:root{--bg:#070b16;--panel:#10182a;--panel2:#17213a;--ink:#f4f1e8;--muted:#9ca9c5;--gold:#f7c95c;--cyan:#52e0d0;--red:#f16d7a;--line:#2a3756;--font:'Microsoft JhengHei','PingFang TC',sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 70% 0,#18284a 0,transparent 34%),var(--bg);color:var(--ink);font:16px/1.75 var(--font)}a{color:var(--cyan);text-underline-offset:4px}button,select,textarea{font:inherit;color:inherit}.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:18px;padding:16px 4%;background:#080d19ec;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}#brand{margin-right:auto;color:var(--gold);font:bold 18px Consolas,monospace;letter-spacing:.12em;text-decoration:none}.topbar nav{display:flex;gap:18px}.topbar label{font-size:12px;color:var(--muted)}button,select{border:1px solid var(--line);border-radius:8px;background:var(--panel2);padding:8px 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