:root{
  --ink:#14202b;--ink2:#1c2a38;--ink3:#25344400;
  --paper:#f7f8fa;--paper2:#eef1f5;--card:#fff;
  --line:#dfe4ea;--line2:#c9d0d9;--muted:#66707d;
  --red:#ED1C24;--red-dk:#c8141b;--teal:#0f7d6b;--grey:#6D6E71;
  --wrap:1180px;--mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --disp:Archivo,'Noto Sans JP',sans-serif;--serif:'Source Serif 4',Georgia,serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--serif);background:var(--paper);color:var(--ink);line-height:1.62;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4,.disp{font-family:var(--disp);letter-spacing:-.02em;line-height:1.08}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
::selection{background:var(--red);color:#fff}

/* ---- data label / kicker (scientific) ---- */
.kicker{font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--red);display:inline-flex;align-items:center;gap:9px}
.kicker::before{content:"";width:20px;height:1px;background:var(--red);display:inline-block}
.kicker.teal{color:var(--teal)}.kicker.teal::before{background:var(--teal)}
.kicker.pale{color:#ff7a7f}.kicker.pale::before{background:#ff7a7f}
.eyebrow{font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.num{font-family:var(--mono);font-size:.78rem;color:var(--line2);font-weight:500}

/* ---- nav ---- */
.nav{position:sticky;top:0;z-index:50;background:var(--ink);color:#fff;border-bottom:1px solid #26313d}
.nav-in{display:flex;align-items:center;justify-content:space-between;min-height:66px;gap:16px}
.brand{font-family:var(--disp);font-weight:900;font-size:1.22rem;letter-spacing:-.04em;color:#fff;text-decoration:none}
.brand b{color:var(--red)}
.menu{display:flex;align-items:center;gap:22px}
.menu>a{font-family:var(--disp);font-size:.85rem;font-weight:600;color:#aab3bf;text-decoration:none;transition:color .15s;white-space:nowrap;padding:4px 0;position:relative}
.menu>a:hover,.menu>a.on{color:#fff}
.menu>a.on::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--red)}
.langs{display:flex;gap:2px;margin-left:6px;padding-left:16px;border-left:1px solid #33404f}
.langs a{font-family:var(--mono);font-size:.72rem;font-weight:500;color:#818b99;text-decoration:none;padding:5px 8px;border-radius:6px;transition:.15s}
.langs a:hover{color:#fff}
.langs a.on{background:var(--red);color:#fff}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:#fff;display:block;transition:.2s}
@media(max-width:940px){
  .burger{display:flex}
  .menu{position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:flex-start;background:var(--ink);padding:12px 24px 22px;gap:2px;transform:translateY(-135%);transition:transform .25s;box-shadow:0 24px 44px -22px rgba(0,0,0,.6);border-bottom:1px solid #26313d}
  .menu.open{transform:translateY(0)}
  .menu>a{padding:13px 0;width:100%;border-bottom:1px solid #2a3644;font-size:1rem}
  .menu>a.on::after{display:none}
  .langs{border:0;margin:14px 0 0;padding:0}
}

/* ---- sections ---- */
.section{padding:88px 0}
.section.tight{padding:56px 0}
.on-ink{background:var(--ink);color:#fff}
.on-ink p,.on-ink .lede{color:#c2cad4}
.on-paper2{background:var(--paper2)}
.rule{height:1px;background:var(--line);border:0;margin:0}
.shead{max-width:48rem;margin-bottom:44px}
.shead h2{font-size:clamp(1.9rem,3.6vw,2.8rem);margin-top:14px}
.shead p{color:var(--muted);margin-top:16px;font-size:1.1rem}
.on-ink .shead p{color:#aeb8c4}
.lede{font-family:var(--serif);font-size:1.24rem;color:var(--muted);line-height:1.55}
.prose{max-width:60rem;font-size:1.08rem}
.prose p{margin:0 0 1.25rem}
.prose h2,.prose h3{margin:2.2rem 0 .8rem}
.prose ul{margin-left:1.1rem}
.prose strong{color:var(--ink)}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--disp);font-weight:700;font-size:.9rem;padding:13px 24px;border-radius:4px;text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:.18s}
.btn-primary{background:var(--red);color:#fff}.btn-primary:hover{background:var(--red-dk)}
.btn-ghost{border-color:#c4c9d0;color:var(--ink)}.btn-ghost:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn-ghost.on-ink{border-color:#455060;color:#fff}.btn-ghost.on-ink:hover{background:#fff;color:var(--ink);border-color:#fff}

/* ---- hero ---- */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;border-bottom:3px solid var(--red)}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(52% 70% at 88% 6%,rgba(237,28,36,.20),transparent 62%),radial-gradient(40% 60% at 8% 100%,rgba(15,125,107,.14),transparent 60%)}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff0a 1px,transparent 1px),linear-gradient(90deg,#ffffff0a 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(120% 100% at 50% 0,#000,transparent 75%)}
.hero .wrap{position:relative;padding:96px 24px 104px}
.hero h1{font-size:clamp(2.3rem,5.4vw,4rem);max-width:17ch;font-weight:800}
.hero h1 em{font-style:normal;color:var(--red)}
.hero p{color:#c2cad4;font-size:1.22rem;max-width:46ch;margin-top:20px}
.hero .acts{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.hero-meta{position:absolute;right:24px;bottom:22px;font-family:var(--mono);font-size:.7rem;color:#5f6b79;letter-spacing:.08em;text-align:right;line-height:1.7}
@media(max-width:640px){.hero-meta{display:none}}

