:root{
  --bg:#f7f8fc;--surface:#fff;--surface-2:#f0f2ff;--text:#151829;--muted:#62677a;
  --line:#dfe2ef;--primary:#4f46e5;--primary-dark:#3730a3;--secondary:#0d9488;
  --accent:#f59e0b;--soft:#eef0ff;--warning:#fff7e6;--max:1120px;--article:800px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:var(--text);background:var(--bg);line-height:1.82}
a{color:var(--primary-dark);text-underline-offset:3px}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.nav{max-width:var(--max);margin:auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--text);font-weight:850;font-size:1.18rem}.brand-mark{width:29px;height:29px;border-radius:9px;background:linear-gradient(145deg,var(--primary),var(--secondary));box-shadow:0 6px 18px rgba(79,70,229,.2)}.brand span{color:var(--primary)}
.nav-links{display:flex;gap:20px;align-items:center}.nav-links a{text-decoration:none;color:var(--muted);font-size:.92rem}.nav-links .app-link{padding:8px 13px;border-radius:10px;background:var(--primary);color:#fff;font-weight:750}
.hero{background:linear-gradient(135deg,#eef0ff 0%,#f6fbfa 70%,#fff8eb 100%);border-bottom:1px solid var(--line)}.hero-inner{max-width:var(--max);margin:auto;padding:76px 24px 68px}.eyebrow{font-size:.8rem;letter-spacing:.13em;text-transform:uppercase;color:var(--primary);font-weight:850}.hero h1{font-size:clamp(2.2rem,5.4vw,4.1rem);line-height:1.15;max-width:880px;margin:13px 0 20px;letter-spacing:-.025em}.hero p{max-width:760px;color:var(--muted);font-size:1.08rem}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.btn{display:inline-block;padding:12px 18px;border-radius:11px;text-decoration:none;font-weight:800}.btn.primary{background:var(--primary);color:#fff}.btn.secondary{background:#fff;border:1px solid var(--line);color:var(--primary-dark)}
.wrap{max-width:var(--max);margin:auto;padding:50px 24px}.section-title{font-size:1.8rem;line-height:1.4;margin:0 0 10px}.section-lead{color:var(--muted);max-width:760px;margin:0 0 26px}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:17px;padding:24px;text-decoration:none;color:inherit;box-shadow:0 8px 28px rgba(31,35,64,.045)}.card:hover{border-color:#bebdf1;transform:translateY(-1px)}.card .kicker{font-size:.78rem;color:var(--primary);font-weight:850}.card h2,.card h3{line-height:1.45;margin:7px 0 9px}.card p{margin:0;color:var(--muted)}
.scope{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:24px}.scope div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.scope b{display:block;margin-bottom:4px}.scope span{color:var(--muted);font-size:.9rem}
.article-wrap{max-width:var(--article);margin:auto;padding:48px 24px 76px}.breadcrumb{font-size:.87rem;color:var(--muted);margin-bottom:25px}.breadcrumb a{color:var(--muted)}.article-header h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.32;margin:.35em 0}.lead{font-size:1.09rem;color:#3c4154}.meta{font-size:.87rem;color:var(--muted);margin:18px 0 34px}.article-body h2{margin-top:2.55em;padding-top:.25em;font-size:1.65rem;line-height:1.45}.article-body h3{margin-top:1.85em;font-size:1.23rem;line-height:1.5}.article-body p,.article-body li{font-size:1rem}.article-body ul,.article-body ol{padding-left:1.4em}.article-body strong{font-weight:800}
.note{background:var(--soft);border-left:4px solid var(--primary);padding:18px 20px;border-radius:9px;margin:24px 0}.warning{background:var(--warning);border-left:4px solid var(--accent);padding:18px 20px;border-radius:9px;margin:24px 0}.success{background:#edf9f7;border-left:4px solid var(--secondary);padding:18px 20px;border-radius:9px;margin:24px 0}
.comparison{width:100%;border-collapse:collapse;margin:24px 0;font-size:.92rem;background:#fff}.comparison th,.comparison td{border:1px solid var(--line);padding:12px;vertical-align:top}.comparison th{background:#eff0fb;text-align:left}.checklist{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 24px}.steps{counter-reset:step;list-style:none;padding:0!important}.steps>li{counter-increment:step;position:relative;padding:0 0 20px 50px}.steps>li::before{content:counter(step);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:800}
.product-box{background:#1f2440;color:#fff;border-radius:18px;padding:27px;margin:34px 0}.product-box h2{margin-top:0;color:#fff}.product-box p{color:#dfe3f6}.product-box a{color:#fff}.product-box .cta-row{margin-top:18px}.product-box .cta-row a{display:inline-block;background:#fff;color:#292d52;text-decoration:none;padding:10px 15px;border-radius:10px;font-weight:800}
.faq{border-top:1px solid var(--line);margin-top:44px}.faq h3{margin-bottom:6px}.related,.sources{border-top:1px solid var(--line);margin-top:48px;padding-top:28px}.related ul,.sources ul{padding-left:1.25em}.sources{font-size:.9rem;color:var(--muted)}.sources a{overflow-wrap:anywhere}
.site-footer{border-top:1px solid var(--line);background:#fff}.footer-inner{max-width:var(--max);margin:auto;padding:30px 24px;color:var(--muted);font-size:.88rem;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:760px){.nav{padding:12px 18px}.nav-links a:not(.app-link){display:none}.nav-links .app-link{font-size:.78rem;padding:7px 9px}.grid,.scope{grid-template-columns:1fr}.hero-inner{padding:52px 18px}.wrap,.article-wrap{padding-left:18px;padding-right:18px}.comparison{display:block;overflow-x:auto;white-space:normal}.footer-inner{display:block}.footer-inner div+div{margin-top:8px}}