布局-三列布局（定宽+自适应+定宽）

 1 <div class="parent">
 2         <div class="left"><p>left</p></div>
 3         <div class="center-fix">
 4             <div class="center">
 5                 <p>center</p>
 6                 <p>center</p>
 7             </div>
 8         </div>
 9         <div class="right"><p>right</p></div>
10     </div>

 1 p {margin:0;}
 2     .parent {
 3         background-color: grey;
 4         width: 600px;
 5 
 6         overflow: hidden;
 7     }
 8     .right,.left {
 9         position: relative;
10         float: left;
11         width: 100px;
12     }
13     .center-fix {
14         float: left;
15         width: 100%;
16         margin: 0 -100px;
17     }
18     .center {
19         margin: 0 110px;
20          background-color: greenyellow;
21      }
22      .right {
23          background-color: skyblue;
24      }
25      .left {
26          background-color: indianred;
27      }

 1 <div class="parent">
 2         <div class="left"><p>left</p></div>
 3         <div class="center-fix">
 4             <div class="center">
 5                 <p>center</p>
 6                 <p>center</p>
 7             </div>
 8         </div>
 9         <div class="right"><p>right</p></div>
10     </div>

 1 p {margin:0;}
 2     .parent {
 3         background-color: grey;
 4         width: 600px;
 5         font-size: 0;/*去掉inline-block元素之间天然的空隙*/
 6     }
 7     .right,.left,.center-fix {
 8         display: inline-block;
 9         font-size: 16px;
10         vertical-align: top;/*文本定位在顶部*/
11     }
12     .right,.left {
13         width: 100px;
14         position: relative;
15     }
16     .center-fix {
17         width: 100%;
18         margin: 0 -100px;
19     }
20     .center {
21         margin: 0 110px;
22          background-color: greenyellow;
23      }
24      .right {
25          background-color: skyblue;
26      }
27      .left {
28          background-color: indianred;
29      }

1 <div class="parent">
2         <div class="left"><p>left</p></div>
3         <div class="center">
4             <p>center</p>
5             <p>center</p>
6         </div>
7         <div class="right"><p>right</p></div>
8     </div>

 1 p {margin:0;}
 2     .parent {
 3         background-color: grey;
 4         width: 600px;
 5         
 6         display: table;
 7         table-layout: fixed;
 8     }
 9     .right,.left {
10         width: 100px;
11         display: table-cell;
12     }
13     .center {
14         display: table-cell;/*没有margin属性*/
15         border-left: 10px solid transparent;
16         border-right: 10px solid transparent;
17         background-origin: padding-box;/*指定背景图片从哪个区域绘制*/
18         background-clip: padding-box;/*背景图片显示的区域定位*/
19 
20          background-color: greenyellow;
21      }
22      .right {
23          background-color: skyblue;
24      }
25      .left {
26          background-color: indianred;
27      }

1 <div class="parent">
2         <div class="left"><p>left</p></div>
3         <div class="center">
4             <p>center</p>
5             <p>center</p>
6         </div>
7         <div class="right"><p>right</p></div>
8     </div>

 1 p {margin:0;}
 2     .parent {
 3         background-color: grey;
 4         width: 600px;
 5         height: 36px;/*position:absolute的元素是脱离文档流的*/
 6         
 7         position: relative;
 8     }
 9     .right,.left,.center {
10         position: absolute;
11     }
12     .center {
13         left: 110px;
14         right: 110px;
15          background-color: greenyellow;
16      }
17      .right {
18          right: 0;
19          width: 100px;
20          background-color: skyblue;
21      }
22      .left {
23          left: 0;
24          width: 100px;
25          background-color: indianred;
26      }

1 <div class="parent">
2         <div class="left"><p>left</p></div>
3         <div class="center">
4             <p>center</p>
5             <p>center</p>
6         </div>
7         <div class="right"><p>right</p></div>
8     </div>

 1 p {margin:0;}
 2     .parent {
 3         background-color: grey;
 4         width: 600px;
 5 
 6         display: flex;
 7     }
 8     .right,.left {
 9         width: 100px;
10     }
11     .center {
12         flex: 1;/*center获得所有的剩余部分*/
13         margin: 0 10px;
14          background-color: greenyellow;
15      }
16      .right {
17          background-color: skyblue;
18      }
19      .left {
20          background-color: indianred;
21      }