:root{
  --navy:#07101f;
  --navy2:#0a1830;
  --blue:#79aef5;
  --blue-soft:#a9c9f4;
  --light:#f4f6fa;
  --ink:#122033;
  --ink-soft:#5e6b7b;
  --line:rgba(18,32,51,.12);
  --max:1240px;
  --pad:clamp(18px,3vw,34px);
  --serif:"Yu Mincho","Hiragino Mincho ProN","Hiragino Mincho Pro",Georgia,serif;
  --sans:ui-sans-serif,system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--navy)}
body{margin:0;font-family:var(--sans);color:var(--ink);background:#fff;line-height:1.8;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit}
.col-container{width:min(var(--max),calc(100% - var(--pad)*2));margin:0 auto}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:16px;z-index:9999;padding:10px 14px;background:#fff;color:#111}

/* Header */
.col-header{position:sticky;top:0;z-index:100;background:rgba(7,16,31,.92);border-bottom:1px solid rgba(255,255,255,.09);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
.col-nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.col-brand{display:grid;gap:0;color:#fff;line-height:1.2}
.col-brand-en{font-family:Georgia,serif;font-size:24px;letter-spacing:.22em}
.col-brand-ja{margin-top:3px;font-size:8px;letter-spacing:.15em;color:rgba(255,255,255,.55)}
.col-navlinks{display:flex;align-items:center;gap:5px;margin-left:auto}
.col-navlinks a{position:relative;padding:10px 9px;font-size:11px;letter-spacing:.04em;color:rgba(255,255,255,.72)}
.col-navlinks a:hover,.col-navlinks a.is-current{color:#fff}
.col-navlinks a.is-current::after{content:"";position:absolute;left:9px;right:9px;bottom:4px;height:1px;background:var(--blue)}
.col-nav-actions{display:flex;align-items:center;gap:12px}
.col-contact{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:9px 18px;border:1px solid rgba(121,174,245,.45);font-size:11px;color:#fff;background:linear-gradient(135deg,rgba(121,174,245,.18),rgba(255,255,255,.03))}
.col-burger{display:none;width:42px;height:42px;border:1px solid rgba(255,255,255,.18);background:transparent;padding:11px}
.col-burger span{display:block;height:1px;background:#fff;margin:5px 0}
.col-mobile{display:none;border-top:1px solid rgba(255,255,255,.09);background:#07101f}
.col-mobile a{display:block;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.08);font-size:12px;color:rgba(255,255,255,.76)}

/* Hero */
.col-hero{position:relative;overflow:hidden;padding:118px 0 106px;color:#fff;background:
  radial-gradient(720px 420px at 84% 16%,rgba(79,148,238,.20),transparent 70%),
  linear-gradient(135deg,#07101f 0%,#0a1830 58%,#081323 100%)}
.col-hero::after{content:"";position:absolute;width:480px;height:480px;right:-160px;bottom:-280px;border:1px solid rgba(255,255,255,.08);border-radius:50%}
.col-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:90px;align-items:end;position:relative;z-index:1}
.col-eyebrow,.col-section-kicker{margin:0 0 17px;font-size:10px;letter-spacing:.22em;color:#8fb9ef}
.col-hero h1{margin:0;font-family:Georgia,serif;font-size:clamp(70px,9vw,128px);font-weight:400;letter-spacing:.05em;line-height:.9}
.col-hero-ja{margin:34px 0 0;font-family:var(--serif);font-size:clamp(24px,3vw,38px);font-weight:500;line-height:1.55}
.col-hero-copy{padding:0 0 5px 38px;border-left:1px solid rgba(255,255,255,.18)}
.col-hero-copy p{margin:0;max-width:560px;font-size:13px;line-height:2.15;color:rgba(255,255,255,.64)}

/* Breadcrumb */
.col-breadcrumb-wrap{background:#fff;border-bottom:1px solid var(--line)}
.col-breadcrumb{display:flex;align-items:center;gap:12px;min-height:54px;font-size:9px;letter-spacing:.08em;color:#7a8796}
.col-breadcrumb a:hover{color:#315d91}

