:root{
  --paper:#fff;--paper-2:#f4f6f8;--ink:#14161a;--ink-2:#2a2d33;--mute:#6b6e74;
  --line:rgba(20,22,26,.14);--line-2:rgba(20,22,26,.06);
  --anchor:#1f4555;--blue:#39778c;--pale:#a6cfda;
  --pad:clamp(24px,5vw,88px);--maxw:920px;
  --display:"Cormorant Garamond","Noto Serif JP",Georgia,serif;
  --serif:"Noto Serif JP","Cormorant Garamond",serif;
  --sans:"Noto Sans JP",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
a{color:inherit;text-decoration:none;}
img,svg{display:block;max-width:100%;}
::selection{background:var(--ink);color:var(--paper);}

.nav{position:fixed;inset:0 0 auto;z-index:60;background:rgba(31,69,85,.94);backdrop-filter:saturate(140%) blur(14px);border-bottom:1px solid rgba(255,255,255,.08);color:#fff;}
.nav-inner{max-width:1320px;margin:auto;padding:18px var(--pad);display:flex;align-items:center;justify-content:space-between;gap:32px;}
.brand{display:inline-flex;align-items:center;min-width:0;}
.brand-logo{width:248px;height:62px;object-fit:contain;object-position:left center;}
.back{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.72);}
.back:hover{color:#fff;}

.article-header{padding:144px var(--pad) 62px;background:radial-gradient(900px 500px at 100% 0%,rgba(57,119,140,.08),transparent 55%),var(--paper);border-bottom:1px solid var(--line);}
.article-header .inner,.article-body,.article-foot{max-width:var(--maxw);margin:auto;}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:28px;font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--mute);text-transform:uppercase;}
.crumbs span{color:var(--ink);}
.meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:22px;}
.meta .tag{padding:5px 11px;border:1px solid var(--blue);font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--blue);text-transform:uppercase;}
.meta time{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--mute);}
.article-header h1{font-family:var(--serif);font-size:clamp(28px,4vw,44px);font-weight:500;line-height:1.55;letter-spacing:.01em;text-wrap:balance;}
.article-header h1 em{font-family:var(--display);font-style:italic;font-weight:400;color:var(--blue);}
.article-header .lede{margin-top:28px;font-family:var(--serif);font-size:16px;line-height:2;color:var(--ink-2);text-wrap:pretty;}

.article-body{padding:64px var(--pad) 28px;}
.article-body h2{margin:52px 0 20px;padding-left:16px;border-left:3px solid var(--blue);font-family:var(--serif);font-size:23px;font-weight:600;line-height:1.55;}
.article-body h2:first-child{margin-top:0;}
.article-body p{margin-bottom:22px;font-family:var(--serif);font-size:15.5px;line-height:2.05;color:var(--ink-2);text-wrap:pretty;}
.article-body strong{color:var(--ink);font-weight:600;}
.article-body ul{list-style:none;display:grid;gap:12px;margin:0 0 28px;}
.article-body li{position:relative;padding:18px 20px 18px 42px;background:var(--paper-2);font-family:var(--serif);font-size:14px;line-height:1.85;color:var(--ink-2);}
.article-body li::before{content:"";position:absolute;left:20px;top:31px;width:9px;height:1px;background:var(--blue);}
.info-card{margin:32px 0;padding:28px 30px;border:1px solid var(--line);border-top:3px solid var(--blue);background:var(--paper);}
.info-row{display:grid;grid-template-columns:180px 1fr;border-bottom:1px solid var(--line-2);}
.info-row:last-child{border-bottom:0;}
.info-row .key{padding:15px 18px;background:var(--paper-2);font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--mute);text-transform:uppercase;}
.info-row .value{padding:15px 18px;font-family:var(--serif);font-size:15px;line-height:1.8;color:var(--ink);}
.note{margin-top:38px;padding:20px 24px;border-left:2px solid var(--line);background:var(--paper-2);font-family:var(--serif);font-size:12.5px;line-height:1.9;color:var(--mute);}
.contact-link{display:inline-flex;align-items:center;gap:12px;min-height:48px;margin-top:6px;padding:13px 18px;background:var(--anchor);color:#fff;font-family:var(--sans);font-size:12.5px;letter-spacing:.08em;}
.contact-link:hover{background:var(--blue);}

.article-foot{margin-top:26px;padding:30px var(--pad) 0;border-top:1px solid var(--line);}
.article-foot a{display:inline-flex;align-items:center;gap:10px;min-height:44px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--mute);}
.article-foot a:hover{color:var(--blue);}
footer{margin-top:64px;padding:38px 0 26px;background:var(--ink);color:rgba(246,245,241,.6);}
.foot-inner{max-width:1320px;margin:auto;padding:0 var(--pad);display:flex;justify-content:space-between;align-items:center;gap:20px;font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;}
.foot-logo{width:180px;height:45px;object-fit:contain;object-position:left center;}

@media(max-width:600px){
  :root{--pad:18px;}
  .nav-inner{min-height:64px;padding:9px var(--pad);gap:10px;}
  .brand-logo{width:150px;height:38px;}
  .back{width:44px;height:44px;justify-content:center;font-size:0;flex:none;margin-right:-8px;}
  .back svg{width:24px;height:12px;}
  .article-header{padding:92px var(--pad) 40px;}
  .crumbs{gap:6px;margin-bottom:18px;font-size:9px;line-height:1.7;letter-spacing:.1em;}
  .crumbs a:nth-of-type(2){display:none;}
  .meta{gap:8px;margin-bottom:17px;}
  .meta .tag{padding:5px 8px;font-size:8.5px;letter-spacing:.1em;}
  .meta time{font-size:10px;}
  .article-header h1{font-size:25px;line-height:1.6;}
  .article-header .lede{margin-top:20px;font-size:13.5px;line-height:1.95;}
  .article-body{padding:42px var(--pad) 22px;}
  .article-body h2{margin:38px 0 16px;padding-left:12px;font-size:19px;line-height:1.6;}
  .article-body p{margin-bottom:18px;font-size:13.5px;line-height:2;}
  .article-body ul{gap:8px;}
  .article-body li{padding:15px 15px 15px 34px;font-size:13px;line-height:1.85;}
  .article-body li::before{left:15px;top:27px;width:7px;}
  .info-card{margin:26px 0;padding:0;border-top-width:3px;}
  .info-row{grid-template-columns:1fr;}
  .info-row .key{padding:9px 13px;font-size:8.5px;}
  .info-row .value{padding:12px 13px;font-size:13.5px;}
  .note{margin-top:30px;padding:17px 16px;font-size:11.5px;}
  .contact-link{width:100%;justify-content:space-between;margin-top:4px;}
  .article-foot{padding:24px var(--pad) 0;}
  footer{margin-top:44px;padding:28px 0 max(22px,env(safe-area-inset-bottom));}
  .foot-inner{align-items:flex-start;flex-direction:column;gap:12px;font-size:9px;line-height:1.8;letter-spacing:.1em;}
  .foot-logo{width:150px;height:38px;}
}