* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, "PingFang SC","Microsoft Yahei", sans-serif;
  -webkit-tap-highlight-color: transparent;
}

img {
  width: 100%;
}

div:focus {
  outline: none;
}

a {
  text-decoration: none;
}

li {
  list-style: none;
}

button {
  border: none;
  outline: none;
}

html, body {
  scroll-behavior: smooth;
}

.head-section {
  position: relative;
  width: 100%;
  height: 98vh;
  display: flex;
  -webkit-box-align: center;
  -moz-box-align: center;
  -webkit-align-items: center;
  align-items: center;
}

.title {
  position: relative;
  max-width: 1280px;
  /* max-height: 956px; */
  padding: 60px 40px;
  margin: 0 auto;
  text-align: center;
  color: #f6f9fc;
  /* background: rgba(100, 41, 41, 0.3); */
  transform: translateY(-80px);
  z-index: 1;
}

.title h1 {
  margin-bottom: 20px;
  font-size: 50px;
  line-height: 62px;
  /* font-weight: 400; */
}

.title h2 {
  max-width: 520px;
  font-size: 22px;
  line-height: 36px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 400;
}

.title button {
  margin-top: 32px;
  padding: 10px 28px;
  background: transparent;
  color: #f6f9fc;
  border: 1px solid #f6f9fc;
  border-radius: 3px;
  transition: .2s;
}

.title button:hover {
  background: rgba(255, 255, 255, 0.08);;
}

.head-section .video-sec {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  overflow: hidden;
  /* height: 100%; */
  z-index: 0;
}

.head-section video {
  width: 100%;
  height: 98vh;
  object-fit: cover;
  /* background: url('./images/sea.jpg'); */
}

.back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.2);
}

/* ==== 正文 ==== */
.section-a {
  width: 100%;
  padding-top: 28px;
  background: rgb(238, 242, 254);
  color: #090821;
}

.section-a-item {
  max-width: 1880px;
  /* width: 100%; */
  padding-top: 42px;
  margin: 0 auto;
  margin-bottom: -4px;
  display: -webkit-flex;
  display: flex;
  column-gap: 10px;
}

.introduce {
  padding: 28px 22px 0 48px;
  width: 100%;
}

.introduce p {
  max-width: 660px;
}

.section-a-item h2 {
  position: relative;
  margin-bottom: 36px;
  line-height: 62px;
  font-size: 40px;
  font-weight: 400;
}

.section-a-item h2 span {
  padding-left: 6px;
  border-left: 4px solid #9f5b5b;
}

/* .section-a-item h2::after {
  content: '';
  width: 2em;
  height: 6px;
  position: relative;
  position: absolute;
  top: 58px;
  left: 4px;
  margin: 0 auto;
  border-radius: 3px;
  background: #9f5b5b;
} */

.section-a-item p {
  margin-bottom: 22px;
  line-height: 28px;
}

.imgs {
  min-width: 46%;
  /* padding: 0 10px; */
}

.imgs img {
  width: 100%;
}

/* section-b 视频对比效果 */
.introduction {
  width: 100%;
  display: flex;
  background: rgb(0, 2, 52);
}

.introduction-video {
  position: relative;
  width: 58%;
  margin:0;
  padding: 0;
}

.introduction-video:hover .full,
.framerrate-video:hover .full {
  display: block;
}

.full {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-align: center;
  background: rgba(0, 0, 0, 0.1);
}

.full i {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  font-size: 42px;
}

.introduction-video video {
  width: 100%;
  height: 100%;
  margin-bottom: -3px;
}

.introduction-article {
  width: 42%;
  padding: 0 80px;
  text-align: center;
  display: flex;
  flex-direction: column;
  /* -webkit-box-align: center;
  -moz-box-align: center;
  -webkit-align-items: center;
  align-items: center; */
  justify-content: center;
  justify-items: center;
  color: #FFF;
}

.introduction-article h2 {
  margin-bottom: 20px;
  line-height: 52px;
  font-size: 36px;
}

