/*数据北理鼠标经过的效果*/
 .bit-data{ -webkit-transition:-webkit-transform ease-out .1s,background .2s; -moz-transition:-moz-transform ease-out .1s,background .2s; transition:transform ease-out .1s,background .2s}
.bit-data:after {display: block;pointer-events:none; position:absolute; width:100%; height:100%; border-radius:50%; content:''; -webkit-box-sizing:content-box; -moz-box-sizing:content-box; box-sizing:content-box; top:0; left:0; padding:0; z-index:-1; box-shadow:0 0 0 2px rgba(255,255,255,.1);
 opacity:0; -webkit-transform:scale(.9); -moz-transform:scale(.9); -ms-transform:scale(.9); transform:scale(.9)}
.bit-data:hover { background:rgba(255,255,255,.05); -webkit-transform:scale(.93); -moz-transform:scale(.93); -ms-transform:scale(.93); transform:scale(.93);}
.bit-data:hover:after {content: '';display: block; -webkit-animation:sonarEffect 1.3s ease-out 75ms; -moz-animation:sonarEffect 1.3s ease-out 75ms;
 animation:sonarEffect 1.3s ease-out 75ms}