.exercise-item{
  background: #f9f9f9;
  padding: 10px 12px;
  box-shadow: 2px 1px 5px #aaaaaa;
  border-radius: 6px;
}
.title{
  font-weight: bold;
}
.left-time{
  font-size: 12px;
  color: gray;
}
.tip{
  font-size: 12px;
  border-radius: 36px;
  background: #00b0f0;
  color: white;
  padding: 2px 6px;
  margin-right: 6px;
  white-space: nowrap;
}
.commit-text{
  font-size: 12px;
  font-weight: bold;
  margin-left: 4px;
}