/* 编队表演单页：编队表演视频、案例中心、720全景、影视拍摄 */
.biandui-page .section-block {
  margin-bottom: 56px;
}
.biandui-page .section-block:last-child {
  margin-bottom: 0;
}
.biandui-page .section-head {
  text-align: center;
  margin-bottom: 28px;
}
.biandui-page .section-head .cn {
  font-size: 24px;
  color: #333;
  margin-bottom: 8px;
}
.biandui-page .section-head .en {
  font-size: 13px;
  color: #999;
  letter-spacing: 2px;
}

/* 编队表演：主视频 */
.biandui-video-wrap {
  max-width: 900px;
  margin: 0 auto;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 16/9;
}
.biandui-video-wrap video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 案例中心：视频网格 */
.biandui-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.biandui-case-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #f5f5f5;
  aspect-ratio: 16/9;
}
.biandui-case-item video {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}
.biandui-case-item {
  cursor: pointer;
}
.biandui-case-item .biandui-play-btn {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s, background 0.2s;
  z-index: 2;
}
.biandui-case-item .biandui-play-btn:hover {
  transform: translate(-50%, -50%) scale(1.08);
  background: #fff;
}
.biandui-case-item .biandui-play-btn::after {
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 8px 0 8px 14px;
  border-color: transparent transparent transparent #333;
  margin-left: 4px;
}
.biandui-case-item .biandui-case-title {
  padding: 12px 0 0;
  font-size: 14px;
  color: #333;
  line-height: 1.4;
  text-align: center;
}

/* 720全景 */
.biandui-quanjing-wrap {
  max-width: 100%;
  border-radius: 8px;
  overflow: hidden;
  background: #f9f9f9;
}
.biandui-quanjing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.biandui-quanjing-item {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 16/10;
  background: #eee;
  cursor: pointer;
}
.biandui-quanjing-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.biandui-quanjing-item:hover img {
  transform: scale(1.03);
}
.biandui-quanjing-item .biandui-quanjing-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 10px 12px;
  font-size: 13px;
  color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
}

/* 影视拍摄：2x3 图片网格 */
.biandui-yingshi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.biandui-yingshi-item {
  border-radius: 8px;
  overflow: hidden;
  background: #f5f5f5;
  aspect-ratio: 4/3;
}
.biandui-yingshi-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.biandui-yingshi-item:hover img {
  transform: scale(1.03);
}
.biandui-yingshi-item .biandui-yingshi-name {
  padding: 10px 12px;
  font-size: 14px;
  color: #333;
  text-align: center;
}

/* 视频弹窗 */
.biandui-modal {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  padding: 20px;
  box-sizing: border-box;
}
.biandui-modal-inner {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  width: 800px;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.biandui-modal-inner video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.biandui-modal-close {
  position: absolute;
  right: 12px;
  top: 12px;
  width: 36px;
  height: 36px;
  border: none;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
  z-index: 2;
  transition: background 0.2s;
}
.biandui-modal-close:hover {
  background: rgba(255, 255, 255, 0.4);
}

/* 图片放大灯箱 */
.biandui-image-modal .biandui-modal-close {
  right: 16px;
  top: 16px;
}
.biandui-image-modal #biandui-image-modal-img {
  max-width: 95vw;
  max-height: 95vh;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

@media (max-width: 768px) {
  .biandui-page .section-block {
    margin-bottom: 40px;
  }
  .biandui-page .section-head .cn {
    font-size: 20px;
  }
  .biandui-case-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .biandui-quanjing-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .biandui-yingshi-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}
@media (max-width: 480px) {
  .biandui-case-grid {
    grid-template-columns: 1fr;
  }
  .biandui-yingshi-grid {
    grid-template-columns: 1fr;
  }
}