/* ✅ 限制最大宽度 1100px */
    .scene {
      perspective: 2000px;
      width: 100%;
      max-width: 1100px;
      height: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
      margin: 0 auto;
      margin-top:230px;
      margin-bottom:-70px;
    }

    .cylinder {
      position: relative;
      width: 280px;
      height: 380px;
      transform-style: preserve-3d;
    }

    .certificate {
      position: absolute;
      top: 0;
      left: 0; /* ✅ 不再偏移到 50%，保证整体居中 */
      right: 0;
      margin: auto;
      transform-style: preserve-3d;
      transform-origin: center center 0px; /* ✅ 控制半径 */
    }

    .certificate img {
      width: 230px;
      height: auto;
      border: 4px solid #e6e6e6;
      box-shadow: 0 8px 16px rgba(0,0,0,0.2);
      background: #fff;
      display: block;
      margin: 0 auto;
    }