/* 公司介绍标题 */
    .section-title{
        margin: 50px 0;
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    .section-title h2 {
        font-size: 42px;
        font-weight: 700;
        color: #1a1a1a;
        margin-bottom: 10px;
    }
    .section-title p {
        font-size: 14px;
        color: #999;
        letter-spacing: 2px;
    }

    /* 公司介绍部分 */
    .section-intro {
        background: var(--white);
        padding: 3rem 0;
        position: relative;
    }

    .intro-content {
        display: grid;
        grid-template-columns: 1fr;
        gap: 2rem;
        align-items: start;
        margin-bottom: 3rem;
        background-image: url(../images/introbg.png);
        background-position: center;
    }
    
    .stat-top{
        max-width: 1200px;
        width: 75%;
        position: absolute;
        left: 0;
        right: 0;
        margin: 0 auto;
        bottom: 200px;
        background: rgba(255,255,255,0.9);
        border-radius: 15px;
        display: flex;
        justify-content: space-around;
    }
    
    @media (max-width: 1400px) {
        .stat-top{
            bottom: 100px;
        }
    }
    
    @media (max-width: 1300px) {
        .stat-top{
            bottom: 50px;
        }
    }
    
    @media (max-width: 1200px) {
        .stat-top{
            position: static;
        }
    }
    
    .tabs>a{
        margin-right:0px;
    }

    @media (min-width: 768px) {
        .intro-content {
            grid-template-columns: 1fr 1fr;
        }
        .tabs>a{
            margin-right: 30px;
        }
    }
    
    .intro-image {
        position: relative;
    }
    
    .intro-image-inner {
        position: relative;
        max-width: 1200px;
        margin: 0 auto;
    }
    
    .intro-image img {
        width: 100%;
        border-radius: 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        display: block;
    }
    
    .intro-image .stat-card-all {
        position: absolute;
        bottom: 40px;
        right: 15px;
        z-index: 99;
        background: #fff;
        width: 35%;
        max-width: 200px;
        padding: 20px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        border-radius: 8px;
    }
    
    .intro-right {
        padding: 0 15px;
    }

    .intro-text h3 {
        font-size: 1.5rem;
        font-weight: bold;
        color: var(--text-dark);
        margin-bottom: 1rem;
    }

    .intro-text p {
        color: var(--text-light);
        margin-bottom: 1rem;
        line-height: 1.8;
    }

    .stats-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1.5rem;
        margin-bottom: 2rem;
    }

    .stat-card {
        background: var(--bg-gray);
        padding: 1.5rem;
        text-align: center;
        border-radius: 0.5rem;
    }

    .stat-number {
        font-size: 2rem;
        font-weight: bold;
        color: var(--primary-color);
        margin-bottom: 0.5rem;
        font-style: italic;
    }

    .stat-label {
        color: var(--text-dark);
        font-size: 0.875rem;
        line-height: 1.6;
        text-align: left;
    }

    .intro-full-text {
        color: var(--text-light);
        line-height: 1.8;
        padding: 0 15px;
    }

    /* 企业文化部分 */
    .section-culture {
        background: #f9f9f9;
        padding: 2rem 0 5rem;
    }

    .culture-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    @media (min-width: 768px) {
        .culture-grid {
            /*grid-template-columns: 2fr 1fr 1fr 1fr;*/
            grid-template-columns: repeat(5, 1fr);
            grid-template-rows: auto auto;
            height: 600px;
        }
        
        .culture-card.small {
            height: 600px;
        }
    }

    .culture-card {
        position: relative;
        border-radius: 0.5rem;
        overflow: hidden;
        cursor: pointer;
    }
    
    .culture-card::after{
        position: absolute;
        display: block;
        content: '';
        background: rgba(0,0,0,0.4);
        top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    }

    .culture-card.large {
        /*grid-column: span 1;*/
        height: 100%;
    }

    @media (min-width: 768px) {
        .culture-card{
            grid-column: span 1;
        }
        /*.culture-card:hover {*/
        /*    grid-column: span 2;*/
        /*    grid-row: span 2;*/
        /*    height: 600px;*/
        /*}*/
        
        .culture-grid .culture-card:first-child {
          grid-column: span 2;
        }
        
        .culture-grid:hover .culture-card            { grid-column: span 1; }   /* 先全部归 1 */
        .culture-grid .culture-card:hover            { grid-column: span 2; }   /* 再让 hover 的占 2 */
    }
    
    .culture-grid .culture-card:first-child .culture-smalltitle{
        display: block;
    }
    
    .culture-grid:hover .culture-card .culture-smalltitle{
        display: none;
    }
    
    .culture-grid .culture-card:hover .culture-smalltitle{
        display: block;
    }
    
