.main {
      margin-top: 5rem;
  }
  /* 标题区域 */
  .section-header {
      padding: 3rem 0 2rem;
      border-bottom: 1px solid #D6D6D6;
      margin-bottom: 3rem;
  }

  .section-subtitle {
      color: #ff2b0f;
      font-size: 0.9rem;
      margin-bottom: 0.5rem;
  }

  .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      margin: 0;
  }
    .service-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            margin-bottom: 24px;
        }
        .card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .card-body {
            padding: 1.2rem;
        }
        .card-title {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
        }
        .hot-tag {
            color: #ff3b30;
            font-size: 1rem;
            font-weight: 600;
            margin-left: 8px;
        }
        .card-subtitle {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: #111;
            text-align: left;
        }
        .card-desc {
            font-size: 1.1rem;
            color: #616161;
            line-height: 1.7;
            margin-bottom: 24px;
            text-align: left;
        }
        .demo-btn {
            background-color: #ff2b00;
            border: none;
            border-radius: 8px;
            color: white;
            font-size: 0.9rem;
            font-weight: 600;
            padding: 0.6rem 1rem;
            transition: background-color 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .demo-btn:hover {
            background-color: #e62600;
            color: white;
        }
        .demo-btn .arrow {
            width: 1rem;
            margin-left: 8px;
        }
        /* 桌面端左右布局 */
        @media (min-width: 768px) {
            .service-card .row {
                flex-direction: row;
            }
            .card-img-wrapper {
                width: 35%;
            }
            .card-content-wrapper {
                width: 65%;
                display: flex;
                flex-direction: column;
                justify-content: center;
            }
            .card-img {
                height: 100%;
                border-radius: 12px 0 0 12px;
            }
        }
        /* 手機端上下布局 */
        @media (max-width: 767.98px) {
             .section-subtitle,
      .section-title {
          text-align: center;
      }
            .card-img {
                border-radius: 12px 12px 0 0;
            }
            .card-body {
                text-align: center;
            }
            .demo-btn {
                width: auto;
                margin: 0 auto;
            }
        }