:root{--ink:#172033;--muted:#64748b;--line:#dbe3ed;--accent:#7d1111}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 30% 0,#4b1010 0,transparent 28%),linear-gradient(145deg,#0b1220,#16101a);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink)}.auth-card{width:min(430px,calc(100% - 28px));background:#fff;border-radius:18px;padding:28px;box-shadow:0 28px 80px #0008}.mark{text-align:center}.mark img{max-width:285px;max-height:78px}.auth-card h1{text-align:center;margin:12px 0 0}.sub{text-align:center;color:var(--muted);font-size:13px;margin:6px 0 20px}label{display:grid;gap:6px;margin:12px 0;color:#475569;font-size:12px;font-weight:800}input{width:100%;border:1px solid var(--line);border-radius:9px;padding:11px 12px;font:inherit}.btn{width:100%;border:0;border-radius:10px;padding:12px;background:linear-gradient(#8b1c1c,#650808);color:#fff;font-weight:900;cursor:pointer}.msg{min-height:20px;color:#b91c1c;text-align:center;font-size:12px;margin-top:9px}.hint{margin-top:16px;padding:11px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:9px;color:#64748b;font-size:11px;line-height:1.5}