.banner {
  width: 100%;
  position: relative;
  z-index: 1;
  overflow: hidden;
  /*margin-top: 50px;*/
}
.banner .bd ul {
  width: 100% !important;
}

.banner .bd li {
  width: 100% !important;
  height: calc(100vh - 50px);
  background-position: center 0;
  background-attachment: fixed;
  background-repeat: no-repeat;
  /* background-position: 0 130px; */
  min-width: 1200px;
  background-size: 100%;
}

.banner .bd li a {
  display: block;
  width: 1400px;
  margin: 0 auto;
  height: 100%;
}

.banner .hd {
  position: absolute;
  left: 0;
  top: 850px;
  z-index: 1;
  width: 100%;
  overflow: hidden;
}

.banner .hd ul {
  text-align: center;
}

.banner .hd ul li {
  cursor: pointer;
  display: inline-block;
  *display: inline;
  zoom: 1;
  width: 10px;
  height: 10px;
  margin: 5px;
  overflow: hidden;
  font-size: 0;
  background-color: #fff;
  border-radius: 50%;
}

.banner .hd ul .on {
  background-color: #ff0;
}

.banner .prev,
.banner .next {
  z-index: 1;
  display: block;
  width: 53px;
  height: 44px;
  position: relative;
  float: left;
  background: url(../image/arrow.png) 0 center no-repeat;
  filter: alpha(opacity=40);
  opacity: 0.4;
  position: absolute;
  top: 50%;
  margin-top: -22px;
}

.banner .prev {
  left: 2.1%;
  margin-left: 10px;
}

.banner .next {
  background-position: right 0;
  right: 2.1%;
  margin-right: 10px;
}

.banner .prev:hover,
.banner .next:hover {
  filter: alpha(opacity=80);
  opacity: 0.8;
}
.banner .arrow {
  position: absolute;
  top: 25%;
  margin-top: 0;
  width: 100px;
  height: 50%;
  padding: 0;
  cursor: pointer;
}

.banner .arrow span,
.banner .arrow span:after,
.banner .arrow span:before {
  position: absolute;
  top: 50%;
  height: 2px;
  background-color: #fff;
  border-radius: 1px;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transition: all 0.4s ease;
  transition: all 0.4s ease;
}

.banner .arrow span {
  margin-top: -1px;
  width: 0;
}

.banner .arrow span:after,
.banner .arrow span:before {
  content: "";
  width: 30px;
}

.banner .arrow.btn-prev span {
  left: 50%;
  margin-left: -10px;
}

.banner .arrow.btn-prev span:before {
  left: 0;
  bottom: 0;
  -webkit-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  transform: rotate(-45deg);
  -webkit-transform-origin: left;
  -ms-transform-origin: left;
  transform-origin: left;
}

.banner .arrow.btn-prev span:after {
  left: 0;
  top: 0;
  -webkit-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-transform-origin: left;
  -ms-transform-origin: left;
  transform-origin: left;
}

.banner .arrow.btn-next span {
  right: 50%;
  margin-right: -10px;
}

.banner .arrow.btn-next span:before {
  right: 0;
  bottom: 0;
  -webkit-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-transform-origin: right;
  -ms-transform-origin: right;
  transform-origin: right;
}

.banner .arrow.btn-next span:after {
  right: 0;
  top: 0;
  -webkit-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  transform: rotate(-45deg);
  -webkit-transform-origin: right;
  -ms-transform-origin: right;
  transform-origin: right;
}

.banner .arrow:hover span {
  width: 40px;
}

.banner .arrow:hover.btn-prev span {
  margin-left: -20px;
}

.banner .arrow:hover.btn-next span {
  margin-right: -20px;
}

.banner .btn-next {
  right: 2.1%;
}

.banner .btn-prev {
  left: 2.1%;
}


@media all and (max-width:769px){
  .banner{
    display: block;
  }
}