%;
    }

    .other-btn{
        margin: 0 auto;
    }

    .other-btn a {
        margin: 0 auto 20px;
    }
}