.about-page {
    max-width: 1160px;
    margin: 0 auto;
    padding: 60px 20px;
    font-family: Calibri, Arial, sans-serif;
    color: #333;
    line-height: 1.7;
  }

  .about-page h1 {
    font-size: 36px;
    line-height: 1.25;
    color: #236fa1;
    font-weight: 700;
    margin: 0 0 35px;
  }

  .about-page h2 {
    font-size: 28px;
    color: #222;
    font-weight: 700;
    margin-bottom: 20px;
  }

  .about-page h3 {
    font-size: 24px;
    color: #222;
    font-weight: 700;
    margin: 45px 0 18px;
  }

  .about-page p {
    font-size: 16px;
    margin: 0 0 16px;
  }

  /* ⭐ 核心：左右布局 */
  .overview-flex {
    display: flex;
    gap: 40px;
    align-items: flex-start;
  }

  .overview-image {
    flex: 0 0 42%;
  }

  .overview-image img {
    width: 100%;
    height: auto;
  }

  .overview-text {
    flex: 1;
  }

  .full-image {
    margin: 40px 0;
    text-align: center;
  }

  .full-image img {
    max-width: 100%;
  }

  .solution-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 25px;
  }

  .solution-card {
    background: #f7f9fb;
    border-left: 4px solid #236fa1;
    padding: 22px 24px;
  }

  .solution-card strong {
    display: block;
    font-size: 18px;
    margin-bottom: 10px;
  }

  .video-box {
    margin: 55px 0 20px;
    text-align: center;
  }

  .video-box iframe {
    width: 100%;
    max-width: 800px;
    height: 450px;
    border: none;
  }

  /* 移动端适配 */
  @media screen and (max-width: 900px) {
    .overview-flex {
      flex-direction: column;
    }

    .solution-list {
      grid-template-columns: 1fr;
    }
  }

  @media screen and (max-width: 768px) {
    .about-page h1 {
      font-size: 26px;
    }

    .about-page h2 {
      font-size: 22px;
    }

    .about-page h3 {
      font-size: 20px;
    }

    .about-page p {
      font-size: 14px;
    }

    .video-box iframe {
      height: 240px;
    }
  }