老人家對 CSS 不熟，也聽說時下表格的主流做法也是以 CSS 設計，但工作需要，只能急就章，日後再優化吧...
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style>
table {
width: 50%;
border-collapse: collapse;
margin: 20px auto;
font-family: Arial, sans-serif;
}
th, td {
border: 1px solid #ccc;
padding: 8px;
text-align: center;
position: relative; /* For positioning the diagonal line and text */
}
th {
background-color: #f2f2f2;
}
/* 確保對角線和文字不會超出單元格的範圍 */
.diagonal {
overflow: hidden; /* Hide anything outside the cell */
}
/* 左上右下對角線 */
.diagonal::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: linear-gradient(to top right, transparent 49.5%, #ccc 49.5%, #ccc 50.5%, transparent 50.5%);
/* 你也可以調整線條顏色和粗細 */
}
/* 左下半部的文字 */
.left-down {
position: absolute;
bottom: 5px; /* Adjust position */
left: 5px; /* Adjust position */
font-size: 0.9em;
color: #555;
z-index: 1; /* Ensure text is above the line */
}
/* 右上半部的文字 */
.right-up {
position: absolute;
top: 5px; /* Adjust position */
right: 5px; /* Adjust position */
font-size: 0.9em;
color: #555;
z-index: 1; /* Ensure text is above the line */
}
/* -------------------------------------------------------------------------- */
.reverse-diagonal {
overflow: hidden; /* 和 diagonal 相同，隱藏超出內容 */
position: relative; /* 和 diagonal 相同，用於內部定位 */
}
.reverse-diagonal::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background: linear-gradient(to bottom right, transparent 49.5%, #ccc 49.5%, #ccc 50.5%, transparent 50.5%);
/* 你也可以調整線條顏色和粗細 */
}
/* 左上半部的文字 */
.left-up {
position: absolute;
top: 5px; /* Adjust position */
left: 5px; /* Adjust position */
font-size: 0.9em;
color: #555;
z-index: 1; /* Ensure text is above the line */
}
/* 右下*/
.right-down {
position: absolute;
bottom: 5px; /* Adjust position */
right: 5px; /* Adjust position */
font-size: 0.9em;
color: #555;
z-index: 1; /* Ensure text is above the line */
}
</style>
</head>
<body>
<table>
<thead>
<tr>
<th class="diagonal">
<div class="right-up">右上半部的文字</div>
<div class="left-down">左下半部的文字</div>
</th>
<th>標題2</th>
<th>標題3</th>
</tr>
</thead>
<tbody>
<tr>
<td>資料A1</td>
<td>資料A2</td>
<td>資料A3</td>
</tr>
<tr>
<td>資料B1</td>
<td>資料B2</td>
<td>資料B3</td>
</tr>
</tbody>
</table>
<br />
<br />
<table>
<thead>
<tr>
<th class="reverse-diagonal">
<div class="left-up">左上半部的文字</div>
<div class="right-down">右下半部的文字</div>
</th>
<th>標題2</th>
<th>標題3</th>
</tr>
</thead>
<tbody>
<tr>
<td>資料A1</td>
<td>資料A2</td>
<td>資料A3</td>
</tr>
<tr>
<td>資料B1</td>
<td>資料B2</td>
<td>資料B3</td>
</tr>
</tbody>
</table>
</body>
</html>
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