/* 独立样式，只作用于此板块，不污染全局 */
    .logistics-challenges-section {
      background: #f8f8f8;
      padding: 70px 0;
      width: 100%;
    }
    .logistics-challenges-section .container {
      max-width: 1400px;
      margin: 0 auto;
      padding: 0 40px;
    }
    .logistics-challenges-section .title {
      text-align: center;
      font-size: 44px;
      color: #222;
      margin-bottom: 50px;
      opacity: 0;
      animation: logistics-titleAnim 1.5s ease forwards;
    }
    .logistics-challenges-section .wrap {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 32px;
      width: 100%;
    }
    .logistics-challenges-section .item-box {
      background: #fff;
      padding: 40px 32px;
      opacity: 0;
      transform: translateY(60px);
      animation: logistics-boxUp 1s ease forwards;
      border-radius: 4px;
    }
    .logistics-challenges-section .item-box:nth-child(1) { animation-delay: 0.3s; }
    .logistics-challenges-section .item-box:nth-child(2) { animation-delay: 0.5s; }
    .logistics-challenges-section .item-box:nth-child(3) { animation-delay: 0.7s; }
    .logistics-challenges-section .icon {
      width: 90px;
      height: 90px;
      margin-bottom: 24px;
      object-fit: contain;
    }
    .logistics-challenges-section .item-h2 {
      font-size: 22px;
      color: #222;
      margin-bottom: 16px;
      line-height: 1.4;
      font-weight: bold;
    }
    .logistics-challenges-section .item-text {
      font-size: 16px;
      color: #333;
      line-height: 1.75;
      letter-spacing: 0.2px;
    }

    /* 独立动画名称，不与其他动画冲突 */
    @keyframes logistics-titleAnim {
      0%{opacity:0;letter-spacing:-5px;transform:translateY(15px);}
      100%{opacity:1;letter-spacing:0;transform:translateY(0);}
    }
    @keyframes logistics-boxUp {
      to{opacity:1;transform:translateY(0);}
    }