.concept_bg {
    width: 100vw;
    margin: 0 calc(50% - 50vw);
    height: clamp(160px, 25vw, 300px);
    background-image: url(../img/concept_bg.jpg);
    background-size: cover;
    background-position: center;
    background-color:rgba(255, 255, 255, .4);
    background-blend-mode:lighten;
    position: relative;
}
.page_title {
    font-size: clamp(24px ,3vw, 30px);
    color: #fff;
    text-shadow: .1em .1em .2em #000, 
                 .1em .1em .2em #000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.small_title {
    font-size: clamp(12px , 1.5vw, 20px);
}


#concept .about {
    position: relative;
    margin-bottom: 1em;
}
#concept h2 .jp_text {
    position: absolute;
    top: -1em;
    font-size: .4em;
    font-weight: 600;
}
#concept h2 .dog {
    left: .9em;
}#concept h2 .salon {
    left: 7.5em;
}
#concept h2 .lume {
    left: 15em;
}


.concept_wrapper {
    margin: 5.5em 0;
}
.con_1 {
    margin-top: 0;
}

.text_box {
    margin: 4em 0 1em;
}
.concept_item h3 {
    margin-bottom: 1em;
}

.img_box {
    position: relative;
}
.img_1 {
    width: 100%;
    border-radius: 20%;
    border-top-left-radius: 10%;
    border-bottom-right-radius: 55%;
}
.img_2 {
    width: 50%;
    border-radius: 50%;
    position: absolute;
    bottom: -3em;
    right: -1em;
}

.concept_desc {
    line-height: 1.6;
}
.mt_1em {
    margin-top: 1em;
}

.con_2 .img_1,
.con_2 .img_2 {
    border-radius: 5%;
}

.con_3 img {
    border-radius: 0;
}
.con_3 .text_box {
    margin-top: 1em;
}
.con_3,
.con_3 .concept_item {
    margin-bottom: 0;
}


@media (min-width: 768px) {
    .concept_wrapper{
        max-width: 1200px;
        margin: 0 auto;
    }

    .wrapper_flex {
        display: flex;
        align-items: flex-end;
    }

    .con_1 .img_box {
        align-self: self-start;
    } 

    .con_2, .con_3 {
        margin-top: 4em;
    }

    .con_2 .wrapper_flex {
        flex-direction: row-reverse;
    }

    .concept_item .img_box {
        flex: 1;
    }
    .con_2 .concept_item .img_box {
        flex: .8;
    }
    .con_2 .img_box {
        display: flex;
        flex-direction: column-reverse;
        align-items: flex-end;
    }
    .con_2 .img_1 {
        position: static;
        max-width: 300px;
    }
    .con_2 .img_2 {
        position: static;
        width: 75%;
    }
    
    .text_box {
        flex: 1;
        padding: 1em 0 1em 2em ;
        margin: 0;
        align-self: center;
        line-height: 1.7;
    }
    .text_box h3 {
        line-height: 1.7;
    }

    .con_2 .concept_item .text_box {
        padding: 1em 2em 0 0;
    }
}

@media (min-width: 1024px) {
    section .container {
        max-width: 1200px;
        margin-right: auto;
        margin-left: auto;
    }
    
    .wrapper_flex {
        max-width: 830px;
    }

    .con_2 .wrapper_flex {
        margin-left: auto;
    }

    .concept_wrapper .img_box {
        flex: 1.2;
    }

    .con_2 .concept_item .img_box {
        flex: 1;
    }
    .con_2 .img_1 {
        max-width: 420px;
    }
    .con_2 .img_2 {
        top: -35%;
        max-width: 420px;
    }

    .text_box {
        line-height: 2;
    }
}