    .culture-grid .culture-card:first-child::after{
        display: none;
    }
    
    .culture-grid:hover .culture-card::after{
        display: block;
    }
    
    .culture-grid .culture-card:hover::after{
        display: none;
    }

    .culture-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.3s;
    }

    .culture-card:hover img {
        transform: scale(1.05);
    }

    
    .culture-card-bottom {
        position: absolute;
        bottom: 0px;
        left: 0;
        right: 0;
        /*background: rgba(0, 0, 0, 0.7);*/
        color: white;
        padding: 15px;
        display: flex;
        align-items: flex-start;
        /*transform: translateY(100%);*/
        transition: transform 0.3s;
        flex-direction: column;
        background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
        z-index: 1;
    }
    
    /*.culture-card:hover .culture-card-bottom {*/
    /*    transform: translateY(0);*/
    /*}*/
    
    .culture-card-bottom i {
        font-size: 20px;
        margin-right: 10px;
    }
    
    .culture-card-bottom p {
        margin: 0;
        font-size: 20px;
    }
    
    .culture-card-bottom .culture-smalltitle{
        display: none;
        font-size: 16px;
    }
    
    .icon1,.icon2,.icon3,.icon4{
        width: 36px;
        height: 36px;
    }
    
    .icon1{
        background: url(../images/icon1.png) no-repeat;
        background-size: 100%;
    }
    
    .icon2{
        background: url(../images/icon2.png) no-repeat;
        background-size: 100%;
    }
    
    .icon3{
        background: url(../images/icon3.png) no-repeat;
        background-size: 100%;
    }
    
    .icon4{
        background: url(../images/icon4.png) no-repeat;
        background-size: 100%;
    }

    /* 发展历程时间线 */
    .section-history {
        padding: 3rem 0;
        position: relative;
        overflow: hidden;
    }

    .section-history::before {
        content: '';
        position: absolute;
        inset: 0;
        opacity: 0.15;
        z-index: 0;
    }

    .section-history .container {
        position: relative;
        z-index: 1;
    }

    /* 时间线样式 */
    .timeline {
        background: #ffffffeb;
        display: flex;
        flex-direction: column;
        border-radius: 10px;
        /*padding: 20px 0;*/
            overflow: hidden;
    }

    .timeline-item {
        display: flex;
        /*background: #fff;*/
    }

    .timeline-item:hover,.timeline-item.active {
        cursor: pointer;
        background: #c66518;
        color: #fff;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    }
    
    .timeline-item:hover,.timeline-item.active {
        cursor: pointer;
        background: #c66518;
        color: #fff;
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    }

    .timeline-item:hover .timeline-content p,.timeline-item.active .timeline-content p{
        color: #fff;
    }
    
    .timeline-item.active{
        border-bottom: 1px dashed #ddd;
    }

    .timeline-year {
        position: relative;
      padding: 30px 40px;
      font-size: 32px;
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: center;
      min-width: 150px;
      border-right: 1px solid #d9d9d9;
      color:#c76518;
    }
    
    .timeline-year::after{
        position: absolute;
        display: block;
        content: '';
        width: 5px;
        height: 50px;
        background:#c66518;
        right: -3px;
    }
    
    .timeline-item.active .timeline-year::after,.timeline-item:hover .timeline-year::after{
        background:#fff;
    }
    
    .timeline-item.active .timeline-year,.timeline-item:hover .timeline-year{
        color: #fff;
    }

    .timeline-content {
      padding: 30px;
      flex: 1;
      display: flex;
      align-items: center;
      color: var(--text-dark);
      font-size: 16px;
      margin: 0 10px;
      border-bottom: 1px dashed #ddd;
    }
    .timeline-content p{
        height: 30px;
        line-height: 30px;
        overflow: hidden;
    }
    .timeline-item:hover .timeline-content p{
        height: auto;
    }
    @media (max-width: 768px) {
        .timeline-content p{
            height: 90px;
            line-height: 30px;
            overflow: hidden;
        }
    }
    /* 视频部分 */
    .section-video {
        background: var(--white);
        padding: 3rem 0;
    }

    .video-container {
        position: relative;
        width: 100%;
        padding-bottom: 56.25%;
        height: 0;
        overflow: hidden;
        border-radius: 0.5rem;
        background: #000;
        margin-bottom: 2rem;
    }
    
    .video-container video {
      width: 100%;
      display: block;
    }

    .video-container iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        border: none;
        border-radius: 0.5rem;
    }

    .video-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.5));
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        color: var(--white);
        text-align: center;
        z-index: 1;
        pointer-events: none;
    }

    .video-title {
        font-size: 2rem;
        font-weight: bold;
        margin-bottom: 0.5rem;
    }

    .video-subtitle {
        font-size: 1rem;
    }

    .video-thumbnails {
        display: flex;
    }

    .video-thumbnails img {
        width: 100px;
        border-radius: 0.5rem;
        cursor: pointer;
        transition: transform 0.3s;
        margin-right: 15px;
    }

    .video-thumbnails img:hover {
        transform: scale(1.05);
    }