#header_parent {
    font-family:"Yu Gothic", "游ゴシック", YuGothic, "游ゴシック体", "ヒラギノ角ゴ Pro W3", "メイリオ", sans-serif;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    padding: 1.0vh 2.6vw;
    position: relative;
    justify-content: space-between;
}

.header_logo {
    width: 25vw;
    height: 100%;
    margin: 0.2vw;
    vertical-align: middle;
    margin-top: 1rem;
}
.head_btn{
    float: right;
    font-weight: bold;
    font-size: 1.4rem;
    height: 4rem;
    color:#52958b;
    cursor: pointer;  
    background: rgb(255, 255, 255);
    border: 2px solid #52958b ;
    border-image: initial;
    padding: 0vh 2vw;
    outline: 0;
    border-radius: 3rem;
    margin: 1.0vh 0vw;
    vertical-align: middle;
}
.contact {
    line-height: 2.8rem;  
    cursor: pointer;
}

.contact_text{
    font-size: 1rem;
    font-weight: bold;
}
.content{
    color: #52958b;
    font-weight: bold;  
    text-decoration: none;
}

.contact a{
    text-decoration: none;
}
.head_btn:hover{
    /* box-shadow: 0 0 12px; */
    border-color:#ace0b0;
}
.head_btn:hover .content{
    color: #ace0b0;
}

.head_btn:active{
    transform: scale(0.9);
    box-shadow: none;
}
.db_performance{
    margin-right: 0.5rem!important;
    line-height: 1.3rem; 
    cursor: pointer; 
}
.db_performance a{
    text-decoration: none;
}
.db_performance:after {
    content: "";
    display: inline-block;
    width: 2.0vw;
    height: 1.6vw;
    background: url("../image/ourIcon.png") no-repeat;
    background-size: contain;
    vertical-align: middle;
}
.content:visited{
    color: #52958b;
}


@media (max-width: 768px)
{
    #header_parent {
        padding: 0.4vh 2.0vw;
    }

    .header_logo{
        max-width: 45%;
    }

    .contact {
        line-height: 2.0rem;
        font-size: 1.2rem;
        margin: 0.8vh 0vw;
    }
    .db_performance{
        line-height: 1rem;
        font-size: 0.6rem;
        margin: 0.8vh 0vw;
        padding-top: inherit;
    }
    .db_performance:after {
        width: 4vw;
        height: 4vw;
    }
    .contact_text{
        font-size: 0.5rem;  
    }
}

@media (max-width: 512px){
    #header_parent {
        max-width: 100%;
        padding: 0.5vh 2.6vw;
    }

    .header_logo{
        width: 40vw;
    }

    .contact {
        /* float: none; */
        line-height: 1.2rem;
        font-size: 0.6rem;
        margin: 0.1vh 0vw;
    }
    .db_performance{
        line-height: 1rem;
        font-size: 0.6rem;
        margin: 0.1vh 0vw;
        padding-top: inherit;
    }
    .db_performance:after {
    width: 6vw;
    height: 6vw;
    }
    .contact_text{
        font-size: 0.5rem;  
    }
}