:root{
  --ink:#1b1c20;
  --ink-soft:#3a3d46;
  --ground:#f8f9fa;
  --panel:#ffffff;
  --mist:#e7eaef;
  --line:#d5d9e0;
  --accent:#4a5b85;
  --caption:#8a91a3;
  --photo-a:#232733;
  --photo-b:#3d4457;
  --photo-c:#6b7896;
}
@media (prefers-color-scheme: dark){
  :root{
    --ink:#e9eaee;
    --ink-soft:#c3c6d0;
    --ground:#131419;
    --panel:#1a1c23;
    --mist:#22242d;
    --line:#33364073;
    --accent:#93a3cd;
    --caption:#7d8497;
    --photo-a:#1c1f29;
    --photo-b:#2c3245;
    --photo-c:#525f7e;
  }
}
*{box-sizing:border-box;margin:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}
body{
  background:var(--ground);
  color:var(--ink);
  font-family:"Zen Kaku Gothic New","Hiragino Kaku Gothic ProN",sans-serif;
  font-weight:400;
  line-height:2;
  font-size:15px;
  letter-spacing:.04em;
}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:var(--accent);color:var(--ground)}
[hidden]{display:none!important}

.en{font-family:"EB Garamond",Georgia,serif}
.mincho{font-family:"Zen Old Mincho","Hiragino Mincho ProN",serif}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 32px;
  background:color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:baseline;gap:14px}
.brand .en{font-size:19px;letter-spacing:.34em;font-weight:500}
.brand small{font-size:11px;letter-spacing:.2em;color:var(--caption)}
nav{display:flex;gap:30px}
nav a{
  font-family:"EB Garamond",Georgia,serif;
  font-size:13px;letter-spacing:.22em;
  color:var(--ink-soft);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .25s,border-color .25s;
}
nav a:hover{color:var(--accent);border-color:var(--accent)}
@media (max-width:720px){ nav{display:none} }

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:82vh;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:stretch;
}
.hero-photo{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(120% 90% at 20% 110%, var(--photo-c) 0%, transparent 55%),
    radial-gradient(90% 70% at 85% 0%, var(--photo-b) 0%, transparent 60%),
    linear-gradient(160deg, var(--photo-a), var(--photo-b));
}
.hero-photo.alt{
  background:
    radial-gradient(100% 80% at 15% 0%, var(--photo-c) 0%, transparent 55%),
    linear-gradient(200deg, var(--photo-b), var(--photo-a));
}
.hero-photo::after,
.ph::after{
  content:"";
  position:absolute;inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity:.10;
  mix-blend-mode:overlay;
  pointer-events:none;
}
[data-has-photo]::after{display:none}
[data-has-photo] .ph-note{display:none}
.hero-core{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:34px;
  padding:64px 56px;
}
.tate{
  writing-mode:vertical-rl;
  font-family:"Zen Old Mincho",serif;
  font-weight:500;
}
.hero-logo{
  font-size:clamp(34px,4.6vw,52px);
  letter-spacing:.42em;
  line-height:1;
}
.hero-sub{
  font-size:11px;letter-spacing:.4em;color:var(--caption);
}
.hero-copy{
  writing-mode:vertical-rl;
  font-family:"Zen Old Mincho",serif;
  font-size:clamp(15px,1.6vw,18px);
  letter-spacing:.3em;
  line-height:2.6;
  color:var(--ink-soft);
  max-height:340px;
}
@media (max-width:860px){
  .hero{grid-template-columns:1fr;min-height:auto}
  .hero-photo{min-height:220px}
  .hero-photo.alt{display:none}
  .hero-core{padding:56px 24px}
}
.ph-note{
  position:absolute;left:18px;bottom:14px;
  font-size:10px;letter-spacing:.28em;
  color:#ffffff9e;
}

/* ---------- sections ---------- */
main{max-width:1120px;margin:0 auto;padding:0 32px}
@media (max-width:720px){ main{padding:0 20px} }
section{padding:110px 0 20px;border-bottom:1px solid var(--line)}
section:last-of-type{border-bottom:none}
.sec-head{display:flex;align-items:baseline;gap:22px;margin-bottom:56px}
.sec-head .en{
  font-size:clamp(30px,3.6vw,42px);
  letter-spacing:.16em;
  font-weight:400;
}
.sec-head .jp{
  font-size:12px;letter-spacing:.3em;color:var(--accent);
}
.lead{
  font-family:"Zen Old Mincho",serif;
  font-size:clamp(21px,2.6vw,28px);
  font-weight:500;
  line-height:2.1;
  letter-spacing:.08em;
  text-wrap:balance;
  margin-bottom:36px;
}
.prose{max-width:36em;color:var(--ink-soft)}
.prose p+p{margin-top:1.6em}

.two-col{
  display:grid;grid-template-columns:1fr 1fr;
  gap:64px;align-items:start;
  padding-bottom:90px;
}
@media (max-width:860px){ .two-col{grid-template-columns:1fr;gap:40px;padding-bottom:70px} }

.ph{
  position:relative;overflow:hidden;
  min-height:340px;height:100%;
  background:
    radial-gradient(100% 80% at 80% 100%, var(--photo-c) 0%, transparent 55%),
    linear-gradient(200deg, var(--photo-a), var(--photo-b));
}
.ph.alt{
  background:
    radial-gradient(110% 80% at 10% 0%, var(--photo-c) 0%, transparent 50%),
    linear-gradient(150deg, var(--photo-b), var(--photo-a));
}

