body {
  min-width: 1440px;
}
.banner {
  text-align: center;
  color: #FFDF83;
  background-color: #1B1B21;
  height: 400px;
}
.banner .banner-inner {
  width: 1440px;
  position: relative;
  margin: 0 auto;
}
.banner img {
  width: 1440px;
}
.banner .banner-content {
  position: absolute;
  top: 150px;
  left: 250px;
  font-size: 24px;
}
.banner .banner-content > b {
  display: block;
  font-size: 40px;
  margin-bottom: 15px;
}
.title {
  font-size: 40px;
  text-align: center;
  font-weight: bold;
  padding-top: 80px;
}
.title.one {
  margin-bottom: 30px;
}
.content {
  width: 960px;
  margin: 0 auto;
}
.content p + p {
  margin-top: 20px;
}
.content .video {
  width: 960px;
  margin: 70px 0 80px;
}
.course {
  background-color: #FAFAFA;
  text-align: center;
  padding-bottom: 80px;
}
.course .describe {
  margin: 15px 0 76px;
}
.course > img {
  width: 960px;
}
.strength {
  text-align: center;
}
.strength > img {
  width: 1440px;
}