这是我用的，你可以看看

swiper .wx-swiper-dot{display:inline-block;width:6px;height:6px;margin:0 5px;background:#d3d0cc;border-radius:3px;}

swiper .wx-swiper-dot::before{content:’’;}

swiper .wx-swiper-dot-active{width:10px;background:#d74141;}