body{
    /*上下方向にはみ出した要素ををスクロールさせる*/
    overflow-y: scroll;
    /*スクロールバー非表示（IE・Edge）*/
    -ms-overflow-style: none;
    /*スクロールバー非表示（Firefox）*/
    scrollbar-width: none;
    background: #fff;
}
/*スクロールバー非表示（Chrome・Safari）*/
body::-webkit-scrollbar{
    display:none;
}

.pc_content{
    display: none;
}

.sp_content{
    display: block;
}

#base{
    max-width: 640px;
    margin: auto;
    overflow: hidden;
    background: #000;
    padding-bottom: 20vw;
}

#base .header{
    padding: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #fff;
    z-index: 10;
    max-width: 640px;
}

.nav_toggle {
    display: block;
    position: relative;
    width: 1.75rem;
    height: 1.5rem;
    cursor: pointer;
}
.nav_toggle i {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #333;
    position: absolute;
    transition: transform .5s, opacity .5s;
}
.nav_toggle i:nth-child(1) {
    top: 0;
}
.nav_toggle i:nth-child(2) {
    top: 0;
    bottom: 0;
    margin: auto;
}
.nav_toggle i:nth-child(3) {
    bottom: 0;
}

.nav_toggle.show i:nth-child(1) {
    transform: translateY(10px) rotate(-45deg);
}
.nav_toggle.show i:nth-child(2) {
    opacity: 0;
}
.nav_toggle.show i:nth-child(3) {
    transform: translateY(-12px) rotate(45deg);
}

.nav {
    position: fixed;
    top: 62px;
    right: -100vw;
    bottom: 0;
    padding: 0 1rem;
    opacity: 1;
    background: #fff;
    height: fit-content;
    border-top: 1px solid #A7A7A7;
    transition: all 0.5s 0s ease;
    width: 100%;
    max-width: 640px;
    z-index: 20;
}

.nav ul{
    padding: 0 20px;
}

.nav ul li a{
    text-align: center;
    font-weight: 500;
    font-size: 16px;
    width: 100%;
    padding: 25px;
    border-bottom: 2px solid #D3D3D3;
    display: inline-block;
    color: #000;
    letter-spacing: 1px;
}

.nav ul li:last-child a{
    border-bottom: none;
}

.nav.show {
    right: 0;
    transition: all 0.5s 0s ease;
}

.menu_back{
    background: rgba(0,0,0,0.5);
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    opacity: 0;
    z-index: -1;
    transition: all 0.5s 0s ease;
}

.menu_back.show{
    opacity: 1;
    z-index: 1;
    transition: all 0.5s 0s ease;
}

#base .header .logo_wrap{
    width: 90px;
}

#base .header .logo_wrap img{
    width: 100%;
}

#base .lp li{
    font-size: 0;
}

#base .lp li img{
    font-size: 0;
    width: 100%;
}

#base .lp li.youtube iframe{
    height: 75vw;
}


.footer_btn{
    width: 100%;
    max-width: 640px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 5px;
    position: fixed;
    left: 0;
    bottom: 0;
    z-index: 1;
}

.footer_btn li{
    width: 50%;
}

.footer_btn li a{
    display: inline-block;
}

.footer_btn li a img{
    width: 100%;
}

@media screen and (min-width:640px) {
    #base .header{
        padding: 20px 40px;
        left: 0;
        max-width: initial;
    }

    #base .header .left_wrap{
        display: flex;
    }

    #base .header .logo_wrap{
        width: 103px;
    }

    #base .pc_content .header .left_wrap .nav_menu_ul{
        display: flex;
        margin-left: 30px;
        align-items: center;
    }

    #base .pc_content .header .left_wrap .nav_menu_ul .nav_menu_li{
        font-size: 18px;
        margin-right: 20px;
        padding-right: 20px;
        border-right: 1px solid #000;
    }

    #base .pc_content .header .left_wrap .nav_menu_ul .nav_menu_li a{
        color: #000;
    }

    #base .lp li.youtube iframe{
        padding: 0 10vw;
        height: 40vw;
    }

    .nav{
        right: calc(50vw - 640px);
        opacity: 0;
    }

    .nav.show{
        right: calc(50vw - 320px);
        opacity: 1;
    }

    #base{
        padding-bottom: 0;
        width: auto;
        max-width: initial;
    }

    .footer_btn{
        left: auto;
        position: relative;
        bottom: 0;
        max-width: initial;
        width: 400px;
        padding: 0;
    }

    .pc_content{
        display: block;
    }

    .sp_content{
        display: none;
    }

}