//
// 像素计算
// ============================================================

=px-compute($styleName, $styleValues, $dprValue)
    $styleResult: ''

    @each $value in $styleValues
        @if type-of($value) == number
            $value : $value / ($value * 0 + 1)

            @if $dprValue == 1
                $styleResult: #{$styleResult + " " + round($value * $dprValue)}px

            @else
                $styleResult: #{$styleResult + " " + round($value * $dprValue / 2)}px

        @else
            $styleResult: #{$styleResult + " " + $value}

    #{$styleName}: $styleResult

=px($styleName, $styleValues...)
    @each $dprValue in $dpr
        @if $dprValue == 1
            +px-compute($styleName, $styleValues, $dprValue)
        @else
            [data-dpr="#{$dprValue}"] &
                +px-compute($styleName, $styleValues, $dprValue)