body {
    background-color: #ffffff;
    margin: 0;
    padding: 60px 0;
  }
  .video-container {
    width: 1680px;
    margin: 0 auto;
    padding: 0 50px;
    box-sizing: border-box;
    position: relative;
  }
  swiper-container {
    width: 100%;
    padding-bottom: 0;
    overflow: hidden;
  }
  .video-card {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    position: relative; /* 必须加 */
  }
  .video-card iframe {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
    display: block;
    border: 0;
  }

  /* ========== 封面 + 播放按钮样式 ========== */
  .video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    cursor: pointer;
  }
  .video-overlay img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    background: rgba(0,0,0,0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
  }
  .video-overlay:hover .play-icon {
    transform: translate(-50%, -50%) scale(1.15);
  }

  /* ========== 轮播按钮 ========== */
  .swiper-button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #ffffff;
    color: #000000;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    z-index: 20;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
  }
  .swiper-button:hover {
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
    transform: translateY(-50%) scale(1.05);
  }
  .swiper-button-prev {
    left: 10px;
  }
  .swiper-button-next {
    right: 10px;
  }