:root{--bg:#fff;--bg-sidebar:#fbfbfc;--text:#1f2328;--text-secondary:#57606a;--text-muted:#8b949e;--border:#e5e7eb;--hover:#f3f4f6;--accent:#2563eb;--accent-soft:#dbeafe;--active-bg:#eff6ff;--blockquote-bg:#f6f8fa;--code-inline-bg:#f3f4f6;--table-header:#f9fafb;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;--font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{min-height:100vh}a{color:inherit;text-decoration:none}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#9ca3af}