@charset "UTF-8";
.heading_03 {
    text-align: center;
    margin: 0 0 82px;
    letter-spacing: 0;
    font-size: 5.2rem;
}
.heading_03__ruby {
    display: block;
    font-family: ryo-text-plusn, serif;
    font-size: 1.6rem;
    margin: 4px 0 26px;
    line-height: 1.6;
    letter-spacing: 2.5px;
}
main .heading_04 {
    font-size: 3.4rem;
    line-height: 1.3;
    letter-spacing: 4px;
    margin: 9px 0 14px;
    position: relative;
    padding-left: 2%;
}
/* sec_01 concept */

.sec_01 {
    margin: 0 auto;
    padding: 172px 0 0;
}
.sec_01 .bg_container {
    background: url("../img/theory/theory_bg.jpg");
    background-size: cover;
    height: auto;
    padding-top: 81px;
    padding-bottom: 168px;
    width: 100%;
    position: relative;
    text-align: center;
}

.sec_01 .heading_bottom_text {
    font-size: 2.2rem;
    font-family: ryo-text-plusn, serif;
    line-height: 1.6;
    letter-spacing: 2px;
}
.sec_01 .border {
    background: #121212;
    height: 50px;
    width: 1px;
    display: block;
    margin: 32px auto 28px;
}
.sec_01 .text_box {
    text-align: left;
    padding-left: 15%;
    letter-spacing: 2px;
}
.sec_01 .text_box .heading_05 {
    font-size: 3rem;
    font-family: ryo-text-plusn, serif;
    margin: 0 0 27px;
    line-height: 1.4;
}
.sec_01 .text_box .text--disp {
    letter-spacing: 1px;
    line-height: 1.8;
    margin: 0;
    margin: 0 0 70px;
    font-size: 1.3rem;
    width: 42%;
}
.sec_01 .text_box .text--disp:nth-of-type(2) {
    margin: 0 0 25px;
}
.sec_01 .img_box {
    text-align: left;
    padding-left: 14%;
    width: 64%;
}

/* ----------------------------------
SP
----------------------------------- */
@media screen and (max-width:767px){
    main {
        overflow: hidden;
    }
    .heading_03 {
        margin: 0 0 40px;
        text-align: center;
        font-size: 3.7rem;
        line-height: 0.9;
    }
    .heading_03__ruby {
        font-size: 1.2rem;
        margin: 0 0 26px;
    }
    .sec_01 .heading_04 {
        font-size: 2.1rem;
        padding: 0 9%;
        letter-spacing: 2px;
    }
    .sec_01 {
        margin: 0 auto;
        padding: 110px 0 0;
    }
    .sec_01 .heading_bottom_text {
        font-size: 1.5rem;
    }
    .sec_01 .text--disp {
        letter-spacing: 2px;
        line-height: 1.8;
    }

    .sec_01 .bg_container {
        background: url("../img/theory/theory_bg_sp.png");
        background-size: cover;
        height: auto;
        padding-top: 38px;
        padding-bottom: 90px;
        width: 100%;
        position: relative;
        text-align: center;
    }
    .sec_01 .text_box {
        padding: 0 9%;
    }
    .sec_01 .text_box .heading_05 {
        font-size: 1.9rem;
        margin: 0 0 15px;
    }
    .sec_01 .text_box .text--disp {
        width: 100%;
        margin: 0 0 43px;
    }
    .sec_01 .img_box {
        padding-left: 0;
        width: 100%;
        padding: 0 5%;
    }

}