$whiteBg: #fff;
//清楚浮动
@mixin clearfix() {
  &:before,
  &:after {
    content: "";
    display: table;
  }
  &:after {
    clear: both;
  }
}

//圆角边框
@mixin border-radius($radius) {
  -webkit-border-radius: $radius;
  -moz-border-radius: $radius;
  -ms-border-radius: $radius;
  border-radius: $radius;
}

// 透明度
@mixin opacity($opacity) {
  -webkit-border-radius: $radius;
  -moz-border-radius: $radius;
  -ms-border-radius: $radius;
  border-radius: $radius;
}

//文字溢出省略显示
@mixin text-ellipsis() {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

//盒模型阴影
@mixin shadow($x, $y, $blur, $color) {
  -webkit-box-shadow: $x $y $blur $color;
  -moz-box-shadow: $x $y $blur $color;
  box-shadow: $x $y $blur $color;
}

/*单条border样式*/
@mixin border-1px ($color, $direction) {
  content: '';
  position: absolute;
  background: $color;
  @if $direction == left {
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    transform: scaleX(0.5);
    transform-origin: left 0;
  }
  @if $direction == right {
    right: 0;
    top: 0;
    height: 100%;
    width: 2px;
    transform: scaleX(0.5);
    transform-origin: right 0;
  }
  @if $direction == bottom {
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    transform: scaleY(0.5);
    transform-origin: 0 bottom;
  }
  @if $direction == top {
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    transform: scaleY(0.5);
    transform-origin: 0 top;
  }
}

/*四条border样式*/
@mixin all-border-1px ($color, $radius) {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  border: 2px solid $color;
  border-radius: $radius * 2;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  width: 200%;
  height: 200%;
  -webkit-transform: scale(0.5);
  transform: scale(0.5);
  -webkit-transform-origin: left top;
  transform-origin: left top;
}