:root{
      --navy:#082848;--navy-deep:#04172A;--royal:#1848D8;--cyan:#13AECF;--sky:#7FB4F2;
      --ice-soft:#E8EEF7;--bg:#FBFCFE;--bg-soft:#F3F5FB;--text:#0a1a2c;--text-mute:#5a6b80;
      --line:rgba(8,40,72,.10);--line-on-dark:rgba(255,255,255,.14);--slant:-22deg;
      --ff:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      --ease:cubic-bezier(.16,1,.3,1);
    }
    *{margin:0;padding:0;box-sizing:border-box;}
    body{font-family:var(--ff);color:var(--text);background:var(--bg);font-size:15px;line-height:1.85;overflow-x:hidden;-webkit-font-smoothing:antialiased;}
    img,svg{display:block;max-width:100%;}
    a{color:inherit;text-decoration:none;}
    section{position:relative;}
    .scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--royal),var(--cyan));z-index:300;transition:width .12s linear;pointer-events:none;}
    .reveal{transition:opacity .9s var(--ease),transform .9s var(--ease),filter .9s var(--ease);}
    .reveal.armed{opacity:0;transform:translateY(40px);filter:blur(7px);}
    .reveal.in{opacity:1;transform:none;filter:blur(0);}
    @media(prefers-reduced-motion:reduce){.reveal{opacity:1!important;transform:none!important;filter:none!important;}}
    .slant{position:absolute;left:0;width:100%;height:clamp(34px,3.6vw,54px);z-index:6;pointer-events:none;bottom:-1px;}

    /* inline static header */
    .gpnav{position:fixed;top:16px;left:0;right:0;z-index:200;display:flex;justify-content:center;padding:0 16px;font-family:var(--ff);}
    .gpnav .bar{display:flex;align-items:center;gap:clamp(14px,2vw,30px);background:rgba(255,255,255,.97);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);border:1px solid rgba(255,255,255,.6);box-shadow:0 14px 38px rgba(15,42,74,.16),inset 0 1px 0 rgba(255,255,255,.7);border-radius:9999px;padding:11px 14px 11px 26px;max-width:1180px;width:100%;}
    .gpnav .lg{display:flex;align-items:center;flex:none;margin-right:auto;}
    .gpnav .lg img{height:60px;width:auto;display:block;}
    .gpnav .menu{display:flex;align-items:center;gap:clamp(14px,2vw,26px);}
    .gpnav .menu>a,.gpnav .dd>a{font-size:14px;font-weight:500;color:#082848;white-space:nowrap;transition:color .2s;display:inline-flex;align-items:center;gap:5px;}
    .gpnav .menu a:hover,.gpnav .dd:hover>a{color:#1848D8;}
    .gpnav a.active{color:#1848D8;font-weight:700;}
    .gpnav .caret{width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);margin-top:-3px;transition:transform .25s;}
    .gpnav .dd{position:relative;display:flex;align-items:center;height:44px;}
    .gpnav .dd::after{content:"";position:absolute;left:0;right:0;top:100%;height:16px;}
    .gpnav .dd .panel{display:flex;flex-direction:column;gap:2px;position:absolute;top:48px;left:50%;transform:translateX(-50%) translateY(8px);min-width:260px;background:#fff;border:1px solid rgba(15,42,74,.1);border-radius:16px;box-shadow:0 18px 44px rgba(15,42,74,.16);padding:10px;opacity:0;visibility:hidden;transition:opacity .2s,transform .2s;}
    .gpnav .dd:hover .panel{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);}
    .gpnav .dd:hover .caret{transform:rotate(225deg);}
    .gpnav .panel a{display:flex;flex-direction:column;gap:3px;padding:12px 15px;border-radius:10px;transition:background .2s;}
    .gpnav .panel a:hover{background:#DCEEFE;}
    .gpnav .panel .en{font-size:11px;font-weight:700;letter-spacing:.1em;color:#1848D8;}
    .gpnav .panel .lb{font-size:14.5px;font-weight:600;color:#082848;}
    .gpnav .cta{display:inline-flex;align-items:center;gap:9px;background:#082848;color:#fff;font-size:14px;font-weight:600;padding:9px 10px 9px 18px;border-radius:9999px;white-space:nowrap;flex:none;transition:background .25s;}
    .gpnav .cta:hover{background:#1848D8;}
    .gpnav .menu>a.cta{color:#fff;}
    .gpnav .cta .c{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:#fff;color:#082848;font-size:13px;}
    .gpnav .burger{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;border:none;background:transparent;cursor:pointer;padding:11px;}
    .gpnav .burger span{display:block;height:2px;width:100%;background:#082848;border-radius:2px;transition:transform .28s,opacity .2s;}
    #gpdrawer{position:absolute;opacity:0;pointer-events:none;}
    .gpdrawer{position:fixed;top:84px;left:12px;right:12px;bottom:12px;z-index:199;background:#fff;border-radius:20px;box-shadow:0 24px 60px rgba(15,42,74,.22);overflow-y:auto;padding:18px clamp(20px,5vw,28px) 28px;display:none;}
    #gpdrawer:checked ~ .gpdrawer{display:block;}
    #gpdrawer:checked ~ .gpnav .burger span:nth-child(1){transform:translateY(7px) rotate(45deg);}
    #gpdrawer:checked ~ .gpnav .burger span:nth-child(2){opacity:0;}
    #gpdrawer:checked ~ .gpnav .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
    .gpdrawer a{display:block;font-size:16px;font-weight:600;color:#082848;text-decoration:none;padding:13px 0;border-bottom:1px solid rgba(15,42,74,.06);}
    .gpdrawer .lbl{font-size:11px;font-weight:700;letter-spacing:.14em;color:#1848D8;margin:18px 0 4px;}
    .gpdrawer .cta{display:flex;align-items:center;justify-content:center;gap:8px;background:#082848;color:#fff;font-size:16px;font-weight:600;text-decoration:none;padding:16px;border-radius:9999px;margin-top:22px;border:none;}
    @media(max-width:980px){.gpnav .menu{display:none;}.gpnav .burger{display:flex;}}
    @media(min-width:981px){.gpnav .burger{display:none;}.gpdrawer{display:none!important;}}

