@media screen and (max-width: 1200px) {
  * {
    -webkit-tap-highlight-color: transparent;
  }
  body.indexBg {
    background: none;
  }
  body.indexBg .w {
    width: 680px;
  }
  body.indexBg .interact-wrap .topic-list-box iframe {
    width: 100% !important;
  }
}
@media screen and (max-width: 680px) {
  body.indexBg .w {
    width: 100%;
  }
  body.indexBg .navInfo {
    padding-left: 15px;
  }
}