:root{
  --ground:#ffffff;
  --wash:#eef5fc;
  --wash-2:#e2eefa;
  --ink:#17232e;
  --sub:#5b7286;
  --accent:#2578d6;
  --accent-deep:#175a9e;
  --line:#d7e4f0;
  --card:#ffffff;
  --card-shadow:0 2px 16px rgba(23,90,158,.07);
  --logo-invert:0;
}
@media (prefers-color-scheme: dark){
  :root{
    --ground:#0e161e; --wash:#131f2a; --wash-2:#182734;
    --ink:#e8eff5; --sub:#8fa5b8; --accent:#5da4ea; --accent-deep:#8fc2f2;
    --line:#24384a; --card:#152230; --card-shadow:0 2px 16px rgba(0,0,0,.35);
    --logo-invert:1;
  }
}
:root[data-theme="dark"]{
  --ground:#0e161e; --wash:#131f2a; --wash-2:#182734;
  --ink:#e8eff5; --sub:#8fa5b8; --accent:#5da4ea; --accent-deep:#8fc2f2;
  --line:#24384a; --card:#152230; --card-shadow:0 2px 16px rgba(0,0,0,.35);
  --logo-invert:1;
}
:root[data-theme="light"]{
  --ground:#ffffff; --wash:#eef5fc; --wash-2:#e2eefa;
  --ink:#17232e; --sub:#5b7286; --accent:#2578d6; --accent-deep:#175a9e;
  --line:#d7e4f0; --card:#ffffff; --card-shadow:0 2px 16px rgba(23,90,158,.07);
  --logo-invert:0;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){ html{scroll-behavior:auto} *{animation:none!important;transition:none!important} }
body{
  margin:0; background:var(--ground); color:var(--ink);
  font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic Medium","Yu Gothic",-apple-system,BlinkMacSystemFont,sans-serif;
  line-height:1.95; font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent-deep)}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* ---------- logo ---------- */
:root{--logo:url(logo.png)}
.logo-img{
  display:block;background:var(--logo) center/contain no-repeat;
  aspect-ratio:640/183;filter:invert(var(--logo-invert,0));
}

/* ---------- header ---------- */
header.site{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:14px clamp(20px,4vw,48px);
  background:color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand .logo-img{height:32px;width:112px}
.brand .full{font-size:11px;color:var(--sub);letter-spacing:.04em}
@media (max-width:720px){.brand .full{display:none}}
nav.global{display:flex;gap:clamp(10px,2.2vw,28px);flex-wrap:wrap}
nav.global a{
  text-decoration:none;color:var(--ink);letter-spacing:.03em;
  padding:2px 2px;border-bottom:2px solid transparent;
  display:flex;flex-direction:column;align-items:center;line-height:1.3;
}
nav.global a .en{font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-weight:600;font-size:13px;letter-spacing:.08em}
nav.global a .ja{font-size:10px;color:var(--sub)}
nav.global a:hover{border-bottom-color:var(--accent)}
nav.global a:hover .en{color:var(--accent-deep)}

