1.float+margin

<div class="wrapper">
    <div class="left"></div>
    <div class="right"></div>
    <div class="center"></div>
</div>

.left {
    float: left;
    width: 300px;
    height: 400px;
    background-color: limegreen;
 
}
 
.right {
    float: right;
    width: 200px;
    height: 400px;
    background-color: yellowgreen;
}
 
.center {
    height: 400px;
    margin: 0 200px 0 300px;
    background-color: tomato;
}
 

2.flex

<div class="wrapper">
    <div class="left"></div>
    <div class="center"></div>
    <div class="right"></div>
</div>

div {
  display: flex;
}
.left{
  width: 100px;
  height: 100px;
  border: 1px solid #55FFFF;
}
.center{
  flex: 1;
  border: 1px solid #55FFFF;
}
.right{
  width: 100px;
  height: 100px;
  border: 1px solid #55FFFF;
} 
 

3.position

<div class="wrapper">
    <div class="left"></div>
    <div class="center"></div>
    <div class="right"></div>
</div>

.wrapper {
    position: relative;
}
 
.left {
    position: absolute;
    left: 0;
    top: 0;
    width: 300px;
    height: 500px;
    background-color: lightgreen;
}
 
.right {
    position: absolute;
    right: 0;
    top: 0;
    width: 200px;
    height: 500px;
    background-color: lightskyblue;
}
 
.center {
    height: 500px;
    margin: 0 200px 0 300px;
    background-color: tomato;
}
 

4.grid

<div class="wrapper">
    <div class="left"></div>
    <div class="center"></div>
    <div class="right"></div>
</div>

.wrapper {
  display: grid;
  grid-template-columns: 100px auto 100px;
  grid-column-gap: 10px;
}

5.雙飛翼佈局

<div class="wrapper">
  <div class="center-wrapper">
    <div class="center">所有人都在努力，並不是只有你滿腹委屈</div>
  </div>
  <div class="left">只要在變好，慢一點也無妨</div>
  <div class="right">如果你真的不在乎，又怎麼會有那麼多情緒</div>
</div>

*{
  margin: 0;
  padding: 0;
}
.wrapper{
  height: 100px;
}
.center-wrapper,
  .left,
  .right{
  float: left;
  height: 100px;
}
.center-wrapper{
  width: 100%;
  background-color: #32CD32;
}
.left{
  width: 100px;
  margin-left: -100%;
  background-color: #55FFFF;
}
.right{
  width: 100px;
  margin-left: -100px;
  background-color: #800080;
}
.center {
  margin-left: 100px;
  margin-right: 100px;
  height: 500px;
}

6.聖盃佈局

<div class="wrapper">
    <div class="center"></div>
    <div class="left"></div>
    <div class="right"></div>
</div>

.wrapper {
    height: 500px;
    padding: 0 200px 0 300px; /* wrapper的container兩側空出來left和right的寬度 */
}
 
.center, .left, .right {
    position: relative;
    float: left;
}
 
.center {
    width: 100%; /* 寬度＝wrapper的container的寬度，兩側已空出left和right */
    height: 500px;
    background-color: tomato;
}
 
.left {
    width: 300px;
    height: 500px;
    margin-left: -100%; /* 左側緊鄰container左側 */
    left: -300px; /* 移至左側緊鄰wrapper最左側，右側緊鄰container左側 */
    background-color: lightgreen;
}
 
.right {
    width: 200px;
    height: 500px;
    margin-left: -200px; /* 右側緊鄰container右側 */
    right: -200px; /* 移至右側緊鄰wrapper最右側 */
    background-color: lightskyblue;
}