:root{--fg:#111;--muted:#666;--bg:#fff;--line:#e6e6e6;--accent:#0b57d0;--box:#f7f8fa;}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;color:var(--fg);background:var(--bg);line-height:1.7}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:980px;margin:0 auto;padding:0 16px}
.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 16px}
.brand a{font-weight:700;color:var(--fg)}
.nav{display:flex;flex-wrap:wrap;gap:12px;font-size:14px}
.skip{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip:focus{left:16px;top:16px;width:auto;height:auto;background:#fff;border:1px solid var(--line);padding:8px 10px;z-index:20}
.breadcrumb{font-size:13px;color:var(--muted);margin:18px 0 10px}
.breadcrumb a{color:var(--muted)}
.breadcrumb .sep{margin:0 6px;color:#aaa}
.content h1{font-size:28px;line-height:1.3;margin:8px 0 18px}
.content h2{font-size:20px;margin:22px 0 10px}
.content h3{font-size:16px;margin:18px 0 6px}
.box{background:var(--box);border:1px solid var(--line);border-radius:10px;padding:14px 14px;margin:14px 0}
.box.conclusion h2{margin-top:0}
.box ul{margin:8px 0 0 18px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;min-width:760px;background:#fff}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
th{background:#fafafa;font-size:13px}
.badge{display:inline-block;margin-left:8px;padding:2px 8px;border:1px solid var(--line);border-radius:999px;font-size:12px;color:var(--muted);background:#fff}
.btn{display:inline-block;margin-top:8px;background:var(--accent);color:#fff;padding:10px 14px;border-radius:10px;font-weight:600}
.btn:hover{text-decoration:none;filter:brightness(0.95)}
.muted{color:var(--muted);font-size:13px}
.note{padding:12px 14px;border-left:4px solid var(--accent);background:#f3f7ff;border-radius:10px}
.qa{border-top:1px solid var(--line);padding-top:12px;margin-top:12px}
.site-footer{border-top:1px solid var(--line);margin-top:36px;padding:22px 0;background:#fff}
.footer-nav{display:flex;gap:14px;margin-bottom:10px}
.cta-lead{margin:0}
.list-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.card{border:1px solid var(--line);border-radius:10px;padding:12px;background:#fff}
.card h3{margin:0 0 6px}