:root{--navy:#0b1f3a;--navy2:#102b4e;--blue:#2563eb;--blue2:#1d4ed8;--cyan:#0891b2;--ink:#172033;--muted:#667085;--line:#dfe5ee;--bg:#f3f6fa;--white:#fff;--red:#b42318;--shadow:0 10px 30px rgba(15,35,65,.07);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-width:1100px;background:var(--bg)}button,input,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}.login-shell{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 65% 20%,#173c69 0,transparent 34%),linear-gradient(135deg,#07172c,#102b4e)}.login-card{width:420px;padding:42px;border-radius:18px;background:#fff;box-shadow:0 30px 80px rgba(0,0,0,.28)}.brand-mark{width:52px;height:52px;display:grid;place-items:center;border-radius:14px;background:var(--blue);color:#fff;font-size:24px;font-weight:800;box-shadow:0 8px 20px 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p{color:var(--muted);line-height:1.65}.tool-card .button{margin-top:auto}.tool-icon{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;color:#fff;font-size:25px}.tool-icon.blue{background:var(--blue)}.tool-icon.cyan{background:var(--cyan)}.tag{margin:20px 0 5px}.notice{display:flex;gap:12px;margin-top:24px;padding:18px 20px;border:1px solid #bfdbfe;border-radius:12px;background:#eff6ff;color:#345}.notice>span{color:var(--blue);font-size:20px}.notice p{margin:0;line-height:1.55;font-size:13px}.surface{padding:24px;margin-bottom:20px}.upload-surface{display:grid;grid-template-columns:1fr auto;align-items:center;gap:16px}.upload-surface p{margin:8px 0 0;color:var(--muted)}.file-picker{grid-column:2;grid-row:1;display:inline-grid;place-items:center;height:42px;padding:0 18px;border-radius:9px;background:#eef4ff;color:var(--blue);font-weight:750;cursor:pointer}.file-picker 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