/* ============ 开场海报独立lightbox(无下载按钮) ============ */
.opening-lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.94);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: lightboxFadeIn 0.3s ease;
}
.opening-lightbox.show { display: flex; }
.opening-lightbox-img {
  max-width: 94vw;
  max-height: 94vh;
  object-fit: contain;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.8);
  cursor: default;
  animation: lightboxImgIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.opening-lightbox-close {
  position: fixed;
  top: 24px;
  right: 24px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 10px 18px;
  border-radius: 6px;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 14px;
  letter-spacing: 3px;
  cursor: pointer;
  transition: all 0.2s;
  z-index: 1001;
}
.opening-lightbox-close:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-1px);
}