.progress-wrap {
  position: fixed;
  right: 2rem;
  bottom: 2rem;
  width: 60px;
  height: 60px;
  background-color: #6a0dad;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.2);
  z-index: 9999;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all 0.3s ease;
}

.progress-wrap.active-progress {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.progress-wrap .back-arrow {
  position: absolute;
  font-size: 1.8rem;
  font-weight: bold;
  color: white;
  z-index: 2;
  pointer-events: none;
}

.progress-wrap:hover {
  background-color: #4b0082;
}

/* 圆环样式 */
.progress-wrap svg.progress-circle circle {
  fill: none;
  stroke:#ffffff;
  stroke-width: 4;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.3s ease;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
}

/* Hanming修改：回到顶部按钮样式 */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: none;
  width: 3rem;
  height: 3rem;
  font-size: 1.5rem;
  background-color: #6a0dad;
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
  -webkit-transition: opacity 0.3s ease;
  transition: opacity 0.3s ease;
}

#back-to-top:hover {
  background-color: #4b0082;
}