��度模式 */
    .container {
      width: 100px;
      height: 100px;
      background: red;
      /* transition: 1s width 1s; */
 transition: width 1s, background 3s cubic-bezier(0.345, -0.600, 0.505, 1.650);



    }
    .container:hover {
      width: 800px;
      background: green;
    }
  </style>
</head>
<body>
  <div class="container"></div>

</body>
</html>
