wx小程序修改swiper 点的样式

<swiper class="swiper-box" indicator-dots="{{ indicatordots }}" autoplay="{{ autoplay }}">
    <block wx:for="{{ swiperItem }}">
        <swiper-item>
            <navigator url="{{ item.linkUrl }}">
                <image class="slide-image" src="{{ item.imgUrl }}"></image>
            </navigator>
        </swiper-item>
    </block>
</swiper>

.swiper-box .wx-swiper-dots.wx-swiper-dots-horizontal{
     margin-bottom: 2rpx;
}
.swiper-box .wx-swiper-dot{
    width:40rpx;
    display: inline-flex;
    height: 10rpx;
    margin-left: 20rpx;
    justify-content:space-between;
}
.swiper-box .wx-swiper-dot::before{
    content: ‘‘;
    flex-grow: 1; 
    background: rgba(255,255,255,0.8);
    border-radius: 8rpx
}
.swiper-box .wx-swiper-dot-active::before{
    background:rgba(244,0,0,0.8);   
}