*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#fff; --ink:#0F7D93; --accent:#0C99B8; --vivid:#17C2E4; --pale:#ABE4EF;
  --sub:#4A6B73; --line:#E4EFF2;
  --gut:20px; --sec:72px;
  --ease:cubic-bezier(.25,.1,.25,1);
}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--ink);
  font-family:"Zen Maru Gothic","Hiragino Maru Gothic ProN",sans-serif;
  font-size:16px; line-height:1.9; letter-spacing:.05em;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
img,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:opacity .5s var(--ease)}
a:active{opacity:.55}
.en{font-family:"Outfit",sans-serif;letter-spacing:.05em}
.wrap{width:100%;padding-inline:var(--gut)}

/* header */
.hd{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.hd-in{height:56px;display:flex;align-items:center;justify-content:space-between;padding-inline:var(--gut)}
.hd-logo{display:flex;flex-direction:column;justify-content:center;min-height:44px;font-size:15px;font-weight:600;color:var(--ink);line-height:1.2}
.hd-logo small{display:block;font-size:11px;letter-spacing:.12em;color:var(--sub);margin-top:3px;font-weight:400;line-height:1}
.burger{width:44px;height:44px;display:flex;flex-direction:column;justify-content:center;
  align-items:flex-end;gap:5px;background:none;border:0;cursor:pointer;margin-right:-10px}
.burger span{display:block;width:22px;height:1.5px;background:var(--ink);transition:.5s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(20deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-20deg)}
.nav{position:fixed;inset:56px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);
  z-index:49;transform:translateY(-12px);opacity:0;pointer-events:none;transition:.5s var(--ease)}
.nav.open{transform:none;opacity:1;pointer-events:auto}
.nav ul{list-style:none;padding:8px var(--gut) 24px}
.nav li{border-bottom:1px solid var(--line)}
.nav li:last-child{border-bottom:0}
.nav a{display:block;padding:15px 2px;font-size:15px;font-weight:600;color:var(--ink);min-height:48px}
.nav a i{font-style:normal;font-size:11px;color:var(--sub);margin-left:10px;letter-spacing:.02em}

/* FV */
.fv{position:relative;margin-top:56px;height:calc(100svh - 56px);min-height:520px;overflow:hidden;background:#e8eff0}
.fv-media{position:absolute;inset:0}
.fv video,.fv img.pos{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.fv::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(0,0,0,.32) 0%,rgba(0,0,0,.06) 34%,rgba(0,0,0,.62) 100%)}
.fv-cap{position:absolute;left:var(--gut);right:var(--gut);bottom:38px;z-index:2;color:#fff}
.fv-cap .t1{font-size:12px;letter-spacing:.2em;opacity:1;text-shadow:0 1px 10px rgba(0,0,0,.5)}
.fv-cap .t2{font-size:27px;font-weight:700;line-height:1.5;margin-top:12px;text-shadow:0 1px 14px rgba(0,0,0,.35)}
.fv-cap .t3{font-size:13px;line-height:1.9;margin-top:12px;text-shadow:0 1px 10px rgba(0,0,0,.5)}

/* section */
section{padding-block:var(--sec)}
.st{margin-bottom:26px}
.st b{display:block;font-size:24px;line-height:1;font-weight:600;color:var(--accent);letter-spacing:.05em;
  font-family:"Outfit",sans-serif}
.st i{display:block;font-style:normal;font-size:13px;color:var(--sub);margin-top:9px;letter-spacing:.08em}
p{font-size:15px;line-height:2}
p+p{margin-top:1.1em}
.lead{font-size:16px;line-height:2.1}

/* steps */
.steps{list-style:none;margin-top:30px;border-top:1px solid var(--line)}
.steps li{border-bottom:1px solid var(--line);padding:18px 2px;display:flex;gap:14px;align-items:flex-start}
.steps .n{flex:0 0 26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;
  font-size:11px;display:flex;align-items:center;justify-content:center;font-family:"Outfit",sans-serif;margin-top:3px}
.steps .b{font-size:14px;line-height:1.85}
.steps .b em{display:block;font-style:normal;font-weight:700;font-size:15px;margin-bottom:3px}

/* video block */
.vblock{margin-top:34px;position:relative;aspect-ratio:9/16;overflow:hidden;background:#e8eff0}
.vblock video,.vblock img.pos{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.vcap{font-size:11px;color:var(--sub);margin-top:10px;letter-spacing:.06em}

