.delta-light-section {
    padding: 90px 20px;
    background-color: transparent; /* 完美继承您原有的浅色背景 */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  }
  
  .delta-light-container {
    max-width: 1200px;
    margin: 0 auto;
  }
  
  /* 头部区域 */
  .delta-light-header {
    text-align: center;
    margin-bottom: 75px; /* 略微拉开间距，给大图标留出呼吸空间 */
  }
  .delta-brand-tag {
    font-size: 12px;
    color: #005da6; /* Delta 蓝 */
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 12px;
  }
  .delta-light-header h2 {
    font-size: 36px;
    color: #1a1a1a;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.5px;
  }
  .delta-red-text {
    color: #C1272E; /* 点缀红 */
  }
  
  /* 4列网格系统 */
  .delta-light-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
  }
  
  /* 卡片主体 */
  .delta-light-card {
    position: relative;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    padding: 50px 28px 38px 28px; /* 增加顶部内边距 */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }
  
  /* 卡片顶部的激光过渡条 */
  .card-laser-line {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: #005da6;
    border-radius: 14px 14px 0 0;
    transition: all 0.4s ease;
  }
  
  /* 新增：大图标外围的立体感知空间圈 */
  .icon-container-box {
    width: 76px;
    height: 76px;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 93, 166, 0.03); /* 极其淡雅的蓝底座 */
    border-radius: 16px;
    transition: all 0.4s ease;
  }
  
  /* 破格设计：中央核心大图标圈 (从50px加大到64px) */
  .card-badge-icon {
    width: 64px;
    height: 64px;
    background: #ffffff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
    transition: all 0.4s ease;
  }
  
  /* 图标本身放大 (从24px加大到32px) */
  .card-badge-icon svg {
    width: 32px;
    height: 32px;
    fill: #005da6; /* 初始为Delta深邃蓝 */
    transition: all 0.4s ease;
  }
  
  /* 文字排版 */
  .delta-light-card h3 {
    font-size: 19px;
    color: #0f172a;
    font-weight: 600;
    margin: 0 0 14px 0;
    letter-spacing: -0.3px;
  }
  .delta-light-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
    margin: 0;
  }
  
  /* ================== 更强烈的 Hover 动效联动 ================== */
  .delta-light-card:hover {
    transform: translateY(-8px);
    border-color: transparent;
    box-shadow: 0 20px 40px rgba(0, 93, 166, 0.08), 0 1px 10px rgba(193, 39, 46, 0.05);
  }
  
  /* 顶部分离条变为流光渐变 */
  .delta-light-card:hover .card-laser-line {
    background: linear-gradient(90deg, #005da6 0%, #C1272E 100%);
    height: 5px;
  }
  
  /* 浅红色扩散效果 */
  .delta-light-card:hover .icon-container-box {
    background: rgba(193, 39, 46, 0.06);
    transform: scale(1.05);
  }
  
  /* 核心图标圆框高亮，呈现高精密质感 */
  .delta-light-card:hover .card-badge-icon {
    background: #ffffff;
    border-color: rgba(193, 39, 46, 0.4);
    box-shadow: 0 6px 15px rgba(193, 39, 46, 0.15);
  }
  
  /* 内部图标精准切换为点缀红 */
  .delta-light-card:hover .card-badge-icon svg {
    fill: #C1272E;
    transform: scale(1.05);
  }
  
  /* ================== 完美的响应式适配 ================== */
  @media (max-width: 1024px) {
    .delta-light-section { padding: 70px 25px; }
    .delta-light-header h2 { font-size: 32px; }
    .delta-light-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 25px;
    }
  }
  
  @media (max-width: 768px) {
    .delta-light-section { padding: 50px 15px; }
    .delta-light-header { margin-bottom: 45px; }
    .delta-light-header h2 { font-size: 26px; }
    .delta-light-grid {
      grid-template-columns: 1fr;
      gap: 20px;
    }
    .delta-light-card { padding: 45px 22px 32px 22px; }
    .icon-container-box { margin-bottom: 22px; }
  }