@media screen and (min-width: 768px) {
    /* 第一页样式 */
    .video-section {
        position: relative;
        width: 100%;
        height: 100vh; /* 固定高度为一屏 */
        overflow: hidden;
    }
    .video-background {
       position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: fill; /* 拉伸填充整个容器 */
        z-index: -1;
    }
    .video-overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5); /* 半透明黑色覆盖层 */
    }

    .video-social-icons {
        position: absolute;
        bottom: 30px; /* 距离底部20px */
        right: 30px; /* 距离右边20px */
        display: flex;
        flex-direction: column;
        gap: 15px;
        z-index: 10; /* 确保图标在视频上方 */
    }

    .video-icon-item a {
        display: block;
    }

    .video-icon-item img {
        width: 24px;
        height: 24px;
        transition: all 0.3s ease;
        opacity: 0.8;
    }

    .video-icon-item img:hover {
        transform: scale(1.2);
        opacity: 1;
    }




    /* 第三页样式 */   
    .section-3 .content-container{
        margin-left: auto;
        margin-right: auto;
        margin-top: 50px;
        
    }

    .section-3 h1{
        font-size: 38px;
        line-height: 100%;
        color:#fff;
        margin-top: 0;
    }

    .section-3 .image-container{
        margin-top: 50px;
        margin-bottom: 50px;
    }

    .section-3 .image-container img{
        width: 240px;
        height: 240px;
    }
    .section-3 .content{
        margin-left: 20%;
        margin-right: 20%;
    }
    .section-3 p {
        font-size: 18px;
        line-height: 250%;
    }
    /* 图片旋转样式 */
    .rotating-image {
        transition: transform 0.1s linear;
        margin-bottom: 20px;
    }

    .section-3-add-1{
        margin-top: 50px;
    }
        /* 核心价值观容器 */
    .core-values-container {
        width: 80%;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 60px 20px;
        position: relative;
        margin-left: 10%;
        margin-right: 10%;
        margin: 0 auto;
        color: white;
    }

    /* 垂直线 */
    .core-values-container::before {
        content: '';
        position: absolute;
        top: 0;
        bottom: 0;
        left: 50%;
        width: 2px;
        background: linear-gradient(to bottom, #000000, #ffffff, #000000);
        transform: translateX(-50%);
        z-index: 1;
    }

    /* 每个值项 */
    .value-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        margin: 40px 0;
        position: relative;
        z-index: 2;
    }


    /* 文字部分 */
    .value-text {
        flex: 1;
        text-align: center;
        max-width: 400px;
    }

    .value-text h3 {
        font-size: 1.5rem;
        margin-bottom: 8px;
        color: #fff;
        font-weight: bold;
    }

    .value-text p {
        color: #ccc;
        font-size: 18px;
        line-height: 250%;
    }

    /* 左侧文字布局 */
    .left-text {
        flex-direction: row;
    }

    .left-text .value-text {
        text-align: center;
    }

    /* 右侧文字布局 */
    .right-text {
        flex-direction: row-reverse;
    }

    .right-text .value-text {
        text-align: center;
    }


    /* 第四页样式 */      
    .section-4 {
        padding: 50px 0;
        text-align: left;
    }

    .section-4 h1 {
        margin-left: 80px; /* 距离左边30px */
        color: white;
        font-size: 2rem;
        margin-bottom: 80px;
    }

    .market_content {
        display: flex;
        justify-content: center;
        align-items: center;
        flex-wrap: wrap;
        gap: 80px;
        padding: 0 20px;
    }

    .market1 {
        position: relative;
        flex: 1;
        min-width: 200px;
        max-width: calc(25% - 15px);
        text-align: center;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        perspective: 1000px; /* 添加3D视角 */
    }

    .market1 img {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 8px;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3); /* 添加默认阴影 */
    }

    .market1 span {
        display: block;
        color: white;
        margin-top: 10px;
        font-size: 24px;
        position: absolute;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        width: 100%;
        text-align: center;
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        z-index: 2; /* 确保文字在图片上方 */
    }

    /* 鼠标悬停效果 - 增强版 */
    .market1:hover {
        transform: translateY(-15px) scale(1.03); /* 向上移动并轻微放大 */
        z-index: 10; /* 提高层级 */
    }

    .market1:hover img {
        filter: blur(3px) brightness(0.8); /* 图片变模糊并稍微变暗 */
        transform: scale(1.05); /* 图片轻微放大 */
        box-shadow: 0 12px 25px rgba(0, 0, 0, 0.5); /* 增强阴影效果 */
    }

