// 清除浮动（嵌套用）
@mixin clearfix {
  &:after {
    content: '';
    display: table;
    clear: both;
  }
}

// WebKit 滚动条配色（用于可滚动容器）
@mixin scrollBar {
  &::-webkit-scrollbar-track-piece {
    background: #d3dce6;
  }

  &::-webkit-scrollbar {
    width: 6px;
  }

  &::-webkit-scrollbar-thumb {
    background: #99a9bf;
    border-radius: 20px;
  }
}

// 铺满父级的相对定位层
@mixin relative {
  position: relative;
  width: 100%;
  height: 100%;
}

// 百分比宽度水平居中块
@mixin pct($pct) {
  width: #{$pct};
  position: relative;
  margin: 0 auto;
}

// CSS 三角箭头（极少用，保留兼容）
@mixin triangle($width, $height, $color, $direction) {
  $width: $width/2;
  $color-border-style: $height solid $color;
  $transparent-border-style: $width solid transparent;
  height: 0;
  width: 0;

  @if $direction==up {
    border-bottom: $color-border-style;
    border-left: $transparent-border-style;
    border-right: $transparent-border-style;
  } @else if $direction==right {
    border-left: $color-border-style;
    border-top: $transparent-border-style;
    border-bottom: $transparent-border-style;
  } @else if $direction==down {
    border-top: $color-border-style;
    border-left: $transparent-border-style;
    border-right: $transparent-border-style;
  } @else if $direction==left {
    border-right: $color-border-style;
    border-top: $transparent-border-style;
    border-bottom: $transparent-border-style;
  }
}