taro/src/components/input/Slider2.scss

.slider-container {
    position: relative;
    width: 138px;
    height: 304px;
    // background-color: transparent;
    border-radius: 36px;
    overflow: hidden;
    touch-action: none;
    border: solid 4px #00ffff;
    box-sizing: border-box;
    background: linear-gradient(to bottom,red,#00ffff);
}

.slider-top{
    position: absolute;
    width: 100%;
    background-color: #000;
    transform: height 0.2s;
}

.slider-bar {
    position: absolute;
    width: 100%;
    background-color: transparent;
    // background-color: #00ffff;
    bottom: 0;
    transition: height 0.2s;
}

.slider-handle {
    position: absolute;
    bottom: 0;
    width: 100%;
    text-align: center;
    color: #fff;
}