:root{--bg:#f3f5f8;--card:#fff;--text:#172033;--muted:#64748b;--line:#dbe1e8;--accent:#2457d6;--dark:#111827;--soft:#eef3ff;--green:#117a4b;--orange:#9a5b00}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;line-height:1.75}a{color:var(--accent)}.site-head{background:var(--dark);color:#fff}.site-head-inner{max-width:1080px;margin:auto;padding:22px 20px}.brand{font-weight:900;font-size:14px;letter-spacing:.03em;opacity:.8}.site-head h1{margin:3px 0 4px;font-size:clamp(25px,4vw,38px);line-height:1.2}.site-head p{margin:0;color:#cbd5e1}.topnav{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.topnav a{display:inline-block;text-decoration:none;color:#fff;border:1px solid #475569;border-radius:999px;padding:7px 12px;font-size:13px;font-weight:800}.topnav a.primary{background:#fff;color:#111827;border-color:#fff}.wrap{max-width:1080px;margin:0 auto;padding:28px 20px 60px}.layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:24px}.toc{position:sticky;top:18px;align-self:start;background:var(--card);border:1px solid var(--line);border-radius:15px;padding:14px}.toc strong{display:block;margin:0 0 8px}.toc a{display:block;text-decoration:none;color:#475569;padding:6px 7px;border-radius:8px;font-size:13px}.toc a:hover{background:#f1f5f9;color:#111827}.hero{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;margin-bottom:18px}.hero h2{margin:0 0 7px;font-size:23px}.hero p{margin:5px 0}.badge{display:inline-block;border-radius:999px;padding:4px 9px;font-size:11px;font-weight:900;margin-right:5px}.free{background:#e8f7ef;color:var(--green)}.pro{background:#fff0d9;color:var(--orange)}.section{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;margin:0 0 18px}.section h2{margin:0 0 12px;font-size:22px}.section h3{margin:22px 0 7px;font-size:17px}.section p:first-child{margin-top:0}.note{background:var(--soft);border-left:4px solid var(--accent);border-radius:10px;padding:12px 14px;margin:15px 0}.warn{background:#fff7e9;border-left-color:#e38b00}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.card{border:1px solid var(--line);border-radius:14px;padding:16px;background:#fff}.card h3{margin:0 0 7px}.steps{counter-reset:step;padding:0;list-style:none}.steps li{counter-increment:step;position:relative;padding:0 0 15px 44px}.steps li:before{content:counter(step);position:absolute;left:0;top:1px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:#111827;color:white;font-weight:900}.btnrow{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{display:inline-block;text-decoration:none;border-radius:11px;padding:10px 15px;font-weight:900;background:#111827;color:#fff}.btn.secondary{background:#fff;color:#111827;border:1px solid var(--line)}code{background:#f1f5f9;border-radius:6px;padding:2px 5px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.92em}.meta{font-size:12px;color:var(--muted);word-break:break-all}.footer{max-width:1080px;margin:auto;padding:0 20px 40px;color:#64748b;font-size:12px}.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.product-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.product-card h2{margin:0 0 4px;font-size:19px}.product-card p{color:#475569}.product-card a{font-weight:900}.quicklinks{display:flex;flex-wrap:wrap;gap:8px}.quicklinks a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 11px;text-decoration:none;font-weight:800;font-size:13px;color:#334155}table{width:100%;border-collapse:collapse;margin:12px 0}th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}th{font-size:13px;color:#475569}.kicker{font-size:12px;font-weight:900;color:var(--accent);letter-spacing:.06em;text-transform:uppercase}@media(max-width:780px){.layout{grid-template-columns:1fr}.toc{position:static}.grid,.product-grid{grid-template-columns:1fr}.wrap{padding:20px 13px 45px}.site-head-inner{padding:18px 13px}.section,.hero{padding:18px}}
.htl-lang-switch{position:fixed;z-index:9999;top:10px;right:10px;display:flex;gap:2px;padding:3px;border:1px solid rgba(255,255,255,.24);border-radius:999px;background:rgba(17,24,39,.9);box-shadow:0 6px 18px rgba(0,0,0,.18);backdrop-filter:blur(8px)}
.htl-lang-switch button{appearance:none;border:0;border-radius:999px;background:transparent;color:#dbe5ef;padding:6px 9px;min-width:34px;cursor:pointer;font:800 11px/1 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.htl-lang-switch button.active{background:#fff;color:#111827}
@media(max-width:560px){.htl-lang-switch{top:6px;right:6px}.htl-lang-switch button{padding:5px 7px;min-width:30px;font-size:10px}}