:root{--bg: #f5f6fa;--card: #ffffff;--primary: #2c3e8f;--primary-light: #3b5998;--accent: #e67e22;--text: #2c3e50;--text-muted: #7f8c8d;--border: #dcdde1;--success: #27ae60;--warning: #f39c12;--danger: #e74c3c;--radius: 8px;--shadow: 0 2px 8px rgba(0,0,0,.08);--font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;--mono: "SF Mono", "Fira Code", "Consolas", monospace}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}#app{max-width:1200px;margin:0 auto;padding:20px}header{margin-bottom:24px}header h1{font-size:24px;font-weight:600;color:var(--primary);margin-bottom:16px}#toolbar{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;display:flex;flex-wrap:wrap;gap:12px;align-items:center;box-shadow:var(--shadow)}.form-group{display:flex;flex-direction:column;gap:2px}.form-group label{font-size:12px;color:var(--text-muted);font-weight:500}.form-group select,.form-group input{font-family:var(--font);font-size:14px;padding:6px 10px;border:1px solid var(--border);border-radius:4px;background:#fff;color:var(--text);min-width:80px}.form-group select:focus,.form-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #2c3e8f26}.btn{font-family:var(--font);font-size:14px;font-weight:500;padding:8px 20px;border:none;border-radius:4px;cursor:pointer;transition:all .15s ease;display:inline-flex;align-items:center;gap:6px}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-light)}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#219a52}.btn-danger{background:transparent;color:var(--danger);border:1px solid var(--danger);padding:4px 10px;font-size:12px}.btn-danger:hover{background:var(--danger);color:#fff}section{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px;box-shadow:var(--shadow)}.section-title{font-size:16px;font-weight:600;color:var(--primary);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--bg)}.calc-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}@media (max-width: 768px){.calc-layout{grid-template-columns:1fr}}.calc-inputs{display:grid;grid-template-columns:1fr 1fr;gap:12px}.calc-inputs .form-group{flex-direction:column}.calc-inputs .form-group input{width:100%}.calc-inputs .form-group .unit-label{font-size:12px;color:var(--text-muted);margin-top:-2px}.result-table{width:100%;border-collapse:collapse;font-size:14px}.result-table th,.result-table td{padding:10px 12px;text-align:center;border-bottom:1px solid var(--border)}.result-table th{background:var(--bg);font-weight:600;color:var(--text-muted);font-size:13px}.result-table .formula-hw{border-left:3px solid var(--primary)}.result-table .formula-dw{border-left:3px solid var(--accent)}.result-table .formula-cw{border-left:3px solid var(--success)}.result-table .value{font-family:var(--mono);font-weight:500}.result-table .na{color:var(--text-muted);font-family:var(--mono)}.chart-container{width:100%;height:300px;margin-top:16px}.params-summary{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:16px;padding:12px 16px;background:var(--bg);border-radius:4px;font-size:13px}.params-summary .param-item{display:flex;gap:4px}.params-summary .param-label{color:var(--text-muted)}.params-summary .param-value{font-family:var(--mono);font-weight:500}.warnings{margin-top:12px;padding:10px 14px;background:#fff8e1;border-left:3px solid var(--warning);border-radius:4px;font-size:13px;color:#856404}.batch-table-wrap{overflow-x:auto}.batch-table{width:100%;border-collapse:collapse;font-size:14px;min-width:500px}.batch-table th,.batch-table td{padding:8px 10px;text-align:center;border:1px solid var(--border);white-space:nowrap}.batch-table th{background:var(--bg);font-weight:600;font-size:13px}.batch-table input{width:100%;min-width:70px;padding:4px 6px;border:1px solid transparent;border-radius:2px;font-family:var(--font);font-size:14px;text-align:center;background:transparent}.batch-table input:focus{outline:none;border-color:var(--primary);background:#fff}.batch-actions{display:flex;gap:8px;margin-bottom:12px;align-items:center}