/* ///////////////////// */
/* header */
/* ///////////////////// */
header {
    width: 100%;
    height: 70px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99;
    background: #1a1a1a;
    color: #fff;
}
.header_flex {
    display: flex;
    justify-content: space-between;
    /*align-items: center;*/
    /*width: 100%;*/
    width: 1000px;
    height: 70px;
    padding: 15px 0;
}

/* メニュー左側 */
.header_flex_left {
    display: flex;
    justify-content: flex-start;
}
.header_logo {
    /*border: solid 1px #fff;
    width: 100px;*/
    width: 200px;
    height: 40px;
    text-align: center;
    font-size: 24px;
    margin: 0;
}
.header_language {

}
.header_language summary {
    padding-top: 9px;
    padding-left: 30px;
    padding-right: 36px;
    font-size: 14px;

    display: block; /* デフォルトの三角アイコンを消す */
    cursor: pointer;
    position: relative;
}
/* WebKitブラウザのデフォルトの三角形アイコンを消す */
summary::-webkit-details-marker {
    display: none;
}

.header_language ul {
    list-style-type: none;
    padding-top: 5px;
}
.header_language ul li {
    font-size: 12px;
    color: #b3b3b3;
    background: rgba(0,0,0,0.7);
    padding: 5px 0;
}

/* アコーディオンオープン時アニメーション */
details[open] .header_language ul {
    animation: fadeIn 0.85s ease;
  }
  @keyframes fadeIn {
    0% {
      opacity: 0;
      transform: translateY(-12px);
    }
    100% {
      opacity: 1;
      transform: none;
    }
}
/* カスタムアイコン */
summary::before {
    content: "";
    position: absolute;
    top: calc(50% + +1px);
    right: 15px;
    width: 10px;
    height: 10px;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: translateY(-50%) rotate(45deg);
    transition: transform 0.75s;
}
  
/* アイコン切り替え */
  details[open] summary::before {
    transform: translateY(-50%) rotate(225deg);
    top: calc(50% + 7px);
}

/* メニュー右側 */
.header_flex_right {
    display: flex;
    justify-content: flex-end;
    width: 1100px;
}
.header_link {
    display: flex;
    justify-content: flex-end;
}
.header_link_menu {
    font-size: 14px;
    padding-top: 10px;
    padding-right: 20px;
}
.header_link_menu_detail {
    padding-right: 50px;
}
.header_link_menu summary {
    display: block; /* デフォルトの三角アイコンを消す */
    cursor: pointer;
    position: relative;
}
/* カスタムアイコン */
.header_link_menu summary::before {
    content: "";
    position: absolute;
    top: calc(50% - 5px);
    right: -23px;
    width: 10px;
    height: 10px;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: translateY(-50%) rotate(45deg);
    transition: transform 0.75s;
}
/* アイコン切り替え */
.header_link details[open] summary::before {
    top: calc(50% + 1px);
}
.header_link_menu ul {
    list-style-type: none;
    padding-top: 5px;
}
.header_link_menu li {
    font-size: 12px;
    color: #b3b3b3;
    background: rgba(0,0,0,0.7);
    padding: 5px 15px;
}
.header_icon_i {
    margin: 0 6px;
}
.header_flex_right i {
    font-size: 24px;
    margin-top: 5px;
}
.header_signbtn {
    display: flex;
    width: 130px;
    background: #e3c058;
    color: #1a1a1a;
    justify-content: center;
    align-items: center;
    margin-left: 25px;
    font-weight: bold;
}


/* ///////////////////// */
/* footer */
/* ///////////////////// */
footer {
    display: block;
    width: 100%;
    padding: 36px 0 36px;
    background: #1a1a1a;
}
.footer_flex {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}
.footer_block {
    display: block;
    text-align: left;
}
.footer_block p {
    font-size: 14px;
    color: #fff;
    padding-bottom: 7px;
}
.footer_block a {
    font-size: 12px;
    color: #b3b3b3;
    display: block;
    margin-top: 10px;
}
.sns_flex {
    display: flex;
    width: 120px;
    justify-content: center;
    align-items: center;
    margin: 3rem auto 5rem;
}
.sns_flex a {
    display: flex;
    align-items: center;
    /*
    width: 20px;
    height: 20px;
    margin: 3rem auto 5rem;
    */
}
.sns_flex a img {
    margin: 1rem;
    width: 18px;
}
.copyright {
    text-align: center;
    font-size: 10px;
    color: #b3b3b3;
}


/* /////////// */
/*  小さいPC  */
/* /////////// */
@media screen and (max-width:1250px){
    .header_language summary {
        font-size: 12px;
    }
    .header_language ul li {
        font-size: 10px;
    }
    .header_flex_right {
        width: 1000px;
    }
    .header_link_menu {
        font-size: 12px;
    }
    .header_link_menu li {
        font-size: 10px;
    }
    .header_flex_right i {
        font-size: 24px;
        margin-top: 7px;
    }
    .header_signbtn {
        width: 115px;
        font-size: 14px;
    }
    
    .footer_flex {
        max-width: 1000px;
    }
    .footer_block a {
        font-size: 11px;
    }
}

@media screen and (max-width:1050px){
    .header_language summary {
        padding-left: 15px;
    }
    .header_link_menu {
        font-size: 11px;
        padding-right: 10px;
    }
    .header_flex_right {
        width: auto;
    }
    .header_link {
        width: 360px;
    }
    .header_link_menu summary::before {
        content: "";
        position: absolute;
        top: calc(50% - 3px);
        right: -10px;
        width: 6px;
        height: 6px;
        border-right: 2px solid #fff;
        border-bottom: 2px solid #fff;
        transform: translateY(-50%) rotate(45deg);
        transition: transform 0.75s;
    }
    
    .footer_flex {
        max-width: 750px;
    }
}

/* /////////// */
/* モバイル */
/* /////////// */
@media screen and (max-width:767px){
    .header_flex_right {
        width: 100px;
    }
    .header_link {
        display: none;
    }
    .header_flex_right i {
        font-size: 20px;
        margin-top: 10px;
    }
    .header_signbtn {
        width: 85px;
        font-size: 12px;
        margin-left: 10px;
    }

    footer {
        padding: 50px 0 15px;
    }
    .footer_flex {
        max-width: calc(100% - 20px);
        flex-wrap: wrap;
    }
    .footer_block {
        width: 50%;
        margin-bottom: 20px;
    }
}

@media screen and (max-width:480px){
}