node.js - 雪碧图插件sprity修改模版？

Question

{{#each layouts}}
  {{#each sprites}}

    {{#if dpi}}
    @media (-webkit-min-device-pixel-ratio: {{ratio}}), (min-resolution: {{dpi}}dpi) {
    {{/if}}
    .{{cssesc ../classname}} {
      background-image: url('{{escimage url}}');
      {{#if dpi}}
      background-size: {{baseWidth}}px {{baseHeight}}px;
      {{/if}}
    }
    {{#if dpi}}
    }
    {{/if}}
  {{/each}}

  {{#each layout.items}}
  .{{../classname}}-{{meta.name}} {
    background-position: -{{baseDim x}}px -{{baseDim y}}px;
    width: {{baseDim width}}px;
    height: {{baseDim height}}px;
  }
  {{/each}}
{{/each}}

需求：
页面是响应式的的
@media宽度大于1000px雪碧图正常显示
如

@media (min-width: 1000px) {
.icon-msg {
    background-position: -0px -0px;
  }
}

@media宽度小于1000px雪碧图缩放0.5倍
如

@media (max-width: 1000px) {
.icon-msg {
    background-position: -0px -0px;
    width: 11px;
    height: 11px;
  }
}