* {margin:0;padding:0;box-sizing:border-box;}
  body {
    font-family: 'Poppins-Light', Poppins, sans-serif;
    color: #555;
    background: #fafafa;
    font-weight: 300;
    line-height: 1.75;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 70px 24px;
  }

  /* 顶部横幅 */
  .hero-banner {
    position: relative;
    height: 460px;
    border-radius: 24px;
    overflow: hidden;
    margin-bottom: 90px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.06);
  }
  .hero-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba0,0,0,0.5) 0%, rgba0,0,0,0.25) 100%);
  }
  .hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    z-index: 2;
    width: 90%;
    max-width: 800px;
  }
  /* 标题精简缩小 适配全站风格 */
  .hero-title {
    font-family: 'Poppins-Regular', Poppins, sans-serif;
    font-size: 36px;
    margin-bottom: 20px;
    letter-spacing: 1.2px;
    color: #fff;
    font-weight: 500;
  }
  .hero-desc {
    font-family: 'Poppins-Light', Poppins, sans-serif;
    font-size: 16px;
    line-height: 1.85;
    opacity: 0.96;
  }

  /* 唯一 CTA 引导 */
  .cta-box {
    background: #ffffff;
    border-left: 5px solid #C8A24A;
    padding: 45px 40px;
    border-radius: 16px;
    margin: 0 0 90px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.06);
    text-align: center;
  }
  .cta-title {
    font-family: 'Poppins-Regular', Poppins, sans-serif;
    font-size: 22px;
    color: #222;
    margin-bottom: 16px;
    letter-spacing: 0.3px;
    font-weight: 500;
  }
  .cta-desc {
    font-family: 'Poppins-Light', Poppins, sans-serif;
    font-size: 15px;
    line-height: 1.85;
    color: #666;
    margin-bottom: 32px;
    max-width: 850px;
    margin-left: auto;
    margin-right: auto;
  }
  .cta-links {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
  }
  /* 按钮缩小 精致居中 统一全站尺寸 */
  .cta-link {
    padding: 13px 32px;
    background: #C8A24A;
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-size: 13px;
    font-family: 'FuturaStd-Medium', sans-serif;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    white-space: nowrap;
    max-width: 220px;
  }
  .cta-link:hover {
    background: #b58f3f;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(200,162,74,0.25);
  }
  .cta-link.secondary {
    background: #222;
  }
  .cta-link.secondary:hover {
    background: #000;
    box-shadow: 0 6px 16px rgba(0,0,0,0.15);
  }
  
  /* 板块标题 统一缩小 不笨重 */
  .section-title {
    font-family: 'Poppins-Regular', Poppins, sans-serif;
    font-size: 24px;
    color: #222;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 18px;
    letter-spacing: 0.3px;
    font-weight: 500;
  }
  .section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 70px;
    height: 2px;
    background: #C8A24A;
  }
  .section-desc {
    font-family: 'Poppins-Light', Poppins, sans-serif;
    font-size: 15px;
    line-height: 1.85;
    color: #666;
    margin-bottom: 55px;
    max-width: 950px;
  }
  
  /* 证书卡片 */
  .cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 100px;
  }
  .cert-item {
    background: #fff;
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.04);
    transition: all 0.35s ease;
    cursor: pointer;
    overflow: hidden;
  }
  .cert-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.09);
  }
  .cert-thumb {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    object-fit: contain;
  }
  .cert-name {
    margin-top: 24px;
    font-family: 'Poppins-Regular', Poppins, sans-serif;
    font-size: 15px;
    color: #333;
    text-align: center;
    line-height: 1.55;
    font-weight: 400;
  }
  
  /* 底部 About Us 引导 */
  .about-cta {
    background: #ffffff;
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 6px 24px rgba(0,0,0,0.06);
    margin-top: 30px;
  }
  .about-title {
    font-family: 'Poppins-Regular', Poppins, sans-serif;
    font-size: 20px;
    color: #222;
    margin-bottom: 16px;
    font-weight: 500;
  }
  .about-desc {
    font-family: 'Poppins-Light', Poppins, sans-serif;
    font-size: 15px;
    color: #666;
    margin-bottom: 28px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
  }

  /* 弹窗 */
  .modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.88);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 30px;
    opacity: 0;
    transition: opacity 0.35s ease;
  }
  .modal.show {
    display: flex;
    opacity: 1;
  }
  .modal-content {
    max-width: 92%;
    max-height: 90%;
    border-radius: 12px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.4);
  }
  .close-btn {
    position: absolute;
    top: 35px;
    right: 35px;
    color: #fff;
    font-size: 42px;
    cursor: pointer;
    transition: color 0.3s;
    line-height: 1;
  }
  .close-btn:hover {
    color: #C8A24A;
  }

  /* 手机端完美适配 */
  @media (max-width: 768px) {
    .hero-banner {height: 320px;}
    .hero-title {font-size: 26px;}
    .section-title {font-size: 20px;}
    .cert-grid {grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 20px;}
    .cta-box, .about-cta {padding: 32px 20px;}
    .cta-links {gap: 15px;}
    .cta-link {padding: 12px 24px; font-size: 13px; max-width: 200px;}
    .cta-title {font-size: 20px;}
  }