:root{--brand: #4054b2;--brand-dark: #33449a;--brand-tint: #eef0fa;--ink: #111318;--ink-mid: #5b6070;--ink-soft: #8b90a0;--line: #e5e7ef;--surface: #ffffff;--bg: #fafafb;--radius: 14px;--shadow-card: 0 1px 2px rgba(17, 19, 24, .04), 0 8px 24px rgba(17, 19, 24, .05);--shadow-phone: 0 18px 50px rgba(28, 33, 60, .18);--maxw: 1080px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:84px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}.top-nav{background:#ffffffe0;-webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}.nav-container{max-width:var(--maxw);margin:0 auto;padding:14px 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