'; html += '
'; html += '分辨率: ' + w + ' × ' + h + '
对角线: ' + d + ' 英寸
'; var level = ppi < 200 ? '普通' : (ppi < 300 ? '视网膜' : (ppi < 500 ? '视网膜高清' : '4K/8K 屏')); html += '等级: ' + level; html += '
'; resultContent.innerHTML = html; resultMeta.textContent = ppi.toFixed(1) + ' PPI (' + level + ')'; resultArea.classList.add('show'); }); document.getElementById('btn-clear').addEventListener('click', function() { document.getElementById('w').value = 1920; document.getElementById('h').value = 1080; document.getElementById('d').value = 15.6; clearError(); clearResult(); }); })();