:root{--color-bg: #ffffff;--color-bg-soft: #f7f8fa;--color-bg-card: #ffffff;--color-text: #1a1f2e;--color-text-soft: #5a6478;--color-text-muted: #8a93a3;--color-border: #e3e7ed;--color-border-soft: #eef0f4;--color-primary: #0d3b66;--color-primary-soft: #e6ecf3;--color-accent: #f4731e;--color-accent-hover: #d45e0c;--color-success: #2e8b57;--color-warning: #d97706;--color-danger: #c1432f;--font-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "YuGothic", "Yu Gothic", "Noto Sans JP", "Meiryo", system-ui, -apple-system, sans-serif;--font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;--max-width: 760px;--max-width-wide: 1100px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(13, 59, 102, .06);--shadow-md: 0 4px 12px rgba(13, 59, 102, .08);--shadow-lg: 0 8px 28px rgba(13, 59, 102, 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3rem}h1{font-size:1.5rem}h2{font-size:1.25rem}}.site-header[data-astro-cid-3ef6ksr2]{background:#fff;border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:50;backdrop-filter:saturate(180%) blur(8px);background-color:#ffffffeb}.header-inner[data-astro-cid-3ef6ksr2]{max-width:var(--max-width-wide);margin:0 auto;padding:.75rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:center;gap:.4rem;text-decoration:none;color:var(--color-primary);font-weight:800;font-size:1.05rem}.brand-mark[data-astro-cid-3ef6ksr2]{font-size:1.3rem}.nav[data-astro-cid-3ef6ksr2]{display:flex;gap:.25rem;list-style:none;margin:0;padding:0;flex-wrap:wrap}.nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:center;gap:.3rem;padding:.5rem 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