:root{--safety: #4f46e5;--safety-600: #4338ca;--safety-dark: #3730a3;--safety-50: #eef2ff;--safety-200: #c7d2fe;--ink: #0f172a;--ink-2: #1e293b;--body: #334155;--muted: #64748b;--line: #e2e8f0;--wash: #f8fafc;--shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px -12px rgba(15,23,42,.18)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;color:var(--ink);background:#fff;line-height:1.85;font-family:ui-sans-serif,system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;-webkit-font-smoothing:antialiased;font-feature-settings:"palt" 1}a{color:inherit;text-decoration:none}img{max-width:100%}.site-head{position:sticky;top:0;z-index:40;background:#ffffffe0;backdrop-filter:blur(12px) saturate(1.4);border-bottom:1px solid var(--line)}.site-head:before{content:"";display:block;height:3px;background:linear-gradient(90deg,#312e81,var(--safety) 45%,#818cf8)}.site-head .inner{max-width:1120px;margin:0 auto;padding:11px 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