skewX(<angle>);表示只在X轴(水平方向)倾斜。 skewY(<angle>);表示只在Y轴(垂直方向)倾斜。 - 在线编辑器

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    div {
      width: 100px;
      height: 75px;
      background-color: red;
      border: 1px solid black;
    }

    div#div2 {
      transform: skew(30deg, 20deg);
      -ms-transform: skew(30deg, 20deg);
      /* IE 9 */
      -webkit-transform: skew(30deg, 20deg);
      /* Safari and Chrome */
    }
  </style>
</head>
<body>

  <div>Hello. This is a DIV element.</div>

  <div id="div2">Hello. This is a DIV element.</div>

</body>
</html>
​x
 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    div {
      width: 100px;
      height: 75px;
      background-color: red;
      border: 1px solid black;
    }
​
    div#div2 {
      transform: skew(30deg, 20deg);
      -ms-transform: skew(30deg, 20deg);
      /* IE 9 */
      -webkit-transform: skew(30deg, 20deg);
      /* Safari and Chrome */
    }
  </style>
</head>
<body>
​
  <div>Hello. This is a DIV element.</div>
​
  <div id="div2">Hello. This is a DIV element.</div>
​
</body>
</html>