:root{--bg:#0f0f10;--card:#161616;--border:#2a2a2a;--text:#ffffff;--muted:#c9c9c9;--danger:#ff5a6a;--ok:#60e6b3;--shadow: 0 10px 30px rgba(0,0,0,.45);--radius: 16px;--font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans TC", Arial, "Apple Color Emoji","Segoe UI Emoji"}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font)}a{color:inherit}button,input{font-family:inherit}hr{border:0;border-top:1px solid var(--border);opacity:.8}.container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{width:min(520px,92vw);background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}.h1{font-size:20px;margin:0 0 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