css

 .cimage {
            margin: 20rpx 0;
            display: flex;
            flex-wrap: wrap;
            .cimage-li {
                 216rpx;
                height: 216rpx;
                margin-right: 3%;
                display: flex;
                align-items: center;
                border: 1px solid #eee;
                border-radius: 6rpx;
                overflow: hidden;
                image {
                     100%;
                }
                margin-bottom: 15rpx;
            }
        }
.cimage .cimage-li:nth-child(3n) {
    margin-right: 0;
}