.menu-mark,.page-menu{appearance:none;-webkit-appearance:none;background:transparent;color:inherit;font:inherit;cursor:pointer}.site-menu{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 24px;background:radial-gradient(circle at 50% 35%,#172b46 0,#080c14 38%,#020305 75%);opacity:0;visibility:hidden;transform:translateY(-12px) scale(1.015);transition:opacity .46s cubic-bezier(.22,1,.36,1),transform .56s cubic-bezier(.22,1,.36,1),visibility 0s linear .56s}.site-menu.is-open{opacity:1;visibility:visible;transform:none;transition-delay:0s}.site-menu nav{width:min(680px,82vw)}.site-menu nav a{display:grid;grid-template-columns:48px 1fr;align-items:center;padding:17px 6px;border-bottom:1px solid #ffffff18;color:#edf2f8;text-decoration:none;opacity:0;transform:translateY(14px);transition:color .25s,opacity .35s cubic-bezier(.22,1,.36,1),transform .45s cubic-bezier(.22,1,.36,1)}.site-menu.is-open nav a{opacity:1;transform:none}.site-menu.is-open nav a:nth-child(1){transition-delay:.08s}.site-menu.is-open nav a:nth-child(2){transition-delay:.12s}.site-menu.is-open nav a:nth-child(3){transition-delay:.16s}.site-menu.is-open nav a:nth-child(4){transition-delay:.20s}.site-menu.is-open nav a:nth-child(5){transition-delay:.24s}.site-menu.is-open nav a:nth-child(6){transition-delay:.28s}.site-menu nav a:first-child{border-top:1px solid #ffffff18}.site-menu nav a:hover{color:#86c8f0}.site-menu nav small{color:#6185a5;font-size:9px;letter-spacing:.15em}.site-menu nav span{font-size:clamp(20px,3vw,34px);font-weight:300;letter-spacing:.04em}.site-menu>p{width:min(680px,82vw);margin:28px auto 0;color:#69778a;font-size:10px;line-height:1.8;letter-spacing:.08em;opacity:0;transform:translateY(8px);transition:opacity .35s .32s,transform .4s .32s}.site-menu.is-open>p{opacity:1;transform:none}.site-menu-close{position:absolute;top:25px;left:5%;width:44px;height:44px;border:1px solid #ffffff28;border-radius:50%;background:transparent;cursor:pointer;opacity:0;transform:rotate(-45deg);transition:opacity .3s .08s,transform .5s cubic-bezier(.22,1,.36,1)}.site-menu.is-open .site-menu-close{opacity:1;transform:none}.site-menu-close span{position:absolute;left:12px;right:12px;top:21px;height:1px;background:#fff;transform:rotate(45deg)}.site-menu-close span:last-child{transform:rotate(-45deg)}body.menu-open{overflow:hidden}@media(max-width:700px){.site-menu{justify-content:center;padding:72px 22px 46px}.site-menu nav{width:min(88vw,520px)}.site-menu nav a{grid-template-columns:42px 1fr;padding:14px 4px}.site-menu nav span{font-size:20px}.site-menu>p{width:min(88vw,520px);margin-top:20px;font-size:9px}.site-menu-close{top:14px;left:18px}}
.site-menu nav a{grid-template-columns:38px 34px 1fr}.site-menu nav a>i{color:#78a9cf;font-size:18px}.site-menu-close{top:18px;left:5%;display:grid;place-items:center;width:40px;height:40px;padding:0;color:#fff}.site-menu-close>i{display:block;font-size:21px;line-height:1;transform:translateY(0)}.menu-mark>i,.page-menu>i{font-size:20px;line-height:1}.site-menu-close span{display:none}@media(max-width:700px){.site-menu nav a{grid-template-columns:36px 30px 1fr}.site-menu nav a>i{font-size:17px}.site-menu-close{top:15px;left:18px;width:36px;height:36px}.site-menu-close>i{font-size:20px}}
/* 2026-10-03 いまぽん。：ヘッダーは「宇宙データ研究所」を上、「LUMINE LABO」を下に（ヒーローと同じ順） */
.page-brand,.hero-header .brand{display:flex;flex-direction:column-reverse;align-items:center}
.page-brand span,.hero-header .brand span{margin-top:0!important;margin-bottom:5px}