@charset "utf-8";
/* CSS Document */

       * {
            margin: 0;
            padding:0;
            box-sizing: border-box;
            font-family: 'Arial', 'Inter', 'Roboto', 'Open Sans', 'Helvetica Neue', sans-serif;
            letter-spacing: 0.02em;
            line-height: 1.6;
		 
        }
        body {
            background: #fff;
            color: #333;
            margin: 0;
            padding: 0;
            min-width: 320px; /* 防止手机端内容溢出 */
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            object-fit: cover; /* 保持图片比例，避免变形 */
        }
        #backToTop {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 60px;
            background: #308edb;
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 9999;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        #backToTop.show {
            opacity: 1;
            visibility: visible;
        }
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
            will-change: opacity, transform;
        }
        .fade-in-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        header {
            background: #fff;
            color: #7e7e7e;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: auto;
            background-image: url("../images/bg.jpg");
            background-position: center;
            background-size: cover;
            flex-wrap: wrap;
            gap: 10px;
            margin: 0;
        }
        .logo {
            font-size: 24px;
            font-weight: bold;
            color: #333333;
            display: flex;
            align-items: center;
            gap: 12px;
            white-space: nowrap;			
        }
        .logo ul {
            list-style: none;
            display: flex;
            align-items: center;
            margin: 0;
            padding: 0;
            gap: 12px;
            white-space: nowrap;
        }
        .logo_lef {
            width: clamp(120px, 20vw, 200px);
        }
        .header-contact {
            font-size: 14px;
            line-height: 1.8;
            display: flex;
            align-items: center;
            gap: 20px;
            white-space: nowrap;
            margin-left: auto;
        }
        .header-contact span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
      
	  

      
	  
	  

	  
	  
	  
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(3px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .menu-toggle {
            display: block;
            color: #fff;
            font-size: 20px;
            cursor: pointer;
            padding: 10px 20px;
            background: #0a3d62;
            text-align: right;
            transition: background 0.3s ease;
        }
        .menu-toggle:hover {
            background: #1e6ba0;
        }
        @media (max-width: 768px) {
         
            header {
                justify-content: center;
                text-align: center;
            }
            .header-contact {
                justify-content: center;
                width: 100%;
                margin-left: 0;
                flex-wrap: wrap;
                gap: 10px;
            }
            .logo {
                font-size: clamp(24px, 6vw, 32px);
            }
            /* 手机端分类项适配 */
            .class-item {
                min-width: 110px;
                max-width: 140px;
                height: 110px;
            }
            /* 手机端一站式解决方案标题适配 */
            .one-stop h2 {
                padding-left: 20px;
                text-align: center;
            }
            /* 手机端供应商logo适配 */
            .supplier-logos img {
                flex: 0 0 calc((100% - 20px) / 2);
                min-width: 120px;
            }
        }
        @media (min-width: 769px) {
            header {
                height: clamp(80px, 10vw, 80px);
                padding: 0 20px;
            }

