'; html += '
'; html += '理论用量: ' + theory.toFixed(2) + '
损耗: ' + (loss*100).toFixed(0) + '%
建议购买: ' + real.toFixed(2); html += '
'; resultContent.innerHTML = html; resultMeta.textContent = real.toFixed(2); resultArea.classList.add('show'); }); document.getElementById('btn-clear').addEventListener('click', function() { form.reset(); clearError(); clearResult(); }); })();