纯CSS实现箭头，圆点， 三角形。_html/css_WEB-ITnose

.goback {      position: absolute;      top: 18px;      left: 18px;      border: 10px solid transparent;      border-right: 10px solid #ccc;    }        .goback:hover {      border-right: 10px solid #808080;    }        .goback:after {      content: '';      position: absolute;      top: -10px;      left: -7px;      border: 10px solid transparent;      border-right: 10px solid #fff;    }

  .circle {      position: absolute;      margin: 52px 45px;      width: 12px;      height: 12px;      background: #fff;      border-radius: 50%;      border: 1px solid #2090ff;    }        .circle:after {      content: '';      margin: 3px;      display: table;      width: 6px;      height: 6px;      background: #2090ff;      border-radius: 50%;    }

.triangle {      position: absolute;      top: 16px;      right: 18px;      border: 6px solid transparent;      border-top: 6px solid #123456;    }