@media only screen and (max-width: 1366px) {
  .sectionBox .brcr .w1280 {
    width: 1100px;
  }
  .Introduce_con .w1280 {
    width: 1100px;
  }
}
@media only screen and (max-width: 1200px) {
  .sectionBox .brcr .w1280 {
    width: 900px;
  }
  .Introduce_con .w1280 {
    width: 900px;
  }
}
@media screen and (min-width: 768px) and (max-width: 992px) {
  .sectionBox .brcr .w1280 {
    width: 700px;
  }
  .Introduce_con .w1280 {
    width: 700px;
  }
}
@media only screen and (max-width: 767px) {
  .sectionBox .brcr .w1280 {
    width: 96%;
  }
  .Introduce_con .w1280 {
    width: 96%;
  }
}