.content {
  margin: 0 auto;
  max-width: 1200px;
}

.heading {
  width: 100%;
  margin-left: 1rem;
  font-weight: 900;
  font-size: 1.618rem;
  text-transform: uppercase;
  letter-spacing: .1ch;
  line-height: 1;
  padding-bottom: .5em;
  margin-bottom: 1rem;
  position: relative;
}
.heading:after {
  display: block;
  content: '';
  position: absolute;
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, #1a9be6, #1a57e6);
  bottom: 0;
}

.description {
  width: 100%;
  margin-top: 0;
  margin-left: 1rem;
  margin-bottom: 3rem;
}

.pro_content .card {
  color: inherit;
  cursor: pointer;
  width: 575px;
  height: 300px;
  float:left;
  min-height: 300px;
  position: relative;
}
@media screen and (max-width: 800px) {
  .card {
    width: calc(50% - 2rem);
  }
}
@media screen and (max-width: 500px) {
  .card {
    width: 100%;
  }
}

.front p {
  font-size: 20px;
}

.front,
.back {
  display: flex;
  border-radius: 16px;
  background-position: center;
  background-size: cover;
  text-align: center;
  justify-content: center;
  align-items: center;
  position: absolute;
  height: 100%;
  width: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform-style: preserve-3d;
  transition: ease-in-out 600ms;
}

.front {
  background-size: cover;
  padding:;
  font-size: 1.618rem;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
  font-family: 'Microsoft Yahei', sans-serif;
}
.front:before {
  position: absolute;
  display: block;
  content: '';
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, #1a9be6, #000);
  opacity: .15;
  z-index: -1;
}
.card:hover .front {
  transform: rotateY(180deg);
}
.card:nth-child(even):hover .front {
  transform: rotateY(-180deg);
}

.back {
  background:#fff;
  border:1px solid #ccc;
  transform: rotateY(-180deg);
  box-shadow: 0 2px 10px 2px rgba(0, 0, 0, 0.25);
}
.back .b_con{position:relative;padding:0 25px;width:525px;height:200px;margin-top:0px;background:#fff;}
.back .p1{font-size:22px;line-height:46px;margin-top:0px;font-weight:bold;}
.back .p2{margin-top:20px;text-align:center;}
.back p{font-size:14px;line-height:36px;text-align:center;}
.card:hover .back {
  transform: rotateY(0deg);
}
.card:nth-child(even) .back {
  transform: rotateY(180deg);
}
.card:nth-child(even):hover .back {
  transform: rotateY(0deg);
}

.button1 {
    margin:25px auto;
    display:block;
    font-weight:bold;
    text-decoration: none;
    color: #333;
    background: #fff;
    font-size:14px;
    line-height:30px;
    text-align:center;
    width:110px;
    height:35px;
    border: 1.5px solid #333;
}

.button1:hover {
    background: #333;
    color: #fff;
}
.button:hover:before {
}
.button:active {
}
.button:active:before {
  top: 12px;
}