body {
  margin: 0;
  /* 设置默认背景色，避免白屏 */
  background-color: var(--initial-loader-bg, #F5F7FA);
  transition: background-color 0.3s ease;
}

html {
  overflow-x: hidden;
  overflow-y: scroll;
}

#loading-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--initial-loader-bg, #F5F7FA);
  block-size: 100vh;
  gap: 1rem 0;
  inline-size: 100vw;
  z-index: 9999;
  /* 添加平滑过渡 */
  transition: opacity 0.3s ease-out;
}

.loading {
  position: relative;
  box-sizing: border-box;
  border: 3px solid transparent;
  border-radius: 50%;
  block-size: 55px;
  inline-size: 55px;
}

.loading .effect-1,
.loading .effect-2,
.loading .effect-3 {
  position: absolute;
  box-sizing: border-box;
  border: 3px solid transparent;
  border-radius: 50%;
  block-size: 100%;
  border-inline-start: 3px solid var(--initial-loader-color, #eee);
  inline-size: 100%;
}

.loading .effect-1 {
  animation: rotate 1s ease infinite;
}

.loading .effect-2 {
  animation: rotate-opacity 1s ease infinite 0.1s;
}

.loading .effect-3 {
  animation: rotate-opacity 1s ease infinite 0.2s;
}

.loading .effects {
  transition: all 0.3s ease;
}

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(1turn);
  }
}

@keyframes rotate-opacity {
  0% {
    opacity: 0.1;
    transform: rotate(0deg);
  }

  100% {
    opacity: 1;
    transform: rotate(1turn);
  }
}