/* numbers */
.nums{list-style:none;display:flex;flex-wrap:wrap;margin-top:6px;border-top:1px solid var(--line)}
.nums li{width:50%;padding:20px 0;border-bottom:1px solid var(--line)}
.nums li:nth-child(odd){padding-right:12px}
.nums li:nth-child(even){padding-left:16px;border-left:1px solid var(--line)}
.nums b{display:block;font-family:"Outfit",sans-serif;font-size:38px;line-height:1;color:var(--accent);font-weight:600}
.nums b span{font-size:14px;margin-left:3px;font-family:"Zen Maru Gothic",sans-serif}
.nums i{display:block;font-style:normal;font-size:12px;color:var(--sub);margin-top:8px}

/* schedule */
.sch{list-style:none;border-top:1px solid var(--line)}
.sch li{border-bottom:1px solid var(--line);padding:18px 2px}
.sch .d{font-family:"Outfit",sans-serif;font-size:12px;color:var(--sub);letter-spacing:.06em}
.sch .n{font-size:17px;font-weight:700;margin-top:5px;line-height:1.6}
.sch .p{font-size:12px;color:var(--sub);margin-top:5px}
.note{font-size:12px;color:var(--sub);margin-top:16px;line-height:1.9}

/* nui grid */
.ngrid{list-style:none;display:flex;flex-wrap:wrap;gap:14px;margin-top:4px}
.ngrid li{width:calc((100% - 14px)/2)}
.ngrid.g3{gap:12px}
.ngrid.g3 li{width:calc((100% - 24px)/3)}
.ngrid figure{margin:0}
.ngrid .im{aspect-ratio:1/1;background:#F3FAFB;display:flex;align-items:center;justify-content:center;padding:8px}
.ngrid .im img{width:100%;height:100%;object-fit:contain}
.ngrid figcaption{margin-top:7px;font-size:11px;color:var(--sub);line-height:1.65;letter-spacing:0}
.ngrid figcaption b{display:block;font-family:"Outfit",sans-serif;font-weight:400;color:var(--sub);font-size:11px;opacity:.8}

/* members */
.mem{list-style:none;border-top:1px solid var(--line)}
.mem li{border-bottom:1px solid var(--line);padding:16px 2px;display:flex;align-items:center;gap:14px}
.mem .av{flex:0 0 46px;height:46px;border-radius:50%;background:#F0FAFC;border:1px solid var(--pale);
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;color:var(--ink)}
.mem .tx b{display:block;font-size:15px;font-weight:700;line-height:1.5}
.mem .tx i{display:block;font-style:normal;font-size:11px;color:var(--sub);margin-top:3px;line-height:1.6}

/* soon */
.soon{margin-top:22px;border:1px solid var(--pale);padding:26px 20px;text-align:center}
.soon b{display:block;font-family:"Outfit",sans-serif;font-size:15px;color:var(--ink);letter-spacing:.14em}
.soon i{display:block;font-style:normal;font-size:12px;color:var(--sub);margin-top:9px;line-height:1.9}

/* archive list */
.arc{list-style:none;border-top:1px solid var(--line)}
.arc li{border-bottom:1px solid var(--line)}
.arc a,.arc .row{display:block;padding:18px 2px}
.arc .d{font-family:"Outfit",sans-serif;font-size:12px;color:var(--sub);letter-spacing:.06em}
.arc .n{font-size:17px;font-weight:700;margin-top:5px;line-height:1.6}
.arc .p{font-size:12px;color:var(--sub);margin-top:5px}
.arc .c{font-size:12px;color:var(--ink);margin-top:8px;font-weight:700}
.arc .x{font-size:13px;line-height:1.95;margin-top:10px;color:var(--ink)}

/* more */
.more{display:flex;align-items:center;justify-content:center;gap:9px;margin-top:28px;
  min-height:50px;border:1px solid var(--accent);border-radius:99px;
  font-family:"Outfit",sans-serif;font-size:13px;color:var(--ink);letter-spacing:.1em}
.more::after{content:"→"}

