* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", Arial, sans-serif;
        }

        ul {
            list-style: none;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        img {
            max-width: 100%;
            display: block;
        }

        /* 1. 版心修改：1200px 改为 1400px */
        .container {
            width: 1400px;
            margin: 0 auto;
            padding: 10px 20px;
        }

        :root {
            --blue-dark: #1668c4;
            --blue-light: #69b1ff;
            --text-gray: #555;
            --text-dark: #222;
            --white: #ffffff;
        }

        .top-bar {
            background: #f7f7f7;
            border-bottom: 1px solid #eee;
            padding: 12px 0;
            font-size: 14px;
            color: #555;
        }

        .top-bar-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .top-left span {
            margin-right: 25px;
        }

        .top-left i {
            color: #5ba8ec;
            margin-right: 6px;
        }

        /* 已彻底删除语言下拉所有样式 & DOM */

        .header-nav {
            background: #ffffff;
            padding: 18px 0;
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 999;
        }

        .nav-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo img {
            height: 50px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-menu > li {
        position: relative;
    font-size: 19px;
    color: #333;
    padding: 8px 10px;
    font-weight: 500;
}

.nav-menu > li > a {
    display: block;
    padding: 6px 0;
}

/* 伪元素：底部下划线 默认隐藏 */
.nav-menu > li::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 3px;
    background-color: #5ba8ec;
    border-radius: 2px;
    transform: translateX(-50%);
    transition: all 0.3s ease;
}

/* 鼠标悬浮：下划线展开 */
.nav-menu > li:hover::after {
    width: 80%;
}
.nav-menu > li:hover > a {
    color: #5ba8ec;
}

/* 当前激活页面：永久显示完整下划线 + 文字变色加粗 */
.nav-menu > li.active::after {
    width: 80%;
}
.nav-menu > li.active > a {
    color: #5ba8ec;
    font-weight: 600;
}


        

        .submenu {
            position: absolute;
            top: 100%;
            left: 0;
            width: 180px;
            background: #fff;
            border: 1px solid #eee;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
            display: none;
            z-index: 99;
        }

        .nav-menu > li:hover .submenu {
            display: block;
        }

        .submenu li a {
            display: block;
            padding: 10px 16px;
            font-size: 14px;
            color: #333;
        }

        .submenu li a:hover {
            background: #f0f7ff;
            color: #5ba8ec;
        }

        /* 3. 搜索框整体重构：标准椭圆圆角一体搜索栏 */
        .search-box {
            display: flex;
            align-items: center;
            border: 1px solid var(--blue-light);
            border-radius: 999px;
            padding: 5px;
            background: #fff;
            width: 250px;
        }

        .search-box input {
            flex: 1;
            padding: 8px 16px;
            font-size: 14px;
            border: none;
            background: transparent;
        }
        .search-box input::placeholder {
            color: #999;
        }

        .search-box button {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: #5ba8ec;
            color: #fff;
            cursor: pointer;
            border: none;
            transition: 0.3s;
        }
        .search-box button:hover {
            background: #0e57a8;
        }



/* 页脚样式重构：顶部通栏悬浮蓝色横幅 */
footer {
    background: #f8fafc;
    
    background-size: cover;
    background-position: center;
    /* 关键：给footer开启相对定位，作为悬浮块参照物 */
    position: relative;
    padding-top: 90px; /* 给悬浮横幅预留下沉空间 */
        margin-top: 50px;
}

/* 通栏蓝色横幅盒子 核心悬浮样式 */
.footer-top-banner {
    width: 94%;
    max-width: 1400px;
    margin: 0 auto;
    background: #0d1e32;
    border-radius: 8px;
    padding: 32px 36px;
    color: #fff;
    position: absolute;
    left: 50%;
    top: -65px;
    transform: translateX(-50%);
    z-index: 10;
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* ==========核心：内部容器开启横向flex========== */
.banner-inner {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 50px;
    width: 100%;
}

/* 左侧文字区域：自适应占空间 */
.banner-left {
    flex: 1;
}
/* 右侧输入框+按钮：禁止被挤压缩小 */
.banner-right {
    flex-shrink: 0;
    display: flex;
}

