*,
*:before,
*:after {
  box-sizing: border-box;
  text-decoration: none;
}
body {
  margin: 0;
  font-family: "Microsoft YaHei" "Poppins", sans-serif;
  font-size: 62.5%;
  scroll-behavior: smooth;
}
.textcenter{
  text-align: center;
  padding: auto 0;
}
::-webkit-scrollbar {
  width: 0;
}
.circle{
    width:10px;
    height:10px;
    display: inline-block;
    border-radius: 50%;
    background-color: #51bbfe;
}
.container{
  display: flex;
  justify-content: center;
  align-items: center;
}
/* header */

/* pic-jpg */
.pic1{
  font-size: 2rem;
  z-index: 5;
  opacity: 0.9;
  animation-delay: 1.5s;
  position:absolute;
  right: 10%;
  bottom: 30%;
  background-color: rgba(73, 107, 123,1);
  padding: 10px 20px;
  border-radius: 30px;
  color: #fff;
  text-shadow: 2px 2px #fd1755,-2px -1px #2bf2ec, 50px 20px rgba(255, 255, 255, 0.1);
  transition: all 0.5s ease-in-out;
}
.pic1:hover{
  background-color:rgba(255, 255, 255,0) ;
  text-shadow: -2px -2px #fd1755,2px 1px #2bf2ec, 500px 20px rgba(255, 255, 255, 0.5);
}
.pic2{
  width: 1000px;
  height: 1000px;
  position: absolute;
  left: -10%;
  bottom: -40%;
  opacity: 0.9;
  z-index: 5;
  animation-delay: 2s;
  animation: moveUpDown 3s linear infinite;
}
@keyframes moveUpDown {
  0% {
    transform: translateY(0);
  }
  25% {
    transform: translateY(-5px);
  }
  50% {
    transform: translateY(0);
  }
  75% {
    transform: translateY(5px);
  }
  100% {
    transform: translateY(0);
  }
}
.pic3{
  width: 610px;
  height: 512px;
  position: absolute;
  right: -25%;
  bottom: 0;
  opacity: 0.9;
  z-index: 5;
  animation-delay: 2s;
  transition: all 0.3s ease-in-out;
}
.pic3:hover{
  right: -15%;
}
header {
  position: relative;
  height: 100vh;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #192a2e;
}
header .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
header .overlay .title{
  top: 10%;
  margin-left: 15%;
}
header .overlay span {
  z-index: 4;
  margin: 0;
  margin-top: -30%;
  text-align: center;
  font-size: 4rem;
  color: #fff;
  font-weight: 700;
  text-shadow: 2px 2px rgba(0, 0, 255,0.8),-2px -1px rgba(255, 0, 0,0.8), 30px 20px rgba(255, 255, 255, 0.03);
}

/* parallax */
header .parallax {
  position: relative;
  width: 100%;
  height: 100%;
}
header .parallax div {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-position: 0 50%;
  background-repeat: no-repeat;
  background-size: 100%;
}
header .parallax .one {
  background-image: url("../svg/mountains-1.svg");
  z-index: 4;
}
header .parallax .two {
  background-image: url("../svg/mountains-2.svg");
  z-index: 3;
}
header .parallax .three {
  background-image: url("../svg/mountains-3.svg");
  z-index: 2;
}
header .parallax .four {
  background-image: url("../svg/mountains-4.svg");
  z-index: 1;
}
header .parallax .five {
  background-image: url("../svg/mountains-5.svg");
  z-index: 0;
}


/* scroll-down */
.scroll-down {
  z-index: 5;
  position: absolute;
  bottom: 5%;
  left: 70%;
  transform: translateX(-50%);
  font-size: 1.2rem;
  color: #fff;
  animation: blink 1s infinite;
  transition: all 0.2s ease;
}
.scroll-down:hover{
  margin-bottom: 10px;
  cursor: pointer;
}

@keyframes blink {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
/* link-info */