.strength{}
.strengthMain{height:;overflow:hidden;}
.strengthMain li{overflow:hidden;position:relative;}
.strengthMain li img{transition:all .5s;filter:alpha(opacity=40);}
.strengthMain li .font{width:600px;height:10px;top:0;left:0;position:absolute;color:#fff;text-align:center;}
.strengthMain li .font h3{font-size:36px;color:#fff;font-weight:normal;margin-bottom:20px;line-height:36px;}
.strengthMain li:hover img{transform: scale(1.05, 1.05);}
.strengthMain li .font::before,.strengthMain li .font::after{position:absolute;content:'';opacity:0;transition:all 0.5s;}
.strengthMain li .font::before{top:5px;right:15px;bottom:25px;left:1px;border-top:5px solid #f7c418;transform:scale(0,1);-webkit-transform-origin:0 0;transform-origin:0 0}
.strengthMain li .font::after{top:15px;right:25px;bottom:15px;left:25px;border-right:1px solid #fff;border-left:1px solid #fff;transform:scale(1,0);transform-origin:100% 0;}
.strengthMain li:hover .font::before,.strengthMain li:hover .font::after{opacity:1;transform:scale(1);transition: all 0.5s;}