/* 仅新增标签栏基础样式，复用网站原有颜色变量 */
        .service-tab-wrap {
            border-bottom: 1px solid #eee;
            margin-bottom: 40px;
        }
        .service-tabs {
            display: flex;
            max-width: 1400px;
            margin: 0 auto;
        }
        .service-tab-item {
            padding: 24px 32px;
            font-size: 18px;
            cursor: pointer;
            transition: 0.3s;
            color: #333;
            border-bottom: 3px solid transparent;
            text-decoration: none;
        }
        .service-tab-item.active {
            background: #5ba8ec;
            color: #fff;
            border-bottom-color: #5ba8ec;
        }
        .service-tab-item:hover:not(.active) {
            color: #5ba8ec;
        }
        .tab-content-box {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px 60px;
            font-size: 16px;
            line-height: 1.8;
            color: #444;
        }

.banner-left h3 {
    font-size: 32px;
    margin-bottom: 8px;
}
.banner-left h3 span {
    color: #ffd700;
}
.banner-left p {
    color: rgba(255,255,255,0.88);
    font-size: 16px;
}

.banner-right {
    display: flex;
}
.banner-right input {
    width: 340px;
    padding: 15px 22px;
    border: none;
    border-radius: 99px 0 0 99px;
    font-size: 15px;
    outline: none;
}
.banner-right button {
    padding: 15px 32px;
    background: #53a9eb;
    color: #fff;
    border: none;
    border-radius: 0 99px 99px 0;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s;
}
.banner-right button:hover {
    background: #3492d8;
}

/* footer四列内容区域 */
.footer-content {
    padding: 40px 0 30px;
    background: transparent;
}

.footer-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo img {
    height: 55px;
    margin-bottom: 15px;
}

.footer-col p {
    font-size: 15px;
    color: #555;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #5ba8ec;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: 0.3s;
}
.footer-social a:hover {
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 20px;
    margin-bottom: 22px;
    color: #222;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 15px;
    color: #555;
    transition: 0.3s;
}
.footer-col ul li a:hover {
    color: #5ba8ec;
}

.footer-col .contact-item {
    font-size: 15px;
    color: #555;
    margin-bottom: 12px;
    line-height: 1.6;
}

.footer-col .contact-item i {
    color: #5ba8ec;
    margin-right: 8px;
}

.copyright {
    text-align: center;
    padding-top: 15px;
    border-top: none;
    background: transparent;
    font-size: 15px;
    color: #444;
    padding-bottom: 15px;
    font-weight: 500;
}
/* 页脚列表项前面添加 » 符号 */
.footer-col ul li::before {
    content: "»";
    color: #222;
    margin-right: 10px;
    font-weight: 500;
}


 /* Tab面板切换基础样式：所有面板都自带上下边距 */
        .tab-panel{
            display:none;
            margin-top: 60px;
            margin-bottom: 120px;
        }
        .tab-panel:first-of-type{
            display:block;
        }
        .solution-content{
            max-width:1400px;
            margin:0 auto 80px;
            padding:0 20px;
        }
        /* 方案卡片排版 两栏布局 和截图一致 */
        .solution-card-row{
            display:grid;
            grid-template-columns: 1fr 1fr;
            gap:48px;
            row-gap: 52px;
        }
        .solution-card{
            display:flex;
            align-items:center;
            gap:28px;
            text-decoration:none;
            color:#222;
            transition: all 0.3s ease;
        }
        .solution-card:hover{
            transform: translateY(-4px);
        }
        .card-img{
            width:270px;
            height:165px;
            flex-shrink:0;
            overflow:hidden;
            border-radius:6px;
        }
        .card-img img{
            width:100%;
            height:100%;
            object-fit:cover;
            transition: transform 0.4s ease;
        }
        .solution-card:hover .card-img img{
            transform: scale(1.06);
        }
        .card-text h3{
            font-size:26px;
            margin:0 0 12px;
            font-weight: 600;
        }
        .card-text p{
            font-size:16px;
            color:#444;
            line-height:1.65;
            margin:0;
        }

        /* 完全复刻截图顶部标签导航样式 */
        .service-tab-wrap {
            width: 1400px;
            margin: 0 auto;
            border-bottom: 1px solid #eeeeee;
        }
        .service-tabs {
            display: flex;
            width: 100%;
            height: 75px;
        }
        .service-tab-item {
            flex: 1;
            padding: 16px 10px;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s ease;
            color: #000000;
            background: #ffffff;
            white-space: nowrap;
            border: none;
            outline: none;
            text-align: center;
        }
        /* 激活选中样式：蓝色背景+白色文字 */
        .service-tab-item.active {
            background: #67aeed;
            color: #ffffff;
        }
        /* 悬浮未激活样式 */
        .service-tab-item:hover:not(.active) {
            color: #1565C0;
        }

