:root{
  --ink:#0a1130;
  --ink-2:#172048;
  --text:#3a4360;
  --muted:#7c8499;
  --line:#e6ebf3;
  --line-2:#eef2f8;
  --bg:#ffffff;
  --bg-soft:#f6f8fc;
  --blue:#1f56ff;
  --blue-2:#3a6cff;
  --grad-cta: linear-gradient(94deg,#1f56ff 0%, #3a6cff 100%);
  --grad-band: linear-gradient(95deg,#1f54ff 0%, #4a5cff 50%, #b07fe6 100%);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Noto Sans JP","Inter",system-ui,sans-serif;
  color:var(--text);
  background:#fff;
  -webkit-font-smoothing:antialiased;
  font-feature-settings:"palt";
  line-height:1.75;
  letter-spacing:.01em;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 40px}

/* ---------- NAV ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.2) blur(10px);
  border-bottom:1px solid rgba(230,235,245,.4);
}
.nav-inner{
  max-width:1340px;margin:0 auto;padding:18px 40px;
  display:flex;align-items:center;gap:36px;
}
.brand img{height:54px;width:auto;display:block}
.nav-links{
  display:flex;gap:34px;margin-left:auto;
  font-size:14px;color:var(--ink);font-weight:500;
}
.nav-links a{padding:4px 0;transition:color .2s}
.nav-links a:hover{color:var(--blue)}
.nav-cta{
  display:inline-flex;align-items:center;gap:12px;
  padding:13px 26px;border-radius:999px;
  background:var(--grad-cta);
  color:#fff;font-weight:600;font-size:14px;
  box-shadow:0 8px 18px rgba(31,86,255,.28);
  white-space:nowrap;
  transition:transform .2s, box-shadow .2s;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(31,86,255,.34)}
.nav-cta .arr svg{width:14px;height:14px}

.arr{display:inline-flex;align-items:center;justify-content:center}

/* ---------- HERO ---------- */
.hero{
  position:relative;padding:48px 0 64px;overflow:hidden;
  background:
    radial-gradient(800px 420px at 8% 0%, rgba(31,86,255,.04), transparent 60%),
    linear-gradient(180deg,#fbfcff 0%, #ffffff 80%);
}
.hero-waves{
  position:absolute;left:-60px;top:280px;width:520px;opacity:.55;pointer-events:none;
  transform:rotate(-2deg);
}
.hero-grid{
  position:relative;
  display:grid;grid-template-columns: 0.95fr 1.55fr;gap:48px;align-items:start;
  padding-top:32px;
}
h1.hero-title{
  font-family:"Noto Sans JP",sans-serif;
  font-weight:700;
  font-size:50px;line-height:1.22;letter-spacing:-.01em;
  color:#0a1130;
  margin:0 0 18px;
}
.hero-sub{
  font-size:15.5px;font-weight:600;color:var(--blue);
  margin-bottom:18px;letter-spacing:.01em;
}
.hero-sub .x{margin:0 4px;color:#3a6cff;font-weight:600}
.hero-lead{
  font-size:14.5px;color:#3a4360;
  line-height:2;margin:0 0 32px;max-width:430px;
}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary{
  display:inline-flex;align-items:center;gap:14px;
  padding:14px 28px;border-radius:999px;
  background:var(--grad-cta);color:#fff;font-weight:600;font-size:14px;
  box-shadow:0 10px 22px rgba(31,86,255,.28);
  white-space:nowrap;
  transition:transform .2s, box-shadow .2s;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(31,86,255,.34)}
.btn-primary .arr svg{width:14px;height:14px}
.btn-outline{
  display:inline-flex;align-items:center;gap:14px;
  padding:13px 26px;border-radius:999px;
  border:1.5px solid #c9d3ef;background:#fff;
  color:var(--ink);font-weight:600;font-size:14px;
  white-space:nowrap;
  transition:border-color .2s, color .2s;
}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-outline .arr svg{width:14px;height:14px;color:var(--blue)}

/* Hero photo strip */
.hero-photos{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:14px;
}
.hp .img{
  position:relative;border-radius:14px;overflow:hidden;
  aspect-ratio: 1 / 1.35;
  box-shadow:0 16px 40px rgba(20,40,90,.10);
  background:#0a1130;
}
.hp .img img{width:100%;height:100%;object-fit:cover}
.hp .nano-tag{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);z-index:2;
  color:#fff;font-weight:700;font-size:14px;
  text-shadow:0 2px 6px rgba(0,0,0,.6);
  letter-spacing:.02em;
}
.hp .cap{
  padding:14px 6px 0;
}
.hp h3{
  font-size:16px;font-weight:700;color:var(--blue);
  margin:0 0 6px;line-height:1.35;
}
.hp p{
  font-size:12px;color:#3a4360;line-height:1.7;margin:0;font-weight:500;
}

