.collepicbtn {
  display: inline-block;
  width: 140px;
  height: 34px;
  text-align: center;
  text-decoration: none;
  line-height: 34px;
  outline: none;
  border-radius: 5px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
}
.collepicbtn::before,
.collepicbtn::after {
  position: absolute;
  z-index: -1;
  display: block;
  content: '';
}
.collepicbtn,
.collepicbtn::before,
.collepicbtn::after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-transition: all .3s;
  transition: all .3s;
}

.collepicbtn {
  position: relative;
  z-index: 2;
  background-color: #333;
  border: 2px solid #333;
  color: #fff;
  line-height: 30px;
}
.collepicbtn:hover {
  background-color: #fff;
  border-color: #59b1eb;
  color: #59b1eb;
}
.collepicbtn::before,
.collepicbtn::after {
  top: 0;
  width: 50%;
  height: 100%;
  background-color: #333;
}
.collepicbtn::before {
  right: 0;
}
.collepicbtn::after {
  left: 0;
}
.collepicbtn:hover::before,
.collepicbtn:hover::after {
  width: 0;
  background-color: #59b1eb;
}