/* ---------- hero ---------- */
.hero{
  position:relative; overflow:hidden;
  background:linear-gradient(160deg,var(--wash) 0%,var(--ground) 70%);
  padding:clamp(76px,13vh,140px) clamp(20px,6vw,72px) clamp(86px,14vh,150px);
}
.hero .panels{position:absolute;inset:0;pointer-events:none}
.hero .panels i{position:absolute;display:block;will-change:transform}
.hero .panels .p1{width:60%;height:180%;top:-40%;right:-18%;background:var(--wash-2);transform:rotate(24deg);opacity:.8;
  animation:panelIn 1.2s cubic-bezier(.22,.8,.3,1) both, drift1 14s ease-in-out 1.2s infinite alternate}
.hero .panels .p2{width:34%;height:180%;top:-40%;right:-2%;background:var(--wash);transform:rotate(24deg);
  animation:panelIn 1.2s .12s cubic-bezier(.22,.8,.3,1) both, drift2 18s ease-in-out 1.3s infinite alternate}
.hero .panels .p3{width:10px;height:200%;top:-50%;right:38%;background:var(--accent);transform:rotate(24deg);opacity:.55;
  animation:panelIn 1.2s .24s cubic-bezier(.22,.8,.3,1) both, drift1 11s ease-in-out 1.4s infinite alternate}
@keyframes panelIn{from{transform:rotate(24deg) translateX(30vw);opacity:0}to{transform:rotate(24deg) translateX(0)}}
@keyframes drift1{from{transform:rotate(24deg) translateX(0)}to{transform:rotate(24deg) translateX(-28px)}}
@keyframes drift2{from{transform:rotate(24deg) translateX(0)}to{transform:rotate(24deg) translateX(34px)}}
.hero-inner{position:relative;max-width:1080px;margin:0 auto}
.hero .hero-logo{width:clamp(210px,26vw,320px);margin:0 0 36px}
.hero h1{
  font-size:clamp(30px,5.4vw,56px); font-weight:700; line-height:1.5;
  letter-spacing:.02em; margin:0 0 28px; text-wrap:balance;
}
.hero h1 .line{display:block}
.hero p.lead{max-width:34em;color:var(--sub);font-size:clamp(14.5px,1.6vw,17px);margin:0 0 42px}
.btn{
  display:inline-block;background:var(--accent);color:#fff;text-decoration:none;
  font-size:14.5px;letter-spacing:.08em;font-weight:600;
  padding:15px 44px;border-radius:2px;
  transition:background .2s,transform .25s,box-shadow .25s;
}
.btn:hover{background:var(--accent-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(37,120,214,.3)}
.btn.ghost{
  background:transparent;color:var(--accent-deep);border:1.5px solid var(--accent);
}
.btn.ghost:hover{background:var(--accent);color:#fff}
.reveal{opacity:0;transform:translateY(26px);animation:rise 1s cubic-bezier(.22,.8,.3,1) forwards}
.reveal.d1{animation-delay:.2s}.reveal.d2{animation-delay:.45s}.reveal.d3{animation-delay:.7s}
@keyframes rise{to{opacity:1;transform:none}}

/* floating logo blocks */
.hero .blocks{position:absolute;inset:0;pointer-events:none}
.hero .blocks b{
  position:absolute;display:block;background:var(--accent);opacity:0;
  animation:blockFloat var(--dur,16s) ease-in-out var(--delay,0s) infinite;
}
@keyframes blockFloat{
  0%{transform:translateY(30px) rotate(0deg);opacity:0}
  12%{opacity:var(--op,.16)}
  88%{opacity:var(--op,.16)}
  100%{transform:translateY(calc(-1 * var(--rise,140px))) rotate(12deg);opacity:0}
}

/* ---------- scroll reveal ---------- */
.fx{opacity:0;transform:translateY(34px);transition:opacity .9s cubic-bezier(.22,.8,.3,1),transform .9s cubic-bezier(.22,.8,.3,1)}
.fx.in{opacity:1;transform:none}
.stagger > *{opacity:0;transform:translateY(34px);transition:opacity .8s cubic-bezier(.22,.8,.3,1),transform .8s cubic-bezier(.22,.8,.3,1)}
.stagger.in > *{opacity:1;transform:none}
.stagger.in > *:nth-child(2){transition-delay:.15s}
.stagger.in > *:nth-child(3){transition-delay:.3s}
.stagger.in > *:nth-child(4){transition-delay:.45s}
.stagger.in > *:nth-child(5){transition-delay:.6s}
.sec-head .rule{transform:scaleX(0);transform-origin:left;transition:transform .9s .3s cubic-bezier(.22,.8,.3,1)}
.fx.in .rule{transform:scaleX(1)}

/* ---------- marquee band ---------- */
.band{overflow:hidden;border-block:1px solid var(--line);padding:18px 0;background:var(--ground)}
.band .track{display:flex;gap:64px;width:max-content;animation:slide 26s linear infinite}
.band span{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-weight:700;
  font-size:clamp(18px,2.6vw,26px);letter-spacing:.18em;white-space:nowrap;
  color:transparent;-webkit-text-stroke:1px var(--accent);opacity:.5;
}
.band span.solid{color:var(--accent);-webkit-text-stroke:0;opacity:.22}
.band .sq{
  align-self:center;width:11px;height:11px;background:var(--accent);opacity:.8;
  box-shadow:15px 5px 0 0 color-mix(in srgb,var(--accent) 60%,var(--ground)),
             30px 10px 0 0 color-mix(in srgb,var(--accent) 32%,var(--ground));
  margin-right:34px;
}
@keyframes slide{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
section.block{padding:clamp(64px,10vh,110px) clamp(20px,6vw,72px)}
section.block.tint{background:var(--wash)}
.inner{max-width:1080px;margin:0 auto}
.inner.narrow{max-width:820px}
.sec-head{margin-bottom:clamp(34px,6vh,56px)}
.sec-head .en{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.3em;color:var(--accent);
  display:block;margin-bottom:10px;
}
.sec-head h2{font-size:clamp(22px,3vw,30px);font-weight:700;letter-spacing:.04em;margin:0;text-wrap:balance}
.sec-head .rule{width:44px;height:3px;background:var(--accent);margin-top:18px}
.sec-head.center{text-align:center}
.sec-head.center .rule{margin-inline:auto}
.more-wrap{text-align:center;margin-top:clamp(30px,5vh,48px)}