/* ---- stat band ---- */
.statband{background:var(--ink2);color:#fff;border-top:1px solid #2a3644}
.stats{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:34px 26px;border-right:1px solid #2a3644}
.stat:last-child{border-right:0}
.stat .v{font-family:var(--disp);font-size:2.4rem;font-weight:800;letter-spacing:-.03em;line-height:1}
.stat .v small{font-size:1.1rem;color:var(--red);font-weight:700}
.stat .l{font-family:var(--mono);font-size:.72rem;color:#8b95a2;text-transform:uppercase;letter-spacing:.09em;margin-top:10px;line-height:1.4}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid #2a3644}}

/* ---- grid + cards ---- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:28px;transition:.18s;position:relative}
.card:hover{transform:translateY(-3px);box-shadow:0 20px 44px -28px rgba(20,32,43,.45);border-color:var(--line2)}
.card h3{font-size:1.2rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:1rem}
.card .go{color:var(--red);font-family:var(--disp);font-weight:700;margin-top:16px;font-size:.86rem;display:inline-block}
a.card{text-decoration:none;display:block}
.card .top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:16px}

/* ---- research pillars (numbered) ---- */
.pillar{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:30px 28px;position:relative;overflow:hidden}
.pillar::before{content:"";position:absolute;top:0;left:0;width:3px;height:100%;background:var(--red)}
.pillar:nth-child(2)::before{background:var(--teal)}
.pillar:nth-child(3)::before{background:var(--grey)}
.pillar .no{font-family:var(--mono);font-size:.8rem;color:var(--line2);font-weight:500}
.pillar h3{font-size:1.22rem;margin:14px 0 10px}
.pillar p{color:var(--muted);font-size:1rem}

/* ---- partners strip ---- */
.partners{display:flex;flex-wrap:wrap;gap:14px 40px;align-items:center}
.partners span{font-family:var(--disp);font-weight:700;font-size:1.02rem;color:var(--ink);opacity:.72}
.partners .lab{font-family:var(--mono);font-size:.72rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;width:100%;margin-bottom:4px}

/* ---- study cards (citation style) ---- */
.study{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:26px;border-top:3px solid var(--teal);transition:.18s}
.study:hover{transform:translateY(-3px);box-shadow:0 20px 44px -28px rgba(20,32,43,.45)}
.study .tag{font-family:var(--mono);font-size:.68rem;color:var(--teal);text-transform:uppercase;letter-spacing:.1em;font-weight:500}
.study h3{font-size:1.08rem;margin:12px 0 14px;line-height:1.28}
.study .meta{font-family:var(--mono);font-size:.76rem;color:var(--muted);line-height:1.7;border-top:1px solid var(--line);padding-top:12px}
.study .meta b{color:var(--ink);font-weight:600}

/* ---- board ---- */
.board{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:22px}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:.18s}
.pcard:hover{transform:translateY(-4px);box-shadow:0 20px 44px -28px rgba(20,32,43,.45);border-color:var(--line2)}
.pcard .ph{aspect-ratio:1/1;background:#e7ebef;overflow:hidden}
.pcard .ph img{width:100%;height:100%;object-fit:cover;filter:grayscale(.15)}
.pcard:hover .ph img{filter:none}
.pcard .b{padding:15px 16px}
.pcard h3{font-size:1rem;letter-spacing:-.01em}
.pcard .role{font-family:var(--mono);font-size:.72rem;color:var(--red);font-weight:500;margin-top:6px;line-height:1.4}

/* ---- page hero (internal) ---- */
.phero{background:var(--ink);color:#fff;position:relative;overflow:hidden;border-bottom:3px solid var(--red)}
.phero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(120% 120% at 90% 0,#000,transparent 70%)}
.phero .wrap{position:relative;padding:64px 24px 56px}
.phero .crumb{font-family:var(--mono);font-size:.72rem;color:#7a8592;letter-spacing:.08em;text-transform:uppercase}
.phero h1{font-size:clamp(2rem,4.6vw,3.1rem);margin:16px 0 0;font-weight:800}
.phero p{color:#c2cad4;font-size:1.14rem;max-width:56ch;margin-top:16px}
.phero .kicker{margin-bottom:14px}

/* ---- callout ---- */
.callout{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--red);border-radius:8px;padding:24px 26px}

/* ---- footer ---- */
.foot{background:var(--ink);color:#8b95a2}
.foot-in{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;padding:60px 24px 26px}
.foot .brand{color:#fff;font-size:1.4rem}
.foot-tag{font-size:.95rem;margin-top:12px;max-width:34ch;line-height:1.6}
.foot-since{font-family:var(--mono);font-size:.72rem;color:#5f6b79;margin-top:16px;letter-spacing:.06em}
.foot-links{display:flex;flex-wrap:wrap;gap:10px 26px;align-content:flex-start}
.foot-links a{font-family:var(--disp);font-size:.92rem;color:#c2cad4;text-decoration:none;transition:.15s}
.foot-links a:hover{color:var(--red)}
.foot-bottom{border-top:1px solid #2a3644;font-family:var(--mono);font-size:.74rem;text-align:center;padding:18px;color:#6f7885;letter-spacing:.04em}
@media(max-width:640px){.foot-in{grid-template-columns:1fr;gap:26px}}