:root{--bg:#f2f5fa;--surface:#fff;--surface-2:#f3f5f8;--border:#e0e5ec;--text:#17212e;--text-dim:#586579;--accent:var(--brand-blue);--accent-hover:var(--brand-blue-hover);--danger:#ef4444;--info:var(--brand-blue);--warn:#f59e0b}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);-webkit-user-select:none;user-select:none;margin:0;font-family:Inter,Segoe UI,system-ui,sans-serif;font-size:15px}.net-banner{text-align:center;padding:8px 20px;font-size:13px;font-weight:600}.net-online{color:#17613e;background:#edf7f1}.net-offline{color:#8a4908;background:#fff4e5}.login-wrap{background:var(--bg);place-items:center;min-height:100vh;padding:20px;display:grid}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;width:min(420px,100%);padding:36px}.login-card h1{margin:0;font-size:24px}.login-card .sub{color:var(--text-dim);margin-bottom:26px}.login-card 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