/* ---------- SECTION SHARED ---------- */
section{position:relative}
.sec-label{
  font-family:"Inter",sans-serif;
  font-size:12px;font-weight:700;letter-spacing:.3em;
  color:var(--blue);text-transform:uppercase;margin-bottom:8px;
}
.sec-title{
  font-size:30px;font-weight:700;color:var(--ink);
  margin:0;letter-spacing:.005em;
}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  margin-bottom:32px;
}
.sec-link{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;color:var(--blue);
}
.sec-link svg{transition:transform .2s;width:16px;height:16px}
.sec-link:hover svg{transform:translateX(3px)}

/* ---------- ABOUT ---------- */
.about{
  padding:72px 0 88px;background:#fff;
}
.about-grid{
  display:grid;grid-template-columns:0.7fr 1.6fr;gap:48px;align-items:start;
}
.about .sec-title{margin-bottom:24px}
.about-lead{
  font-size:13.5px;color:#3a4360;line-height:2.1;
  margin:0 0 12px;max-width:320px;
}
.about-lead + .about-lead{margin-bottom:28px}
.about-cards{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.acard{
  background:#fff;border:1px solid var(--line-2);border-radius:18px;
  padding:30px 18px 28px;text-align:center;
  box-shadow:0 2px 8px rgba(20,40,90,.03);
  transition:transform .25s, box-shadow .25s, border-color .25s;
}
.acard:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(20,40,90,.08);border-color:#d8e1f2}
.acard .ic{
  height:72px;display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.acard .ic svg{width:58px;height:58px;color:var(--blue)}
.acard h3{
  font-size:15.5px;font-weight:700;color:var(--ink);
  margin:0 0 12px;
}
.acard p{
  font-size:12.5px;color:#5a6480;line-height:1.85;margin:0;
}

/* ---------- PROJECTS ---------- */
.projects{padding:24px 0 80px}
.proj-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
}
.proj{
  background:#fff;border:1px solid var(--line-2);border-radius:14px;
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:0 2px 8px rgba(20,40,90,.03);
  transition:transform .25s, box-shadow .25s;
}
.proj:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(20,40,90,.10)}
.proj .thumb{
  position:relative;aspect-ratio:1/0.62;overflow:hidden;
}
.proj .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.proj:hover .thumb img{transform:scale(1.04)}
.proj .nano-on{
  position:absolute;left:14px;top:50%;transform:translateY(-50%);z-index:2;
  color:#fff;font-weight:700;font-size:14px;
  text-shadow:0 2px 6px rgba(0,0,0,.6);
}
.proj .body{
  padding:18px 20px 22px;
  display:flex;flex-direction:column;gap:8px;flex:1;
}
.proj h3{
  font-size:15px;font-weight:700;color:var(--ink);
  margin:0;line-height:1.5;
}
.proj p{font-size:12.5px;color:#5a6480;line-height:1.85;margin:0}

/* ---------- ACHIEVEMENTS ---------- */
.achv{padding:24px 0 72px}
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  margin-bottom:32px;
}
.stat{
  background:#fff;border:1px solid var(--line-2);border-radius:14px;
  padding:24px 24px 26px;
  box-shadow:0 2px 8px rgba(20,40,90,.03);
}
.stat .top{
  display:flex;align-items:flex-start;gap:14px;margin-bottom:16px;
}
.stat .icon{
  flex:0 0 auto;width:42px;height:42px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  color:var(--blue);
}
.stat .icon svg{width:38px;height:38px}
.stat .lbl{
  font-size:13px;color:var(--ink);font-weight:700;line-height:1.55;
}
.stat .lbl small{display:block;font-size:11.5px;color:var(--muted);font-weight:500;margin-top:2px}
.stat .num{
  font-family:"Inter",sans-serif;
  font-size:46px;font-weight:700;color:var(--blue);
  line-height:1;letter-spacing:-.02em;
  display:flex;align-items:baseline;gap:6px;
}
.stat .unit{font-size:14px;color:var(--ink);font-weight:600}
.stat .sub{
  font-family:"Inter",sans-serif;
  font-size:12px;color:var(--muted);margin-top:10px;letter-spacing:.04em;
  line-height:1.5;
}

/* Publications */
.pubs{padding-top:14px}
.pubs-head{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  margin-bottom:20px;
}
.pubs-head h3{
  font-size:16px;font-weight:700;color:var(--ink);margin:0;
}
.pubs-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
  padding-top:18px;border-top:1px solid var(--line);
}
.pub{
  font-family:"Inter",sans-serif;
}
.pub .date{
  font-size:12.5px;color:#5a6480;font-weight:600;margin-bottom:2px;letter-spacing:.02em;
}
.pub .venue{
  font-size:12.5px;color:#5a6480;font-weight:500;margin-bottom:10px;letter-spacing:.01em;
}
.pub .title{
  font-size:13px;color:var(--ink);font-weight:500;line-height:1.65;
}

