* {
  margin: 0;
  padding: 0;
}
body {
  height: 100%;
}

/* -----------------头部区域 */
header {
  position: relative;
}
nav {
  height: 2.5rem;
  width: 92%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 1.5625rem;
  left: 4%;
  z-index: 9999;
  color: #fcfcfc;
}

/*  ---------------------导航栏左侧 */
nav .left {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  height: 2.5rem;
}
.left h1 img {
  display: inline-block;
  width: 2.125rem;
  height: 2.125rem;
}
.left span {
  display: inline-block;
  padding-left: 0.3rem;
  font-size: 1.325rem;
  margin-bottom: 0.35rem;
}
/* .left p{
  font-size: .625rem;
  letter-spacing:.375rem;
  margin-top: 2px;
} */

/* -----------------------导航栏右侧 */
nav .right-menu {
  display: flex;
  /* justify-content: right; */
}
.right-menu .menu-item {
  font-size: 1.25rem;
  text-shadow: 0.125rem 0.125rem 0.0625rem rgba(0, 0, 0, 0.2);
  margin-left: 1.25rem;
  text-decoration: none;
  color: white;
}

/* -------------------主要区域 */
.logoImg {
  border-radius: 8px;
}

main {
  height: 100%;
}
main section {
  display: block;
  /* border: .0625rem solid black; */
  width: 100%;
  height: 100vh;
  background-color: rgb(60, 60, 60);
}
main section:nth-child(5n) {
  height: 37.5rem;
}
section .background {
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-size: cover; /* 确保背景图片覆盖整个区域 */
}

/*------------------- section1区域 */
.section1 {
  position: relative;
  width: 100%; /* 或者具体宽度 */
  height: 100vh; /* 或者具体高度 */
}
.section1 .text {
  width: 100%;
  position: absolute;
  top: 44%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.section1 .tittle {
  color: #fff;
  text-align: center;
  text-shadow: 0.13rem 0.13rem 0.08rem rgba(0, 0, 0, 0.2);
}
.section1 .tittle h1 {
  font-size: 2.5rem;
}
.section1 .tittle .subtitle {
  width: 100%;
  display: flex;
  margin: 2.5rem auto;
  justify-content: center;
}
.subtitle span {
  font-weight: 200;
  width: 5rem;
  height: 1rem;
  font-size: 1rem;
  border-right: 0.125rem solid #fcfcfc;
  text-align: center;
  line-height: 1rem;
}
.subtitle span:nth-child(4n) {
  border-right: none;
}
.section1 .btns {
  position: absolute;
  left: 50%;
  top: 70%;
  transform: translate(-50%, -50%);
  width: 60%;
  height: 40%;
  display: flex;
  justify-content: center;
  margin-top: 2.5rem;
}

.btn {
  color: #fcfcfc;
  border: 0.0625rem solid rgba(252, 252, 252);
  background-color: rgba(0, 0, 0, 0.2);
  padding: 0.3125rem 0.625rem;
  width: 10rem;
  height: 3.4375rem;
  border-radius: 0.625rem;
  display: flex;
  justify-content: space-between; /* 左右两端对齐 */
  align-items: center; /* 垂直居中对齐 */
}
.section1 .imgs {
  position: absolute;
  left: 50%;
  top: 88%;
  transform: translate(-50%, -50%);
  width: 34%;
  height: 40%;
  display: flex;
  justify-content: space-between; /* 左右两端对齐 */
  margin-top: 2.5rem;
}
.IosDownload,
.AnDownload {
  width: 8.75rem;
  height: 8.75rem;
  align-items: center; /* 垂直居中对齐 */
}

@media screen and (max-width: 700px) {
  .section1 .imgs {
    display: none;
  }
}
.section1 .background {
  width: 100%;
  height: 100%; /* 确保背景容器占据一屏高度 */
  object-fit: cover;
}
.background .video-background {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  object-fit: cover; /* 保持视频的宽高比并覆盖整个容器 */
}

/* 默认情况下显示视频 */
.section1 .background video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 默认情况下隐藏图片 */
.section1 .background img {
  display: none;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 当视口宽度小于或等于 700px 时，隐藏视频并显示图片 */
@media screen and (max-width: 700px) {
  .section1 .background video {
    display: none;
  }
  .section1 .background img {
    display: block;
  }
}

.btn:nth-child(1) {
  margin-right: 4rem;
}

.btn i {
  font-size: 2.3rem;
}

.btn p {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
}
.btn span {
  font-size: 1.5rem;
}

.btn .text-container {
  display: flex;
  flex-direction: column; /* 垂直排列 */
  align-items: flex-start; /* 左侧对齐 */
}

