.tab-bar {
  border-top: 1px solid #ededed;
  bottom: 0;
  background-color: #fff;
  z-index: 10;
}

.tab-bar > div {
  text-align: center;
  padding: 0.18rem 0;
  font-size: 0.24rem;
  flex: 1;
  color: #999;
}
.tab-bar > div i {
  font-size: 0.4rem;
}
.tab-bar > div i > div:last-child {
  margin-top: 0.04rem;
}

.tab-bar .middle {
  position: relative;
}
.tab-bar .middle .study {
  width: 1.2rem;
  padding-top: 0.08rem;
  position: absolute;
  top: -0.5rem;
  left: 50%;
  border: 1px solid #ededed;
  border-radius: 2.4rem 2.4rem 0 0;
  border-bottom: 0;
  margin-left: -0.6rem;
  background-color: #fff;
}
.tab-bar .middle .study i {
  font-size: 0.92rem;
}
.tab-bar .middle .study::before {
  content: " ";
  position: absolute;
  width: 0.1rem;
  height: 0.8rem;
  left: -0.04rem;
  top: 0.5rem;
  background-color: #fff;
}

.tab-bar .middle .study::after {
  content: " ";
  position: absolute;
  width: 0.1rem;
  height: 0.8rem;
  right: -0.04rem;
  top: 0.5rem;
  background-color: #fff;
}
.tab-bar .middle .study::after .none {
  color: #fff;
}

.tab-bar .actived {
  color: #4d83ef;
}


.flex {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
}

.fixed {
    position: fixed;
    width: 100%;
    margin: 0 auto;
    left: 0; 
    right: 0;
}