三、CSS样式—

三、CSS样式——表格

1、CSS表格

　　CSS表格属性可以帮助我们极大的改善表格的外观

2、表格边框

3、折叠边框

4、表格宽高

5、表格文本对齐

6、表格内边距

7、表格颜色

 1 <!--index.html-->
 2 <!DOCTYPE html>
 3 <html lang="en">
 4 <head>
 5     <meta charset="UTF-8">
 6     <title>Title</title>
 7     <link rel="stylesheet" type="text/css" href="style.css">
 8 </head>
 9 <body>
10     <table id="tb">
11         <tr>
12             <th>姓名</th>
13             <th>年龄</th>
14             <th>性别</th>
15         </tr>
16         <tr>
17             <td>小王</td>
18             <td>02</td>
19             <td>男</td>
20         </tr>
21         <tr>
22             <td>小王</td>
23             <td>02</td>
24             <td>男</td>
25         </tr>
26         <tr>
27             <td>小王</td>
28             <td>02</td>
29             <td>男</td>
30         </tr>
31     </table>
32 </body>
33 </html>

 1 /*style.css*/
 2 #tb,tr,th,td{
 3     border: 1px solid blueviolet;
 4     text-align: center;
 5     background-color: red;
 6 }
 7 
 8 #tb{
 9     width: 400px;
10     height: 400px;
11     border-collapse: collapse;
12     /*!*将两条边框合并成一条边框*!*/
13 }

 1 <!--index.html-->
 2 <!DOCTYPE html>
 3 <html lang="en">
 4 <head>
 5     <meta charset="UTF-8">
 6     <title>Title</title>
 7     <link rel="stylesheet" type="text/css" href="style.css">
 8 </head>
 9 <body>
10     <table id="tb">
11         <tr>
12             <th>姓名</th>
13             <th>年龄</th>
14             <th>性别</th>
15         </tr>
16         <tr class="alt">
17             <td>小王</td>
18             <td>02</td>
19             <td>男</td>
20         </tr>
21         <tr>
22             <td>小王</td>
23             <td>02</td>
24             <td>男</td>
25         </tr>
26         <tr class="alt">
27             <td>小王</td>
28             <td>02</td>
29             <td>男</td>
30         </tr>
31     </table>
32 </body>
33 </html>

 1 #tb{
 2     border-collapse: collapse;
 3     width: 500px;
 4 }
 5 #tb td,#tb th{
 6     border: 1px solid darkolivegreen;
 7     padding: 5px;
 8 }
 9 
10 #tb th{
11     text-align: left;
12     background-color: blueviolet;
13     color: white;
14 }
15 
16 #tb tr.alt td{
17     color: black;
18     background-color: aqua;
19 }