:root{--bg: #f7f4ec;--panel: rgba(255, 255, 255, .86);--panel-strong: #ffffff;--ink: #15212b;--muted: #5b6872;--line: rgba(21, 33, 43, .1);--brand: #0a5c63;--brand-strong: #063f44;--accent: #cb6b38;--success: #1d7a66;--warning: #b96d27;--danger: #c04a52;--shadow: 0 28px 60px rgba(16, 30, 40, .08);font-family:Avenir Next,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:radial-gradient(circle at top left,rgba(10,92,99,.18),transparent 28%),radial-gradient(circle at right top,rgba(203,107,56,.12),transparent 24%),linear-gradient(180deg,#fcfaf4,#eef2ea)}button,textarea,select{font:inherit}button{cursor:pointer}.security-demo-shell{min-height:100vh;padding:20px;display:grid;gap:16px}.hero,.panel{border:1px solid var(--line);border-radius:24px;background:var(--panel);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:var(--shadow)}.hero{padding:20px 22px;display:grid;grid-template-columns:minmax(0,1.35fr) 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