        /* 移动端适配 */
        @media(max-width:1450px){
            .service-tab-wrap {
                width: 100%;
                padding: 0 20px;
            }
        }
        @media(max-width:1200px){
            .service-tab-item{
                padding: 14px 8px;
                font-size: 14px;
            }
        }
        @media(max-width:992px){
            .solution-card-row{
                grid-template-columns:1fr;
            }
            .solution-card{
                flex-direction:column;
                align-items:flex-start;
            }
            .card-img{
                width:100%;
                height:210px;
            }
            /* 手机端改为横向滚动 */
            .service-tabs{
                flex-wrap: nowrap;
                overflow-x: auto;
                scrollbar-width: none;
            }
            .service-tabs::-webkit-scrollbar{display:none;}
            .service-tab-item{flex:none; padding:14px 20px;}
        }
        @media(max-width:576px){
            .service-tab-item{
                padding:12px 16px;
                font-size: 13px;
            }
        }





        /* 详情页整体容器 */
        .solution-detail-wrap {
            max-width: 1400px;
            margin: 40px auto 60px;
            padding: 0 20px;
        }
        /* 白色卡片盒子：圆角+阴影 */
        .detail-content-box {
            background: #ffffff;
            border-radius: 16px;
            box-shadow: 0 0 18px rgba(0,0,0,0.06);
            padding: 50px 60px;
                margin-bottom: 90px;
        }
        /* 标题居中 */
        .detail-title {
            text-align: center;
            font-size: 32px;
            color: #111;
            margin: 0 0 30px;
            font-weight: 600;
        }
        /* 正文描述样式 */
        .detail-desc p {
            font-size: 17px;
            line-height: 1.75;
            color: #333;
            margin: 0 0 40px;
        }
        /* 上一页、下一页链接 */
        .prev-next-link p {
            font-size: 16px;
            margin: 10px 0;
        }
        .prev-next-link a {
            color: #222;
            text-decoration: none;
        }
        .prev-next-link a:hover {
            color: #2578d9;
        }


        /* 顶部Banner */
        .page-banner{
            width: 100%;
            height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 50px;
        }
        .page-banner h1{
            color: #ffffff;
            font-size: 62px;
            font-weight: 500;
            position: relative;
        }
        .page-banner h1::after{
            content: "";
            width: 80px;
            height: 3px;
            background: #fff;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: -12px;
        }

        /* 整体页面三栏布局 */
        .wrap{
            max-width: 1400px;
            margin: 0 auto 120px;
            padding: 0 20px;
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 38px;
            align-items: start;
        }

        /* 中间主白色大卡片 */
        .main-card{
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            border: 1px solid #eee;
            padding: 30px;
        }
        /* 卡片上半部分：左图 + 右侧参数文字区域 并排 */
        .card-top{
            display: grid;
            grid-template-columns: 320px 1fr;
            gap: 30px;
            margin-bottom: 25px;
        }
        .card-top img{
            width: 100%;
            border-radius: 6px;
            display: block;
        }
        /* 参数文字区域 */
        .param-text-area p{
            margin:6px 0;
            font-size:16px;
        }
        /* 下方产品详情正文 */
        .article-desc{
            line-height: 1.8;
            font-size: 16px;
            color:#444;
            text-align: justify;
        }

        /* 右侧侧边栏通用模块 */
        .sidebar-box{
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            border: 1px solid #eee;
            overflow: hidden;
            margin-bottom: 30px;
        }
        .sidebar-box h3{
            background-color: #2379d2;
            color: #fff;
            margin: 0;
            padding: 16px 22px;
            font-size: 20px;
        }
        .box-content{
            padding: 22px;
        }
        .box-content p{
            margin:8px 0;
            line-height:1.6;
        }
        .tag-item{
            display:block;
            margin:7px 0;
            color:#333;
            text-decoration:none;
        }
        .tag-item:hover{
            color:#2379d2;
        }

        /* 平板适配 */
        @media(max-width:1200px){
            .wrap{
                grid-template-columns: 1fr;
            }
            .card-top{
                grid-template-columns: 1fr;
            }
        }
        /* 手机端 */
        @media(max-width:768px){
            .page-banner h1{
                font-size: 40px;
            }
        }


