.roll-bar {
  top: 4rem;
  left: .6rem;
  position: fixed;
  z-index: 999;
  background: #2b2b2b;
  opacity: 0.8;
  font-size: 14px;
  padding: .3rem;
  border-radius: 5px;
  animation: slowlyShow 1s;
  -webkit-animation: slowlyShow 1s;
}
.roll-text {
  color: #ffffff;
  line-height: 24px;
}
.roll-text > img {
  display: block;
  float: left;
  border-radius: 50%;
  width: 25px;
  height: 25px;
  margin-right: .3rem;
}
@keyframes slowlyShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.8;
  }
}
@-webkit-keyframes slowlyShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.8;
  }
}