.touch {
  height: 220px;
  width: 450px;
  overflow: hidden;
  position: relative;
  margin: 0 auto;
}
.touch .content {
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  position: absolute;
  font-size: 20px;
  background-color: black;
  color: black;
  text-align: center;
  visibility: hidden;
}

.touch:hover .content {
  visibility: visible;
  border: 4px solid red;
  background-color: rgba(255, 255, 255, 1);
}
.touch .content .btn {
  background-color: #e83375;
  color: white;
  cursor: pointer;
  border: none;
  width: 70px;
  height: 22px;
}
.touch .content .inpt {
  height: 18px;
  border: none line-height：18px;
  font-size: 12px;
}
.title {
  font-family:"微软雅黑";
  font-size: 50px;
}
.center {
  text-align: center;
}
.padding {
  padding: 30px;
  color: #05519d;
}
.line {
  display: inline-block;
  width: 200px;
  border-top: 2px solid #cccccc;
  vertical-align: 2px;
}
.block{
  display: flex;
}