.mb-youtube-video-section {
      width: 100%;
      box-sizing: border-box;
      padding: 48px 0 48px;
      background: #fff;
      font-family: Arial, Helvetica, sans-serif;
      color: #20211d;
      overflow: hidden;
    }

    .mb-youtube-video-section * {
      box-sizing: border-box;
    }

    .mb-youtube-video-wrap {
      max-width: 1680px;
      margin: 0 auto;
      padding: 0;
    }

    .mb-youtube-video-card {
      display: grid;
      grid-template-columns: 0.9fr 1.35fr;
      gap: 28px;
      align-items: center;
      border-radius: 22px;
      background: #fff;
      border: 1px solid rgba(0, 0, 0, 0.065);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.035);
      overflow: hidden;
    }

    .mb-youtube-video-copy {
      padding: 58px 0 58px 42px;
    }

    .mb-youtube-video-title {
      margin: 0 0 14px;
      font-size: clamp(30px, 3vw, 44px);
      line-height: 1.08;
      letter-spacing: -0.045em;
      color: #20211d;
      font-weight: 800;
    }

    .mb-youtube-video-title span {
      color: #74633f;
      font-weight: 500;
    }

    .mb-youtube-video-desc {
      margin: 0 0 20px;
      max-width: 560px;
      color: #5f5f59;
      font-size: 15px;
      line-height: 1.65;
    }

    .mb-youtube-video-points {
      display: grid;
      gap: 9px;
      margin-bottom: 0;
    }

    .mb-youtube-video-point {
      display: flex;
      align-items: center;
      gap: 9px;
      color: #33342f;
      font-size: 13px;
      line-height: 1.4;
      font-weight: 700;
    }

    .mb-youtube-video-point i {
      width: 18px;
      height: 18px;
      flex: 0 0 18px;
      border-radius: 50%;
      background: #20211d;
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-style: normal;
      font-size: 10px;
      font-weight: 900;
    }

    .mb-youtube-video-media {
      position: relative;
      height: auto;
      min-height: auto;
      padding: 18px;
      background:
        radial-gradient(circle at 70% 30%, rgba(255, 255, 255, 0.14), transparent 34%),
        linear-gradient(135deg, #171914 0%, #2d3029 52%, #12130f 100%);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* 重点：按原视频封面比例显示，不再压矮 */
    .mb-youtube-video-box {
      position: relative;
      width: 100%;
      aspect-ratio: 16 / 9;
      min-height: auto;
      height: auto;
      border-radius: 18px;
      overflow: hidden;
      background: #111;
      box-shadow: 0 18px 46px rgba(0, 0, 0, 0.22);
      cursor: pointer;
    }

    .mb-youtube-video-poster {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      opacity: 0.94;
      transition: transform 0.35s ease, opacity 0.35s ease;
    }

    .mb-youtube-video-box:hover .mb-youtube-video-poster {
      transform: scale(1.025);
      opacity: 0.84;
    }

    .mb-youtube-video-overlay {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(0,0,0,0.58), rgba(0,0,0,0.12) 54%, rgba(0,0,0,0.18)),
        linear-gradient(180deg, rgba(0,0,0,0.12), rgba(0,0,0,0.44));
      z-index: 2;
    }

    .mb-youtube-video-caption {
      position: absolute;
      left: 34px;
      top: 32px;
      z-index: 4;
      max-width: 560px;
      color: #fff;
      pointer-events: none;
    }

    .mb-youtube-video-caption strong {
      display: block;
      margin-bottom: 0;
      font-size: clamp(24px, 2.5vw, 40px);
      line-height: 1.08;
      letter-spacing: -0.04em;
    }

    .mb-youtube-video-play {
      position: absolute;
      left: 34px;
      bottom: 34px;
      z-index: 4;
      display: inline-flex;
      align-items: center;
      gap: 12px;
      border: 0;
      background: rgba(255, 255, 255, 0.92);
      color: #20211d;
      border-radius: 999px;
      padding: 10px 18px 10px 12px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 900;
      box-shadow: 0 12px 30px rgba(0,0,0,0.22);
    }

    .mb-youtube-video-play span {
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: #20211d;
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      line-height: 1;
      padding-left: 2px;
    }

    .mb-youtube-video-box iframe {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      border: 0;
      z-index: 8;
      background: #111;
    }

    @media (max-width: 1720px) {
      .mb-youtube-video-wrap {
        padding: 0 18px;
      }
    }

    @media (max-width: 980px) {
      .mb-youtube-video-card {
        grid-template-columns: 1fr;
        gap: 0;
      }

      .mb-youtube-video-copy {
        padding: 30px 24px 24px;
      }

      .mb-youtube-video-media {
        padding: 14px;
      }

      .mb-youtube-video-box {
        aspect-ratio: 16 / 9;
      }
    }

    @media (max-width: 520px) {
      .mb-youtube-video-section {
        padding: 34px 0 34px;
      }

      .mb-youtube-video-wrap {
        padding: 0 15px;
      }

      .mb-youtube-video-card {
        border-radius: 18px;
      }

      .mb-youtube-video-copy {
        padding: 24px 18px 20px;
      }

      .mb-youtube-video-title {
        font-size: 30px;
      }

      .mb-youtube-video-desc {
        font-size: 14px;
      }

      .mb-youtube-video-caption {
        left: 20px;
        top: 20px;
        right: 20px;
      }

      .mb-youtube-video-caption strong {
        font-size: 22px;
      }

      .mb-youtube-video-play {
        left: 20px;
        bottom: 20px;
        font-size: 13px;
        padding: 8px 14px 8px 10px;
      }

      .mb-youtube-video-play span {
        width: 30px;
        height: 30px;
      }
    }