.qk-bg{background-color: #f4f7fa;
        display: block;}
        .dropdown-content {
            display: none;
            position: absolute;
            width: 960px;
            background-color: #f0eeee;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            padding: 20px;
            z-index: 1;
            color: #726f6f;
            transition: all 0.3s ease;
            /* 修改定位逻辑，让下拉菜单出现在导航项下方 */
            left: 50%;
            transform: translateX(-50%);
            top: 100%;
            
        }
        .dropdown-content::before {
            content: "";
            position: absolute;
            left: 50%;
            top: -10px; /* 将三角形向上移动到下拉菜单上方 */
            transform: translateX(-50%);
            border-left: 20px solid transparent;
            border-right: 20px solid transparent;
            border-bottom: 20px solid #f0eeee; /* 三角形颜色与下拉菜单背景色一致 */
        }

        .nav-item:hover .dropdown-content {
            display: flex;
            justify-content: space-between;
        }

        .dropdown-left {
            width: 25%;
        }
        .dropdown-left a {
            color: #ec5114;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .dropdown-left h5 {
            color: #8b8585;
            font-size: 20px;
            margin: 30px 0px;
            font-weight: normal;
        }

        .dropdown-right {
            width: 75%;
            display: flex;
            /* 使子元素水平排列 */
            flex-wrap: wrap;
            /* 允许子元素换行 */
            justify-content: flex-start;
            /* 子元素左对齐 */
        }
        .quick {
            text-align: center;
            border: 1px solid black; /* 黑色边框线 */
            padding: 10px; /* 添加内边距，使内容与边框有间距 */
            border-radius: 1px; /* 圆角边框 */
            float: left;
            width: calc(33.33% - 20px); /* 每个 div 占据 33.33% 的宽度，减去 20px 的间距 */;
            margin: 20px 10px; /* 上下间距为 10px，左右间距为 10px */;
        }

        .quick > div:first-child {
            color: rgb(55, 78, 207); /* 标题蓝色 */
            font-size: 18px; /* 标题 18px 字体 */
            font-weight: bold; /* 标题加粗 */
            margin-bottom: 10px; /* 标题与图片之间的间距 */
        }

        .quick > div:last-child {
            color: #598dee;
            font-size: 14px; /* 摘要 14px 字体 */
            margin-top: 10px; /* 图片与摘要之间的间距 */
        }

        .quick img {
            max-width: 100%; /* 图片宽度自适应容器 */
            height: auto; /* 保持图片比例 */
        }
        .dropdown-right ul {
            list-style-type: none;
           width: 30%;
            margin-right: 10px;
            /* 给每个 ul 元素添加右外边距，使它们之间有间隔 */
        }

        .dropdown-right ul li {
            margin-bottom: 5px;
            padding-top: 10px;
            
        }

        
        .dropdown-right ul li a {
            color: #598dee;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .jc {
            color: rgb(55, 78, 207);
            font-size: 16px;
            padding: 10px 0px;
            font-weight: bold;
            text-decoration: none;
            /*border-bottom: 2px solid black;*/
        }
        .line {
            border-bottom: 2px solid black;
        }
        .dropdown-right ul li a:hover {
            color: #c52c06;
            /* 右侧链接悬停颜色 */
        }
        .social-icons a {
                        margin: 15px 10px; /* 设置左右间隔为 10px */
                        display: inline-block; /* 让链接元素以行内块级元素显示 */
                    }

                    .social-icons a img {
                        vertical-align: middle; /* 垂直居中图标 */
                        transition: transform 0.3s ease; /* 添加过渡效果 */
                    }

                    .social-icons a img:hover {
                        transform: scale(1.1); /* 鼠标悬停时放大图标 */
                    }
        .image-background {           
            background-size: cover;
            background-position: center;
            height: 680px;
        }
        .about-background {           
            background-size: cover;
            background-position: center;
            height: 485px;
        }
        .text-center {
            text-align: center;
            margin-top: 100px; /* 调整顶部间距 */
            color: #333; /* 文本颜色 */
            font-size: 45px; /* 文本大小 */
        }
        .product-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
            margin-top: 100px;
        }

       .img-card {
            height: 100%;
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.125);
            border-radius: 0.25rem;
            overflow: hidden;
        }
        .img-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
        }
        .img-container {
            height: 200px;
            background-size: cover;
            background-position: center;
        }
        .img-content {
            padding: 1.25rem;
        }
        .img-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #333;
        }
        .img-desc {
            color: #6c757d;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        a.img-link {
            text-decoration: none;
        }
        a.img-link:hover .img-title {
            color: #0d6efd;
        }
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000; /* 确保 header 在其他元素之上 */
        }

        main {
            margin-top: 100px; /* 调整这个值以匹配 header 的高度 */
        }
        
    .about-section h2 {
        margin-bottom: 20px;
        font-size: 40px;
    }

    .about-section p {
        margin-bottom: 30px;
        font-size: 25px;
    }

    .about-section .btn-primary {
        background-color: #e9530e;
        border-color: #e9530e;
    }

    .about-section .btn-primary:hover {
        background-color: #dac3bd;
        border-color: #dac3bd;
    }
    .container.about1-container {
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 200px 0;
    }
    .about1-section{
        text-align: center; 
             
    }
.about1-section h2 {
        margin-bottom: 20px;
        font-size: 45px;
        color: rgb(37, 136, 218);
        font-weight: normal;
    }

.about1-section p {
        margin-bottom: 30px;
        font-size: 22px;        

    }
.about2-section{
        width: 50%;
        float: left;
        display: grid;
    }
.about2-section h2 {
        margin-bottom: 20px;
        font-size: 45px;
        color: rgb(37, 136, 218);
        font-weight: normal;
    }   

.about2-section p {
        margin-bottom: 30px;
        font-size: 22px;
    }
.about3-section {
        transition: all 0.3s ease; /* 添加过渡效果 */
        width: 40%; /* 设置宽度为 30% */
        float: left; /* 向左浮动 */
        margin: 40px; /* 设置底部间距为 20px */
        padding: 20px; /* 设置内边距为 20px */
        box-sizing: border-box; /* 包含内边距和边框 */
    }

    .about3-section h2 {
        font-size:26px;
        color: black; /* 设置 h2 颜色为黑色 */
        border-bottom: 2px solid rgb(228, 107, 8);
    }

    .about3-section p {
        color: gray; /* 设置 p 颜色为灰色 */
        font-size: 18px;
    }

    .about3-section:hover {
        border: 1px solid #7a2020; /* 鼠标悬停时显示边框 */
        transform: scale(1.03); /* 鼠标悬停时放大 5% */
        background: #f7f1e5;
    }

    .endleft {line-height: 300px;
        
    }
    .endlist{
        width: 100%;
        margin-top: 50px;
    }
    .endlist li {
        list-style-type: none;        
        padding: 0;
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        line-height: 65px;
    }
   .footer-bottom{ text-align: center;line-height: 50px;}
   .logobg img {
    height: 100px;
    line-height:100px;
    width: auto;
    display: flex;
   }