/* footer */
.ft{border-top:1px solid var(--line);padding:44px var(--gut) 54px;text-align:center}
.ft .lg{font-size:16px;font-weight:700;color:var(--ink)}
.ft .lg small{display:block;font-family:"Outfit",sans-serif;font-size:11px;letter-spacing:.18em;color:var(--sub);margin-top:7px;font-weight:400}
.ft .ig{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;margin-top:22px;
  border:1px solid var(--accent);border-radius:99px;font-family:"Outfit",sans-serif;font-size:13px;
  color:var(--ink);letter-spacing:.08em}
.ft .cp{font-size:11px;color:var(--sub);margin-top:26px;font-family:"Outfit",sans-serif;letter-spacing:.06em}
.ft nav{margin-top:26px;display:flex;flex-wrap:wrap;justify-content:center;gap:0 18px}
.ft nav a{font-family:"Outfit",sans-serif;font-size:12px;color:var(--sub);min-height:44px;display:flex;align-items:center}

/* page head */
.ph{margin-top:56px;padding:44px var(--gut) 0}
.ph b{display:block;font-family:"Outfit",sans-serif;font-size:24px;line-height:1;color:var(--accent);font-weight:600;letter-spacing:.05em}
.ph i{display:block;font-style:normal;font-size:13px;color:var(--sub);margin-top:9px;letter-spacing:.08em}
.ph p{font-size:14px;margin-top:18px}
.phv{margin-top:30px;position:relative;aspect-ratio:16/10;overflow:hidden;background:#e8eff0}
.phv video,.phv img.pos{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}




/* research */
.rs-intro{max-width:34em}
.deep{margin-top:30px}
.deep summary{display:flex;align-items:center;justify-content:center;gap:10px;
  min-height:50px;border:1px solid var(--accent);border-radius:99px;cursor:pointer;
  font-family:"Outfit",sans-serif;font-size:13px;color:var(--ink);letter-spacing:.1em;
  list-style:none;transition:.5s var(--ease);max-width:340px;margin-inline:auto}
.deep summary::-webkit-details-marker{display:none}
.deep summary::after{content:"↓";font-size:12px}
.deep[open] summary::after{content:"↑"}
.deep summary .l2{display:none}
.deep[open] summary .l1{display:none}
.deep[open] summary .l2{display:inline}
.deep summary:active{opacity:.6}
.deep-body{padding-top:44px}
.paper{border-top:1px solid var(--line)}
.paper section{padding:34px 0 6px;border:0}
.ch{display:flex;align-items:baseline;gap:11px}
.ch .no{font-family:"Outfit",sans-serif;font-size:12px;color:var(--vivid);letter-spacing:.1em;flex:0 0 auto}
.ch h3{font-size:19px;font-weight:700;line-height:1.6;color:var(--accent)}
.paper p{font-size:14px;line-height:2;margin-top:14px;max-width:34em}
.paper p.q{border-left:2px solid var(--pale);padding-left:16px;color:var(--sub);font-size:13px}
.dl{margin-top:20px;border-top:1px solid var(--line)}
.dl div{padding:14px 0;border-bottom:1px solid var(--line);font-size:13px;line-height:1.85}
.dl dt{color:var(--sub);font-weight:400;font-size:11px;letter-spacing:.04em;margin-bottom:5px}
.dl dd{flex:1}
.dl dd b{color:var(--accent)}
.fig{margin:26px 0 0}
.fig figcaption{font-size:11px;color:var(--sub);line-height:1.8;margin-top:11px;letter-spacing:0}
.fig figcaption b{display:block;font-family:"Outfit",sans-serif;font-size:11px;color:var(--vivid);letter-spacing:.08em;margin-bottom:3px}
.faces{display:flex;gap:14px}
.faces li{list-style:none;width:calc((100% - 28px)/3)}
.faces .im{aspect-ratio:1/1;background:#F3FAFB;display:flex;align-items:center;justify-content:center;padding:8px}
.faces .im img{width:100%;height:100%;object-fit:contain}
.svgfig{border:1px solid var(--line);padding:26px 0;display:flex;justify-content:center;background:#fff}
.stat{display:flex;flex-wrap:wrap;margin-top:22px;border-top:1px solid var(--line)}
.stat li{list-style:none;width:50%;padding:16px 0;border-bottom:1px solid var(--line)}
.stat li:nth-child(even){padding-left:16px;border-left:1px solid var(--line)}
.stat li:nth-child(odd){padding-right:12px}
.stat b{display:block;font-family:"Outfit",sans-serif;font-size:30px;line-height:1;color:var(--accent);font-weight:600}
.stat b span{font-size:13px;margin-left:2px;font-family:"Zen Maru Gothic",sans-serif}
.stat i{display:block;font-style:normal;font-size:11px;color:var(--sub);margin-top:7px;line-height:1.7}
.refs{margin-top:40px;padding-top:26px;border-top:1px solid var(--line)}
.refs h4{font-family:"Outfit",sans-serif;font-size:12px;color:var(--sub);letter-spacing:.14em}
.refs ol{margin-top:14px;padding-left:1.3em}
.refs li{font-size:12px;line-height:1.95;color:var(--sub);margin-bottom:9px}
.refs li a{text-decoration:underline;text-underline-offset:3px}
.colophon{margin-top:26px;font-size:11px;line-height:2;color:var(--sub)}
.rs-hero{margin-top:26px;background:#F3FAFB;aspect-ratio:16/9;overflow:hidden}
.rs-hero img{width:100%;height:100%;object-fit:cover}
@media (min-width:768px){
  .dl dd{max-width:34em}
  .fig figcaption{max-width:34em}
  .refs li{max-width:44em}
  .colophon{max-width:38em}
  .ch h3{font-size:23px}
  .ch .no{font-size:13px}
  .paper p{font-size:15px}
  .paper section{padding:44px 0 10px}
  .dl div{font-size:14px;display:flex;gap:20px;padding:16px 0}
  .dl dt{flex:0 0 130px;font-size:13px;margin-bottom:0}
  .stat li{width:25%;border-left:1px solid var(--line);padding:20px 18px!important}
  .stat li:first-child{border-left:0}
  .stat b{font-size:36px}
  .stat i{font-size:12px}
  .refs li{font-size:13px}
  .faces{gap:20px}
  .faces li{width:calc((100% - 40px)/3);max-width:220px}
  .deep-body{padding-top:56px}
  .fig figcaption{font-size:12px}
}
@media (min-width:1024px){
  .dl dd{max-width:33em}
  .fig figcaption{max-width:33em}
  .ch h3{font-size:25px}
  .paper p{font-size:16px;max-width:33em}
  .stat b{font-size:42px}
}

