:root{--bg:#f7f9fc;--card:#fff;--text:#1f2d3d;--muted:#6b7c93;--primary:#0078ff;--primary-hover:#005fd6;--border:#e6ebf2;--shadow:0 4px 14px rgba(0,0,0,0.05);--radius:12px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang SC","Hiragino Sans GB","Microsoft YaHei","WenQuanYi Micro Hei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.container{max-width:1000px;margin:40px auto;padding:0 20px}h1{text-align:center;margin-bottom:10px;font-size:28px;font-weight:700}.subtitle{text-align:center;color:var(--muted);margin-bottom:30px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);padding:16px}label{display:block;font-weight:600;margin-bottom:8px}input[type="text"],input[type="number"],input[type="datetime-local"],select{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;outline:none;font-size:14px;color:var(--text);background:#fbfcfe}textarea{width:100%;min-height:260px;resize:vertical;padding:12px;border:1px solid var(--border);border-radius:8px;outline:none;font-family:Consolas,Monaco,Menlo,"Courier New",monospace;font-size:14px;color:var(--text);background:#fbfcfe}input[type="text"]:focus,input[type="number"]:focus,input[type="datetime-local"]:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,120,255,0.15)}.row{display:flex;gap:12px;align-items:center;margin-top:10px;flex-wrap:wrap}.options{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}.option{display:flex;align-items:center;gap:6px}.flag{display:flex;align-items:center;gap:6px}.btn-row{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}button{cursor:pointer;border:none;border-radius:8px;padding:10px 14px;font-weight:600;transition:background .2s,transform .05s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{background:#f0f3f9;color:#3a4a5f}.btn-secondary:hover{background:#e7ecf5}.btn-danger{background:#ff5d5d;color:#fff}.btn-danger:hover{background:#ff3f3f}.status{margin-top:10px;color:var(--muted);font-size:12px}.footer{text-align:center;margin-top:30px;color:var(--muted);font-size:12px}@media (max-width:768px){.grid{grid-template-columns:1fr}}}