css 设置好看的背景效果（毛玻璃）

先设置一个容器DIV

<div class="card">div>

1. 设置一个好看的背景

.card {
  height: 100vh;
  background: radial-gradient(
      circle at 60% 90%,
      rgba(46, 103, 161, 1),
      transparent 60%
    ),
    radial-gradient(
      circle at 20px 20px,
      rgba(46, 103, 161, 0.8),
      transparent 25%
    ),
    #182336;
}

2. 设置一个盒子样式

.card {
  color: rgba(255, 255, 255, 0.8);
  position: absolute;
  left: 100px;
  top: 200px;
  z-index: 10;
  font-family: sans-serif;
  text-align: center;
  width: 300px;
  height: 500px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  border-left: 1px solid rgba(255, 255, 255, 0.4);
  background: linear-gradient(
    to top right,
    rgba(90, 149, 207, 0.5),
    rgba(58, 76, 99, 0.8)
  );
  box-shadow: 10px -10px 20px rgba(0, 0, 0, 0.2),
    -10px 10px 20px rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(6px); /*  元素后面区域添加模糊效果 */
  border-radius: 20px;
  // transform: rotate(-15deg);
}