/* 阅读进度条样式 */
#reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  z-index: 9999;
  background: linear-gradient(
    90deg,
    #ff6b6b,
    #ee5a52,
    #ffa07a,
    #ffd700,
    #98fb98,
    #20b2aa,
    #87ceeb,
    #4682b4,
    #9370db,
    #ba55d3,
    #ff69b4,
    #ff1493
  );
  background-size: 200% 100%;
  animation: gradient-shift 3s ease infinite;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  transition: width 0.1s ease-out;
}

/* 彩色渐变动画 */
@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* 暗色模式下的调整 */
[data-theme='dark'] #reading-progress-bar {
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.2);
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
  #reading-progress-bar {
    height: 2px;
  }
}