.block-index {
  height: calc(100vh - 80px);
}
.video-container {
  z-index: 2;
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  right: 0;
  /* background: url('../images/poster.png') no-repeat left center;
  background-size: cover; */
}
.video-container video {
  object-fit: cover;
  width: 100%;
  height: 100%;
}
.main-index {
  z-index: 8;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, .2) 100%);
}
.main-index .content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.main-index .title {
  font-size: 3.6rem;
  color: white;
}
.main-index .title span {
  display: block;
  line-height: 4.8rem;
  text-align: center;
}
.main-index .en {
  font-size: 2.5rem !important;
  font-weight: bold;
}
.main-index .en span {
  line-height: 2.5rem !important;
}
.main-index .position a {
  position: absolute;
  right: 1rem;
  bottom: 2rem;
}
.icon-triangle-arrow {
  position: absolute;
  left: 50%;
  bottom: 10rem;
  display: block;
  margin-left: -2rem;
  width: 4rem;
  height: 4rem;
  background: url('../images/logo-button.png') no-repeat center;
  background-size: contain;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 0 0 rgba(255, 255, 255, .5);
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0% {
    transform: scale(.9);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 1rem rgba(255, 255, 255, 0);
  }
  100% {
    transform: scale(.9);
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0);
  }
}


@media (max-width: 767.98px) {
  .header-container h2 {
    display: none;
  }
  .block-index {
    height: calc(100vh - 65px);
  }
  .block-index .container h2 {
    font-size: 2.8rem;
    line-height: 3.2rem;
  }
  .icon-triangle-arrow {
    /* width: 1.5rem;
    height: 1.5rem; */
    bottom: 5rem;
  }
}