.flip-digit-container {
  position: relative;
  border-radius: 4px;
  background-color: #1a1a1a;
  overflow: hidden;
  perspective: 1000px;
}

.flip-digit-bg-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background-color: #1a1a1a;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  z-index: 0;
}

.flip-digit-bg-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #1a1a1a;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
  z-index: 0;
}

.flip-digit-text {
  font-family: 'DSEG7', 'Courier New', monospace;
  color: #f0f0f0;
  text-align: center;
  line-height: 1;
}

.flip-digit-top-text {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
}

.flip-digit-bottom-text {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

.flip-digit-flip-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  background-color: #1a1a1a;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  backface-visibility: hidden;
  z-index: 11;
  /* 旋转轴在底部边缘（卡片中线位置） */
  transform-origin: center bottom;
}

.flip-digit-flip-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #1a1a1a;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
  backface-visibility: hidden;
  z-index: 10;
  /* 旋转轴在顶部边缘（卡片中线位置） */
  transform-origin: center top;
}

.flip-digit-center-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 20;
}