// 中心元素
.abs-center-container {
  position: relative;
}

.abs-center {
  overflow: auto;
  margin: auto;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  &.abs-fixed {
    position: fixed;
    z-index: 999;
  }
  &.abs-right {
    left: auto;
    right: 20px;
    text-align: right;
  }
  &.abs-left {
    right: auto;
    left: 20px;
    text-align: left;
  }
}

@media (max-width: 320px) {
  .abs-center {
    padding: 0 10px;
  }
}

@media (max-height: @screen-sm) {
  .abs-center {
    position: relative;
  }
}