        /* 顶部通栏Banner */
        .page-banner{
            width:100%;
            height:260px;
            background:#c8daf0;
            display:flex;
            align-items:center;
            justify-content:center;
        }
        .page-banner h1{
            font-size:60px;
            color:#fff;
            position:relative;
        }
        .page-banner h1::after{
            content:"";
            width:75px;
            height:3px;
            background:#fff;
            position:absolute;
            left:50%;
            transform:translateX(-50%);
            bottom:-10px;
        }
        /* 主体左右布局容器 */
        .main-container{
            max-width:1400px;
            margin:60px auto 120px;
            padding:0 20px;
            display:grid;
            grid-template-columns:260px 1fr;
            gap:40px;
        }
        /* 左侧栏目侧边栏 */
        .left-sidebar .sidebar-title{
            background:#2478d1;
            color:#fff;
            padding:16px 20px;
            font-size:20px;
            font-weight:bold;
        }
        .sidebar-nav{
            background:#f7f8fa;
        }
        .sidebar-nav a{
            display:block;
            padding:14px 20px;
            color:#333;
            text-decoration:none;
            border-bottom:1px solid #eee;
            font-size:16px;
        }
        .sidebar-nav a.active{
            background:#2478d1;
            color:#fff;
        }
        .sidebar-nav a:hover:not(.active){
            background:#e9f2fd;
        }
        /* 右侧产品区域 一行3列 */
        .product-grid{
            display:grid;
            grid-template-columns: repeat(3, 1fr);
            gap:30px;
            row-gap:40px;
        }
        .product-card{
            border:1px solid #eee;
            border-radius:8px;
            overflow:hidden;
            transition:all 0.3s;
            text-decoration:none;
        }
        .product-card:hover{
            transform:translateY(-5px);
            box-shadow:0 6px 18px #e0e9f7;
        }
        .product-card img{
            width:100%;
            height:220px;
            object-fit:cover;
        }
        .product-card p{
            padding:15px;
            margin:0;
            text-align:center;
            color:#222;
            font-size:16px;
            line-height:1.5;
        }
        /* 移动端 */
        @media(max-width:992px){
            .main-container{grid-template-columns:1fr;}
            .product-grid{grid-template-columns:repeat(2,1fr);}
        }
        @media(max-width:576px){
            .product-grid{grid-template-columns:1fr;}
        }


        /* Banner头部 */
        .page-banner{
            width:100%;
            height:320px;
            display:flex;
            align-items:center;
            justify-content:center;
            margin-bottom:60px;
        }
        .page-banner h1{
            font-size:64px;
            color:#fff;
            position:relative;
        }
        .page-banner h1::after{
            content:"";
            width:80px;
            height:3px;
            background:#fff;
            position:absolute;
            left:50%;
            transform:translateX(-50%);
            bottom:-12px;
        }
        /* 品牌容器 */
        .brand-wrap{
            max-width:1400px;
            margin:0 auto 120px;
            padding:0 20px;
        }
        .brand-grid{
            display:grid;
            /* 桌面端一行5个 */
            grid-template-columns: repeat(6, 1fr);
            gap:24px;
            row-gap:32px;
        }
        .brand-item{
            background:#fff;
            padding:26px 14px;
            border-radius:10px;
            box-shadow:0 2px 12px #eee;
            text-decoration:none;
            display:flex;
            flex-direction:column;
            align-items:center;
            transition:all 0.3s ease;
            height: 100%;
        }
        .brand-item:hover{
            transform:translateY(-6px);
            box-shadow:0 8px 20px #e1e9f5;
        }
        /* Logo适配窄卡片，大小适中 */
        .brand-item img{
            max-width:86%;
            max-height:65px;
            object-fit:contain;
            
        }
        /* 文字自动换行，不溢出盒子，行高舒适 */
        .brand-item p{
            margin:0;
            font-size:14px;
            color:#222;
            text-align:center;
            line-height: 1.5;
            word-break: break-all;
        }
        /* 移动端逐级缩减列数 */
        @media(max-width:1200px){
            .brand-grid{grid-template-columns:repeat(4,1fr);}
        }
        @media(max-width:992px){
            .brand-grid{grid-template-columns:repeat(3,1fr);}
        }
        @media(max-width:768px){
            .brand-grid{grid-template-columns:repeat(2,1fr);}
        }
        @media(max-width:576px){
            .brand-grid{grid-template-columns:1fr;}
        }