解决方法有三种
一、::v-deep
.little-box3 ::v-deep img {
max-height: 175px;
}
.little-box4 ::v-deep .imgBox-1 img{
width: 300px;
height: 200px;
}
二、/deep/
.little-box3 /deep/ img {
max-height: 175px;
}
三、>>>
.little-box3 >>> img {
max-height: 175px;
}