taro/src/components/input/PickerViews.scss

/* #ifdef weapp */
.picker-mask {
    max-width: auto;
    // background: linear-gradient(0deg, rgba(28, 28, 28, 1) 0%,
    //         rgba(28, 28, 28, 0) 45%,
    //         rgba(28, 28, 28, 0) 55%,
    //         rgba(28, 28, 28, 1) 100%);
    background-size: 750px 340px !important;
    height: 340px;
    background-position: center center;
    background-repeat: no-repeat;
    z-index: 9;
    // color: #000 !important;
}

.picker{
    background-size: 750px 340px !important;
    height: 340px;
    // color: #000 !important;
}

/* #endif */

/* #ifdef rn */

/* #endif */