:root{--navy: #1b2a4a;--navy-2: #25395f;--amber: #c9a227;--amber-2: #e0b94a;--bg: #f5f6f8;--ink: #222831;--muted: #5b6472;--line: #e6e8ee;--card: #ffffff;--radius: 14px;--shadow: 0 8px 30px rgba(27, 42, 74, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Noto Sans JP,-apple-system,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;color:var(--ink);background:var(--bg);line-height:1.85;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{font-family:Zen Kaku Gothic New,Noto Sans JP,sans-serif;line-height:1.4}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1080px,calc(100% - 40px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}.logo{display:flex;align-items:center;gap:12px}.logo-mark{position:relative;display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:linear-gradient(140deg,var(--navy),var(--navy-2));color:#fff;font-family:Zen Kaku Gothic New;font-weight:900;font-size:22px;box-shadow:var(--shadow)}.logo-mark.small{width:34px;height:34px;font-size:18px;border-radius:9px}.logo-mark .dot{position:absolute;right:6px;bottom:7px;width:7px;height:7px;border-radius:50%;background:var(--amber-2)}.logo-text{display:flex;flex-direction:column;line-height:1.15}.logo-text strong{font-family:Zen Kaku Gothic New;font-size:19px;color:var(--navy);letter-spacing:.02em}.logo-text small{font-size:11px;color:var(--muted);letter-spacing:.04em}.nav{display:flex;align-items:center;gap:26px}.nav a{font-size:14px;font-weight:500;color:#33405a}.nav a:hover{color:var(--amber)}.nav .nav-cta{padding:8px 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