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

.container{
  width: 100%;
  height: 100%;
  overflow: hidden;
  /* 背景設置 */
  background-image: url('images/bg.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  /* background-color: #000000; 視頻頁面使用黑色背景 */
  /* background: #003058; */
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}
.center{
  width: 76%;
  margin: 0 auto;
  margin-top: 130px;
}
.center .video{
  width: 100%;
  display: inline-block;
}
.bottom{
  width: 13%;
  margin: 0 auto;
  margin-top: 34px;
}
.bottom img{
  width: 100%;
  display: inline-block;
}
.download_text{
  width: 26%;
  margin: 0 auto;
  margin-top: 4px;
}
.download_text img{
  width: 100%;
  display: inline-block;
}