.slide_banner {
    width: 100%;
    float: left;
    height: 100%;
    position: relative;
    overflow: hidden;
    min-height: 580px;
  }
  .slide_banner .topic {
    background: none;
  }
  .slide_banner .simg {
    width: 100%;
    height: 100%;
    float: left;
    min-height: 580px;
    background-size: cover !important;
    background-color: #fff !important;
    position: relative;
    z-index: 3;
    background-position: center center !important;
  }
  .slide_banner .simg video {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    -o-object-fit: cover;
       object-fit: cover;
  }
  .slide_banner .sdot {
    position: absolute;
    bottom: 100px;
    right: 200px;
    z-index: 4;
  }
  .slide_banner .sdot li {
    width: 12px;
    height: 12px;
    border-radius: 7px;
    text-indent: -9999px;
    margin-right: 10px;
    background: #ccc;
    float: left;
    cursor: pointer;
  }
  .slide_banner .sdot .on {
    background: #fff;
    width: 30px;
    opacity: 1;
    filter: alpha(opacity=100);
    transition: 0.6s;
  }
  .slide_banner .sbutton {
    width: 100%;
    padding: 0 8%;
    position: absolute;
    left: 0;
    bottom: 76px;
    z-index: 6;
  }
  .slide_banner .sbutton .icon {
    position: absolute;
    left: 50%;
    bottom: 0px;
    width: 33px;
    margin-left: -16px;
  }
  .slide_banner .sbutton .icon span {
    position: relative;
    display: block;
    width: 100%;
    float: left;
    animation: myfirst 0.6s linear 0s infinite alternate;
    -moz-animation: myfirst 0.6s linear 0s infinite alternate;
    -webkit-animation: myfirst 0.6s linear0s infinite alternate;
    -o-animation: myfirst 0.6s linear 0s infinite alternate;
  }
  .slide_banner .sbutton .icon span .img2 {
    margin-top: -6px;
    opacity: 1;
    width: 30px;
    margin-left: 1px;
    animation: myfirst 0.6s linear 0.6s infinite alternate;
    -moz-animation: myfirst 0.6s linear 0.6s infinite alternate;
    -webkit-animation: myfirst 0.6s linear 0.6s infinite alternate;
    -o-animation: myfirst 0.6s linear 0.6s infinite alternate;
  }