*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f0f2f5;--bg-card: #ffffff;--bg-sidebar: #1e1e2e;--bg-input: #f5f7fa;--border: #e4e7ed;--text: #303133;--text-secondary: #909399;--text-light: #c0c4cc;--primary: #409eff;--primary-hover: #337ecc;--success: #67c23a;--warning: #e6a23c;--error: #f56c6c;--info: #909399;--font-mono: "Cascadia Code", "Fira Code", "JetBrains Mono", "Consolas", monospace;--radius: 6px;--radius-lg: 10px;--shadow: 0 1px 3px rgba(0, 0, 0, .08);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1)}html,body,#app{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;color:var(--text);background:var(--bg)}.app{display:flex;flex-direction:column;height:100vh}.header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:56px;background:var(--bg-card);border-bottom:1px solid var(--border);flex-shrink:0}.header 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