:root{--ink:#122337;--muted:#607083;--blue:#145bff;--cyan:#4ee1ff;--ice:#eef7ff;--line:#dbe5ef;--white:#fff;--radius:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:'Noto Sans JP',sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.header{height:82px;display:flex;align-items:center;padding:0 5vw;border-bottom:1px solid rgba(20,40,70,.08);position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);z-index:20}.brand{display:flex;align-items:center;gap:11px;font:800 17px/1 'Outfit',sans-serif;letter-spacing:.06em}.brand small{display:block;margin-top:5px;font-size:8px;letter-spacing:.28em;color:#8391a1}.brand-mark{display:grid;place-items:center;width:37px;height:37px;background:var(--blue);color:#fff;border-radius:10px;font:800 23px/1 sans-serif}.header 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