#zju10th-video-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  z-index: 9999999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 1s ease-out;
}

#zju10th-video-overlay.is-hidden {
  opacity: 0;
  pointer-events: none;
}

#zju10th-video-overlay video {
  width: auto;
  height: 100%;
  object-fit: contain;
}

@media screen and (max-width: 768px) {
  #zju10th-video-overlay video {
    width: 100%;
    height: auto;
  }
}

.zju10th-video-spinner {
  width: 44px;
  height: 44px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: #fff;
  border-radius: 50%;
  position: absolute;
  animation: zju10th-spinner-rotate 0.8s linear infinite;
  transition: opacity 0.3s ease;
}

@keyframes zju10th-spinner-rotate {
  to {
    transform: rotate(360deg);
  }
}

.zju10th-video-skip {
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.5);
  position: absolute;
  bottom: 48px;
  right: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-family: inherit;
  letter-spacing: 0.05em;
  padding: 10px 28px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 0.3s ease, background 0.2s ease;
}

.zju10th-video-skip.is-visible {
  opacity: 1;
}

.zju10th-video-skip:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.8);
}

@media screen and (max-width: 768px) {
  .zju10th-video-skip {
    bottom: 80px;
    left: 50%;
    right: auto;
    transform: translateX(-50%);
  }
}