html,
body {
  width: 100%;
  height: 100%;
  background: url('../image/bg3.jpg') no-repeat;
  background-size: cover;
}
h1 {
  width: 100%;
  font-size: 1.5rem;
  color: #fff;
  text-align: center;
  font-weight: 400;
  padding-top: 1rem;
}
.dec_item {
  width: 16.225rem;
  font-family: 'SimHei';
  font-size: 0.6rem;
  font-weight: normal;
  font-stretch: normal;
  line-height: 1.1rem;
  letter-spacing: 0rem;
  color: #fefefe;
}
.dec1 {
  position: absolute;
  left: 45%;
  top: 4rem;
}
.dec2 {
  position: absolute;
  left: 13.6rem;
  top: 12.5rem;
}