/* reveal */
.rv{opacity:0;transform:translateY(24px);transition:opacity .36s var(--ease),transform 1s var(--ease)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  video{display:none}
  .fv img.pos,.vblock img.pos,.phv img.pos{display:block}
}


/* ============ 768px 以上（タブレット：FVは全面のまま） ============ */
@media (min-width:768px){
  :root{--gut:40px;--sec:96px}
  .hd-in{height:64px}
  .hd-logo{font-size:16px}
  .nav{inset:64px 0 auto 0}
  .fv{margin-top:64px;height:calc(100svh - 64px)}
  .fv-cap{left:var(--gut);right:var(--gut);bottom:56px}
  .fv-cap .t1{font-size:13px}
  .fv-cap .t2{font-size:40px;line-height:1.45;margin-top:18px}
  .fv-cap .t3{font-size:16px;margin-top:18px}
  .st{margin-bottom:34px}
  .st b{font-size:36px}
  .st i{font-size:14px;margin-top:12px}
  p{font-size:16px;max-width:34em}
  .lead{font-size:19px;line-height:2;max-width:30em}
  .note{max-width:34em}
  .steps{display:flex;flex-wrap:wrap;border-top:1px solid var(--line)}
  .steps li{width:33.3333%;border-bottom:0;border-right:1px solid var(--line);padding:26px 24px 26px 0;align-items:flex-start}
  .steps li:last-child{border-right:0}
  .steps li:not(:first-child){padding-left:24px}
  .steps .b{font-size:15px}
  .vblock{max-width:340px;margin-inline:auto;margin-top:48px}
  .vcap{text-align:center;font-size:12px;max-width:none}
  .nums li{width:25%;border-left:1px solid var(--line);padding:26px 18px!important}
  .nums li:first-child{border-left:0}
  .nums b{font-size:46px}
  .nums i{font-size:13px}
  .sch,.mem,.arc{display:flex;flex-wrap:wrap;border-top:1px solid var(--line)}
  .sch li,.mem li,.arc li{width:50%;border-bottom:1px solid var(--line)}
  .sch li:nth-child(odd),.mem li:nth-child(odd){padding-right:32px}
  .sch li:nth-child(even),.mem li:nth-child(even){padding-left:32px;border-left:1px solid var(--line)}
  .arc li:nth-child(even){border-left:1px solid var(--line)}
  .arc .row,.arc a{padding:24px 32px 24px 2px}
  .arc li:nth-child(even) .row,.arc li:nth-child(even) a{padding:24px 2px 24px 32px}
  .ngrid li{width:calc((100% - 42px)/4)}
  .ngrid.g3{gap:20px}
  .ngrid.g3 li{width:calc((100% - 100px)/6)}
  .ngrid figcaption{font-size:12px}
  .ngrid figcaption b{font-size:12px}
  .more{max-width:300px;margin-inline:auto;font-size:14px}
  .soon{padding:44px 30px}
  .ph{margin-top:64px;padding:72px var(--gut) 0}
  .ph b{font-size:36px}
  .ph p{font-size:16px;max-width:34em}
  .phv{max-width:720px;margin-inline:auto;margin-top:44px}
  .ft{padding:64px var(--gut) 72px}
}

