'; html += '
'; html += '尺寸: ' + l + ' × ' + w + ' × ' + t + ' mm
'; html += '体积: ' + (l*w*t/1e9).toFixed(6) + ' m³
'; html += '密度: 7.93 g/cm³ (304 不锈钢)'; html += '
'; resultContent.innerHTML = html; resultMeta.textContent = mass.toFixed(3) + ' kg'; resultArea.classList.add('show'); }); document.getElementById('btn-clear').addEventListener('click', function() { form.reset(); document.getElementById('l').value = 1000; document.getElementById('w').value = 1000; document.getElementById('t').value = 1; clearError(); clearResult(); }); })();