@charset "UTF-8";

*{ margin:0 ; padding:0;}
.i-ban {
  position: relative;
  overflow: hidden;
  width: 100%;
  z-index: 1;
  height: 800px;
}
.i-ban ul, .i-ban li {
  width: 100%;
  height: 100%;
}
.i-ban li {
  background-size: cover !important;
  position: absolute;
  left: 100%;
  top: 0;
  overflow: hidden;
}
.i-ban li a{
  display: block;
  width: 100%;
  height: 100%;
}
.cent-cont {
  position: absolute;
  left: 50%;
  top: 110%;
  margin-top: -240px;
  color: #fff;
  z-index: 3;
}

.word {
  color: #fff;
  font-size: 50px;
  line-height: 68px;
}
.word p {
  position: relative;
  overflow: hidden;
  height: 68px;
}
.i-ban li .word p .font-sign {
  position: relative;
  display: block;
  top: 20px;
  opacity: 0;
  filter: alpha(opacity=0);
}
.i-ban li .word span.line {
  display: block;
  height: 4px;
  background-color: #fff;
  opacity: 0.7;
  filter: alpha(opacity=70);
  width: 0;
  position: absolute;
  left: 0;
  top: 50%;
  margin-top: -2px;
}
.i-ban li .word .font {
  display: block;
  position: relative;
  top: 20px;
  opacity: 0;
  filter: alpha(opacity=0);
}
.link {
  display: block;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  margin-top: 50px;
  transition: all 0.3s ease 0s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  opacity: 0;
  filter: alpha(opacity=0);
}
.link i {
  display: block;
  width: 100%;
  height: 100%;
  background: url(../images/ico_16.png) no-repeat center;
  position: absolute;
  left: 0;
  top: 0;
}
.link:hover {
  border: 1px solid white;
}
.active .word p .font-sign {
  top: 0;
  opacity: 1;
  filter: alpha(opacity=100);
  transform: rotate(0);
  transition: all 0.5s ease 0s;
}
.link {
  opacity: 1;
  filter: alpha(opacity=1);
  transition: all 0.3s ease 0.6s;
}
.link i {
  animation: downico 1.5s ease-out infinite;
}
.i-ban .btns {
  position: absolute;
  bottom: 76px;
  left: 10.5%;
  z-index: 10;
}
.i-ban .btns span {
  display: inline-block;
  width: 50px;
  height: 2px;
  margin-right: 10px;
  background-color: #3a333f;
  position: relative;
  cursor: pointer;
}
.i-ban .btns span i {
  display: block;
  height: 100%;
  position: absolute;
  width: 0;
  background-color: #918c94;
}


@keyframes downico {
  0% {
    top: 0;
    opacity: 1;
  }
  35% {
    top: 50%;
    opacity: 0;
  }
  65% {
    top: -50%;
    opacity: 0;
  }
  100% {
    top: 0;
    opacity: 1;
  }
}