:root{--bg:#f5f7fb;--card:#fff;--text:#111827;--muted:#6b7280;--border:#e5e7eb;--primary:#1677ff;--primary-hover:#0958d9;--danger:#ef4444;--success:#16a34a;--warning:#f59e0b;--shadow:0 6px 18px #1118270f;--radius:12px;--radius-sm:10px;--sans:system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;font:14px/1.5 var(--sans);color:var(--text);background:var(--bg);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background:var(--bg);margin:0}#root{width:100%;min-height:100vh}h1,h2,h3,h4{color:var(--text);margin:0}h2{font-size:20px;font-weight:700}h3{font-size:16px;font-weight:700}h4{font-size:14px;font-weight:700}button{appearance:none;border:1px solid var(--border);color:var(--text);cursor:pointer;background:#fff;border-radius:10px;padding:8px 12px;transition:all .15s}button:hover{border-color:#cfd5df;box-shadow:0 2px 10px #1118270f}button:disabled{opacity:.55;cursor:not-allowed;box-shadow:none}button.primary{background:var(--primary);border-color:var(--primary);color:#fff}button.primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}button.danger{background:var(--danger);border-color:var(--danger);color:#fff}input,select,textarea{border:1px solid var(--border);font:inherit;color:var(--text);background:#fff;border-radius:10px;outline:none;padding:8px 10px}input:focus,select:focus,textarea:focus{border-color:#1677ffa6;box-shadow:0 0 0 3px #1677ff26}table{border-collapse:collapse;background:#fff;width:100%}thead tr{background:#f3f4f6}th,td{border-top:1px solid #f0f2f5}.oc-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.oc-muted{color:var(--muted)}