html,
body,
ul {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
ul {
  list-style: none;
}
a {
  /* color: #000000; */
  text-decoration: none;
}
.markdown p {
  text-align: justify;
}
.markdown p img {
  display: block;
  margin: auto;
}
html,
body,
.container {
  height: 100%;
  font-family: 'roboto,sans-serif';
}
canvas {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
}

.w-1500 {
  margin: 0 auto;
  width: 76%;
}
.container {
  position: relative;
  overflow: hidden;
  background-color: #000000;
}
.container .bg-img {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.header-nav {
  position: fixed;
  width: 100%;
  left: 0;
  top: 0;
  z-index: 99;
  background: #000000;
}
.header-nav .w-1500 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}
.header-nav .logo-img {
  line-height: 0;
  cursor: pointer;
}
.header-nav .logo-img img {
  height: 60px;
}
.header-nav .ul-nav {
  display: flex;
  align-items: center;
}

/* .header-nav .ul-nav li {
  margin-right: 50px;
  height: 64px;
}
.header-nav .ul-nav li > a {
  color: #999999;
  font-size: 16px;
  height: 64px;
  display: inline-block;
  line-height: 64px;
}
.header-nav .ul-nav li > a:hover {
  color: white;
} */
.header-nav .ul-nav li.first-li {
  position: relative;
}

.header-nav .ul-nav li.first-li {
  margin-right: 50px;
  height: 64px;
}
.header-nav .ul-nav li.first-li > a {
  color: #999999;
  font-size: 16px;
  height: 64px;
  display: inline-block;
  line-height: 64px;
}
.header-nav .ul-nav li.first-li > a:hover {
  color: white;
}
.header-nav .ul-nav .first-li {
  position: relative;
}
.header-nav .ul-nav .first-li .second-ul {
  position: absolute;
  left: 0;
  top: 60px;
  background: #28282a;
  border-radius: 8px;
  padding: 5px 0;
  display: none;
}
.header-nav .ul-nav .first-li .second-ul .second-li a {
  color: white;
  padding: 6px 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.header-nav .ul-nav .first-li .second-ul .second-li .img-logo {
  width: 14px;
  height: 14px;
  margin-right: 5px;
  margin-top: 2px;
}
.header-nav .btn-box {
  position: relative;
  height: 64px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.header-nav .btn-box .btn-use {
  width: 120px;
  height: 40px;
  border: 1px solid white;
  color: white;
  border-radius: 10px;
  text-align: center;
  line-height: 40px;
  cursor: pointer;
  font-weight: 500;
  font-size: 16px;
}
.header-nav .btn-box .menu-ul {
  position: absolute;
  width: 100%;
  left: 0;
  top: 60px;
  background: #28282a;
  border-radius: 8px;
  padding: 5px 0;
  display: none;
}
.header-nav .btn-box .menu-ul .menu-li a {
  color: white;
  padding: 6px 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
}
.container .content {
  height: 100%;
  position: relative;
  z-index: 9;
}
.container .content .w-1500 {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 30px;
  height: 100%;
}
.container .content .w-1500 .left {
  width: 50%;
  position: relative;
  padding-left: 10px;
  top: -50px;
}
.container .content .w-1500 .left p {
  font-size: 52px;
  line-height: 66px;
  font-weight: bold;
  color: white;
  position: relative;
  width: 130%;
}
.container .content .w-1500 .left .tips {
  position: relative;
  width: 110%;
  font-size: 16px;
  font-weight: 500;
  color: white;
  line-height: 28px;
  margin-top: 50px;
}
.container .content .w-1500 .left .btn {
  width: 223px;
  height: 60px;
  text-align: center;
  line-height: 60px;
  border-radius: 8px;
  color: #000000;
  font-weight: bold;
  background: #b2ee51;
  cursor: pointer;
  margin-top: 90px;
}
.container .content .w-1500 .left .btn a {
  font-size: 24px;
  color: #000000;
}
.container .content .w-1500 .left .btn:hover,
.container .content .w-1500 .left .btn:hover a {
  opacity: 0.7;
}
.container .content .w-1500 .right {
  width: 50%;
  position: relative;
  top: -70px;
  left: -20px;
}
.container .content .w-1500 .right img {
  position: absolute;
  left: 20%;
  top: 0;
  bottom: 0;
  right: 0;
  margin: auto;
  z-index: 999;
}
.article-title {
  margin-bottom: 30px;
  text-align: center;
  font-size: 22px;
  font-weight: 600;
}

.container .content .w-1500 .right .black-img {
  width: 45%;
}
.container .content .w-1500 .right .img1 {
  width: 90%;
  animation: imgRote 20s linear infinite;
}
.container .content .w-1500 .right .img2 {
  width: 75%;
  animation: imgRote 20s linear infinite;
  opacity: 0.6;
}
.container .content .w-1500 .right .img3 {
  width: 60%;
  animation: imgRote 20s linear infinite;
  opacity: 0.5;
}
.container .content .w-1500 .right .img4 {
  width: 40%;
}

@keyframes imgRote {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@media screen and (max-width: 56rem) {
  .article-title {
    display: none;
  }
}