:root{--navy:#0B1220;--yellow:#FFD400;--cyan:#3DDCFF;--ink:#111;--muted:#5b6474;--line:#e5e7eb}
*{box-sizing:border-box}body{margin:0;font-family:"Noto Sans JP",system-ui,-apple-system,"Hiragino Sans",sans-serif;color:var(--ink);line-height:1.8;background:#fff}
header{background:var(--navy);color:#fff}header .in{max-width:880px;margin:0 auto;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
header a{color:#fff;text-decoration:none}header .brand{font-weight:900;font-size:20px}header .brand span{color:var(--yellow)}
header nav a{margin-left:16px;font-size:14px;opacity:.9}
main{max-width:880px;margin:0 auto;padding:32px 20px 64px}h1{font-size:28px;margin:0 0 8px}h2{font-size:20px;margin:32px 0 8px;border-left:6px solid var(--yellow);padding-left:10px}
.meta{color:var(--muted);font-size:14px}table{border-collapse:collapse;width:100%;font-size:15px}th,td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}th{background:#f6f7f9;white-space:nowrap}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;text-align:center;padding:24px}
.lang{font-size:14px}.lang a{margin-right:10px}.hero{background:var(--navy);color:#fff;padding:48px 20px}.hero .in{max-width:880px;margin:0 auto}.hero h1{font-size:34px}.hero p{font-size:17px;opacity:.9}
.btn{display:inline-block;background:var(--yellow);color:var(--navy);font-weight:700;padding:10px 18px;border-radius:8px;text-decoration:none;margin-top:12px}
ul{padding-left:1.2em}code{background:#f3f4f6;padding:1px 5px;border-radius:4px}