:root{--bg:#0b0c0e;--paper:#15171a;--ink:#f5f6f7;--muted:#9ca1a8;--line:#34383f;--signal:#ffd400;--shadow:0 28px 80px rgba(0,0,0,.38)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 50% -15%,#25282c 0,#111315 38%,#0b0c0e 76%);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:12.8px}.gate{min-height:100svh;display:grid;place-items:center;padding:24px}.gate-card{width:min(520px,100%);background:linear-gradient(180deg,#191c20,#121417);border:1px solid var(--line);border-radius:30px;padding:34px 28px;box-shadow:var(--shadow)}.brand{font-weight:800;margin-bottom:52px}.eyebrow{font-size:8.8px;font-weight:850;letter-spacing:.16em;color:var(--signal)}h1{font-size:clamp(27.2px,6.4vw,43.2px);line-height:1.04;letter-spacing:-.045em;margin:12px 0 14px}.gate-card>p{margin:0;color:var(--muted);line-height:1.65}form{margin-top:30px}label{display:block;font-size:9.6px;font-weight:760;margin-bottom:8px}input{width:100%;border:1px solid #3b4047;border-radius:16px;background:#0f1113;color:#fff;padding:16px;font:inherit;font-size:16px;letter-spacing:.18em;outline:none}input:focus{border-color:var(--signal);box-shadow:0 0 0 3px rgba(255,212,0,.10)}button{width:100%;border:1px solid var(--signal);border-radius:16px;padding:15px 18px;margin-top:12px;background:var(--signal);color:#080808;font:inherit;font-weight:850;cursor:pointer}button:disabled{opacity:.65;cursor:wait}.error{min-height:22px;margin-top:10px;color:#ff8278;font-size:10.4px}@media(max-width:520px){.gate{padding:14px}.gate-card{border-radius:24px;padding:28px 20px}.brand{margin-bottom:38px}}