html - 在 CSS 之前使用，在背景中添加圆圈

Question

我想在导航按钮后面加一个圆圈。但我无法实现它。我正在使用 Swiper。

这些是我将圆定位在导航箭头下方时的一些快照。

如您所见，当我调整::before 的 margin-left 时，背景圆圈位于导航按钮上方。我正在使用 pseudo::before css 来创建圆圈。但我无法实现它。这是我的 CSS 作品。请检查一下，让我知道我哪里做错了？

.content .swiper-button-next {
    height: 25px;
    padding-left: 62px;
    padding-top: 0px;
    margin-top: -13px;
    z-index: 4 !important;
    position: absolute;
}

.swiper-button-next.swiper-button-white{
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%…2L2.9%2C2.1L5%2C0L27%2C22L27%2C22z'%20fill%3D'%23ffffff'%2F%3E%3C%2Fsvg%3E");
    right: 10px;
    left: auto;
}

.swiper-button-next, .swiper-button-prev {
    top: 50%;
    width: 27px;
    cursor: pointer;
    background-size: 27px 44px;
    background-position: center;
    background-repeat: no-repeat;
}


.content .swiper-button-next:before {
    content: '';
    display: inline-block;
    width: 50px;
    height: 50px;
    -moz-border-radius: 50%;
    border-radius: 50%;
    margin-left: -53px;
    margin-top: -11px;
    opacity: 0.7;
    z-index: -2;
    position: relative;
    background: #080808;
}

<div class="content swiper-container-horizontal swiper-container-free-mode">
    <div class="swiper-button-next swiper-button-white"></div>
</div>

提前谢谢你。

Answer 1

.swiper-button-next:before {
  content: '';
  display: inline-block;
  width: 50px;
  height: 50px;
  -moz-border-radius: 50%;
  border-radius: 50%;
  background-color: #060606;
  margin-left: -53px;
  margin-top: -11px;
  opacity: 0.8;
  z-index: -2;
  position: relative;
}

.swiper-button-next {
  height: 25px;
  padding-left: 62px;
  padding-top: 0px;
  margin-top: -13px;
  z-index: 4 !important;
  position: absolute;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%…2L2.9%2C2.1L5%2C0L27%2C22L27%2C22z'%20fill%3D'%23ffffff'%2F%3E%3C%2Fsvg%3E");
  right: 10px;
  left: auto;
  top: 50%;
  width: 27px;
  cursor: pointer;
  background-size: 27px 44px;
  background-position: center;
  background-repeat: no-repeat;
}
.arrow{ width: auto;
  display: inline-block;
  position: absolute;
  z-index: 9999;
  left: 31px;
  vertical-align: middle;
  color: #ffffff;
  opacity: 0.3;
  font-size:20px;
}

<div class="swiper-button-next swiper-button-white"><div class="arrow">❯<div></div>