.banner {
  width: 100vw;
  height: 580px;
  background: url('../img/banner.png') 100% 100% no-repeat;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.banner .banner_title {
  text-align: center;
  height: 61px;
  line-height: 61px;
  font-size: 46px;
  font-weight: bold;
  color: #FFFFFF;
  margin-top: 260px;
}
.banner .banner_text {
  text-align: center;
  height: 21px;
  line-height: 21px;
  font-size: 16px;
  font-weight: 400;
  color: #FFFFFF;
  margin-top: 26px;
}
.sdkFile {
  width: 1200px;
  margin: auto;
}
.sdkFile .sdk_title {
  margin-top: 80px;
  text-align: center;
  height: 26px;
  line-height: 26px;
  font-size: 26px;
  font-weight: 400;
  color: #3F4E5B;
  opacity: 1;
}
.sdkFile .sdk_list {
  display: flex;
  justify-content: space-between;
  flex-wrap: nowrap;
  margin-top: 60px;
  margin-bottom: 100px;
}
.sdkFile .sdk_list .sdk_item {
  width: 208px;
  height: 186px;
  text-align: center;
}
.sdkFile .sdk_list .sdk_item .picture {
  width: 80px;
  height: 80px;
  margin: auto;
}
.sdkFile .sdk_list .sdk_item .picture img {
  width: 100%;
  height: 100%;
}
.sdkFile .sdk_list .sdk_item .word {
  height: 18px;
  font-size: 18px;
  font-weight: bold;
  line-height: 18px;
  color: #3A434B;
  margin-top: 23px;
}
.sdkFile .sdk_list .sdk_item .btn {
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 124px;
  height: 40px;
  border: 1px solid #EAECEF;
  border-radius: 4px;
  color: #646F7D;
  font-size: 14px;
  margin-top: 25px;
  transition: 0.3s;
}
.sdkFile .sdk_list .sdk_item .btn:hover {
  transition: 0.3s;
  cursor: pointer;
  color: #E53333;
  border: 1px solid #E53333;
}
.sdkFile .sdk_list .sdk_item .btn1 {
  margin: auto;
  display: flex;
  align-items: center;
  width: 180px;
  height: 40px;
  border: 1px solid #EAECEF;
  border-radius: 4px;
  color: #646F7D;
  font-size: 14px;
  margin-top: 25px;
  transition: 0.3s;
  box-sizing: border-box;
}
.sdkFile .sdk_list .sdk_item .btn1:hover {
  transition: 0.3s;
  cursor: pointer;
  color: #E53333;
  border: 1px solid #E53333;
}
.sdkFile .sdk_list .sdk_item .btn1:hover .android img {
  content: url('https://static-1.talk-fun.com/talklfun_index/pc/sdkDownload/img/Android1.svg');
}
.sdkFile .sdk_list .sdk_item .btn1:hover .apple img {
  content: url('../img/iOS.png');
}
.sdkFile .sdk_list .sdk_item .btn1 .android,
.sdkFile .sdk_list .sdk_item .btn1 .apple {
  display: flex;
  align-items: center;
  height: 20px;
  color: #646F7D;
}
.sdkFile .sdk_list .sdk_item .btn1 .android img,
.sdkFile .sdk_list .sdk_item .btn1 .apple img {
  width: 20px;
  height: 20px;
  margin-left: 20px;
  margin-right: 6px;
}
.sdkFile .sdk_list .sdk_item .btn1 .android {
  padding-right: 15px;
  border-right: 1px solid #E1E5E9;
}
.sdkFile .sdk_list .sdk_item .btn1 .apple img {
  margin-left: 15px;
}
.cloud {
  width: 950px;
  margin: auto;
  margin-bottom: 140px;
}
.cloud .cloud_title {
  text-align: center;
  height: 26px;
  line-height: 26px;
  font-size: 26px;
  font-weight: 400;
  color: #3F4E5B;
}
.cloud .cloud_cont {
  position: relative;
  margin-top: 60px;
  display: flex;
  justify-content: space-between;
}
.cloud .cloud_cont .cloud_item {
  width: 464px;
}
.cloud .cloud_cont .cloud_item:nth-child(1) .context a:nth-child(3) {
  position: absolute;
  bottom: 15%;
  right: 9%;
  color: #3691ff;
}
.cloud .cloud_cont .cloud_item .img {
  width: 464px;
  height: 276px;
  background: #E2EFFF;
}
.cloud .cloud_cont .cloud_item .img img {
  width: 100%;
  height: 100%;
}
.cloud .cloud_cont .cloud_item .context {
  position: relative;
  width: 464px;
  height: 166px;
  border: 1px solid #EAECEF;
}
.cloud .cloud_cont .cloud_item .context .text {
  margin: auto;
  text-align: center;
  height: 24px;
  font-size: 24px;
  font-weight: bold;
  line-height: 24px;
  color: #3F4E5B;
  margin-top: 35px;
}
.cloud .cloud_cont .cloud_item .context .download {
  margin: auto;
  width: 150px;
  height: 50px;
  line-height: 50px;
  background: #E53333;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-top: 27px;
  margin-bottom: 20px;
}
.cloud .cloud_cont .cloud_item .context .download img {
  width: 26px;
  height: 26px;
  margin-right: 10px;
}
.version {
  position: sticky;
  bottom: 0px;
  width: 100vw;
  height: 100px;
  background: #2B313A;
  margin: auto;
  color: #FFFFFF;
}
.version .version_cont {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin: auto;
  height: 100%;
  overflow: hidden;
}
.version .version_cont .top {
  margin-top: 26px;
}
.version .version_cont .top span {
  font-size: 14px;
  opacity: 0.8;
}
.version .version_cont .bottom {
  font-size: 14px;
  display: flex;
  margin-top: 15px;
}
.version .version_cont .bottom a {
  color: #fff;
  opacity: 0.8;
}
.version .version_cont .bottom .agreement {
  position: relative;
  margin-right: 29px;
}
.version .version_cont .bottom .agreement:after {
  position: absolute;
  margin-left: 14px;
  margin-top: 3px;
  content: '';
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.3);
}