:root{--bg: #f2f3f5;--panel: #ffffff;--border: #e5e7eb;--border-strong: #d8dbe0;--text: #1f2937;--muted: #6b7280;--faint: #9ca3af;--primary: #12b3a6;--primary-dark: #0e968b;--primary-soft: rgba(18, 179, 166, .12);--danger: #ef5350;--warn: #e6a23c;--radius: 6px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .1)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;font-size:13px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.main{flex:1;display:flex;min-height:0}.topbar{background:var(--panel);border-bottom:1px solid var(--border);flex:0 0 auto}.topbar-row{display:flex;align-items:center;gap:12px;padding:8px 16px}.topbar-row.sub{padding:0 16px 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