/* base */

html{
    font-size: 62.5%;
}      

body {
    color: #171717;
    font-size: 1.6em;
    line-height: 1.8;
    letter-spacing: 0.05em;
    font-family: 'Noto Serif', 'Noto Serif JP';
}

body.noscroll {
    overflow: hidden;
}

img {
    width: 100%;
    vertical-align: bottom;
}

a {
    text-decoration: none;
    color: #fff;
}

li {
    list-style: none;
}

.section_wrapper {
    padding: 100px 0 70px;
}

.section_ttl {
    max-width: 1000px;
    color: #282F35;
    font-style: italic;
    font-size: 6rem;
    margin: 0 auto 80px;
    padding: 0 20px;
}

.section_ttl::after {
    content: "";
    display: inline-block;
    background-color: #282F35;
    width: 200px;
    height: 5px;
    margin-left: 33px;
    vertical-align: middle;
}

.section_inner {
    max-width: 1000px;
    margin: 0 auto;
}

.section_bottom {
    max-width: 1200px;
    margin: 0 auto;
    font-size: 9rem;
    opacity: 0.05;
}

.txt_white {
    color: #fff;
}

.section_bottom.txt_white {
    opacity: 0.1;
}

.section_ttl.txt_white::after {
    background-color: #fff;
}

.txt_right {
    text-align: right;
}

.link_btn {
    display: block;
    width: 235px;
    line-height: 60px;
    margin: 0 auto 70px;
    background-color: #F7D43F;
    box-shadow: 0 0 6px #1b1310;;
    border-radius: 30px;
    text-align: center;
    color: #171717;
    font-weight: bold;
    text-decoration: none;
    /* transition: .3s; */
}

.link_btn:hover {
    opacity: .7;
    /* transition: .3s; */
}

.sp_br {
    display: none;
}

/* header */

.header {
    padding: 19px 30px;
    position: absolute;
    top: 0;
    left: 50%;
    z-index: 1;
    transform: translateX(-50%);
    box-sizing: border-box;
    width: 100%;
    transition: .3s;
}

.header_wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    font-style: italic;
}

.header.fixed {
    position: fixed;
    background-color: #282F35;
    padding: 30px;
    width: 100%;
    transition: .3s;
}

header a {
    transition: .3s;
    /* font-weight: bold;  イタリックはboldしか入れていない*/
}

header a:hover {
    opacity: .7;
    transition: .3s;
}

.site_ttl {
    font-size: 2.6rem;
}

.nav_list {
    display: flex;
}

.nav_item {
    margin-right: 30px;
}

.nav_item:last-of-type {
    margin-right: 0;
}

.burger_btn {
    display: none;
}

/* fv */

.fv_wrapper {
    height: 100vh;
    min-height: 550px;
    position: relative;
}

.fv_wrapper img {
    object-fit: cover;
    background-size: cover;
    height: 100vh;
    min-height: 100%;
}

.fv_copy {
    position: absolute;
    left: 120px;
    bottom: 177px;
    color: #fff;
}

.fv_copy_en {
    font-size: 7rem;
    margin-bottom: 31px;
    font-weight: bold;
}

.fv_copy_jp {
    font-size: 4rem;
    text-align: center;
    font-weight: bold;
}

.slick-arrow {
    display: none !important;
}

/* concept */

.concept_lead {
    margin-bottom: 60px;
    text-align: center;
    font-size: 3rem;
    font-weight: bold;
    line-height: 1.67;
}

.concept_content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 70px;
}

.concept_item {
    width: 44%;
}

.concept_txt {
    line-height: 1.87;
    font-weight: bold;
}

.concept-img {
    margin-left: 20px;
}

/* works */

#works  {
    background-image: url(../img/works-bgi@2x.jpg);
    background-size: cover;
    background-position: center;
}

.works_list {
    display: flex;
    justify-content: space-between;
    margin-bottom: 80px;
}

