css设置背景图片居中

div {
  background-image: url('path/to/image.jpg');
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover; /* 或者 contain */
}

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh; /* 视口高度 */
}

.container::before {
  content: '';
  background-image: url('path/to/image.jpg');
  background-size: cover;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.container {
  display: grid;
  place-items: center;
  height: 100vh; /* 视口高度 */
}

.container::before {
  content: '';
  background-image: url('path/to/image.jpg');
  background-size: cover;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}