body {
  width: 100%;
  height: 100%;
  background: url(https://cdn-file.tjsptech.com/web2/dali/images/index_bg-4044d5d3c4.png) top center no-repeat;
  background-size: 1920px 1080px;
  position: relative;
}
.main {
  width: 916px;
  margin: 0 auto;
}
.main .logo {
  margin-top: 24px;
  width: 169px;
  height: 40px;
  background: url(https://cdn-file.tjsptech.com/web2/dali/images/index_logo-3f49b9ed6e.png) no-repeat;
}
.main .section1 {
  margin-top: 100px;
  height: 327px;
}
.main .section1 .left {
  float: left;
}
.main .section1 .left .title {
  margin-top: 43px;
  width: 366px;
  height: 60px;
  background: url(https://cdn-file.tjsptech.com/web2/dali/images/index_title-25e951361e.png) no-repeat;
}
.main .section1 .left .desc {
  margin-top: 48px;
  line-height: 26px;
  font-size: 20px;
  color: #666;
}
.main .section1 .left .download {
  margin-top: 48px;
  width: 240px;
  height: 72px;
  background: url(https://cdn-file.tjsptech.com/web2/dali/images/index_down-dcd2abb391.png) no-repeat;
  text-align: center;
  line-height: 72px;
  font-size: 24px;
  cursor: pointer;
  color: #fff;
}
.main .section1 .left .download:hover {
  background-position-x: -240px;
}
.main .section1 .left .ver {
  margin-top: 20px;
  height: 20px;
  color: #666;
  font-size: 14px;
}
.main .section1 .left .ver p {
  float: left;
}
.main .section1 .left .ver .time {
  margin-left: 40px;
}
.main .section1 img {
  float: right;
  width: 442px;
  height: 327px;
}
.main .section2 {
  margin-top: 100px;
  height: 215px;
}
.main .section2 img {
  width: 240px;
  height: 215px;
  float: left;
  margin-right: 90px;
}
.main .section2 .mr0 {
  margin-right: 0;
}
footer {
  margin: 40px auto 20px;
}
footer p {
  color: #333;
  height: 16px;
  font-size: 12px;
  margin-top: 10px;
  text-align: center;
}