CSS制作逼真的波浪效果

效果

代码示例

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <link rel="icon" href="/favicon.ico" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <meta name="keywords" content="keywords" />
  <meta name="description" content="description" />
  <title>%VITE_APP_TITLE%</title>
</head>
<body>
  <div id="app">
    <style>
      html,
      body {
        height: 100%;
        margin: 0;
        min-height: 100%;
      }

      .container {
        background: linear-gradient(60deg, rgba(84, 58, 183, 1) 0%, rgba(0, 172, 193, 1) 100%);
      }

      .content {
        height: 65vh;
        width: 100%;
        margin: 0;
        padding: 0;
      }

      .waves {
        position: relative;
        width: 100%;
        height: 15vh;
        margin-bottom: -7px;
        /* 修复 Safari 等浏览器下方空隙 */
        min-height: 100px;
        max-height: 150px;
      }

      /* 动画 */
      .parallax>use {
        animation: move-forever 25s cubic-bezier(0.55, 0.5, 0.45, 0.5) infinite;
      }

      .parallax>use:nth-child(1) {
        animation-delay: -2s;
        animation-duration: 7s;
      }

      .parallax>use:nth-child(2) {
        animation-delay: -3s;
        animation-duration: 10s;
      }

      .parallax>use:nth-child(3) {
        animation-delay: -4s;
        animation-duration: 13s;
      }

      .parallax>use:nth-child(4) {
        animation-delay: -5s;
        animation-duration: 20s;
      }

      @keyframes move-forever {
        0% {
          transform: translate3d(-90px, 0, 0);
        }

        100% {
          transform: translate3d(85px, 0, 0);
        }
      }
    </style>
    <div class="container">
      <div class="content"></div>
      <svg class="waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
        viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto">
        <defs>
          <path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z" />
        </defs>
        <g class="parallax">
          <use xlink:href="#gentle-wave" x="48" y="0" fill="rgba(255,255,255,0.7" />
          <use xlink:href="#gentle-wave" x="48" y="3" fill="rgba(255,255,255,0.5)" />
          <use xlink:href="#gentle-wave" x="48" y="5" fill="rgba(255,255,255,0.3)" />
          <use xlink:href="#gentle-wave" x="48" y="7" fill="#fff" />
        </g>
      </svg>
    </div>
  </div>
  <!-- <script type="module" src="/src/main.js"></script> -->
</body>
</html>