.maintxt {
  width: 100%;
  background: url("../images/about-bg.png") no-repeat;
  background-size: 100% 583px;
  position: relative;
  min-height: 583px;
}

@media screen and (max-width: 768px) {
  .maintxt {
    min-height: 224px;
    background-size: 100% 224px;
  }
}

.maintxt-content {
  background: #ffffff;
  padding: 54px 67px;
  width: 1000px;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  transform: translateY(50%);
  border-radius: 10px;
}

@media screen and (max-width: 768px) {
  .maintxt-content {
    width: 90%;
    padding: 10px;
    top: -100%;
    bottom: auto;
  }
}

@media screen and (max-width: 320px) {
  .maintxt-content {
    top: -162%;
  }
}

.maintxt-content h1 {
  text-align: center;
  font-size: 30px;
  color: #333333;
  margin-bottom: 54px;
}

@media screen and (max-width: 768px) {
  .maintxt-content h1 {
    font-size: 18px;
    margin-bottom: 20px;
  }
}

.maintxt-content p {
  color: #333333;
  line-height: 28px;
  font-size: 18px;
}

@media screen and (max-width: 768px) {
  .maintxt-content p {
    font-size: 12px;
  }
}

.empty {
  min-height: 350px;
  background: #F4F5FC;
}

@media screen and (max-width: 768px) {
  .empty {
    min-height: 650px;
  }
}

.operation {
  padding: 75px 0 100px 0;
  text-align: center;
}

@media screen and (max-width: 768px) {
  .operation {
    padding: 30px 0;
  }
}

.operation h2 {
  font-size: 30px;
  color: #333333;
  margin-bottom: 50px;
}

@media screen and (max-width: 768px) {
  .operation h2 {
    font-size: 18px;
    margin-bottom: 20px;
  }
}

.operation .secondTitle {
  color: #333333;
  font-size: 16px;
  max-width: 1200px;
  margin: auto;
  line-height: 28px;
}

@media screen and (max-width: 768px) {
  .operation .secondTitle {
    font-size: 14px;
    color: #808080;
    width: 90%;
  }
}

.operation-content {
  width: 890px;
  margin: auto;
  margin-top: 38px;
}

@media screen and (max-width: 768px) {
  .operation-content {
    margin-top: 30px;
    width: 90%;
  }
}

.operation-content-item {
  width: 420px;
  margin-right: 50px;
  float: left;
}

@media screen and (max-width: 768px) {
  .operation-content-item {
    width: 100%;
    float: none;
    margin-bottom: 16px;
  }
}

.operation-content-item:last-child {
  margin-right: 0;
}

.operation-content-item-top {
  width: 100%;
  height: 90px;
  position: relative;
}

@media screen and (max-width: 768px) {
  .operation-content-item-top {
    height: 60px;
  }
}

.operation-content-item-top img {
  width: 100%;
  height: 100%;
}

.operation-content-item-top p {
  color: #ffffff;
  padding-left: 32px;
  background: url("../images/empower-icon2.png") no-repeat left center;
  background-size: 25px 30px;
  position: absolute;
  top: 50%;
  left: 50%;
  font-size: 22px;
  transform: translate(-50%, -50%);
  z-index: 100;
}

@media screen and (max-width: 768px) {
  .operation-content-item-top p {
    font-size: 18px;
    background-size: 20px 24px;
  }
}

.operation-content-item-bot {
  background: #ffffff;
  box-shadow: 0 4px 10px rgba(51, 160, 255, 0.4);
  padding: 20px;
}

.operation-content-item-bot p {
  text-align: left;
  font-size: 16px;
  color: #333333;
  line-height: 20px;
  margin-bottom: 10px;
}

@media screen and (max-width: 768px) {
  .operation-content-item-bot p {
    font-size: 14px;
  }
}

.operation-content-item-bot p:last-child {
  margin-bottom: 0;
}

.operation-content-item:hover .operation-content-item-top::after {
  content: '';
  width: 100%;
  height: 100%;
  background: #33aef0;
  position: absolute;
  top: 0;
  left: 0;
  opacity: .5;
}

.contact {
  padding: 75px 0 0 0;
  text-align: center;
  background-color: #F4F5FC;
}

@media screen and (max-width: 768px) {
  .contact {
    padding: 30px 0 0 0;
  }
}

.contact h2 {
  font-size: 30px;
  color: #333333;
  margin-bottom: 50px;
}

@media screen and (max-width: 768px) {
  .contact h2 {
    font-size: 18px;
    margin-bottom: 20px;
  }
}

.contact-list {
  width: 1180px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  margin-bottom: 46px;
}

@media screen and (max-width: 768px) {
  .contact-list {
    width: 90%;
    flex-wrap: wrap;
    justify-content: center;
  }
}

.contact-list-item img {
  width: 18px;
  margin-right: 8px;
}

@media screen and (max-width: 768px) {
  .contact-list-item img {
    width: 12px;
    margin-right: 3px;
  }
}

.contact-list-item span {
  color: #333333;
  font-size: 16px;
}

@media screen and (max-width: 768px) {
  .contact-list-item span {
    font-size: 12px;
  }
}