body, html{
  height: 100%;
  margin: 0;
}

.main{
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  height: 100%;
}

.pc_sub_content{
  color: white;
  position: absolute;
  top: 120px;
  bottom: 50px;
  z-index: 2;
  width: 100%;
  text-align: center;
  overflow-x:auto;
}

.mobile_sub_content{
  color: white;
  position: absolute;
  top: 50px;
  bottom: 50px;
  z-index: 2;
  width: 100%;
  text-align: center;
  overflow-x:auto;
}

.pdf-preview{
  box-sizing: border-box;
  width: 60vw;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 0 18px;
  text-align: center;
}

.pdf-preview iframe,
.pdf-preview embed,
.pdf-preview img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.pdf-preview iframe,
.pdf-preview embed{
  height: 65vh;
  min-height: 480px;
  border: 0;
  border-radius: 8px;
  background: #fff;
}

@media (max-width: 768px) {
  .pdf-preview{
    width: 90vw;
    max-width: 90vw;
    padding-bottom: 12px;
  }

  .pdf-preview iframe,
  .pdf-preview embed,
  .pdf-preview img{
    width: 90vw;
    max-width: 90vw;
  }

  .pdf-preview iframe,
  .pdf-preview embed{
    height: 60vh;
    min-height: 360px;
  }
}