.pinpai2_1_2_1strengthMain{height:;overflow:hidden;}
.pinpai2_1_2_1strengthMain li{width:309px;height:340px;overflow:hidden;background:#000;position:relative;}
.pinpai2_1_2_1strengthMain li img{width:309px;height:340px;transition:all .5s;opacity:1;filter:alpha(opacity=40);}
.pinpai2_1_2_1strengthMain li:hover img{transform: scale(1.02, 1.01);}
.pinpai2_1_2_1strengthMain li .font::before,.pinpai2_1_2_1strengthMain li .font::after{position:absolute;content:'';opacity:0;transition:all 0.5s;}
.pinpai2_1_2_1strengthMain li .font::before{top:20px;right:10px;bottom:20px;left:10px;border-top:1px solid #fff;border-bottom:1px solid #fff;transform:scale(0,1);-webkit-transform-origin:0 0;transform-origin:0 0}
.pinpai2_1_2_1strengthMain li .font::after{top:10px;right:25px;bottom:10px;left:25px;border-right:1px solid #fff;border-left:1px solid #fff;transform:scale(1,0);transform-origin:100% 0;}
.pinpai2_1_2_1strengthMain li:hover .font::before,.pinpai2_1_2_1strengthMain li:hover .font::after{opacity:1;transform:scale(1);transition: all 0.5s;}