.part-xzmm {
    height: 500px;
    border: 4px solid;
    border-image: linear-gradient(pink, yellow) 30 30;
    position: relative;
}

.part-xzmm .str_tit {
    width: 55px;
    height: 145px;
    float: left;
    background: url(images/jingling2.png) -897px -532px no-repeat;
}

.part-xzmm .str_box {
    perspective: 800px;
    transform: translateY(220px);
}

.str_box .str_box_son {
    width: 165px;
    height: 100px;
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(-10deg);
    margin: auto;
}

.str_box_son img {
    border: 2px solid;
    border-image: linear-gradient(pink, skyblue) 15 15;
    width: 100%;
    height: 100%;
    position: absolute;
}