/* 为了包裹input[type=range]并允许我们使用::before和::after，我们创建一个额外的容器 */
.volume-slider-wrapper {
    display: flex;
    position: relative;
    border: #fff solid 1px;    
  }
  
  .volume-slider-wrapper::before,
  .volume-slider-wrapper::after {
    display: block;
    position: relative;
    z-index: 99;
    color: #fff;
    width: 100%;
    text-align: center;
    font-size: 1.5rem;
    line-height: 1;
    padding: 0.75rem 0;
    pointer-events: none;
  }
  .volume-slider-wrapper::before {
    content: "+";
  }
  .volume-slider-wrapper::after {
    content: "−";
    bottom: 0;
  }
  
  .custom-slider {
    -webkit-appearance: none;
    background-color: rgba(85, 85, 85, 0.34);
    position: relative;
    top: 50%;
    left: 50%;
    margin: 0;
    padding: 0;
    width: 60px; /* 修改为填充容器宽度 */
    height: 90%; /* 修改为填充容器高度 */
    transform: translate(-50%, -50%) rotate(-90deg);
    border-radius: 20px;
    overflow: hidden;
    cursor: row-resize;
  }
  
  .custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 0;
    box-shadow: -20rem 0 0 20rem rgb(224, 224, 224);
  }
  
  .custom-slider::-moz-range-thumb {
    border: none;
    width: 0;
    box-shadow: -20rem 0 0 20rem rgb(255, 0, 85);
  }