    /* article hero */
    .ahero{position:relative;background:var(--navy);color:#fff;padding:clamp(140px,15vw,200px) 0 clamp(64px,8vw,96px);overflow:hidden;}
    .ahero .wrap{max-width:840px;margin:0 auto;padding:0 clamp(20px,4vw,40px);position:relative;z-index:5;}
    .ameta{display:flex;align-items:center;gap:14px;margin-bottom:20px;}
    .ameta .cat{font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--navy);background:var(--cyan);padding:6px 14px;transform:skewX(var(--slant));}
    .ameta .cat>span{display:inline-block;transform:skewX(calc(var(--slant) * -1));}
    .ameta .date{font-size:13px;color:rgba(255,255,255,.7);font-variant-numeric:tabular-nums;}
    .ahero h1{font-size:clamp(28px,4vw,48px);font-weight:800;letter-spacing:-.02em;line-height:1.32;}

    /* article body */
    .article{padding:clamp(56px,7vw,90px) 0 clamp(72px,9vw,120px);}
    .article .wrap{max-width:840px;margin:0 auto;padding:0 clamp(20px,4vw,40px);}
    .eyecatch{aspect-ratio:16/9;overflow:hidden;background:var(--ice-soft);margin-bottom:clamp(36px,4vw,52px);}
    .eyecatch image-slot{width:100%;height:100%;display:block;}
    .prose .lead{font-size:18px;line-height:2;color:var(--text);font-weight:600;margin-bottom:clamp(32px,4vw,44px);}
    .prose h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;color:var(--navy);letter-spacing:-.01em;line-height:1.4;margin:clamp(40px,5vw,56px) 0 18px;padding-left:18px;border-left:4px solid var(--royal);}
    .prose h3{font-size:18px;font-weight:700;color:var(--navy);margin:32px 0 12px;}
    .prose p{font-size:15.5px;line-height:2;color:var(--text);margin-bottom:20px;}
    .prose .figure{aspect-ratio:16/9;overflow:hidden;background:var(--ice-soft);margin:clamp(28px,3vw,40px) 0;position:relative;}
    .prose .figure image-slot{width:100%;height:100%;display:block;}
    .back{margin-top:clamp(48px,6vw,72px);display:flex;justify-content:center;}
    .btn-ghost{display:inline-flex;align-items:center;gap:12px;border:1.5px solid var(--navy);color:var(--navy);font-size:15px;font-weight:600;padding:16px 30px;transform:skewX(var(--slant));transition:background .3s,color .3s;}
    .btn-ghost>span{transform:skewX(calc(var(--slant) * -1));display:inline-flex;align-items:center;gap:10px;}
    .btn-ghost:hover{background:var(--navy);color:#fff;}

    /* breadcrumbs */
    .crumbs{background:var(--bg);border-top:1px solid var(--line);}
    .crumbs .cwrap{max-width:840px;margin:0 auto;padding:20px clamp(20px,4vw,40px);display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:12.5px;color:var(--text-mute);}
    .crumbs a{color:var(--text-mute);transition:color .2s;}
    .crumbs a:hover{color:var(--royal);}
    .crumbs .sep{opacity:.45;}
    .crumbs .cur{color:var(--navy);font-weight:600;}
    .article .reveal{opacity:1!important;transform:none!important;filter:none!important;transition:none!important;}
  
    .f-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:clamp(32px,5vw,64px);align-items:start;}
    .f-grid nav a{transition:color .28s cubic-bezier(.22,1,.36,1);}
    .f-grid nav a:hover{color:#fff;}
    @media(max-width:860px){.f-grid{grid-template-columns:1fr 1fr;}}
    @media(max-width:520px){.f-grid{grid-template-columns:1fr;}}