main {
  min-width: 100vw;
  min-height: 100vh;
  position: relative;
  overflow: hidden;
}

.mask {
  width: 100vw;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.35);
  z-index: 1000;
}

.video {
  width: 100%;
  overflow: hidden;
  position: absolute;
  top: 0;
  right: 0;
}

.header {
  min-width: 100%;
  max-height: 80px;
  position: absolute;
  top: 0;
  z-index: 1000;
  padding-top: 15px;
  padding-left: 15px;
}
.header > .header-logo {
  max-width: 80px;
  max-height: 80px;
}
.header > .header-logo > img {
  width: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}

.content {
  width: 100%;
  position: absolute;
  top: 100px;
  padding: 0 15px;
  z-index: 1200;
}
@media (min-width: 768px) {
  .content {
    top: 120px;
  }
}
.content > .year {
  width: 100%;
  font-size: 4rem;
  color: white;
  text-align: center;
  letter-spacing: 1px;
}
@media (min-width: 768px) {
  .content > .year {
    width: 750px;
    margin: 0 auto;
  }
}
.content > .title-cn {
  width: 100%;
  font-size: 30px;
  color: white;
  text-align: center;
}
@media (min-width: 768px) {
  .content > .title-cn {
    width: 750px;
    margin: 0 auto;
    font-size: 2.5rem;
  }
}
.content > .title-en {
  width: 100%;
  color: white;
  text-align: center;
}
@media (min-width: 768px) {
  .content > .title-en {
    width: 750px;
    margin: 15px auto 0 auto;
  }
}
.content > .title-en > p {
  margin-bottom: 10px !important;
}
.content > .title-en > p.first-line {
  font-size: 20px;
}
@media (min-width: 768px) {
  .content > .title-en > p.first-line {
    font-size: 20px;
  }
}
.content > .title-en > p.second-line {
  font-size: 20px;
}
@media (min-width: 768px) {
  .content > .title-en > p.second-line {
    font-size: 25px;
  }
}
.content > .buttons {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
}
@media (min-width: 768px) {
  .content > .buttons {
    flex-direction: row;
  }
}
.content > .buttons > a {
  width: 300px;
  height: 80px;
  background-color: rgba(255, 255, 255, 0.65);
  margin-top: 15px;
  text-align: center;
  font-size: 20px;
  text-decoration: none;
  border-radius: 5px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  color: #0081a7;
  font-weight: bold;
}
@media (min-width: 768px) {
  .content > .buttons > a {
    margin-top: 50px;
  }
  .content > .buttons > a:first-child {
    margin-right: 15px;
  }
}
.content > .buttons > a:hover {
  background-color: rgba(255, 255, 255, 0.85);
  color: #ffb703;
  font-weight: bold;
}