/* ---------- CTA BAND ---------- */
.ctaband{
  padding:24px 0 56px;
}
.ctaband-inner{
  position:relative;overflow:hidden;
  background:var(--grad-band);
  border-radius:14px;
  padding:32px 44px;
  color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:0 20px 50px rgba(60,80,200,.18);
}
.ctaband-inner::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(700px 280px at 5% 130%, rgba(255,255,255,.15), transparent 60%),
    radial-gradient(600px 240px at 92% -10%, rgba(255,255,255,.12), transparent 60%);
}
.ctaband-deco{
  position:absolute;right:18%;top:0;height:100%;width:60%;
  opacity:.45;pointer-events:none;
  object-fit:cover;mix-blend-mode:screen;filter:brightness(1.4);
}
.ctaband h2{
  font-size:24px;font-weight:700;margin:0 0 8px;letter-spacing:.005em;
  position:relative;
}
.ctaband p{margin:0;font-size:13px;opacity:.94;line-height:1.85;position:relative}
.btn-white{
  position:relative;
  display:inline-flex;align-items:center;gap:14px;
  background:#fff;color:var(--ink);font-weight:700;
  padding:16px 32px;border-radius:999px;font-size:14px;
  white-space:nowrap;
  box-shadow:0 10px 24px rgba(0,0,30,.16);
  transition:transform .2s, box-shadow .2s;
}
.btn-white:hover{transform:translateY(-1px);box-shadow:0 14px 30px rgba(0,0,30,.22)}
.btn-white .arr svg{color:var(--blue);width:14px;height:14px}

/* ---------- FOOTER ---------- */
footer{padding:20px 0 28px;background:#fff}
.foot-grid{
  display:grid;grid-template-columns:auto 1fr auto;gap:48px;align-items:center;
  padding:18px 0 24px;
}
.foot-brand img{height:64px;width:auto}
.foot-nav{
  display:grid;grid-template-columns:repeat(4,auto);gap:14px 36px;justify-content:center;
  font-size:13px;color:var(--ink);font-weight:500;
}
.foot-nav a:hover{color:var(--blue)}
.foot-contact{
  font-size:12.5px;color:#3a4360;line-height:1.85;text-align:left;
  display:grid;gap:6px;
}
.foot-contact .row{display:flex;align-items:flex-start;gap:10px}
.foot-contact .row svg{width:18px;height:18px;color:var(--blue);margin-top:2px;flex:0 0 auto}
.foot-contact .mail-text{color:var(--ink);font-weight:600}
.foot-copy{
  border-top:1px solid var(--line);
  padding:18px 0 0;text-align:center;
  font-size:11.5px;color:var(--muted);letter-spacing:.04em;
  font-family:"Inter",sans-serif;
}

@media (max-width: 1080px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  h1.hero-title{font-size:38px}
  .hero-photos{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .about-cards{grid-template-columns:repeat(2,1fr)}
  .proj-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .pubs-grid{grid-template-columns:repeat(2,1fr)}
  .ctaband-inner{flex-direction:column;align-items:flex-start;gap:20px;padding:28px}
  .foot-grid{grid-template-columns:1fr;gap:24px}
  .foot-nav{grid-template-columns:repeat(3,auto)}
}

//-----------------------------
//新テーマ移植時に追加

.subpage {
  padding: 120px 0 80px;
  background: #fbfcff;
}

.subpage-content {
  max-width: 920px;
  margin: 0 auto;
  background: #fff;
  border-radius: 24px;
  padding: 56px;
  box-shadow: 0 16px 40px rgba(10, 17, 48, 0.08);
}

.subpage .entry-content {
  margin-top: 32px;
  color: var(--text);
  line-height: 1.9;
}

.subpage .entry-content h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  color: var(--ink);
}

.subpage .entry-content p {
  margin-bottom: 1.2em;
}

//-----------------------------------
//言語切り替え機能のスタイル
.lang-switch ul {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;

  list-style: none;
  margin: 0;
  padding: 0;
}

.lang-switch li {
  margin: 0;
  padding: 0;
}

.lang-switch a {
  text-decoration: none;
  font-weight: 700;
  text-transform: uppercase;
  color: #0a1130;
}

.lang-switch .current-lang a {
  color: #1f56ff;
}

.lang-switch a:hover {
  opacity: .6;
}

.lang-switch .current-lang a {
  color: var(--blue);
}

.lang-switch ul {
  display: flex !important;
}