:root{--bg: #fbfbfd;--surface: #ffffff;--surface-2: #f1f1f4;--ink: #1a1a1c;--ink-2: #55555c;--ink-3: #85858c;--line: rgba(0, 0, 0, .09);--line-strong: rgba(0, 0, 0, .16);--accent: #0b6b61;--accent-hover: #084f48;--accent-wash: rgba(11, 107, 97, .09);--chrome-bg: rgba(251, 251, 253, .72);--shadow-card: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .05);--font-ja: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", "Yu Gothic Medium", "Noto Sans JP", system-ui, sans-serif;--text-xs: .8125rem;--text-sm: .9375rem;--text-base: 1.0625rem;--text-lg: 1.1875rem;--text-xl: 1.4375rem;--text-2xl: clamp(1.75rem, 1.2rem + 2.4vw, 2.375rem);--measure: 44rem;--gutter: clamp(1.125rem, 4vw, 2rem)}:root:not([data-theme=light]){color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #0b0b0d;--surface: #16161a;--surface-2: #202025;--ink: #f2f2f5;--ink-2: #b6b6be;--ink-3: #8b8b93;--line: rgba(255, 255, 255, .11);--line-strong: rgba(255, 255, 255, .2);--accent: #56cfc1;--accent-hover: #85e0d5;--accent-wash: rgba(86, 207, 193, .13);--chrome-bg: rgba(11, 11, 13, .72);--shadow-card: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);color-scheme:dark}}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-ja);font-size:var(--text-base);line-height:1.9;letter-spacing:.01em;line-break:strict;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3{font-feature-settings:"palt" 1;line-height:1.4;text-wrap:balance;line-break:strict;overflow-wrap:anywhere}h1{font-size:var(--text-2xl);line-height:1.28;letter-spacing:-.021em;font-weight:700;margin:0 0 .6rem}h2{font-size:var(--text-xl);letter-spacing:-.012em;font-weight:700;margin:3.2rem 0 1rem}h3{font-size:var(--text-lg);letter-spacing:-.006em;font-weight:650;margin:2.2rem 0 .6rem}p{margin:0 0 1.35rem}a{color:var(--accent);text-decoration-color:color-mix(in srgb,var(--accent) 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.9rem;max-width:34rem;line-height:1.8}.site-footer nav{display:flex;flex-wrap:wrap;gap:1.25rem;margin-bottom:.5rem}.site-footer a{color:var(--ink-2);text-decoration:none}.site-footer a:hover{color:var(--ink)}.copyright{margin:0}.pr-notice{display:flex;align-items:baseline;gap:.5rem;margin:1.5rem 0 2rem;font-size:var(--text-xs);line-height:1.7;color:var(--ink-2);letter-spacing:.015em}.pr-badge{flex:none;font-size:.6875rem;font-weight:700;letter-spacing:.06em;color:var(--ink-2);border:1px solid var(--line-strong);border-radius:4px;padding:0 .3rem}.ai-note{margin:0;font-size:var(--text-xs);line-height:1.8;color:var(--ink-3);letter-spacing:.015em}.prose{font-size:var(--text-base)}.prose>h2:first-of-type{margin-top:2.6rem}.prose strong{font-weight:700;font-size:1.02em;letter-spacing:-.004em;color:var(--ink)}.prose p:has(>strong:first-child){padding-left:.95rem;border-left:2px solid color-mix(in srgb,var(--accent) 28%,transparent);margin-bottom:1.6rem}.prose p:has(>strong:first-child) 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