.progress-bar {
text-align:left;
  width: 10%;
  background-color: #eee;
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-filler {
text-align:left;
  height: 2px;
  background-color: #4CAF50; /* 绿色 */
  border-radius: 2px 0 0 5px;
  transition: width 0.4s ease-in-out;
}