.works_item {
    width: 32%;
    background-color: #fff;
}

.works_item_img {
    width: 100%;
    height: 200px;
}

.works_item_txt {
    color: #141414;
    padding: 25px 20px;
}

/* service */

.service_list {
    display: flex;
    margin: 0 auto 70px;
    max-width: 1440px;
}

.service_list li {
    width: 33%;
    background-position: center;
    background-size: cover;
}

.service_item1 {
    background-image: url(../img/service-img01@2x.jpg);
}

.service_item2 {
    background-image: url(../img/service-img02@2x.jpg);
}

.service_item3 {
    background-image: url(../img/service-img03@2x.jpg);
}

.service_list a {
    display: block;
    text-align: center;
    line-height: 320px;
    font-size: 4rem;
    font-style: italic;
}

.service_list a:hover {
    background-color: rgba(40, 47, 53, .7);
    transition: .3s;
}

/* contact */

#contact {
    background-image: url(../img/contact-bgi@2x.jpg);
    background-size: cover;
    background-position: center;
}

.contact_txt {
    color: #fff;
    text-align: center;
    font-size: 2rem;
    margin: 60px 0 40px;
}

/* footer */

footer {
    padding: 30px 0;
    text-align: center;
    font-size: 1.4rem;
    font-weight: bold;
    color: #282F35;
}

/* responsive */

@media screen and (max-width: 768px) {
    
    /* base sp */
    
    .section_wrapper {
        padding: 100px 0 40px;
    }

    .section_ttl {
        font-size: 3rem;
        margin-bottom: 50px;
        padding: 0 4vw;
    }

    .section_ttl::after {
        width: 90px;   
    }

    .section_inner {
        padding: 0 4vw;
    }

    .section_bottom {
        font-size: 4rem;
        padding: 0 4vw;
    }

    .link_btn {
        margin-bottom: 40px;
    }

    .sp_br {
        display: block;
    }
    
    .pc_br {
        display: none;
    }

    /* header sp */

    .header {
        padding: 30px 4vw 0;
    }

    .header_nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background-color: #282F35;
    }

    .nav_list {
        height: 100%;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .nav_item {
        margin: 0 0 30px;
    }

    .nav-item:last-of-type {
        margin-bottom: 0;
    }

    .burger_btn {
        display: block;
        position: absolute;
        top: 30px;
        right: 4vw;
        border: none;
        background-color: transparent;
        cursor: pointer;
        padding: 0;
        /* outline: none; */
        /* appearance: none; */
    }
      
    .burger_btn .bar {
        display: block;
        width: 30px;
        height: 3px;
        background-color: #fff;
    }
      
    .bar_top {
        margin-bottom: 8px;
    }
      
    .bar_middle {
        margin-bottom: 8px;
    }

     /* ハンバーガーメニューが開いたとき */            
    .burger_btn.cross .bar_top {
        transform: rotate(45deg) translate(8px, 8px);
        transition: .3s;
    }
      
    .burger_btn.cross .bar_middle {
        opacity: 0;
        transition: .3s;
    }
      
    .burger_btn.cross .bar_bottom {
        transform: rotate(-45deg) translate(8px,-8px);
        transition: .3s;
    }
      
    body.noscroll {
        overflow: hidden;
    }

    /* fv sp */

    .fv_copy {
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        white-space: nowrap;
    }

    .fv_copy_en {
        font-size: 9.8vw;
    }

    .fv_copy_jp {
        font-size: 8vw;
    }

    /* concept sp */

    .concept_lead {
        margin-bottom: 32px;
        font-size: 2rem;
    }
    
    .concept_content {
        display: block;
        margin-bottom: 40px;
    }
    
    .concept_txt {
        margin-bottom: 30px;
    }

    .concept_item {
        width: 100%;
    }
    
    /* works sp */

    .works_list {
        display: block;
        padding: 0 4vw;
        margin-bottom: 80px;
    }
    
    .works_item {
        width: 320px;
        max-width: 100%;
        margin: 0 auto 30px;
    }

    /* service sp */

    .service_list {
        display: block;
        margin-bottom: 40px;
    }

    .service_list li {
        width: 100%;
        margin-bottom: 30px;
    }

}