.About_Us .sec1 {
  padding: 50px 0 80px;
}

.About_Us .sec1 .sec-pg {
  margin-bottom: 30px;
  font-size: 18px;
}

.About_Us .sec1 img {
  width: 93px;
}

.About_Us .sec1 .sec-item {
  margin-top: 30px;
}

.About_Us .sec1 .sec-item h6.sec-pg {
  margin: 30px 0 25px;
  font-size: 20px;
  color: #333;
}

.About_Us .sec1 .sec-item p.sec-pg {
  margin: 0 auto;
  font-size: 18px;
}

.About_Us .sec2 {
  height: 310px;
}

.About_Us .sec2 img {
  width: 62px;
}

.About_Us .sec2 .sec-tit {
  margin: 45px 0 40px;
}

.About_Us .sec3 {
  padding: 50px 0;
}

.About_Us .sec3 .sec-pg {
  margin: 25px 0;
}

.About_Us .sec3 .sec-box {
  width: 214px;
}

.About_Us .sec3 .sec-box:nth-child(3) {
  display: none;
}

.About_Us .sec3 .sec-box:nth-child(4) {
  display: block;
}

.About_Us .sec3 .sec-box:nth-child(4) span.sec-pg {
  color: #ccc;
}

.About_Us .sec3 .sec-box:nth-child(4) .sec-pg {
  margin: 20px 0 0;
  display: block;
}

@media (min-width: 750px) {
  .About_Us .sec1 {
    padding: 50px 0 80px;
  }
  .About_Us .sec1 .sec-pg {
    margin-bottom: 30px;
  }
  .About_Us .sec1 img {
    width: 93px;
  }
  .About_Us .sec1 .sec-item {
    margin-top: 30px;
  }
  .About_Us .sec1 .sec-item h6.sec-pg {
    margin: 30px 0 25px;
  }
  .About_Us .sec1 .sec-item p.sec-pg {
    margin: 0;
  }
  .About_Us .sec2 {
    height: 310px;
  }
  .About_Us .sec2 img {
    width: 62px;
  }
  .About_Us .sec2 .sec-tit {
    margin: 45px 0 40px;
  }
  .About_Us .sec3 {
    padding: 50px 0 100px;
  }
  .About_Us .sec3 .sec-pg {
    margin: 25px 0 60px;
  }
  .About_Us .sec3 .sec-box {
    width: 214px;
  }
  .About_Us .sec3 .sec-box:nth-child(3) {
    display: block;
  }
  .About_Us .sec3 .sec-box:nth-child(4) {
    display: none;
  }
  .About_Us .sec3 .atom:nth-child(1) {
    top: 10px;
    left: -155px;
  }
  .About_Us .sec3 .atom:nth-child(2) {
    top: 90px;
    left: -162px;
  }
  .About_Us .sec3 .atom:nth-child(3) {
    bottom: -120px;
    left: 45px;
  }
  .About_Us .sec3 .atom:nth-child(4) {
    top: 30px;
    right: -168px;
  }
  .About_Us .sec3 .atom:nth-child(5) {
    right: -77px;
    bottom: -30px;
  }
}

@media (min-width: 1200px) {
  .About_Us .sec1 {
    padding: 80px 0 110px;
  }
  .About_Us .sec1 .sec-pg {
    margin-bottom: 30px;
  }
  .About_Us .sec1 img {
    width: 93px;
  }
  .About_Us .sec1 .sec-item {
    margin-top: 90px;
  }
  .About_Us .sec1 .sec-item h6.sec-pg {
    margin: 30px 0 25px;
  }
  .About_Us .sec1 .sec-item p.sec-pg {
    margin: 0 auto;
    font-size: 16px;
    width: 102%;
  }
  .About_Us .sec2 {
    height: 410px;
  }
  .About_Us .sec2 img {
    width: 62px;
  }
  .About_Us .sec2 .sec-tit {
    margin: 45px 0 40px;
  }
  .About_Us .sec3 {
    padding: 140px 0 160px;
  }
  .About_Us .sec3 .sec-pg {
    margin: 25px 0 60px;
  }
  .About_Us .sec3 .sec-box {
    width: 414px;
  }
  .About_Us .sec3 .sec-box:nth-child(3) {
    display: block;
  }
  .About_Us .sec3 .sec-box:nth-child(4) {
    display: none;
  }
  .About_Us .sec3 .atom:nth-child(1) {
    top: 58px;
    left: -155px;
  }
  .About_Us .sec3 .atom:nth-child(2) {
    top: 217px;
    left: -200px;
  }
  .About_Us .sec3 .atom:nth-child(3) {
    bottom: -120px;
    left: 90px;
  }
  .About_Us .sec3 .atom:nth-child(4) {
    top: 90px;
    right: -185px;
  }
  .About_Us .sec3 .atom:nth-child(5) {
    right: -77px;
    bottom: 0;
  }
}

.About_Us .banner {
  position: relative;
  overflow: hidden;
}

.About_Us .banner .mengban {
  width: 100%;
  height: 100%;
  position: absolute;
  z-index: 0;
}

.About_Us .banner .img_bg {
  position: absolute;
  z-index: -1;
  top: -960px;
  left: -180px;
  will-change: transform;
  animation: banneryidong 30s 1s linear infinite alternate;
}

.About_Us .banner .container {
  position: relative;
  z-index: 1;
}

.About_Us .sec2 {
  position: relative;
  text-align: center;
  background: url("./../img/about_us/sec_bg.jpg") no-repeat center;
  background-size: cover;
  color: #fff;
}

.About_Us .sec2 .sec-item {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 0;
  transform: translate(-50%, -50%);
}

.About_Us .sec2 .sec-item h2.style-tit {
  color: #fff;
}

.About_Us .links:hover {
  color: #e37200;
}

@media screen and (min-width: 1200px) {
  .xz {
    animation: roate 1s;
    animation-fill-mode: forwards;
    animation-direction: alternate;
  }
  .sec1 {
    height: 670px;
    overflow: hidden;
  }
  .sec1 .container > div {
    margin-top: 50px;
    opacity: 0;
  }
  .sec2 .sec-item {
    opacity: 0;
    transition: opacity 1s linear;
  }
  .sec3 {
    height: 884px;
    overflow: hidden;
  }
  .sec3 .container {
    margin-top: 50px;
    opacity: 0;
  }
}

@keyframes roate {
  from {
    margin-top: 50px;
    opacity: 0;
  }
  to {
    margin-top: 0px;
    opacity: 1;
  }
}

@keyframes banneryidong {
  form {
    transform: translate(0, 0);
  }
  to {
    transform: translate(-140px, -140px);
  }
}