/* message */
.msg{
  background:var(--panel);
  border:1px solid var(--line);
  padding:44px 48px;
  margin-bottom:90px;
  display:grid;grid-template-columns:auto 1fr;gap:40px;
}
@media (max-width:720px){ .msg{grid-template-columns:1fr;padding:32px 24px} }
.msg .tate-label{
  writing-mode:vertical-rl;
  font-family:"Zen Old Mincho",serif;
  font-size:15px;letter-spacing:.4em;color:var(--accent);
}
@media (max-width:720px){ .msg .tate-label{writing-mode:horizontal-tb} }
.msg h3{
  font-family:"Zen Old Mincho",serif;
  font-size:18px;font-weight:500;letter-spacing:.1em;
  margin-bottom:18px;
}
.msg p{color:var(--ink-soft);max-width:38em}
.msg .sig{margin-top:22px;font-size:13px;color:var(--caption);letter-spacing:.14em}

/* business pillars */
.pillars{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:90px}
@media (max-width:720px){ .pillars{grid-template-columns:1fr} }
.pillar{background:var(--panel);padding:40px 40px 44px}
.pillar .no{font-size:12px;letter-spacing:.3em;color:var(--caption)}
.pillar h3{
  font-family:"Zen Old Mincho",serif;
  font-size:21px;font-weight:500;letter-spacing:.08em;
  margin:14px 0 6px;
}
.pillar .pen{font-size:12px;letter-spacing:.24em;color:var(--accent);margin-bottom:20px}
.pillar p{color:var(--ink-soft);font-size:14px}

.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tags span{
  font-size:12px;letter-spacing:.12em;color:var(--accent);
  border:1px solid color-mix(in srgb, var(--accent) 45%, transparent);
  padding:5px 14px;border-radius:999px;
}

/* news */
.news-list{display:flex;flex-direction:column;border-top:1px solid var(--line);margin-bottom:90px}
.news-item{
  display:grid;grid-template-columns:130px 1fr;gap:24px;align-items:baseline;
  padding:22px 8px;border-bottom:1px solid var(--line);
  transition:background .25s;
}
.news-item:hover{background:var(--mist)}
.news-item time{font-size:13px;letter-spacing:.18em;color:var(--caption)}
.news-item .news-title{color:var(--ink-soft);font-size:14px;letter-spacing:.06em}
@media (max-width:600px){ .news-item{grid-template-columns:1fr;gap:2px;padding:18px 4px} }

/* contact */
.contact-wrap{
  padding:20px 0 110px;
  display:grid;grid-template-columns:1fr auto;gap:48px;align-items:center;
}
@media (max-width:720px){ .contact-wrap{grid-template-columns:1fr} }
.btn{
  display:inline-block;
  font-family:"EB Garamond",Georgia,serif;
  font-size:14px;letter-spacing:.28em;
  padding:20px 58px;
  border:1px solid var(--ink);
  color:var(--ink);
  transition:background .3s,color .3s;
}
.btn:hover{background:var(--ink);color:var(--ground)}

/* company / footer */
.company{padding-bottom:90px}
.company dl{
  display:grid;grid-template-columns:180px 1fr;
  border-top:1px solid var(--line);
  max-width:760px;
}
@media (max-width:600px){ .company dl{grid-template-columns:1fr} }
.company dt,.company dd{
  padding:20px 8px;border-bottom:1px solid var(--line);
}
.company dt{font-size:12px;letter-spacing:.26em;color:var(--caption)}
.company dd{color:var(--ink-soft);font-size:14px}
.company dd img{display:block;max-width:100%;height:auto;margin:3px 0}
@media (prefers-color-scheme: dark){
  .company dd img{filter:invert(.82) hue-rotate(180deg)}
}
@media (max-width:600px){
  .company dt{border-bottom:none;padding-bottom:0}
}

footer{
  border-top:1px solid var(--line);
  padding:44px 32px 54px;
  display:flex;flex-direction:column;align-items:center;gap:16px;
}
footer .en{font-size:16px;letter-spacing:.34em}
footer small{font-size:11px;letter-spacing:.16em;color:var(--caption)}

/* ---------- news article page ---------- */
.article{max-width:720px;padding:90px 32px 110px}
.article-eyebrow{font-size:13px;letter-spacing:.3em;color:var(--accent)}
.article-date{display:block;margin-top:26px;font-size:13px;letter-spacing:.18em;color:var(--caption)}
.article-title{
  font-size:clamp(22px,3vw,30px);font-weight:500;line-height:1.9;
  letter-spacing:.06em;margin:10px 0 40px;text-wrap:balance;
}
.article-thumb{
  aspect-ratio:16/9;background-size:cover;background-position:center;
  background-color:var(--mist);margin-bottom:40px;
}
.article-body{color:var(--ink-soft);margin-bottom:64px}
.article-back{
  font-size:13px;letter-spacing:.2em;color:var(--caption);
  border-bottom:1px solid var(--line);padding-bottom:2px;
  transition:color .25s,border-color .25s;
}
.article-back:hover{color:var(--accent);border-color:var(--accent)}