client-app/components/hc-tabbar/style.scss

.hc-tabbar-box {
    position: fixed;
    bottom: 0;
    right: 0;
    left: 0;
    background: white;
    z-index: 8090;
    padding: 28rpx 28rpx calc(var(--window-bottom) + 34rpx);
    box-shadow: 0 -12rpx 10rpx -12rpx rgba(215, 224, 253, 100);
}