/* ===== 基础重置 ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  width: 100%;
  min-height: 100vh;
  background: #fff;
}

img {
  max-width: 100%;
  pointer-events: none;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ===== 布局容器 ===== */
#root,
.homeContainer {
  position: relative;
}

.homeContainer {
  background: #fff;
}

.page-home {
  position: relative;
  min-width: 1280px;
  width: 100%;
  background: linear-gradient(
    180deg,
    rgba(172, 221, 255, 0.7),
    hsla(0, 0%, 100%, 0.7) 50%
  );
  background-size: 100% 1280px;
  background-repeat: no-repeat;
}

/* ===== 顶部导航 ===== */
.header {
  position: absolute;
  z-index: 10;
  width: 100%;
}

.header-nav {
  width: 100%;
  min-width: 1200px;
  padding-top: 4px;
}

.header-nav-wrap {
  height: 48px;
  width: 70%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  margin-top: 30px;
}

/* ===== 主标题区域 ===== */
h1 {
  text-align: center;
  font-size: 52px;
  padding-top: 100px;
  margin-bottom: -50px;
  color: #000;
}

.first-screen {
  position: relative;
  max-width: 1440px;
  min-width: 1280px;
  margin: 0 auto;
  padding-top: 80px;
  background: url(https://img.alicdn.com/imgextra/i1/O1CN01czEOIb1u1yeJp5E8y_!!6000000005978-2-tps-2048-2560.png)
    center 4px/1440px 1280px no-repeat;
}

.first-screen-wrap {
  width: 174px;
  height: 55px;
  margin: 13px auto 0;
  cursor: pointer;
  transition: transform 0.3s ease;
  position: relative;
}

.first-screen-img,
.first-screen-img-hover {
  width: 100%;
  height: 100%;
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}

.first-screen-img-hover {
  opacity: 0;
  z-index: 2;
}

.first-screen-wrap:hover {
  transform: scale(1.1);
}

.first-screen-wrap:hover .first-screen-img {
  opacity: 0;
}

.first-screen-wrap:hover .first-screen-img-hover {
  opacity: 1;
}

.first-screen-big-pic-view {
  position: relative;
  max-width: 1138px;
  margin: 39px auto 0;
}

.big-pic-slide {
  width: 1138px;
  height: 712px;
}

.big-pic {
  width: 100%;
  height: auto;
}

/* ===== 功能展示区块 ===== */
.other-screen {
  width: 100%;
  position: relative;
}

.other-screen-container {
  position: relative;
  max-width: 1440px;
  min-width: 1280px;
  margin: 0 auto;
}

.other-screen-container-view {
  width: 1280px;
  margin: 0 auto;
}

.selling-point-item {
  width: 1140px;
  margin: 58px auto 0;
  height: 540px;
  display: flex;
  background: linear-gradient(270deg, #f8fafd, #f7fafd);
  border: 1px solid rgba(9, 30, 54, 0.06);
  border-radius: 18px;
}

.selling-point-item.right {
  flex-direction: row-reverse;
}

.selling-point-title-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-left: 80px;
}

.selling-point-item.right .selling-point-title-view {
  margin-left: 0;
  margin-right: 80px;
}

.selling-point-title-view .title {
  margin-top: 120px;
  font-size: 38px;
  color: #1f2026;
  font-weight: 500;
}

.selling-point-title-view .summary {
  max-width: 315px;
  margin-top: 12px;
  font-size: 18px;
  color: #4c4c4c;
  font-weight: 200;
  line-height: 1.6;
}

.selling-point-title-view .button-wrap {
  margin-top: auto;
  margin-bottom: 147px;
  width: 142px;
  height: 45px;
}

.selling-point-title-view .button {
  cursor: pointer;
  width: 100%;
  height: 100%;
  background: url(https://img.alicdn.com/imgextra/i4/O1CN013xVabU1uADmM5HUSz_!!6000000005996-2-tps-284-90.png)
    no-repeat center/contain;
  transition: transform 0.3s ease;
}

.selling-point-title-view .button:hover {
  transform: translateY(-5px);
  background-image: url(https://img.alicdn.com/imgextra/i3/O1CN01ihdPaI1KJXfiiXGOj_!!6000000001143-2-tps-284-90.png);
}

.selling-point-video-view {
  width: 570px;
  height: 400px;
  margin: 60px 80px 0;
  box-shadow: 0 28px 53px rgba(15, 22, 74, 0.12);
  border-radius: 16px;
  overflow: hidden;
}

.selling-point-video-view .video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 底部下载区域 ===== */
.start-quark {
  display: flex;
  flex-direction: column;
  align-items: center;
  /*margin-top: 138px;*/
}

.start-quark-text {
  width: 480px;
  height: 64px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.start-quark-img {
  width: 185px;
  height: 59px;
  margin-top: 22px;
  position: relative;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.start-quark-img:hover {
  transform: scale(1.1);
}

/* ===== 页脚 ===== */
.footer {
  position: relative;
  padding: 42px 10px 0 31px;
  height: 89px;
  min-width: 1280px;
  margin: 20px auto 48px;
  border-top: 2px solid #e9e9e9;
}

.copy {
  text-align: center;
  font-size: 13px;
  color: #999;
  margin-bottom: 25px;
}

.copy a {
  color: #999;
  margin: 0 8px;
}

.copy a:hover {
  color: #333;
}

/* ===== 响应式隐藏 ===== */
@media screen and (max-width: 820px) {
  .page-home {
    display: none;
  }
}