.subpage_explanation {
    width: 62.5vw;
    max-width: 1200px;
    margin: 2vw auto;
    text-align: center;
    font-size: min(1vw, 20px);
    line-height: 2;
}

.contact_article {
    width: 62.5vw;
    max-width: 1200px;
    margin: 0 auto 6.7vw auto;
}

.contact_inn {
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.web-contact_sec,
.phone-contact_sec {
    background-color: white;
    padding-top: 5.2vw;
    padding-bottom: 5.2vw;
    border-radius: 2.6vw;
    text-align: center;
}

.web-contact_sec {
    margin-bottom: 2.86vw;
}

.web-contact_sec h2,
.phone-contact_sec h2 {
    display: inline-block;
    color: #00a592;
    font-size: min(1.875vw, 36px);
    font-weight: 600;
    position: relative;
    margin-bottom: 5vw;
}

.web-contact_sec h2::before {
    content: '';
    position: absolute;
    background-image: url(../img/subpage/web_mark.png);
    background-size: cover;
    width: 1.875vw;
    height: 1.5625vw;
    left: -3vw;
    top: 30%;
}

.phone-contact_sec h2::before {
    content: '';
    position: absolute;
    background-image: url(../img/subpage/phone_mark.png);
    background-size: cover;
    width: 1.4vw;
    height: 2.1vw;
    left: -3vw;
    top: 20%;
}

.contact_box {
    width: 50%;
    padding-top: 2vw;
    padding-bottom: 2vw;
    display: flex;
    flex-direction: column;
}

.contact_box:first-child {
    border-right: 1px solid #4d4d4d;
}

.contact_box_ttl {
    font-size: min(1.875vw, 36px);
    font-weight: 600;
    margin-bottom: 3vw;
}

.phone-contact_sec .contact_box a,
.phone-contact_sec .contact_box .fax {
    font-size: min(1.875vw, 36px);
    font-weight: 600;
}

.contact_box_txt {
    font-size: min(1vw, 17px);
    line-height: 2;
}

.contact_box_btn {
    margin-top: 3.3vw;
}

.contact_box_btn a {
    padding: 1.5625vw 2.2vw;
    background: linear-gradient(270deg, #29abe2 0%, #00a592 100%);
    background-position: 1% 50%;
    background-size: 200% auto;
    transition: all 0.3s ease-out;
    color: white;
    border-radius: 300px;
    font-size: min(1vw, 20px);
}

.contact_box_btn a:hover {
    background-position: 99% 50%;
}

@media screen and (max-width:768px) {
    .subpage_explanation {
        padding-top: 40vw;
        width: 90vw;
        font-size: max(3.2vw, 12px);
        color: white;
    }

    .contact_article {
        width: 90vw;
        margin: 0 auto 13.4vw auto;
    }

    .contact_inn {
        flex-direction: column;
    }

    .contact_box {
        width: 100%;
        padding-bottom: 10vw;
    }

    .contact_box:first-child {
        border-right: 0px solid #4d4d4d;
    }

    .contact_box_ttl {
        font-size: max(5.3vw, 20px);
    }

    .contact_box_txt {
        font-size: max(0.8vw, 14px);
        padding-left: 5vw;
        padding-right: 5vw;
    }

    .web-contact_sec h2,
    .phone-contact_sec h2 {
        font-size: max(5.3vw, 20px);
        margin-top: 10vw;
    }

    .web-contact_sec h2::before {
        width: 3.75vw;
        height: 3.125vw;
        left: -6vw;
        top: 25%;
    }

    .phone-contact_sec .contact_box a,
    .phone-contact_sec .contact_box .fax {
        font-size: max(5.3vw, 20px);
    }

    .phone-contact_sec h2::before {
        width: 2.8vw;
        height: 4.2vw;
        left: -6vw;
        top: 15%;
    }

    .contact_box_btn a {
        font-size: max(1vw, 20px);
        padding: 2vw 5vw;
    }
}