amis/scss/components/_alert.scss

.#{$ns}Alert {
  font-size: $Alert-fontSize;
  box-shadow: $Alert-boxShadow;
  padding: $Alert-paddingY $Alert-paddingX;
  border: $Alert-borderWidth solid $Alert-borderColor;
  border-radius: $Alert-borderRadius;
  margin-bottom: $Alert-marginBottom;

  &-close {
    outline: none;
    padding: 0;
    cursor: pointer;
    background: transparent;
    border: 0;
    float: right;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    filter: alpha(opacity=20);
    opacity: 0.2;

    &:hover {
      color: #000;
      text-decoration: none;
      cursor: pointer;
      filter: alpha(opacity=50);
      opacity: 0.5;
    }
  }

  &--danger {
    color: $Alert--danger-color;
    background-color: $Alert--danger-bg;
    border-color: $Alert--danger-borderColor;
  }

  &--info {
    color: $Alert--info-color;
    background-color: $Alert--info-bg;
    border-color: $Alert--info-borderColor;
  }

  &--success {
    color: $Alert--success-color;
    background-color: $Alert--success-bg;
    border-color: $Alert--success-borderColor;
  }

  &--warning {
    color: $Alert--warning-color;
    background-color: $Alert--warning-bg;
    border-color: $Alert--warning-borderColor;
  }
}