.sub {
  width: 100%;
  max-width: 100vw;
}

.sub_top {
  width: 100%;
  height: 490px;
  position: relative;
  margin-top: 0px;
  z-index: 99;
  background-color: #101f3a;

  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.sub_top_txt {
  margin-left: 18%;
  font-family: "SdGntw", sans-serif;
  animation: sub_txt 1.2s 0.2s both;
}

.sub_top_txt h3 {
}

.sub_top_txt h2 {
}

.sub_top .video_box {
  position: absolute;
  right: 220px;
  top: 175px;

  width: 900px;
  height: 444px;
  background: white;
  border: 2px solid #a5a5a5;
  display: none;
}

.sub .page {
  margin-top: 230px;
}