微信小程序背景图片显示不出来

.page__bd{
    width: 100%;
    height: 220px;
    background: url('../../assets/img/images.jpg') no-repeat;
    background-size: 100% 100%;
}

<view class='set-background'>
    <image class='background-image' src='{{item.countryPic}}'></image>
    <view class='background-content'>
        <view class="set-background-avatar" background-size="cover">
            <image class="post-specific-image" src="{{item.picture}}"></image>
        </view>
    </view>
</view>

.set-background {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 150px;
}
.set-background-avatar {
    width: 220px;
    height: 150px;
}
.background-content {
    position: absolute;
    z-index: 1;
}
.background-image {
    width: 225px;
    height: 150px;
    opacity: 0.8;
}
.post-specific-image {
    width: 215px;
    height: 150px;
    vertical-align: middle;
}