* {
  box-sizing: border-box;
}

html { /* 将纯黑色背景设置到html元素 */
  height: 100%;
  margin: 0;
  background-color: #000000; /* 纯黑色 */
}

body { /* body保持透明，覆盖html */
  height: 100%;
  margin: 0;
  /* 确保这里没有设置背景颜色，以便html的黑色背景能够透过 */
}


.bg {
  background: url("./images/h5/bg.png") center / 100% 100% no-repeat;
  height: 100%;
  width: 100%;
  position: fixed;
  z-index: 0; /* 将z-index改为0，确保图片在黑色背景之上 */
}

.content {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  position: fixed;
}



.loading_bar {
  width: 5.69rem;
  height: 1.41rem;
  content: url(./images/loading_bar.gif);
}

@media only screen and (min-width: 992px) {
  .bg {
    background: url("./images/web/bg.png") center / 100% 100% no-repeat;
    z-index: 0; /* 媒体查询中也保持z-index为0 */
  }

  .content {
    padding: 30px;
    align-items: center;
    justify-content: flex-start;
    gap: 20px;
  }

  .loading_bar {
    width: 700px;
    height: 273px;
  }
}