/* ------------------- section2区域 */
.section2 {
  position: relative;
  width: 100%;
  height: 100vh;
}
.section2 .background {
  background-image: url("../imges/section2.jpg");
  background-size: cover;
  background-position: center;
}
@media screen and (max-width: 700px) {
  .section2 .background {
    background-image: url("../imges/section2-m.jpg");
  }
}
.section2 .tittle {
  position: absolute;
  height: 100%;
  top: 20%;
  left: 6%;
  text-align: left;
  color: #fcfcfc;
}
.section2 .tittle h1 {
  font-size: 2.725rem;
}
.section2 .tittle p {
  margin-top: 1.5625rem;
  font-size: 1.675rem;
}
.section2 .tittle span {
  display: block;
  font-size: 1rem;
  margin-top: 0.625rem;
}

/* -------------------section3区域 */
.section3 {
  position: relative;
}
.section3 .tittle {
  position: absolute;
  top: 20%;
  left: 6%;
  text-align: left;
  color: #fcfcfc;
}
.section3 .tittle h1 {
  font-size: 2.725rem;
}
.section3 .tittle p {
  margin-top: 1.5625rem;
  font-size: 1.675rem;
}
.section3 .tittle span {
  display: block;
  font-size: 1rem;
  margin-top: 0.625rem;
}
.section3 .background {
  background-image: url("../imges/img3.jpg");
  background-size: cover;
  background-position: center;
}
@media screen and (max-width: 700px) {
  .section3 .background {
    background-image: url("../imges/img3-m.jpg");
  }
}

/* -------------------section4区域 */
.section4 {
  position: relative;
  /* height: 100vh; 确保section4至少占满整个视口高度 */
}
.section4 .tittle {
  position: absolute;
  top: 16%;
  right: 6%;
  text-align: right;
  color: #fcfcfc;
}
.section4 .tittle h1 {
  font-size: 2.725rem;
}
.section4 .tittle p {
  margin-top: 1.5625rem;
  font-size: 1.675rem;
}
.section4 .tittle span {
  display: block;
  font-size: 1rem;
  margin-top: 0.625rem;
}
.section4 .background {
  background-image: url("../imges/image.png");
}
@media screen and (max-width: 700px) {
  .section4 .background {
    background-image: url("../imges/image-m.png");
  }
}

/* ----------------主要区域 底部文字 */
.section5 {
  width: 100%; /* 或者具体宽度 */
  height: 6rem; /* 或者具体高度 */
  overflow: hidden; /* 防止内容溢出 */
  /* border: 2px solid red; */
  position: absolute;
  bottom: 0.0625rem;
  left: 0;
}
.main-content {
  width: 100%;
  position: relative;
}
.main-content .shadowbox {
  width: 100%;
  height: 6rem;
  background-color: rgba(0, 0, 0, 0.7);
}
.content {
  position: absolute;
  left: 50%;
  top: 1.25rem;
  transform: translate(-50%, -50%);
  width: 70%;
  /* height: 13.75rem; */
}
.content div {
  height: 1rem;
  text-align: center;
  color: white;
  font-size: 0.75rem;
}
.content .beian {
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
}

.beian a {
  margin: 0 5px;
  /* 给链接之间添加一些间距 */
}

.content .box1 {
  margin-top: 3rem;
}

.content .box {
  display: flex;
  justify-content: center;
  align-items: center;
}
.box .pic img {
  width: 1.6rem;
  height: 1.6rem;
  margin-right: 0.425rem;
}
.content .beian a {
  text-decoration: underline;
  color: white;
}

.text-content .sTitle {
  margin-top: 0.3rem;
}
.content .link {
  margin: 0 auto;
  display: flex;
  justify-content: center;
}
.content .link a {
  color: white;
  margin-right: 10px;
}

.content .link a:last-child {
  margin-right: 0px;
}

/* -------------------底部区域 */
/* footer{
  position: relative;

}
footer .ShadowBox{
  position: fixed;
  z-index: 9999;
  height: 3.1625rem;
  width: 100%;
  bottom: 0;
  color: #fcfcfc;
  display: flex;
  justify-content: center; 
  align-items: center; 
  background-color: rgba(0, 0, 0, 0.3);
}
.ShadowBox .box{
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 5px;
}
.ShadowBox .pic img{
  width: 2.65rem;
  height: 2.65rem;
  margin-right: .425rem;
}

.text-content p{
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 5px;
} */

/* 动画 */
/* 初始隐藏 dh 类元素 */
.dh {
  /* 修改 */
  opacity: 1;
  transform: translateY(1.25rem);
}
/* 定义动画关键帧 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(2.5rem); /* 从下方1.25rem开始 */
  }
  to {
    opacity: 1;
    transform: translateY(0); /* 移动到原始位置 */
  }
}
/* 应用动画到 section 元素 */
.animate {
  animation: fadeInUp 0.8s ease-in-out forwards;
}
/* 确保 section 有足够的高度以便滚动 */
main section .background {
  height: 100vh; /* 每个 section 占据一屏高度 */
}