:root{
  --bg:#fffaf1;
  --paper:#ffffff;
  --ink:#233044;
  --muted:#667085;
  --line:#eadfcf;
  --accent:#e45d2b;
  --accent-2:#f3b23c;
  --soft:#fff1d6;
  --green:#237a57;
  --shadow:0 18px 40px rgba(80,50,20,.08);
  --radius:20px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;background:var(--bg);color:var(--ink);line-height:1.85} a{color:#c9481d;text-decoration:none} a:hover{text-decoration:underline}.container{width:min(1080px,92vw);margin-inline:auto}.site-header{background:rgba(255,250,241,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none}.brand:hover{text-decoration:none}.brand-mark{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--accent-2),#fff0c2);box-shadow:var(--shadow)}.brand strong{display:block;font-size:1.1rem;line-height:1.2}.brand small{display:block;color:var(--muted);font-size:.78rem}.site-nav{display:flex;flex-wrap:wrap;gap:8px}.nav-link{padding:8px 12px;border-radius:999px;color:var(--ink);font-weight:700;font-size:.92rem}.nav-link.active,.nav-link:hover{background:var(--soft);text-decoration:none}.hero{padding:70px 0 42px;background:radial-gradient(circle at 15% 10%,#ffe4b2,transparent 34%),radial-gradient(circle at 92% 18%,#ffd7c7,transparent 32%)}.hero-grid{display:grid;grid-template-columns:minmax(0,1.5fr) 360px;gap:32px;align-items:center}.eyebrow{font-weight:800;color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin:0 0 8px}.hero h1,.page-heading h1{font-size:clamp(2rem,4.2vw,3.6rem);line-height:1.18;margin:.1em 0 .35em}.lead{font-size:1.08rem;color:#4a5568}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:12px 20px;font-weight:800;border:1px solid transparent;text-decoration:none}.button:hover{text-decoration:none;transform:translateY(-1px)}.button.primary{background:var(--accent);color:#fff;box-shadow:0 12px 28px rgba(228,93,43,.22)}.button.ghost{background:#fff;color:var(--ink);border-color:var(--line)}.hero-card,.card,.article-card,.note-box,.toc-box,.cta-box,.related-box,.affiliate-notice{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-card{padding:22px}.hero-card ol{padding-left:1.3em}.section{padding:46px 0}.section-title{margin-bottom:20px}.section-title h2{font-size:clamp(1.6rem,3vw,2.2rem);margin:0}.card-grid{display:grid;gap:18px}.card-grid.three{grid-template-columns:repeat(3,1fr)}.card-grid.four{grid-template-columns:repeat(4,1fr)}.card{display:block;color:var(--ink);padding:24px;text-decoration:none}.card:hover{text-decoration:none;transform:translateY(-2px)}.card h3{margin:.3em 0}.card p{color:var(--muted);margin-bottom:0}.card-icon{font-size:2rem}.article-list{display:grid;gap:16px}.article-card{padding:22px;display:flex;justify-content:space-between;gap:20px;align-items:center}.article-card h2,.article-card h3{margin:.35em 0}.article-card p{color:var(--muted);margin:0}.badge{display:inline-flex;background:#fff1d6;color:#9c3b12;border:1px solid #ffd49a;border-radius:999px;padding:3px 10px;font-weight:800;font-size:.82rem}.text-link{font-weight:900;white-space:nowrap}.note-box{padding:24px}.page-heading{padding:56px 0 28px;background:#fff4df;border-bottom:1px solid var(--line)}.article{padding:34px 0 60px;max-width:880px}.article.narrow{max-width:780px}.breadcrumb{font-size:.9rem;color:var(--muted);margin-bottom:18px}.article-header h1{font-size:clamp(1.9rem,3.8vw,3rem);line-height:1.25;margin:.28em 0}.article-meta{color:var(--muted);font-size:.92rem}.affiliate-notice{padding:14px 16px;background:#fff8e9;color:#5b4b33;margin:22px 0}.toc-box,.cta-box,.related-box{padding:22px;margin:26px 0}.toc-box ol{margin-bottom:0}.article h2{font-size:1.65rem;margin-top:2.1em;border-left:6px solid var(--accent);padding-left:12px}.article h3{font-size:1.18rem;margin-top:1.6em}.check-list{padding-left:0;list-style:none}.check-list li{padding:8px 0 8px 34px;position:relative}.check-list li:before{content:"✓";position:absolute;left:0;top:8px;width:24px;height:24px;border-radius:50%;background:#dff5ea;color:var(--green);display:grid;place-items:center;font-weight:900;line-height:1}.table-wrap{overflow:auto;border-radius:16px;border:1px solid var(--line);background:#fff}table{width:100%;border-collapse:collapse;min-width:720px}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#fff1d6;color:#563817}tr:last-child td{border-bottom:0}.microcopy{font-size:.86rem;color:var(--muted)}details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;margin:10px 0}summary{font-weight:800;cursor:pointer}.site-footer{border-top:1px solid var(--line);background:#fff4df;padding:32px 0;color:#5b4b33}.footer-grid{display:flex;justify-content:space-between;gap:24px}.footer-grid a{display:inline-block;margin-right:14px;color:#5b4b33;font-weight:700}@media (max-width: 820px){.header-inner{align-items:flex-start;flex-direction:column}.site-nav{width:100%}.nav-link{background:#fff;font-size:.88rem}.hero{padding-top:44px}.hero-grid{grid-template-columns:1fr}.card-grid.three,.card-grid.four{grid-template-columns:1fr}.article-card{display:block}.text-link{display:inline-block;margin-top:12px}.footer-grid{display:block}.article{padding-top:24px}.article h2{font-size:1.38rem}table{font-size:.92rem}}
.footer-ad-notice{font-size:.82rem;color:#7a5a38;margin:.5em 0 0}.product-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0}.product-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}.product-card h3{margin-top:0}.product-card p{color:var(--muted)}.product-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}.button.small{padding:9px 14px;font-size:.9rem}.button.rakuten{background:#bf0000;color:#fff}.button.amazon{background:#232f3e;color:#fff}.mini-note{font-size:.9rem;color:var(--muted);background:#fff;border-left:5px solid var(--accent-2);padding:12px 14px;border-radius:12px;margin:18px 0}.priority-box{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;margin:20px 0;box-shadow:var(--shadow)}.priority-box ol{margin-bottom:0}.article .link-buttons{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}.article .link-buttons .button{min-width:150px}.ad-label{display:inline-flex;align-items:center;border:1px solid #ffd49a;background:#fff8e9;color:#7a4a1f;border-radius:999px;padding:2px 9px;font-size:.78rem;font-weight:800;margin-bottom:10px}@media (max-width: 820px){.product-grid{grid-template-columns:1fr}.article .link-buttons .button{width:100%}}