:root{--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #ede9fe;--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #1e293b;--text-muted: #64748b;--danger: #ef4444;--danger-hover: #dc2626;--success: #22c55e;--warn: #f59e0b;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}button{cursor:pointer;border:none;border-radius:var(--radius);padding:6px 14px;font-size:13px;font-family:inherit;transition:background .15s,opacity .15s}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:var(--danger-hover)}.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg)}input,textarea,select{font-family:inherit;font-size:13px;border:1px solid var(--border);border-radius:var(--radius);padding:7px 10px;outline:none;transition:border-color .15s;background:var(--surface);color:var(--text);width:100%}input:focus,textarea:focus,select:focus{border-color:var(--primary)}.cite-ref{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:11px;font-weight:600;border-radius:4px;padding:0 4px;margin:0 1px;cursor:pointer;vertical-align:super;line-height:1.6}.cite-ref:hover{background:var(--primary);color:#fff}