#banner {
  width: 100%;
  height: 445px;
  background-color: #000000;
  background-size: cover;
}
#banner img {
  display: block;
  width: 1920px;
  height: 100%;
}
.nav-select {
  cursor: pointer;
}
.banner-box {
  position: absolute;
  width: 100%;
  height: 445px;
  background-size: auto 100%;
  background-repeat: no-repeat;
  background-position: center;
}
#banner .banner-inner {
  position: relative;
  width: 1260px;
  height: 100%;
  margin: 0 auto;
}
.flex-cc {
  display: flex;
  align-items: center;
  justify-content: center;
}
#banner strong {
  position: absolute;
  top: 205px;
  line-height: 48px;
  font-weight: 400;
  color: white;
}
#banner strong h1 {
  font-size: 36px;
  font-weight: 400;
}
#banner strong .strong-content {
  padding-top: 8px;
  font-size: 16px;
  line-height: 24px;
}
@media screen and (max-width: 1440px) {
  #banner .banner-inner {
    position: relative;
    width: 960px;
    height: 100%;
    margin: 0 auto;
  }
}
@media screen and (max-width: 768px) {
  #banner {
    width: 100%;
    height: 100vw;
    background-size: cover;
  }
  #banner .banner-inner {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0 auto;
  }
  .flex-cc {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  #banner strong {
    position: absolute;
    top: 120px;
    line-height: 48px;
    font-weight: 400;
    color: white;
  }
  #banner strong h1 {
    padding: 0 12px;
    font-size: 29px;
    line-height: 29px;
    font-weight: 400;
  }
  #banner strong .strong-content {
    padding: 0 12px;
    padding-top: 25px;
    font-size: 15px;
    line-height: 29px;
  }
}