@charset "UTF-8";
#wrap{
    overflow: hidden;
}
img{
    width: 100%;
    height: auto;
}
/* subhead */
.subhead{
    height: 100vw;
    max-height:400px;
    background: url(../img/strength/subhead.jpg);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
.subhead_ttl {
    display: flex;
    /* margin: 90px 0 0; */
    width: 100%;
    justify-content: center;
    align-items: center;
    height: 110px;
    text-align: center;
}
.subhead_ttl_ja {
    font-size: 36px;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: #fff;
}

@media screen and (max-width: 650px) {
    .subhead_ttl_ja {
    font-size: 30px;
    }
}


/* main */
section.str_sec{
    margin: 120px 0 0;
    padding-bottom: 140px;
}

.sec_heading{
    max-width: 1240px;
    padding: 0 20px;
    margin: 0 auto 160px;
    text-align: center;
}
.sec_ttl{
    font-size: 30px;
    font-weight: bold;
    margin-bottom: 50px;
    letter-spacing: 0.1em;
}
.sec_text{
    font-size: 16px;
    line-height: 1.8;
}

.str_flex{
    display: flex;
    margin-bottom: 200px;
    max-width: 1920px;
    margin: 0 auto 140px;
}
.str_flex:last-of-type {
    margin-bottom: 0;
}
.str_flex > div{
    width: 50%;
}
.img_area{
    display: flex;
    justify-content: space-between;
}
.img_up{
    width: 47%;
    max-width: 450px;
    margin-top: 0px;
}
.img_down{
    width: 50%;
    max-width: 480px;
    /* margin-top: 120px; */
    padding-top: 80px;
}

.text_area{
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0 20px;
    margin: auto;
}
.text_area_box{
    display: inline-block;
}
.str_ttl{
    font-size: 30px;
    font-weight: bold;
}
.str_text{
    margin: 30px auto;
    line-height: 1.8;
}
.str_btn{
    background: #238fcd;
    display: inline-block;
    color: #fff;
    font-size: 18px;
    font-weight: 500;
    line-height: 1;
    padding: 10px 20px;
    border-radius: 100px;
    transition: 0.3s;
}
.str_btn:hover {
    opacity: 0.7;
    transform: scale(1.02);
}
.str_btn.fee{
    background: #238fcd;
}
.str_btn.biz{
    background: #23afcd;
}
.str_btn.biz:not(:last-of-type) {
    margin-right: 12px;
}
.br450{
    display: none;
}
@media screen and (max-width: 1150px) {
    .str_btn {
        font-size: 16px;
    }
    .str_btn.biz {
        margin-bottom: 10px;
    }

}
@media screen and (max-width: 1000px) {
    .str_ttl {
        font-size: 24px;
    }
    .str_text {
        margin: 20px auto;
        line-height: 1.8;
        font-size: 14px;
    }
    .str_btn {
        font-size: 16px;
    }
    .sec_ttl {
        font-size: 28px;
        margin-bottom: 30px;
    }
    .sec_heading {
        margin: 0 auto 140px;
    }
    .str_flex {
        margin-bottom: 180px;
    }
    .str_btn {
        font-size: 14px;
        padding: 10px 20px;
    }
}

@media screen and (max-width: 900px){
    .over900{
        display: none;
    }
}

@media screen and (max-width: 768px){
    .img_down {
        padding-top: 20px;
    }
}

@media screen and (max-width: 750px){
    .str_ttl {
        font-size: 20px;
    }
}

@media screen and (max-width: 650px){
    .str_flex {
        flex-wrap: wrap;
    }
    .img_area {
        order: 1;
        /* max-width: 500px; */
        margin: 0 auto 40px;
        padding: 0 10px;
    }
    .text_area{
        order: 2;
    }
    text_area_box {
        display: block;
    }
    .str_flex > div{
        width: 100%;
        max-width: 500px;
        /* margin: auto; */
    }
    .str_flex {
        margin-bottom: 100px;
    }
    .over900{
        display: block;
    }
    .sec_ttl {
        font-size: 24px;
    }
    .str_ttl {
        font-size: 18px;
    }
    section.str_sec {
        margin: 80px 0 0;
        padding-bottom: 80px;
    }
    .text_area {
        text-align: center;
    }
    .img_down {
        padding-top: 20px;
    }
    .str_btn {
        font-size: 14px;
        width: 140px;
        padding: 10px 20px;
    }
    .str_btn.biz {
        margin-bottom: 10px;
        white-space: nowrap;
        width: auto;
    }
}

@media screen and (max-width: 450px){
    .br450{
        display: block;
    }
}