:root{--bg:#f5f7fb;--surface:#fff;--surface-soft:#f8fafc;--text:#172033;--muted:#6b7280;--line:#e3e8f0;--line-soft:#eef2f7;--primary:#2563eb;--primary-dark:#1d4ed8;--danger:#dc2626;--success:#15803d;--warning:#b45309;--sidebar:#111827;--sidebar-soft:#1f2937;--shadow:0 10px 24px rgba(17,24,39,.07)}*{box-sizing:border-box}html{min-width:320px}body,html{background:var(--bg)}body{margin:0;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}button,input,select,textarea{font:inherit}button{min-height:36px;border:0;border-radius:6px;background:var(--primary);color:#fff;cursor:pointer;font-size:13px;font-weight:800;transition:background .16s ease,border-color .16s ease,color .16s ease,box-shadow .16s ease}button:hover:not(:disabled){background:var(--primary-dark)}button:focus-visible,input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px 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