老师您好，在实现轮播图的dots时，我的dot没有位于图片下方，而是位于整个页面下方，请问一下这该如何解决？我直接copy了源码里的stylus。

slider组件

<template>
  <div class="slider" ref="slider">
    <div class="slider-group" ref="sliderGroup">
      <slot></slot>
    </div>
    <div class="dots">
      <span class="dot" :key="index" v-for="(item, index) in dots" :class="{active: currentPageIndex === index}"></span>
    </div>
  </div>
</template>

<script type="text/ecmascript-6">
import BScroll from 'better-scroll'
import {addClass} from 'common/js/dom'

export default {
  data() {
    return {
      dots: [],
      currentPageIndex: 0
    }
  },
  props: {
    loop: {
      type: Boolean,
      default: true
    },
    autoPlay: {
      type: Boolean,
      default: true
    },
    interval: {
      type: Number,
      default: 4000
    }
  },
  mounted () {
    setTimeout(() => {
      this._setSliderWidth()
      this._initDots()
      this._initSlider()

      if (this.autoPlay) {
        this._play()
      }
    }, 20)
    window.addEventListener('resize', () => {
      if (!this.slider) {
        return
      }
      this._setSliderWidth(true)
      this.slider.refresh()
    })
  },
  methods: {
    _setSliderWidth (isResize) {
      this.children = this.$refs.sliderGroup.children
      let width = 0
      let sliderWidth = this.$refs.slider.clientWidth
      for (let i = 0; i < this.children.length; i++) {
        let child = this.children[i]
        addClass(child, 'slider-item')
        child.style.width = sliderWidth + 'px'
        width += sliderWidth
      }
      if (this.loop && !isResize) {
        width += 2 * sliderWidth
      }
      this.$refs.sliderGroup.style.width = width + 'px'
    },
    _initDots() {
      this.dots = new Array(this.children.length)
    },
    _initSlider () {
      this.slider = new BScroll(this.$refs.slider, {
        scrollX: true,
        scrollY: false,
        momentum: false,
        snap: true,
        snapLoop: this.loop,
        snapThreshold: 0.3,
        snapSpeed: 400
      })

      this.slider.on('scrollEnd', () => {
        let pageIndex = this.slider.getCurrentPage().pageX
        if (this.loop) {
          pageIndex -= 1
        }
        this.currentPageIndex = pageIndex
        if (this.autoPlay) {
          clearTimeout(this.timer)
          this._play()
        }
      })
    },
    _play() {
      let pageIndex = this.currentPageIndex + 1
      if (this.loop) {
        pageIndex += 1
      }
      this.timer = setTimeout(() => {
        this.slider.goToPage(pageIndex, 0, 400)
      }, this.interval)
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import "~common/stylus/variable"

  .slider
    min-height: 1px
    .slider-group
      position: relative
      overflow: hidden
      white-space: nowrap
      .slider-item
        float: left
        box-sizing: border-box
        overflow: hidden
        text-align: center
        a
          display: block
          width: 100%
          overflow: hidden
          text-decoration: none
        img
          display: block
          width: 100%
    .dots
      position: absolute
      right: 0
      left: 0
      bottom: 12px
      transform: translateZ(1px)
      text-align: center
      font-size: 0
      .dot
        display: inline-block
        margin: 0 4px
        width: 8px
        height: 8px
        border-radius: 50%
        background: $color-text-l
        &.active
          width: 20px
          border-radius: 5px
          background: $color-text-ll
</style>

recommend

<template>
  <div class="recommend">
    <div class="recommend-content">
      <div>
      <div v-if="recommends.length" class="recommend-wrapper">
        <slider>
          <div :key="index" v-for="(item, index) in recommends">
            <a :href="item.linkUrl">
              <img :src="item.picUrl">
            </a>
          </div>
        </slider>
      </div>
      <div class="recommend-list">
        <h1 class="list-title">热门歌单推荐</h1>
        <ul></ul>
      </div>
      </div>
    </div>
  </div>
</template>

<script>
import Slider from 'base/slider/slider'
import {getRecommend} from 'api/recommend'
import {ERR_OK} from 'api/config'

export default {
  data () {
    return {
      recommends: []
    }
  },
  created () {
    this._getRecommend()
  },
  methods: {
    _getRecommend () {
      getRecommend().then(res => {
        if (res.code === ERR_OK) {
          this.recommends = res.data.slider
        }
      })
    }
  },
  components: {
    Slider
  }
}
</script>

<style lang="stylus" scoped>
  @import "~common/stylus/variable"

  .recommend
    position: fixed
    width: 100%
    top: 88px
    bottom: 0
    .recommend-content
      height: 100%
      overflow: hidden
      .slider-wrapper
        position: relative
        width: 100%
        height: 0
        padding-top: 40%
        overflow: hidden
        .slider-content
          position: absolute
          top: 0
          left: 0
          width: 100%
          height: 100%
      .recommend-list
        .list-title
          height: 65px
          line-height: 65px
          text-align: center
          font-size: $font-size-medium
          color: $color-theme
        .item
          display: flex
          box-sizing: border-box
          align-items: center
          padding: 0 20px 20px 20px
          .icon
            flex: 0 0 60px
            width: 60px
            padding-right: 20px
          .text
            display: flex
            flex-direction: column
            justify-content: center
            flex: 1
            line-height: 20px
            overflow: hidden
            font-size: $font-size-medium
            .name
              margin-bottom: 10px
              color: $color-text
            .desc
              color: $color-text-d
      .loading-container
        position: absolute
        width: 100%
        top: 50%
        transform: translateY(-50%)
</style>