:root{--ink:#16384b;--muted:#5d7482;--brand:#16709f;--brand-2:#2e9bd4;--pale:#edf7fc;--line:#cde2f0;--warm:#fff8df;--white:#fff;--line-green:#06c755;--shadow:0 14px 40px rgba(22,70,96,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#f8fbfd;font-family:"Zen Maru Gothic","Noto Sans JP",system-ui,sans-serif;line-height:1.9}main{display:block}a{color:var(--brand)}img{max-width:100%;height:auto}.breadcrumb,.guide-article,.guide-grid{width:min(100% - 32px,860px);margin-inline:auto}.breadcrumb{display:flex;gap:.55rem;align-items:center;padding:18px 0 6px;font-size:.85rem;color:var(--muted);overflow:hidden}.breadcrumb a{white-space:nowrap}.guide-article{background:var(--white);box-shadow:var(--shadow);border-radius:18px;padding:clamp(20px,4vw,54px);margin-bottom:42px}.article-meta{color:var(--brand);font-size:.88rem;font-weight:700;letter-spacing:.04em}.article-hero h1{font-size:clamp(1.8rem,5vw,3rem);line-height:1.45;margin:.25em 0;color:#0e5c8a}.article-lead{font-size:clamp(1rem,2vw,1.18rem);font-weight:500}.hero-image{display:block;aspect-ratio:16/9;object-fit:cover;border-radius:16px;margin:24px auto}.answer-box{background:var(--warm);border-left:6px solid #f2bf31;border-radius:10px;padding:18px 22px;margin:26px 0}.answer-box p{margin:.25em 0}.answer-box__label{font-weight:800;color:#805c00}.pictogram-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:32px 0}.pictogram-card{margin:0;text-align:center;border:1px solid var(--line);border-radius:14px;padding:14px 10px;background:var(--pale)}.pictogram-card img{width:76px;height:76px;object-fit:contain}.pictogram-card figcaption{display:grid;gap:4px}.pictogram-card strong{color:#0e5c8a}.pictogram-card span{font-size:.82rem;line-height:1.55;color:var(--muted)}.toc{background:#f5f9fb;border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin:30px 0}.toc ol{columns:2;column-gap:32px;padding-left:1.4em}.toc li{break-inside:avoid;margin:.25em 0}.article-section{scroll-margin-top:24px}.article-section h2,.faq-section h2,.sources h2,.related h2,.author h2{color:#0e5c8a;font-size:clamp(1.35rem,3vw,1.85rem);line-height:1.5;border-left:6px solid var(--brand-2);background:var(--pale);padding:10px 14px;margin:42px 0 16px;border-radius:0 8px 8px 0}.section-lead{font-weight:700;font-size:1.06rem}.check-list{list-style:none;padding:0;display:grid;gap:8px}.check-list li{padding:10px 14px 10px 40px;background:#f5fafc;border-radius:8px;position:relative}.check-list li::before{content:"✓";position:absolute;left:15px;color:var(--brand);font-weight:900}.table-scroll{overflow:auto;margin:20px 0}table{border-collapse:collapse;width:100%;min-width:580px}caption{text-align:left;font-weight:700;margin-bottom:8px}th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}th{background:var(--pale);color:#0e5c8a}.guide-cta{background:linear-gradient(135deg,#e8f6fd,#fff);border:2px solid var(--brand-2);border-radius:16px;padding:clamp(20px,4vw,34px);margin:46px 0}.guide-cta h2{margin:.2em 0;font-size:1.55rem;color:#0e5c8a}.guide-cta__eyebrow{font-weight:800;color:var(--brand)}.guide-cta__actions{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 18px;border-radius:9px;text-decoration:none;font-weight:800}.button--primary{background:var(--brand);color:#fff}.button--line{background:var(--line-green);color:#fff}.button--quiet{background:#fff;color:var(--ink);border:1px solid var(--line)}.faq-section details{border:1px solid var(--line);border-radius:10px;margin:10px 0;padding:13px 16px}.faq-section summary{font-weight:800;cursor:pointer}.sources ol{padding-left:1.4em}.sources li{margin:10px 0}.sources small{display:block;color:var(--muted)}.related ul{display:grid;gap:8px}.author{border-top:1px solid var(--line);margin-top:38px}.hub-hero{padding:clamp(48px,9vw,100px) 20px;text-align:center;background:linear-gradient(145deg,#e9f7fd,#fff8db)}.hub-hero h1{font-size:clamp(2rem,6vw,3.6rem);line-height:1.35;color:#0e5c8a;margin:.2em 0}.hub-hero>p{max-width:720px;margin:0 auto 22px}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;padding:42px 0}.guide-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 8px 24px rgba(22,70,96,.06)}.guide-card>p:first-child{font-size:.82rem;color:var(--brand);font-weight:800}.guide-card h2{font-size:1.25rem;line-height:1.55}.text-link{font-weight:800}.hub-hero+.guide-grid+.guide-cta,.guide-grid+.guide-cta{width:min(100% - 32px,860px);margin-inline:auto;margin-bottom:42px}
.source-note{display:block;color:var(--muted);font-size:.9rem}.scope-note{margin:42px 0 20px;padding:18px 22px;border:1px solid var(--line);border-radius:12px;background:#f7fafc}.scope-note h2{margin:0 0 8px;font-size:1.2rem;color:#0e5c8a}.scope-note p{margin:0}.reviewer-card{display:grid;grid-template-columns:132px 1fr;gap:24px;align-items:center;padding:24px;margin-top:42px;border:1px solid var(--line);border-radius:16px;background:#f5fafc}.reviewer-card h2{margin:0 0 10px;border:0;background:none;padding:0}.reviewer-card p{margin:.35em 0}.reviewer-card__photo{width:132px;height:132px;object-fit:cover;border-radius:50%;border:4px solid #fff;box-shadow:0 5px 18px rgba(22,70,96,.15)}@media(max-width:700px){.guide-article{width:100%;border-radius:0;padding:22px 16px}.pictogram-grid{grid-template-columns:repeat(2,1fr)}.toc ol{columns:1}.guide-grid{grid-template-columns:1fr}.guide-cta__actions{display:grid}.button{width:100%}.reviewer-card{grid-template-columns:84px 1fr;gap:16px;padding:18px}.reviewer-card__photo{width:84px;height:84px}.reviewer-card p:last-child{grid-column:1/-1}}
.reading-guide{margin:24px 0;padding:18px 22px;border:1px solid var(--line);border-radius:12px;background:#f7fafc}.reading-guide h2{margin:0 0 8px;color:#0e5c8a;font-size:1.2rem}.reading-guide p{margin:.5em 0}
@media print{.site-global-header,.guide-cta,footer{display:none}.guide-article{box-shadow:none;width:100%;padding:0}.article-section{break-inside:avoid}}

/* Narrow phones: keep the shared brand row inside the viewport and preserve
   readable labels for all four pictograms. The wider mobile layout stays 2x2. */
@media(max-width:360px){
  .site-global-header__brand{min-width:0;gap:6px}
  .site-global-header__logo{width:auto;max-width:145px;height:28px}
  .site-global-header__mark{font-size:10px;letter-spacing:.04em}
  .pictogram-grid{grid-template-columns:1fr}
  .pictogram-card{display:grid;grid-template-columns:72px minmax(0,1fr);align-items:center;gap:10px;text-align:left;padding:12px}
  .pictogram-card img{width:68px;height:68px}
  .pictogram-card figcaption{text-align:left}
}