/* ============ 1024px 以上（PC：FVを分割・ナビ横並び） ============ */
@media (min-width:1024px){
  :root{--gut:56px;--sec:110px}
  body{font-size:17px}
  .hd-in{height:76px}
  .burger{display:none}
  .nav{position:fixed;top:0;left:0;right:0;height:76px;inset:0 0 auto 0;z-index:51;
    background:none;border:0;transform:none;opacity:1;pointer-events:none;display:flex;align-items:center}
  .nav ul{display:flex;width:100%;justify-content:flex-end;align-items:center;gap:26px;padding:0 var(--gut)}
  .nav li{border-bottom:0}
  .nav a{display:flex;align-items:center;padding:11px 0;font-size:13px;min-height:44px;pointer-events:auto;
    font-family:"Outfit",sans-serif;font-weight:400;letter-spacing:.08em;color:var(--ink)}
  .nav a i{display:none}
  .nav a:hover{color:var(--vivid)}

  .fv{margin-top:76px;height:auto;min-height:calc(100svh - 76px);display:flex;align-items:center;
    gap:72px;padding:90px var(--gut);background:#fff;overflow:visible}
  .fv::after{display:none}
  .fv-media{position:relative;flex:0 0 auto;order:2;width:auto;height:min(68svh,620px);
    aspect-ratio:9/16;overflow:hidden;background:#eef5f6;inset:auto}
  .fv-cap{position:static;flex:1 1 auto;color:var(--ink);order:1}
  .fv-cap .t1{color:var(--sub);text-shadow:none;font-size:13px}
  .fv-cap .t2{font-size:54px;line-height:1.42;margin-top:22px;text-shadow:none;color:var(--accent)}
  .fv-cap .t3{font-size:17px;margin-top:24px;text-shadow:none;color:var(--ink)}

  .st b{font-size:44px}
  p{font-size:17px;max-width:33em}
  .lead{font-size:20px;max-width:29em}
  .note{max-width:33em}
  .steps .b{font-size:16px}
  .nums b{font-size:56px}
  .vblock{max-width:320px}
  .ngrid li{width:calc((100% - 84px)/5)}
  .ngrid.g3{gap:26px}
  .ngrid.g3 li{width:calc((100% - 156px)/7)}
  .ph{margin-top:76px;padding-top:90px}
  .ph b{font-size:44px}
}

/* ============ 1440px 以上 ============ */
@media (min-width:1440px){
  :root{--gut:0px;--sec:130px}
  .hd-in{max-width:1280px;margin-inline:auto;padding-inline:40px}
  .nav ul{max-width:1280px;margin-inline:auto;padding:0 40px;gap:32px}
  .fv{max-width:1280px;margin-inline:auto;padding:110px 40px;gap:96px}
  .fv-cap .t2{font-size:62px}
  .fv-media{height:min(70svh,660px)}
  .wrap{max-width:1200px;margin-inline:auto;padding-inline:0}
  .ph{max-width:1200px;margin-inline:auto;padding:110px 0 0}
  .st b{font-size:52px}
  .ngrid li{width:calc((100% - 105px)/6)}
  .ngrid.g3 li{width:calc((100% - 182px)/8)}
  .ft{padding:80px 40px 88px}
}