.banner {
  width: 100%;
  height: 460px;
  background-image: url(/images/aboutus/1/1.png);
  background-size: cover;
  background-position: center center;
}
.banner .w-1200 {
  height: 100%;
  padding: 160px 0 0;
  position: relative;
}
.banner .w-1200 p {
  max-width: 652px;
  font-size: 36px;
  color: #303133;
  line-height: 50px;
  font-weight: 600;
}
.banner .w-1200 .contact-btn {
  width: 106px;
  height: 32px;
  background-color: #2D914B;
  border: none;
  font-size: 14px;
  color: #fff;
  position: absolute;
  left: 0;
  bottom: 88px;
}
.page-nav {
  width: 100%;
  height: 60px;
  background: #f4f5f7;
  box-shadow: 0px 3px 23px 0px #f4f5f7;
}
.page-nav ul {
  display: flex;
  justify-content: space-between;
}
.page-nav ul .nav-item {
  line-height: 60px;
  text-align: center;
  font-size: 16px;
  color: #303133;
  display: inline-block;
  vertical-align: middle;
}
.page-nav ul .nav-item a {
  height: 57px;
  display: inline-block;
  position: relative;
  border-bottom: 3px solid #f4f5f7;
}
.page-nav ul .nav-item:hover a {
  color: #2D914B;
}
.page-nav ul .nav-item.active a {
  color: #2D914B;
  border-color: #2D914B;
}
.main {
  font-size: 0;
}
.main .sec-1 {
  padding-top: 64px;
  box-sizing: border-box;
  background: url(/images/aboutus/2/1.png) no-repeat center center;
  background-size: cover;
  height: 622px;
}
.main .sec-1 .title {
  font-size: 30px;
  color: #191919;
  line-height: 30px;
  font-weight: 600;
  text-align: center;
}
.main .sec-2 {
  padding-top: 64px;
  box-sizing: border-box;
  background: url(/images/aboutus/2/2.png) no-repeat center center;
  background-size: cover;
  height: 494px;
}
.main .sec-2 .title {
  font-size: 30px;
  color: #191919;
  line-height: 30px;
  font-weight: 600;
  text-align: center;
}
.main .sec-3 {
  padding-top: 64px;
  box-sizing: border-box;
  background: url(/images/aboutus/2/3.png) no-repeat center center;
  background-size: cover;
  height: 486px;
}
.main .sec-3 .title {
  font-size: 30px;
  color: #191919;
  line-height: 30px;
  font-weight: 600;
  text-align: center;
}
.main .sec-4 {
  padding-top: 64px;
  box-sizing: border-box;
  background: url(/images/aboutus/2/2.png) no-repeat center center;
  background-size: cover;
  height: 541px;
}
.main .sec-4 .title {
  font-size: 30px;
  color: #191919;
  line-height: 30px;
  font-weight: 600;
  text-align: center;
}