@charset "utf-8";

* {
  margin: 0;
  padding: 0;
}
html,
body {
  color: #000;
  font-family: Helvetica Neue, PingFang SC, Microsoft YaHei, Helvetica, Arial,
    sans-serif;
  height: 100%;
}
a {
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
a:any-link {
  color: unset;
}
ul,
li {
  list-style: none;
}
img {
  width: 100%;
}
.img-line {
  line-height: 0;
}

.main {
  padding: 0 2.4rem;
}
.top-container {
  background: url(./images/bg.webp) no-repeat;
  background-size: cover;
  position: relative;
  height: 14.27rem;
}

.nav-bar {
  position: absolute;
  font-size: 0.16rem;
  color: #fff;
  display: flex;
  font-weight: bold;
  align-items: center;
  padding: 0.16rem 0;
}

.nav-bar img {
  width: 0.4rem;
  margin-right: 0.11rem;
}

.flex-between-center {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-banner {
  color: #fff;
  padding-top: 0.55rem;
  display: flex;
  flex-direction: column;
}

.banner-left h1 {
  font-weight: bold;
  font-size: 0.56rem;
  color: #ffffff;
  margin: 0.8rem 0 0.2rem;
  text-align: center;
}

.banner-left p {
  font-weight: 500;
  font-size: 0.24rem;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

.banner-left .pic {
  width: 9rem;
  height: 9rem;
}

.download-btn {
  width: 2.5rem;
  display: block;
  margin: 0.54rem auto 0.2rem;
}

.block-wrapper {
  display: flex;
  flex-wrap: wrap;
}

.block-wrapper .item {
  background-color: #171c3b;
  width: 50%;
  height: 9rem;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.block-wrapper .item .title {
  font-weight: bold;
  font-size: 0.72rem;
  color: #ffffff;
  text-align: center;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8.73rem;
  z-index: 1;
  transition: all 0.5s ease-in-out;
}
.block-wrapper .item .img1 {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: all 0.5s ease-in-out;
}

.block-wrapper .item .img2 {
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: all 0.5s ease-in-out;
}

.block-wrapper .item:hover .title {
  top: 0.7rem;
  font-weight: bold;
  font-size: 0.56rem;
}

.block-wrapper .item:hover .img1 {
  opacity: 0;
}

.block-wrapper .item:hover .img2 {
  opacity: 1;
}

.block-wrapper .item:nth-of-type(1) .img2 {
  width: 8rem;
  height: 5rem;
}
.block-wrapper .item:nth-of-type(2) .img2 {
  width: 6.3rem;
  height: 6.3rem;
}
.block-wrapper .item:nth-of-type(3) .img2 {
  width: 8rem;
  height: 6.4rem;
}
.block-wrapper .item:nth-of-type(4) .img2 {
  width: 8rem;
  height: 6.1rem;
}

footer {
  height: 1rem;
  background-color: #000100;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 400;
  font-size: 0.18rem;
  color: #ffffff;
  text-align: center;
  font-style: normal;
  text-decoration-line: underline;
  text-transform: none;
}