button的css

<style lang="scss">
$h: 32px;
$border-color: #d9d9d9;
$color: #333;
$blue: #40a9ff;
$radius: 4px;
$red: red;
$grey: grey;

.gulu-button {
  box-sizing: border-box;
  height: $h;
  padding: 0 12px;
  cursor: pointer;
  display: inline-flex;//
  justify-content: center;
  align-items: center;
  white-space: nowrap;//
  background: white;
  color: $color;
  border: 1px solid $border-color;
  border-radius: $radius;
  box-shadow: 0 1px 0 fade-out(black, 0.95);//对黑色进行淡化fade-out
  transition: background 250ms;
  &+& { //意思是gulu-button+gulu-button
    margin-left: 8px;
  }
  &:hover,
  &:focus {
    color: $blue;
    border-color: $blue;
  }
  &:focus {
    outline: none;
  }
  &::-moz-focus-inner {
    border: 0;
  }
  &.gulu-theme-link{
    border-color: transparent;
    box-shadow: none;
    color: $blue;
    &:hover,&:focus{
      color: lighten($blue, 10%);
    }
  }
  &.gulu-theme-text{
    border-color: transparent;
    box-shadow: none;
    color: inherit;
    &:hover,&:focus{
      background: darken(white, 5%);;
    }
  }
    &.gulu-size-big{
      font-size: 24px;
      height: 48px;
      padding: 0 16px
    }
    &.gulu-size-small{
      font-size: 12px;
      height: 20px;
      padding: 0 4px;
    }
    // 
    &.gulu-theme-button {
    &.gulu-level-main {
      background: $blue;
      color: white;
      border-color: $blue;
      &:hover,
      &:focus {
        background: darken($blue, 10%);
        border-color: darken($blue, 10%);
      }
    }
    &.gulu-level-danger {
      background: $red;
      border-color: $red;
      color: white;
      &:hover,
      &:focus {
        background: darken($red, 10%);
        border-color: darken($red, 10%);
      }
    }
  }
  &.gulu-theme-link {
    &.gulu-level-danger {
      color: $red;
      &:hover,
      &:focus {
        color: darken($red, 10%);
      }
    }
  }
  &.gulu-theme-text {
    &.gulu-level-main {
      color: $blue;
      &:hover,
      &:focus {
        color: darken($blue, 10%);
      }
    }
    &.gulu-level-danger {
      color: $red;
      &:hover,
      &:focus {
        color: darken($red, 10%);
      }
    }
  }
// 
&.gulu-theme-button {
    &[disabled] {
      cursor: not-allowed;
      color: $grey;

      &:hover {
        border-color: $grey;
      }
    }
  }

  &.gulu-theme-link,
  &.gulu-theme-text {
    &[disabled] {
      cursor: not-allowed;
      color: $grey;
    }
  }

  >.gulu-loadingIndicator {
    width: 14px;
    height: 14px;
    display: inline-block;
    margin-right: 4px;
    border-radius: 8px;
    border-color: $blue $blue $blue transparent;
    border-style: solid;
    border-width: 2px;
    animation: gulu-spin 1s infinite linear;
  }
}

@keyframes gulu-spin {
  0% {
    transform: rotate(0deg)
  }

  100% {
    transform: rotate(360deg)
  }

}
</style>