/* ---------- page header (sub pages) ---------- */
.page-head{
  position:relative;overflow:hidden;background:var(--wash);
  padding:clamp(56px,9vh,92px) clamp(20px,6vw,72px);
  border-bottom:1px solid var(--line);
}
.page-head .ph-panels{position:absolute;inset:0;pointer-events:none}
.page-head .ph-panels i{position:absolute;display:block;transform:rotate(24deg)}
.page-head .ph-panels .a{width:42%;height:300%;top:-100%;right:-14%;background:var(--wash-2);opacity:.85}
.page-head .ph-panels .b{width:8px;height:300%;top:-100%;right:30%;background:var(--accent);opacity:.4}
.page-head .inner{position:relative}
.page-head .en{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.32em;color:var(--accent);
  display:block;margin-bottom:12px;
}
.page-head h2{margin:0;font-size:clamp(26px,4vw,40px);letter-spacing:.05em}
.page-head p.desc{margin:14px 0 0;color:var(--sub);font-size:14.5px;max-width:38em}

/* ---------- mission ---------- */
.mission-copy{font-size:clamp(19px,2.4vw,26px);font-weight:700;line-height:2;letter-spacing:.03em;margin:0 0 34px;text-wrap:balance}
.mission-body p{margin:0 0 1.6em;color:var(--ink)}
.mission-body{max-width:40em}
.pillars{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:clamp(16px,3vw,28px);margin-top:clamp(38px,6vh,60px)}
.pillar{
  background:var(--card);border:1px solid var(--line);border-radius:4px;box-shadow:var(--card-shadow);
  padding:30px 26px;
}
.pillar .p-en{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:11px;font-weight:600;letter-spacing:.26em;color:var(--accent);display:block;margin-bottom:6px;
}
.pillar h3{margin:0 0 10px;font-size:19px}
.pillar p{margin:0;font-size:13.5px;color:var(--sub)}

/* ---------- service cards (digest) ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:clamp(18px,3vw,30px)}
.svc{
  background:var(--card);border:1px solid var(--line);border-radius:4px;
  box-shadow:var(--card-shadow);
  padding:34px 28px 30px;
  transition:transform .35s cubic-bezier(.22,.8,.3,1),box-shadow .35s;
}
.svc:hover{transform:translateY(-6px);box-shadow:0 14px 30px rgba(23,90,158,.14)}
.glyph{width:44px;height:44px;margin-bottom:20px;color:var(--accent)}
.glyph svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.6}
.svc h3{font-size:17px;margin:0 0 12px;letter-spacing:.03em}
.svc p{margin:0;font-size:14px;color:var(--sub)}

/* ---------- service detail ---------- */
.detail{
  display:grid;grid-template-columns:200px 1fr;gap:clamp(22px,4vw,48px);
  padding:clamp(34px,5vh,52px) 0;border-bottom:1px solid var(--line);
}
.detail:last-of-type{border-bottom:none}
.detail .d-visual{
  background:var(--wash);border-radius:4px;display:flex;align-items:center;justify-content:center;
  min-height:150px;
}
.detail .d-visual .glyph{width:64px;height:64px;margin:0}
.detail .d-num{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:12px;font-weight:600;letter-spacing:.22em;color:var(--accent);display:block;margin-bottom:8px;
}
.detail h3{margin:0 0 16px;font-size:clamp(18px,2.2vw,22px)}
.detail p{margin:0 0 1.2em;font-size:15px}
.detail ul{margin:14px 0 0;padding-left:1.3em;font-size:14px;color:var(--sub)}
.detail ul li{margin-bottom:6px}
@media (max-width:680px){.detail{grid-template-columns:1fr}.detail .d-visual{min-height:110px}}

/* ---------- process ---------- */
.process{list-style:none;margin:0;padding:0;counter-reset:step;display:grid;gap:0}
.process li{
  counter-increment:step;position:relative;
  display:grid;grid-template-columns:64px 1fr;gap:20px;padding:22px 0 26px;
}
.process li::before{
  content:"0" counter(step);
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-weight:700;font-size:22px;color:var(--accent);letter-spacing:.05em;
  line-height:1.4;
}
.process li:not(:last-child)::after{
  content:"";position:absolute;left:14px;top:56px;bottom:0;width:2px;
  background:var(--line);
}
.process h4{margin:0 0 6px;font-size:16px;grid-column:2}
.process li::before{grid-row:1 / span 2}
.process p{margin:0;font-size:14px;color:var(--sub);grid-column:2}