/* Main */
.col-content{padding:105px 0 118px;background:#f7f8fa}
.col-section-head{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:end;margin-bottom:52px}
.col-section-head h2{margin:0;font-family:var(--serif);font-size:clamp(34px,4vw,54px);font-weight:500;line-height:1.2;color:#0c1c31}
.col-section-head>p{margin:0;max-width:600px;font-size:13px;line-height:2;color:#697687}
.col-article-grid{display:grid;grid-template-columns:1fr}
.col-card{background:#fff;border:1px solid rgba(15,32,54,.10);box-shadow:0 20px 55px rgba(20,39,63,.05)}
.col-card-featured{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(420px,.8fr)}
.col-card-media{display:block;overflow:hidden;background:#eaf0f6}
.col-card-media img{width:100%;height:100%;min-height:480px;object-fit:cover;transition:transform .45s ease}
.col-card-media:hover img{transform:scale(1.018)}
.col-card-body{display:flex;flex-direction:column;justify-content:center;padding:54px 56px}
.col-card-meta{display:flex;gap:18px;align-items:center;margin-bottom:22px;font-size:10px;letter-spacing:.08em;color:#8390a0}
.col-card-meta span{padding:4px 8px;border:1px solid #a8b8c9;color:#315d91}
.col-card h3{margin:0;font-family:var(--serif);font-size:clamp(25px,2.5vw,36px);font-weight:500;line-height:1.55;color:#10263f}
.col-card h3 a:hover{color:#315d91}
.col-card-body>p{margin:24px 0 0;font-size:13px;line-height:2;color:#657384}
.col-readmore{display:inline-flex;align-items:center;gap:18px;margin-top:34px;padding-top:18px;border-top:1px solid rgba(15,32,54,.12);font-size:10px;letter-spacing:.15em;color:#315d91}
.col-readmore span{font-size:16px;transition:transform .2s}
.col-readmore:hover span{transform:translateX(4px)}

.col-note{display:grid;grid-template-columns:220px 1fr;gap:50px;margin-top:46px;padding:34px 0;border-top:1px solid rgba(15,32,54,.12);border-bottom:1px solid rgba(15,32,54,.12)}
.col-note span{font-size:10px;letter-spacing:.18em;color:#5c86b7}
.col-note p{margin:0;max-width:760px;font-size:12px;line-height:2;color:#6c7887}

/* CTA */
.col-cta{padding:102px 0 106px;color:#fff;background:
  radial-gradient(700px 340px at 70% 0%,rgba(76,145,236,.18),transparent 70%),
  #07101f}
.col-cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:92px;align-items:end}
.col-cta h2{margin:0;font-family:var(--serif);font-size:clamp(32px,3.6vw,50px);font-weight:500;line-height:1.45}
.col-cta-grid>div:last-child>p{margin:0 0 28px;font-size:13px;line-height:2;color:rgba(255,255,255,.63)}
.col-cta-button{display:flex;align-items:center;justify-content:space-between;gap:25px;width:min(100%,390px);padding:17px 20px;background:#fff;color:#10243b;font-size:12px;font-weight:700}
.col-cta-button span{font-size:17px;transition:transform .2s}
.col-cta-button:hover span{transform:translateX(4px)}
.col-cta small{display:block;margin-top:12px;font-size:9px;color:rgba(255,255,255,.42)}

/* Footer */
.col-footer{padding:42px 0 48px;color:rgba(255,255,255,.55);background:#050c16;border-top:1px solid rgba(255,255,255,.09)}
.col-footer-grid{display:grid;grid-template-columns:1.3fr .65fr .65fr auto;gap:35px;align-items:start}
.col-footer-brand{margin:0!important;font-family:Georgia,serif;font-size:20px!important;letter-spacing:.24em;color:#fff!important}
.col-footer p{margin:5px 0 0;font-size:9px}
.col-footer nav{display:grid;gap:7px}
.col-footer nav a{font-size:10px}
.col-footer nav a:hover{color:#fff}
.col-footer small{font-size:9px;white-space:nowrap}

@media(max-width:1040px){
  .col-navlinks{display:none}
  .col-burger{display:block}
  .col-mobile.is-open{display:block}
  .col-card-featured{grid-template-columns:1fr 1fr}
  .col-card-body{padding:40px}
}
@media(max-width:820px){
  .col-nav{min-height:64px}
  .col-contact{display:none}
  .col-hero{padding:82px 0 70px}
  .col-hero-grid,.col-section-head,.col-cta-grid{grid-template-columns:1fr;gap:30px}
  .col-hero-copy{padding:25px 0 0;border-left:0;border-top:1px solid rgba(255,255,255,.16)}
  .col-card-featured{grid-template-columns:1fr}
  .col-card-media img{min-height:0;aspect-ratio:1200/630}
  .col-card-body{padding:34px 28px 38px}
  .col-note{grid-template-columns:1fr;gap:12px}
  .col-content{padding:76px 0 84px}
  .col-cta{padding:78px 0 80px}
  .col-footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .col-footer small{align-self:end}
}
@media(max-width:520px){
  .col-container{width:min(100% - 34px,var(--max))}
  .col-brand-en{font-size:20px}
  .col-hero h1{font-size:58px}
  .col-hero-ja{font-size:24px}
  .col-section-head{margin-bottom:34px}
  .col-section-head h2{font-size:30px}
  .col-card h3{font-size:24px}
  .pc-only{display:none}
  .col-footer-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important}
}

/* 2026-09-11: multiple article cards */
.col-article-grid{display:grid;gap:34px}