.introduction-article p {
  line-height: 32px;
}

.hide {
  display: none;
}

.section-c {
  color: #090821;
}

.framerate {
  width: 100%;
  padding: 52px 20px 82px;
  background: rgb(239, 234, 230);
  /* text-align: center; */
}

.framerate-title {
  max-width: 1280px;
  margin: 0 auto;
  padding: 22px 0 28px;
  line-height: 32px;
}

.framerate-title h2 {
  margin-bottom: 28px;
  font-size: 36px;
  line-height: 52px;
  color: rgb(0, 2, 52);
}

/* .framerate-title p {
  width: 90%;
} */

.framerrate-video {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
}

.framerrate-video video {
  width: 100%;
  height: 100%;
}

.bgc-white {
  background: #fff;
}

.mark {
  width: 100%;
  position: absolute;
  display: flex;
  font-size: 18px;
  color: rgba(255, 255, 255, .6);
  transform: translateY(-32px);
  z-index: 1;
}

.mark span {
  width: 50%;
  padding-left: 12px;
}

.explain {
  max-width: 1280px;
  padding-top: 12px;
  margin: 0 auto;
  color: #aaa;
  line-height: 28px;
}

/*  */
.sec-combine {
  padding: 4em 0;
}

.sec-combine-header {
  max-width: 1280px;
  margin: 0 auto;
  padding: 36px 20px;
  line-height: 32px;
  /* font-size: 18px; */
  position: relative;
  text-align: center;
  border-bottom: 1px dotted rgb(239, 234, 230);
}

.sec-combine-header h3 {
  padding: 20px 0;
  font-size: 22px;
  font-weight: 400;
}

.sec-combine-header i {
  font-size: 42px;
}

.combine-content {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.framerate-title h3 i {
  color: #9f5b5b;
  padding-right: 10px;
}

.framerate-title h3 {
  /* margin-bottom: 18px; */
  font-size: 28px;
  line-height: 48px;
}

/* 产品亮点 */
.section-d {
  background: rgb(239, 234, 230);
}

.small-title {
  max-width: 1280px;
  margin: 0 auto;
  padding: 66px 20px 88px;
  text-align: center;
}

.small-title h2 {
  font-size: 36px;
  line-height: 64px;
  margin-bottom: 42px;
  /* color: #9f5b5b; */
}

.pro-adv {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 36px;
  row-gap: 36px;
}

.pro-adv span {
  display: inline-block;
  line-height: 36px;
  font-size: 20px;
  margin-bottom: 0.4em;
}

.small-title .disc li {
  padding: 12px 0;
  position: relative;
}

.pro-adv article {
  text-align: left;
}

.pro-adv p {
  max-width: 360px;
  margin: 0 auto;
  line-height: 28px;
  color: #666;
}

.pro-adv i {
  font-size: 22px;
  color: #9f5b5b;
  /* color: cadetblue; */
}

/* .section-d article {
  max-width: 1280px;
  padding: 0 20px 64px;
  margin: 0 auto;
  text-align: center;
  font-size: 18px;
  color: #090821;
} */

.head-section video,
.media {
  background-position: center; 
  background-repeat: no-repeat;
}

.media {
  /* background-size: cover; */
  background-size: 100%;
}

.footer {
  padding: 12px;
  background: rgb(0, 2, 52);
}

.footer article {
  max-width: 1280px;
  margin: 0 auto;
  color: #fff;
}

@media (max-width: 1280px) {
  .section-a-item {
    padding-left: 20px;
    padding-right: 22px;
    display: unset;
  }

  .section-a {
    margin-bottom: -21px;
  }

  .bgimage img {
    width: 100%;
  }

}

@media (max-width: 1180px) {
  .pro-adv {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 26px;
    row-gap: 26px;
  }

  .title h1 {
    font-size: 46px;
    /* line-height: 64px; */
  }
  
  .title h2 {
    font-size: 20px;
    /* line-height: 36px; */
  }

  .section-a-item h2  {
    font-size: 38px;
  }

  .section-a-item p {
    width: 72%;
  }

  .section-a-item p:last-child {
    width: 88%;
  }

  .introduction-article {
    width: 40%;
    padding: 0 50px;
  }

  .introduction-video {
    width: 60%;
  }

  .introduction-article h2 {
    font-size: 30px;
    margin: 16px;
    line-height: 48px;
  }

