.cooperation-banner img {
  width: 100%;
}
.main-content {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  margin-top: 56px;
}
.main-content ul {
  display: flex;
  width: 1200px;
  justify-content: space-between;
  padding-bottom: 100px;
}
.main-content ul li {
  box-sizing: border-box;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  width: 384px;
  height: 479px;
  text-align: center;
  padding: 40px 0 20px;
  color: #333;
  font-size: 18px;
  background-color: #fdfdfd;
  position: relative;
  transition: transform 0.2s;
}
.main-content ul li::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 8px;
  width: 0;
  height: 3px;
  transition: width 0.2s;
}
.main-content ul li:hover {
  transform: translateY(-4px);
}
.main-content ul li:hover::after {
  content: '';
  width: 340px;
  background-color: #1e98c5;
}
.main-content ul li .cooperation-title {
  padding-top: 20px;
  font-size: 26px;
  color: #333;
}
.main-content ul li .cooperation-content {
  line-height: 30px;
  padding: 20px 50px 0;
}
.main-content ul li .email {
  padding-top: 90px;
  line-height: 40px;
}
.main-content ul li .email img {
  vertical-align: middle;
  margin-top: -3px;
}
.main-content ul li:last-child .email {
  padding-top: 120px;
}