最终效果

 遇到的问题：
        1、无法直接修改 input 进度条进度条颜色，解决办法使用css3背景渐变解决

css： 需要注意加上-webkit-appearance: none 否则无效

 /*滑动条背景*/
  input[type="range"] {
    -webkit-appearance: none;
    width: 522px;
    height: 24px;
    background: linear-gradient(90deg, #1C2D4B 0%, #292F3A 100%);
    border-radius: 12px;
    box-shadow: 0px 0px 8px 0px rgba(68,119,255,1);
  }
  input[type="range"]::-ms-fill-lower {
    -webkit-appearance: none;
    background: #f00;
  }
  /*滑动条操作按钮样式*/
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 6px;
    height: 24px;
    background: #4477FF;
    box-shadow: 0px 0px 6px 0px rgba(68,119,255,1);
  }

完整案例：

<template>
  <div style="margin: 50px;">
    <input
      v-model="input"
      max="1000"
      :style="{'background': `linear-gradient(to right, rgba(68, 119, 255, 0.2) ${getPercent(input, 1000)}%, #252E3F ${ getPercent(input, 1000)}% `}"
      type="range">
    <span class="c_fff">{{input}}</span>
  </div>
</template>

<script>
export default {
  data () {
    return {
      input: 0
    }
  },
  mounted () {
  },
  methods: {
    getPercent (num, total) {
      num = parseFloat(num)
      total = parseFloat(total)
      if (isNaN(num) || isNaN(total)) {
        return 0
      }
      return total <= 0 ? 0 : (Math.round(num / total * 10000) / 100.00)
    },
  }
}

</script>

<style lang="less">
  /*滑动条背景*/
  input[type="range"] {
    -webkit-appearance: none;
    width: 522px;
    height: 24px;
    background: linear-gradient(90deg, #1C2D4B 0%, #292F3A 100%);
    border-radius: 12px;
    box-shadow: 0px 0px 8px 0px rgba(68,119,255,1);
  }
  input[type="range"]::-ms-fill-lower {
    -webkit-appearance: none;
    background: #f00;
  }
  /*滑动条操作按钮样式*/
  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 6px;
    height: 24px;
    background: #4477FF;
    box-shadow: 0px 0px 6px 0px rgba(68,119,255,1);
  }
</style>