:root{--paper:#f6f3eb;--ivory:#fffdf8;--ink:#18211f;--blue:#123fa6;--green:#53754d;--pale:#e9eee3;--line:#c9cec5;--soft:#69716c;--danger:#a24631}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#e8e6df;color:var(--ink);font-family:Arial,sans-serif}button,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}.labTopbar{width:min(100%,1600px);height:76px;margin:0 auto;padding:0 42px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:rgba(246,243,235,.97)}.labBrand{display:flex;align-items:center;color:var(--blue);font-weight:900;letter-spacing:.14em}.labBrand b{display:grid;place-items:center;width:31px;height:31px;margin-right:10px;color:#fff;background:var(--blue)}.labTopbar nav{display:flex;gap:28px;font:11px monospace;text-transform:uppercase;letter-spacing:.08em}.labTopbar nav a{padding:8px 0}.labTopbar nav .active{color:var(--blue);border-bottom:2px solid 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