.banner {
  width: 100%;
  height: 50.5vw;
}
.shutter {
  overflow: hidden;
  width: 100% !important;
  height: 100% !important;
  position: relative;
}
.shutter-img {
  z-index: 1;
}
.shutter-img,
.shutter-img a {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
}
.shutter-img a {
  cursor: default;
}
.shutter-img a > img {
  width: 100%;
  height: 100%;
}
.shutter-img .created {
  overflow: hidden;
  position: absolute;
  z-index: 20;
}
.shutter-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: absolute;
  height: 50px;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  z-index: 1000;
}
.shutter-btn li {
  width: 67px;
  height: 67px;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
  -webkit-transition: 350ms 0s all ease;
  -moz-transition: 350ms 0s all ease;
  -ms-transition: 350ms 0s all ease;
  -o-transition: 350ms 0s all ease;
  transition: 350ms 0s all ease;
}
.shutter-btn li.prev {
  background: rgba(0, 0, 0, 0.2) url(../images/banjt_l.png) no-repeat center;
}
.shutter-btn li.next {
  background: rgba(0, 0, 0, 0.2) url(../images/banjt_r.png) no-repeat center;
}
.shutter-btn li:hover {
  background-color: #003e3b;
}

.ban_text {
  position: absolute;
  top: 45%;
  text-align: center;
  z-index: 999;
  color: #fff;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
}
.ban_text h3 {
  font-size: 6.8rem;
  font-family: alimama;
  text-shadow: 0 3px 3px #525252;
}
.ban_text p {
  font-size: 2rem;
  text-shadow: 0 3px 3px #525252;
}
.ban_des {
  display: block;
  position: absolute;
  bottom: 4%;
  z-index: 999;
  color: #fff;
  text-align: right;
  font-size: 2.3rem;
  font-weight: lighter;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  text-shadow: 3px 0 3px #525252;
}

.bannerdown {
  width: 110px;
  height: 85px;
  position: absolute;
  bottom: 0;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  color: #fff;
  text-align: center;
  z-index: 100;
  background: none;
  cursor: pointer;
}
.bannerdown span {
  font-size: 16px;
  color: #fff;
  display: block;
  width: 100%;
  font-weight: bold;
  position: absolute;
  top: 0;
  left: 0;
}
.bannerdown b {
  position: absolute;
  top: 25px;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -o-transform: translateX(-50%);
  transform: translateX(-50%);
  display: block;
  width: 2px;
  height: 60px;
  background: rgba(255, 255, 255, 0.72);
  -webkit-animation: mybannerdown 3s linear 0s infinite normal;
  -o-animation: mybannerdown 3s linear 0s infinite normal;
  animation: mybannerdown 3s linear 0s infinite normal;
}
@keyframes mybannerdown {
  0% {
    height: 0;
  }
  100% {
    height: 60px;
  }
}
@-webkit-keyframes mybannerdown {
  0% {
    height: 0;
  }
  100% {
    height: 60px;
  }
}