:root{--ink:#10223d;--muted:#5f6e84;--paper:#f7f9fd;--line:#dce4ef;--navy:#132a4d;--blue:#315de9;--cyan:#5ed6dc;--pink:#f39aca;--shadow:0 18px 48px rgba(19,42,77,0.1)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:Arial,Helvetica Neue,Helvetica,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button:disabled{cursor:not-allowed;opacity:.55}.shell{width:min(1120px,calc(100% - 40px));margin:0 auto}.site-header{position:sticky;z-index:10;top:0;border-bottom:1px solid rgba(220,228,239,.88);background:rgba(247,249,253,.88);backdrop-filter:blur(18px)}.header-inner{display:flex;align-items:center;gap:28px;min-height:72px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--navy);font-size:1.15rem;font-weight:800;letter-spacing:-.04em;white-space:nowrap}.brand-mark{display:grid;width:29px;height:29px;place-items:center;border-radius:10px 10px 2px 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