.card-title {
    font: "PingFang-SC-medium";
    color: #333;
    font-size: 18px;
}

.card-title {
    font: "PingFang-SC-regular";
    font-size: 14px;
    color: #333;
}

// 申明less函数
.mixin-font-class(@fontColor: yellow; @fontSize; @fontFamily) {
    font-family: @fontFamily;
    font-size: @fontSize;
    color: @fontColor;
}

h6 {
        .mixin-font-class(@fontColor:red;@fontSize:12px;@fontFamily:"PingFang-SC-medium");
}
h2{
      .mixin-font-class(@fontColor:blue;@fontSize:15px;@fontFamily:"PingFang-SC-regular");
}

// 添加全局less
pluginOptions: {
        'style-resources-loader': {
            preProcessor: 'less',
            patterns: [
                resolve('./src/less/theme.less')
            ]
        }
},

// 在任何组件中或者less文件中使用
<style lang="less" scoped>
.breadTop {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-right: 15px;
    h6 {
        .mixin-font-class(@fontColor:red;@fontSize:12px;@fontFamily:"PingFang-SC-medium");
       }
       h2{
            .mixin-font-class(@fontColor:blue;@fontSize:15px;@fontFamily:"PingFang-SC-regular");
       }
}
</style>

$font-normal-color = #222;
$font-light-color = #333;

@mixin font-class($fontFamily, $fontSize, $fontColor) {
    font-family: $fontFamily;
    font-size: $fontSize;
    color: $fontColor;
}

@mixin font-large($size: 14px, $color: $font-normal-color) {
    @include font-class($font-family-medium, $size, $color);
}

@mixin font-normal($size: 14px, $color: $font-light-color) {
    @include font-class($font-family-regular, $size, $color);
}

.form-title {
    @include font-large(16px, red);
}

.form-text {
    @include font-large(12px, blue);
}