.wrapper {
  width: 100%;
  display: block;
  float: left;
  margin-top: 50px;
  position: relative;
}
.sider-banner {
  margin: 0 auto;
  height: 50px;
  background-color: #fff;
  position: relative;
}
.sider-banner .banner-block {
  width: 30px;
  height: 50px;
  margin-left: 1px;
  margin-right: 1px;
  background-color: #041838;
  display: block;
  float: left;
  position: relative;
  border-radius: 4px;
  overflow: hidden;
}
.sider-banner .banner-block .main-block {
  width: 100%;
  height: 50px;
}
.sider-banner .banner-block .letter-slider {
  position: absolute;
  top: 0px;
  left: 0;
  width: 100%;
  height: auto;
  display: block;
}
.sider-banner .banner-block .letter-slider span {
  display: block;
  float: left;
  width: 100%;
  height: 50px;
  margin-top: 7px;
  background-color: transparent;
  text-align: center;
  font-family: tt-r;
  font-size: 19px;
  color: #fff;
  font-weight: bold;
  text-transform: uppercase;
  line-height: 50px;
  background-color: #092a5e;
  border-radius: 4px;
}
.sider-banner .banner-block .letter-slider span:first-child {
  margin-top: 0px;
}
.sider-banner .banner-block::before {
  content: '';
  position: absolute;
  top: 22px;
  left: 2px ;
  width: 1px;
  height: 5px;
  background-color: #8495af;
  display: block;
  z-index: 2000;
}
.sider-banner .banner-block::after {
  content: '';
  position: absolute;
  top: 22px;
  right: 2px ;
  width: 1px;
  height: 5px;
  background-color: #8495af;
  display: block;
  z-index: 2000;
}
.sider-banner .banner-block.down::before {
  -webkit-animation: downmovebd 2s;
  animation: downmovebd 2s;
}
@-webkit-keyframes downmovebd {
  0% {
    top: 22px;
  }
  50% {
    top: 19px;
  }
  100% {
    top: 22px;
  }
}
.sider-banner .banner-block.down::after {
  -webkit-animation: upmovead 2s;
  animation: upmovead 2s;
}
@-webkit-keyframes upmovead {
  0% {
    top: 22px;
  }
  50% {
    top: 25px;
  }
  100% {
    top: 22px;
  }
}
.sider-banner .banner-block.up::after {
  -webkit-animation: upmoveau 2s;
  animation: upmoveau 2s;
}
@-webkit-keyframes upmoveau {
  0% {
    top: 22px;
  }
  50% {
    top: 25px;
  }
  100% {
    top: 22px;
  }
}
.sider-banner .banner-block.up::before {
  -webkit-animation: downmovebu 2s;
  animation: downmovebu 2s;
}
@-webkit-keyframes downmovebu {
  0% {
    top: 22px;
  }
  50% {
    top: 19px;
  }
  100% {
    top: 22px;
  }
}
.sider-banner:after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 25px;
  background-color: rgba(255, 255, 255, 0.1);
}