/* ---------- company ---------- */
.greeting{max-width:40em}
.greeting p{margin:0 0 1.6em}
.greeting .sign{
  margin-top:34px;text-align:right;font-size:15px;
}
.greeting .sign b{font-size:18px;letter-spacing:.08em}
table.company{width:100%;border-collapse:collapse;background:var(--card);box-shadow:var(--card-shadow);font-size:15px}
table.company th,table.company td{
  text-align:left;vertical-align:top;
  padding:20px 24px;border-bottom:1px solid var(--line);
}
table.company th{width:11em;font-weight:600;color:var(--accent-deep);background:color-mix(in srgb,var(--wash) 60%,var(--card));white-space:nowrap}
table.company tr:last-child th,table.company tr:last-child td{border-bottom:none}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:4px}
@media (max-width:680px){
  table.company th{width:6.5em;white-space:normal;padding:14px 12px;font-size:13.5px}
  table.company td{padding:14px 14px;font-size:14px}
}
.history{list-style:none;margin:0;padding:0}
.history li{
  display:flex;gap:clamp(18px,4vw,40px);padding:18px 6px;border-bottom:1px solid var(--line);align-items:baseline;
}
.history time{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-variant-numeric:tabular-nums;color:var(--accent);font-weight:600;font-size:14px;white-space:nowrap;
}

/* ---------- news ---------- */
ul.news{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
ul.news li{
  display:flex;gap:clamp(16px,4vw,44px);flex-wrap:wrap;
  padding:22px 14px;border-bottom:1px solid var(--line);align-items:baseline;
  transition:background .25s;
}
ul.news li:hover{background:var(--wash)}
ul.news time{
  font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;
  font-variant-numeric:tabular-nums;color:var(--accent);font-weight:600;font-size:14px;letter-spacing:.05em;
}
ul.news .txt{font-size:15px}

/* ---------- contact ---------- */
.contact-card{
  background:var(--card);border:1px solid var(--line);border-radius:4px;box-shadow:var(--card-shadow);
  padding:clamp(30px,5vw,52px);text-align:center;
}
.contact-card p{max-width:36em;margin:0 auto 30px;color:var(--sub);font-size:15px}
.contact-card small{display:block;margin-top:16px;color:var(--sub);font-size:12px}

/* ---------- cta band on subpages ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--accent-deep),var(--accent));
  border-radius:4px;padding:clamp(34px,5vw,54px);text-align:center;color:#fff;
}
:root[data-theme="dark"] .cta-band{color:#0e161e}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .cta-band{color:#0e161e} }
.cta-band h3{margin:0 0 10px;font-size:clamp(18px,2.4vw,23px);letter-spacing:.05em}
.cta-band p{margin:0 0 26px;font-size:14px;opacity:.85}
.cta-band .btn{background:var(--ground);color:var(--accent-deep)}
.cta-band .btn:hover{background:var(--wash);transform:translateY(-2px)}

/* ---------- policy pages ---------- */
.policy .inner{max-width:820px}
.policy ol{padding-left:1.4em;margin:28px 0}
.policy ol li{margin-bottom:22px}
.policy ol li b{display:block;margin-bottom:4px;color:var(--accent-deep)}
.policy .office{background:var(--wash);border-radius:4px;padding:20px 26px;font-size:14.5px;margin-top:30px}

/* ---------- page routing ---------- */
.back-row{margin-top:clamp(30px,5vh,44px)}
.back-row a{font-size:14px}

/* ---------- footer ---------- */
footer.site{
  background:var(--wash);border-top:1px solid var(--line);
  padding:44px clamp(20px,6vw,72px) 34px;
}
footer .inner{max-width:1080px;margin:0 auto;display:flex;flex-direction:column;gap:22px}
footer .foot-logo{width:140px;opacity:.9}
footer .flinks{display:flex;gap:26px;flex-wrap:wrap;font-size:13px}
footer .flinks a{color:var(--sub);text-decoration:none}
footer .flinks a:hover{color:var(--accent-deep);text-decoration:underline}
footer .copy{font-size:12px;color:var(--sub);letter-spacing:.04em}

@media (prefers-reduced-motion: reduce){
  .reveal,.fx,.stagger > *{opacity:1!important;transform:none!important}
  .sec-head .rule{transform:none}
  .band .track{animation:none}
}