.center_w {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  align-content: center;
}

.btn {
  position: relative;
  width: 40px;
  height: 40px;
  background: linear-gradient(180deg, #87CDEE 0%, #69C0E9 34%, #7ECDF2 51%, #56B9E6 63%, #81D7FE 100%);
  box-shadow: 0px 2px 4px 0px #BDCDE2;
  border-radius: 4px;
  border: 1px solid rgba(76, 106, 118, 0.22);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 15%;
}

.no_btn {
  width: 40px;
  height: 40px;
  background: #E2F3FA;
  box-shadow: 0px 2px 4px 0px rgba(81,84,90,0.5);
  border-radius: 4px;
  border: 1px solid rgba(171, 207, 223, 0.22);
  cursor: not-allowed;

  .sjx {
    border-left: 12px solid #9FB5BC;
  }

  .sjx1 {
    border-left: 0px solid #9FB5BC;
    border-right: 12px solid #9FB5BC;
  }
}

.sjx {
  width: 0;
  height: 0;
  border-left: 12px solid #fff;
  border-bottom: 12px solid transparent;
  border-top: 12px solid transparent;
  transition: all 0.15s ease-in;
}

.sjx1 {
  border-left: 0px solid #fff;
  border-right: 12px solid #fff;
}