.concept {
    position: relative;
    padding: 80px 0 30px
}

.concept::before {
    position: absolute;
    content: '';
    background-image: url(../images/concept/wave.webp);
    background-repeat: repeat-x;
    width: 100vw;
    height: 169px;
    bottom: -169px;
    left: 0;
    z-index: 100;
}

.concept h2 {
    margin-bottom: 90px;
}

.concept .flex {
    margin-bottom: 80px
}
.concept .flex_img {
    width: 680px;
    position: relative;
    z-index: 10;
}
.concept .flex_img img {
    position: relative;
    z-index: 15;
}
.concept .flex_img::after {
    content: '';
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 0;
    background-color: #fff;
    border-radius: 8px;
    width: 100%;
    height: 100%;
}
.concept .flex_txt {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 408px;
    min-height: 436px;
    height: 100%
}
.concept .flex_txt h3 {
    font-size: 3.2rem;
    line-height: 1.5;
    margin-bottom: 20px;
}
.concept .flex_txt h3 div {
    display: block;
    position: relative;
    width: 85px;
    height: 93px;
    margin-bottom: 10px;
    font-size: 2rem;
    line-height: 93px;
    text-align: center;
}
.concept .flex_txt h3 div::before {
    position: absolute;
    content: '';
    background-image: url(../images/common/ttl_parts.webp);
    background-repeat: no-repeat;
    width: 85px;
    height: 93px;
    top: 0;
    left: 0;
}
.concept .flex_txt .common_btn {
    margin: auto 0 0 auto;
    align-self: flex-start
}

.concept_link {
    padding: 270px 0 200px;
    text-align: center
}
.concept_link p {
    margin: 20px auto 50px
}
.concept_link .flex {
    justify-content: space-between;
}
.concept_link .flex a {
    position: relative;
    width: calc(100% / 3 - 20px);
    height: 250px;
    background-repeat: no-repeat;
    background-size: contain;
    border-radius: 8px;
    overflow: hidden;
}
.concept_link .flex a img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}
.concept_link .flex a:hover img {
    transform: scale(1.1);
}
.concept_link .flex a div {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}
.concept_link .flex .bnr01 .common_btn,
.concept_link .flex .bnr03 .common_btn {
    background-color: #F4161B;
    border-color: #F4161B;
}
.concept_link .flex .bnr01 .common_btn:hover,
.concept_link .flex .bnr03 .common_btn:hover {
    background-color: #fff;
    border-color: #F4161B;
    color: #F4161B
}


@media only screen and (max-width: 992px) {
    .concept {
        padding: 60px 0 30px
    }

    .concept::before {
        width: 100%;
        height: 50px;
        bottom: -50px;
        background-size: contain;
    }

    .concept h2 {
        margin-bottom: 40px;
    }

    .concept .flex {
        flex-direction: column;
        margin-bottom: 40px
    }
    .concept .flex_img {
        width: 100%;
        margin-bottom: 30px
    }
    .concept .flex_img::after {
        top: 8px;
        left: 8px;
    }
    .concept .flex_img img {
        width: 100%;
    }
    .concept .flex_txt {
        width: 100%;
        min-height: unset;
    }
    .concept .flex_txt h3 {
        display: flex;
        align-items: center;
    }
    .concept .flex_txt h3 div {
        margin-right: 10px;
    }
    .concept .flex_txt .common_btn {
        margin: 10px 0 0 auto
    }

    .concept_link {
        padding: 120px 0 100px
    }
    .concept_link .flex {
        flex-direction: column;
    }
    .concept_link .flex a {
        width: 100%;
        margin-top: 16px;
    }
    .concept_link .flex a div {
        max-width: 90%;
    }
}
@media screen and (min-width:560px) and (max-width: 991px) {
    .concept::before {
        height: 80px;
        bottom: -80px;
    }
}