/* 基础样式（保持不变） */
    .professional-intro {
        width: 100%;
        margin: 0 auto;
        padding: 20px 0;
        margin-top: 10px;
        font-family: "Microsoft YaHei", sans-serif;}
    
    .main-title {
        font-size: 24px;
        text-align: center;
        color: #16356c;
        background: url(images/title-bg.png) bottom center no-repeat;
        padding-bottom: 24px;
        margin-bottom: 30px;
        font-weight: bold;}
    
    .major-grid {
        display: grid;
        gap: 20px;
        justify-content: center;}
    
    .major-item {
        padding: 15px;
        background: #f8f9fa;
        border-radius: 8px;
        text-align: center;
        transition: all 0.3s ease; /* 添加平滑过渡 */
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        cursor: pointer;}
    
    .major-item:nth-child(1),
    .major-item:nth-child(6) {
        background:url(images/bg01.png) center center no-repeat;}
    .major-item:nth-child(2),
    .major-item:nth-child(7) {
        background:url(images/bg02.png) center center no-repeat;}
    .major-item:nth-child(3),
    .major-item:nth-child(8) {
        background:url(images/bg03.png) center center no-repeat;}
    .major-item:nth-child(4),
    .major-item:nth-child(9) {
        background:url(images/bg04.png) center center no-repeat;}
    .major-item:nth-child(5) {
        background:url(images/bg05.png) center center no-repeat;}
    
    /* 新增的悬停效果 */
    .major-item:hover {
        transform: translateY(-5px); /* 上浮效果 */
        box-shadow: 0 8px 15px rgba(0,0,0,0.1);}
    
    /* 图标和文字样式（保持不变） */
    .icon {
        width: 65px;
        height: 65px;
        margin: 0 auto 10px;}
    
    .icon img {
        width: 100%;
        height: 100%;
        object-fit: contain;}
    
    .text {
        color: #fff;
        font-size: 22px;
        font-weight: 500;}
    
    /* 响应式布局（保持不变） */
    @media (min-width: 992px) {
        .major-grid {
            grid-template-columns: repeat(5, 1fr);}
    }
    
    @media (max-width: 991px) {
        .major-grid {
            grid-template-columns: repeat(4, 1fr);}
    }
    
    @media (max-width: 768px) {
        .major-grid {
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;}
        .major-item {
            padding: 12px;}
        .icon {
            width: 40px;
            height: 40px;}
    }
    
    @media (max-width: 480px) {
        .major-grid {
            grid-template-columns: repeat(2, 1fr);}
    }