:root{
  --bg:#f7f8fb; --bg2:#ffffff; --ink:#141a2e; --ink2:#455072; --muted:#7a8296;
  --line:#e6e9f1; --brand:#1f3a8a; --brand2:#3b6ef0; --accent:#c99a3f; --accent2:#e6b756;
  --ok:#1f9d6b; --danger:#d6455b; --card:#ffffff; --shadow:0 10px 40px rgba(20,26,46,.08);
  --radius:16px;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b0f1c; --bg2:#0f1526; --ink:#eef1f8; --ink2:#c4ccdd; --muted:#8b93a7;
    --line:#1e2740; --brand:#6f97ff; --brand2:#3b6ef0; --accent:#e6b756; --accent2:#f0cd82;
    --card:#111830; --shadow:0 12px 44px rgba(0,0,0,.4); }
}
:root[data-theme="dark"]{ --bg:#0b0f1c; --bg2:#0f1526; --ink:#eef1f8; --ink2:#c4ccdd; --muted:#8b93a7;
    --line:#1e2740; --brand:#6f97ff; --brand2:#3b6ef0; --accent:#e6b756; --accent2:#f0cd82;
    --card:#111830; --shadow:0 12px 44px rgba(0,0,0,.4); }
:root[data-theme="light"]{ --bg:#f7f8fb; --bg2:#ffffff; --ink:#141a2e; --ink2:#455072; --muted:#7a8296;
    --line:#e6e9f1; --brand:#1f3a8a; --brand2:#3b6ef0; --accent:#c99a3f; --accent2:#e6b756;
    --card:#ffffff; --shadow:0 10px 40px rgba(20,26,46,.08); }
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.95;-webkit-font-smoothing:antialiased;letter-spacing:.01em}
a{color:inherit}
.wrap{max-width:1000px;margin:0 auto;padding:0 22px}
.btn{display:inline-flex;align-items:center;gap:.5em;border:none;cursor:pointer;font-weight:800;
  padding:14px 24px;border-radius:999px;font-size:1rem;transition:.2s;font-family:inherit;text-align:center;text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#1a1400;box-shadow:0 8px 26px rgba(201,154,63,.35)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:transparent;border:1.5px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand)}
header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 82%,transparent);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.back{display:flex;align-items:center;gap:9px;font-weight:900;font-size:1.02rem;color:var(--ink2);text-decoration:none}
.back:hover{color:var(--brand)}
.back .mark{width:27px;height:27px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));
  display:grid;place-items:center;color:#fff;font-weight:900;font-size:.9rem}
.back b{color:var(--accent)}
.nav-cta{display:flex;align-items:center;gap:12px}
.theme-toggle{background:transparent;border:1px solid var(--line);color:var(--ink2);border-radius:999px;
  width:36px;height:36px;cursor:pointer;font-size:1rem}
@media(max-width:560px){.nav-cta .btn{display:none}}
.article{max-width:730px;margin:0 auto;padding:0 22px}
.crumbs{font-size:.8rem;color:var(--muted);margin:26px 0 18px}
.crumbs a{color:var(--ink2);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.cat{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.06em;color:var(--brand);
  background:color-mix(in srgb,var(--brand2) 12%,transparent);padding:4px 12px;border-radius:999px;margin-bottom:16px}
h1.title{font-size:clamp(1.55rem,4.1vw,2.25rem);line-height:1.5;font-weight:900;margin:0 0 16px;letter-spacing:0}
.artmeta{font-size:.82rem;color:var(--muted);margin:0 0 8px;display:flex;gap:16px;flex-wrap:wrap}
.lead{font-size:1.06rem;color:var(--ink2);border-left:4px solid var(--accent);padding:4px 0 4px 18px;margin:22px 0 8px}
.toc{background:var(--bg2);border:1px solid var(--line);border-radius:14px;padding:20px 24px;margin:30px 0}
.toc b{display:block;font-size:.82rem;letter-spacing:.06em;color:var(--muted);margin-bottom:10px}
.toc ol{margin:0;padding-left:1.2em}
.toc li{margin:5px 0}
.toc a{color:var(--ink2);text-decoration:none;font-size:.94rem}
.toc a:hover{color:var(--brand);text-decoration:underline}
.article h2{font-size:1.4rem;font-weight:900;line-height:1.5;margin:46px 0 14px;padding-left:14px;
  border-left:5px solid var(--accent);scroll-margin-top:80px}
.article h3{font-size:1.12rem;font-weight:800;margin:30px 0 10px}
.article p{margin:0 0 18px;color:var(--ink)}
.article strong{color:var(--ink);font-weight:800;background:linear-gradient(transparent 62%,color-mix(in srgb,var(--accent2) 45%,transparent) 0)}
.article ul,.article ol{margin:0 0 20px;padding-left:1.35em}
.article li{margin:8px 0}
.article a.inl{color:var(--brand);font-weight:700;text-decoration:underline;text-underline-offset:3px}
.callout{border-radius:14px;padding:20px 24px;margin:26px 0;border:1px solid var(--line);background:var(--card)}
.callout .h{font-weight:900;margin-bottom:8px;display:flex;align-items:center;gap:9px;font-size:1.02rem}
.callout p{margin:0}
.callout.honest{border-left:5px solid var(--brand);background:color-mix(in srgb,var(--brand2) 7%,var(--card))}
.callout.honest .h{color:var(--brand)}
.callout.ok{border-left:5px solid var(--ok);background:color-mix(in srgb,var(--ok) 8%,var(--card))}
.callout.ok .h{color:var(--ok)}
.callout.warn{border-left:5px solid var(--accent);background:color-mix(in srgb,var(--accent) 9%,var(--card))}
.callout.warn .h{color:var(--accent)}
.tablewrap{overflow-x:auto;margin:24px 0}
table{border-collapse:collapse;width:100%;font-size:.92rem;min-width:460px}
th,td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
th{background:var(--bg2);font-weight:800}
td .yes{color:var(--ok);font-weight:800}
td .no{color:var(--danger);font-weight:800}
.ctabox{background:linear-gradient(135deg,var(--brand),#0f1f5a);border-radius:var(--radius);
  padding:34px 30px;margin:44px 0;color:#eef1ff;text-align:center;box-shadow:var(--shadow)}
.ctabox h3{margin:0 0 10px;color:#fff;font-size:1.3rem;font-weight:900;line-height:1.5}
.ctabox p{margin:0 auto 20px;color:#c9d4ff;max-width:520px;font-size:.96rem}
.ctabox .row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.ctabox .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.ctabox .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.related{margin:44px 0 10px}
.related b{display:block;font-size:.82rem;letter-spacing:.06em;color:var(--muted);margin-bottom:14px}
.relgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:620px){.relgrid{grid-template-columns:1fr}}
.relcard{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;
  text-decoration:none;transition:.2s}
.relcard:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 55%,var(--line))}
.relcard span{font-size:.7rem;font-weight:800;color:var(--brand)}
.relcard h4{margin:6px 0 0;font-size:.98rem;line-height:1.5;font-weight:800;color:var(--ink)}
footer{background:var(--bg2);border-top:1px solid var(--line);padding:40px 0 34px;font-size:.82rem;color:var(--muted);margin-top:50px}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:16px}
.foot-links a{color:var(--ink2);text-decoration:none}
.foot-links a:hover{color:var(--brand)}
.disc{border-top:1px solid var(--line);padding-top:16px;line-height:1.75;font-size:.76rem}