:root{
      --brand:#002342; --brand-2:#0752a5;
      --ink:#1f2937; --muted:#6b7280; --bg:#ffffff; --bg-soft:#f6f8fb;
      --card:#ffffff; --radius:14px; --shadow: 0 8px 24px rgba(0,0,0,.08);
      --content-w: 1120px;
    }
    *,*::before,*::after{box-sizing:border-box}
    html,body{height:100%}
    body{margin:0;background:var(--bg);color:var(--ink);
         font-family:'Noto Sans JP', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
         line-height:1.65;-webkit-text-size-adjust:100%;text-size-adjust:100%}
    img,svg,video{max-width:100%;height:auto;display:block}
    a{color:var(--brand-2);text-decoration:underline;text-underline-offset:2px}
    .container{max-width:var(--content-w);margin-inline:auto;padding:24px clamp(16px,4vw,32px)}

    /* Header */
    .eyebrow{font-size:.85rem;color:#c7d6e6;letter-spacing:.08em}
    .hero{background:linear-gradient(180deg, color-mix(in oklab, var(--brand) 24%, #fff), #fff 34%)}
    .hero-inner{padding:48px 0 28px}
    .title{font-size:clamp(1.6rem, 3.8vw, 2.4rem);line-height:1.25;margin:.4rem 0 0;color:#0f2745}
    .subtitle{color:var(--muted);margin:.3rem 0 0;font-size:clamp(.95rem,2.4vw,1.05rem)}
    .accent-bar{height:3px;width:88px;background:linear-gradient(90deg,var(--brand),#0b63c7);border-radius:99px;margin-top:14px}

    /* Layout */
    .stack{display:grid;gap:20px}
    @media (min-width: 960px){.stack{grid-template-columns: 1fr 1fr}}
    .card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
    .card h2{margin:0 0 10px;font-size:clamp(1.1rem,2.6vw,1.35rem);line-height:1.35;color:var(--brand)}
    .card h2::after{content:"";display:block;width:56px;height:3px;background:color-mix(in oklab, var(--brand) 80%, white);border-radius:99px;margin-top:8px}

    /* Figure */
    .figure{margin:0;display:grid;gap:8px}
    .figure img{width:auto;max-width:100%;height:auto;margin-inline:auto;border-radius:12px}
    .figure figcaption{font-size:.9rem;color:var(--muted);text-align:center}

    /* Chips */
    .chips{display:flex;flex-wrap:wrap;gap:8px;margin:.5rem 0 0}
    .chip{font-size:.85rem;padding:.28rem .6rem;border:1px solid #e5e7eb;border-radius:999px;background:var(--bg-soft)}

    /* Tables */
    .table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
    table{border-collapse:collapse;width:100%;min-width:760px;background:#fff;border-radius:12px;overflow:hidden}
    th,td{border:1px solid #e5e7eb;padding:10px;vertical-align:top}
    th{background:var(--brand);color:#fff;white-space:nowrap}
    tbody tr:nth-child(odd) td{background:#fafafa}
    caption{caption-side:top;text-align:left;padding:0 0 8px;color:var(--muted);font-size:.92rem}

    /* CTA */
    .cta{display:inline-flex;align-items:center;gap:.5rem;background:var(--brand);color:#fff;text-decoration:none;border-radius:10px;padding:12px 18px;font-weight:700;box-shadow:var(--shadow);transition:transform .08s ease, filter .2s}
    .cta:hover{filter:brightness(.98)}
    .cta:active{transform:translateY(1px)}
    .sticky-cta{position:sticky;bottom:12px;z-index:40;display:flex;justify-content:center;margin-top:8px}
    .sticky-cta a{backdrop-filter:saturate(1.1) blur(6px)}

    /* Back-to-top */
    .to-top{position:fixed;inset:auto 12px 16px auto;border:none;border-radius:999px;padding:10px 12px;background:#111;color:#fff;cursor:pointer;opacity:.0;pointer-events:none;transition:opacity .2s}
    .to-top.show{opacity:.92;pointer-events:auto}
    .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

    footer{color:var(--muted);font-size:.85rem;text-align:center;padding:28px}

    @media (max-width: 880px){
      .stack{grid-template-columns: 1fr}
      .hero-inner{padding:36px 0 16px}
    }

    @media (prefers-reduced-motion: no-preference){
      .reveal{opacity:0;transform:translateY(8px);transition:opacity .5s ease, transform .5s ease}
      .reveal.in{opacity:1;transform:none}
    }