  .framerate-title h2 {
    margin-bottom: 10px;
    font-size: 32px;
  }
  
  .mark {
    font-size: 16px;
  }

  .footer {
    padding: 6px;
  }
  
  .footer article {
    max-width: 1280px;
    margin: 0 auto;
    font-size: 14px;
    color: #fff;
  }
  
}

@media (max-width: 996px) {
  .section-b {
    padding-top: 0;
    background: rgb(0, 2, 41);
  }

  .introduction {
    display: unset;
  }

  .introduction-article {
    width: 100%;
    padding: 62px 0 88px;
  }

  .introduction-video {
    margin: 0 auto;
    width: 100%;
  }

  .introduction .visible {
    display: none;
  }

  .introduction .hide {
    display: block;
  }

  .introduction-article p {
    max-width: 450px;
    padding: 0 16px;
    margin: 0 auto;
  }
}

@media (max-width: 886px) {
  .section-a {
    margin-bottom: -22px;
  }

  .combine-content {
    display: unset;
  }

  .framerate {
    padding-bottom: 62px;
  }
}

@media (max-width: 660px) {
  .title h1 {
    font-size: 42px;
  }

  .title h2 {
    font-size: 18px;
    line-height: 32px;
  }

  .title button {
    margin-top: 22px;
  }

  .introduce {
    padding: 28px 22px 10px;
  }

  .section-a-item h2 {
    font-size: 36px;
  }

  .section-a-item p,
  .section-a-item p:last-child {
    width: 100%;
  }

  .introduction-article h2 {
    font-size: 28px;
    line-height: 42px;
  }

  .introduction-article p {
    line-height: 26px;
    font-size: 14px;
  }

  .combine-content .framerate-title {
    padding: 18px 0;
  }

}

@media (max-width: 460px) {

  .title {
    padding: 0 30px;
  }

  .title h1 {
    margin-bottom: 10px;
    font-size: 36px;
  }

  .title h2 {
    line-height: 30px;
  }

  .section-a-item {
    margin-bottom: -6px;
  }

  .section-a-item h2 {
    font-size: 32px;
    line-height: 52px;
  }

  .introduction-article {
    width: 100%;
    padding: 36px 0 52px;
  }

  .introduction-article h2  {
    margin: 0;
    margin-bottom: 4px;
    padding-left: 10px;
    padding-right: 10px;
    font-size: 22px;
  }

  .introduction-article p {
    line-height: 24px;
    font-size: 12px;
  }

  .section-a {
    margin-bottom: -23px;
  }

  .framerate-title {
    padding: 18px 0;
    line-height: 28px;
  }

  .framerate-title h2 {
    font-size: 26px;
    line-height: 42px;
  }

  .sec-combine {
    padding: 3em 0;
  }

  .sec-combine-header h3 {
    font-size: 20px;
    padding: 16px 0;
  }

  .framerate-video video.small {
    height: 100%;
  }

  .combine-content .framerate {
    padding-top: 42px;
    padding-bottom: 36px;
  }

  .framerate-title h3 {
    font-size: 22px;
    line-height: 32px;
  }

  .mark {
    font-size: 12px;
    transform: translateY(-24px);
  }

  .small-title h2 {
    font-size: 32px;
  }

  .pro-adv {
    grid-template-columns: 1fr;
  }

}

@media (min-width: 1280px) {
  .head-section {
    height: 98vh;
  }

  .head-section video {
    height: 98vh;
  }
}

@media (min-width: 1680px) {

  /* .section-a-item {
    column-gap: 30px;
  } */

  .section-a-item h2  {
    margin-bottom: 48px;
  }

  .section-a-item p {
    font-size: 18px;
    line-height: 30px;
  }

  /* .introduce {
    max-width: 860px;
    padding-left: 80px;
    padding-right: 22px;
  }

  .introduction-article {
    padding: 0 110px;
  } */
}