    .market1:hover span {
        font-size: 32px; /* 文字变大 */
        font-weight: bold;
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.8); /* 增强发光效果 */
        transform: translateX(-50%) scale(1.1); /* 文字也轻微放大 */
    }


    /* 第五页样式 - Case Studies */
    .section-5 {
        padding: 50px 0;
        text-align: left;
        position: relative;
    }

    .section-5 h1 {
        margin-left: 80px;
        color: white;
        font-size: 2rem;
        margin-bottom: 80px;
    }

    .case_studies_content {
        display: flex;
        overflow-x: auto;
        overflow-y: hidden;
        scroll-behavior: smooth;
        padding: 0 20px 20px 20px;
        gap: 20px;
         /* 隐藏滚动条 - Webkit浏览器 */
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE/Edge */
    }


    .case_studies_content::-webkit-scrollbar {
        display: none;
    }


    .case-module {
        flex: 0 0 calc(50% - 10px);
        min-width: 300px;
        background-color: #2a2a2a;
        border-radius: 8px;
        overflow: hidden;
    }

    .case-image {
        position: relative;
        width: 100%;
    }

    .case-image img {
        width: 100%;
        height: auto;
        display: block;
    }

    .case-buttons {
        position: absolute;
        top: 10px;
        right: 10px;
        display: flex;
        flex-direction: column;
        gap: 10px;
        padding: 5px;
        align-items: flex-end;
        height: calc(100% - 20px); /* 占据整个容器高度 */
    }
    .case-btn.top-btn {
        align-self: flex-end; /* 保持在右侧顶部 */
    }

    .case-btn.bottom-btn {
        align-self: flex-end; /* 保持在右侧 */
        margin-top: auto; /* 推到容器底部 */
    }

    .case-btn {
        background-color: transparent; /* 背景透明 */
        color: white; /* 字体白色 */
        border: 1px solid white; /* 白色圆角边框 */
        border-radius: 5px; /* 圆角 */
        padding: 6px 12px; /* 调整内边距 */
        cursor: pointer;
        font-family: 'Microsoft JhengHei', Arial, sans-serif;
        font-size: 24px; /* 调整字体大小 */
        transition: background-color 0.3s ease;
        white-space: nowrap;
        min-width: 100px;
        text-align: center;
        width: fit-content; 
        margin: 2px 0;
    }

    .case-btn:hover {
        background-color: rgba(128, 128, 128, 0.5);
    }

    .case-text {
        padding: 15px;
        text-align: center;
    }

    .case-text p {
        margin: 0;
        color: white;
        font-size: 16px;
    }


    /* 修改导航按钮样式，使其固定在 case_studies_content 两侧并垂直居中 */
.case-studies-nav {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
    pointer-events: auto;
    z-index: 11;
}

.nav-arrow:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.nav-arrow:active {
    transform: translateY(-50%) scale(0.95);
}

.left-arrow {
    left: 20px;
}

.right-arrow {
    right: 20px;
}

.nav-arrow svg {
    width: 24px;
    height: 24px;
}





    /* 第六页样式 - Exhibits & Events*/
    .section-6 {
        padding: 50px 0;
        text-align: left;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .section-6 h1 {
        margin-left: 80px;
        color: white;
        font-size: 2rem;
        margin-bottom: 80px;
    }

    .section-6 .image-container {
        flex: 1;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0 20px;
        overflow: hidden;
    }

    .horizontal-scroll-container {
        width: 100%;
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: thin;
        scrollbar-color: #0056b3 #333;
        border-radius: 8px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .horizontal-scroll-container::-webkit-scrollbar {
        height: 8px;
    }

    .horizontal-scroll-container::-webkit-scrollbar-track {
        background: #333;
    }

    .horizontal-scroll-container::-webkit-scrollbar-thumb {
        background-color: #666;
        border-radius: 4px;
    }

    .scroll-wrapper {
        display: flex;
        height: 100%;
        gap: 20px;
        padding: 10px;
    }

    .scroll-wrapper img {
        flex: 0 0 auto;
        max-width: 100vw;
        width: 100vw;
        height: auto; 
        object-fit: contain;
        border-radius: 8px;
    }


    /* 其他内容区域样式 */
    .content-section {
        height: 100vh;
        padding: 50px 20px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
    }
}