        }
        .banner {
            position: relative;
            width: 100%;
            height: clamp(180px, 40vw, 500px);
            overflow: hidden;
            margin: 0;
        }
        .banner-wrapper {
            position: relative;
            width: 100%;
            height: 100%;
        }
        .banner-item {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            opacity: 0;
            transition: opacity 1s ease-in-out;
        }
        .banner-item.active {
            opacity: 1;
            z-index: 2;
        }
        .banner-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .banner-text.left, .banner-text.right {
            position: absolute;
            top: 50%;
            padding: 0 20px;
            transform: translateY(-50%);
            color: #fff;
            max-width: 80%;
            opacity: 0;
            transition: all 1s ease 0.3s;
            text-shadow: 0 2px 6px rgba(0,0,0,0.5);
        }
        .banner-text.left {
            left: 0;
            transform: translateX(20px) translateY(-50%);
        }
        .banner-text.right {
            right: 0;
            transform: translateX(-20px) translateY(-50%);
        }
        .banner-item.active .banner-text.left,
        .banner-item.active .banner-text.right {
            opacity: 1;
            transform: translateX(0) translateY(-50%);
        }
        .banner-text h1 {
            font-size: clamp(16px, 4vw, 28px);
            line-height: 1.4;
        }
        .banner-dots {
            position: absolute;
            bottom: 10px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 6px;
            z-index: 10;
        }
        .banner-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: rgba(255,255,255,0.5);
            cursor: pointer;
        }
        .banner-dot.active {
            background: #fff;
        }
        .class-section {
            padding: 30px 15px;
            text-align: center;
            max-width: 1200px;
            margin: 0 auto;
        }
        .class-section h2 {
            color: #0a3d62;
            margin-bottom: 20px;
            font-size: clamp(32px, 3vw, 32px);
        }
        .class-items {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            width: 100%;border-bottom: 2px solid #f4f7ff;
        }
        .class-item {
            text-align: center;
            padding: 15px 10px;
            cursor: pointer;
            transition: 0.3s;
            min-width: 140px;
            max-width: 160px;
            flex: 1 1 130px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 120px;
        }
        .class-item .icon {
            font-size: clamp(24px, 4vw, 30px);
            margin-bottom: 12px;
            color: #474747;
            width: 45px;
            height: 45px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .class-item .icon img {
            margin: 0 auto;
            max-width: 100%;
            max-height: 100%;
        }
        .class-item span {
            font-size: 16px;
            color: #474747;
            display: block;
            width: 100%;
            height: 30px;
            line-height: 1.4;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            word-break: break-all;
            transition: color 0.3s ease;
        }
        .class-item:hover span {
            font-weight: bold; color: #0a3382;
        }
        .class-item.active span {
            font-weight: bold; color: #0a3382;
        }
        .class-item.active {
          font-weight: bold;   border-bottom: 2px solid #0a3382;
        }
        .class-content-wrapper {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
            overflow: hidden;
        }
        .class-content {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: flex-start;
            text-align: left;
            background-color: #f4f7ff;
            border-radius: 8px;
            padding: 10px 15px;
            transition: opacity 0.3s ease;
        }
        .class-text {
            flex: 1 1 100%;
            align-self: flex-start;
        }
        .class-text h3 {
            color: #0a3d62;
            margin-bottom: 10px;
            font-size: clamp(28px, 2.5vw, 22px);
        }
        .class-text p, .class-text ul {
            font-size: clamp(12px, 1.8vw, 14px);
            margin-bottom: 10px;
        }
        .class-text ul {
            margin-left: 20px;
        }
        .class-img {
            flex: 1 1 100%;
            position: relative;
            height: 300px;
            overflow: hidden;
        }
        .class-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
       .one-stop {
            padding: 30px 15px;
            background: #fff;
            background-image: url(../images/a15.jpg);
            background-position: center;
            background-size: cover; background-image: 
                url(../images/a15.jpg),
                url(../images/a16.jpg);
            background-position: top center, bottom center;
            background-repeat: no-repeat, no-repeat;
            background-size: 100% 200px, 100% 200px;
        }
        .one-stop h2 {
            color: #0a3d62;
            margin-bottom: 20px;
            font-size: clamp(32px, 3vw, 32px);
             text-align: center;
        }
        .solution-item {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 30px;
            align-items: center;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }
        .solution-img, .solution-text {
            flex: 1 1 100%;
        }
        @media (min-width: 768px) {
            .class-text, .class-img {
                flex: 1 1 300px;
            }
            .solution-img, .solution-text {
                flex: 1 1 300px;
            }
        }
        .solution-text h3 {
            color: #0a3d62;
            margin-bottom: 10px;
           font-size: 24px
        }
        .solution-text p {
            font-size: clamp(12px, 1.8vw, 14px);
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .btn {
              display: inline-block;
            width: 100px; /* 固定宽度100px */
            padding: 6px 0; /* 取消左右内边距，适配固定宽度 */
            text-align: center; /* 文字居中 */
            background: #ffffff;
            color: #0076d6;
            text-decoration: none;
            border-radius: 4px;
            font-size: clamp(12px, 1.8vw, 14px);
            transition: background 0.3s ease; 
            border:1px solid #0076d6;
            cursor: pointer; /* 按钮保留指针 */
        }
        .btn:hover {
         background: #0076d6;color: #fff;
        }
        .about-us {
            display: flex;
            flex-wrap: wrap;
            padding: 30px 15px;
            gap: 20px;
            background-image: url(../images/a14.jpg);
            background-position: center;
            background-size: cover;
            color: #fff;
        }
        .about-img, .about-text {
            flex: 1 1 100%;
            max-width: 1200px;
            margin: 0 auto;
        }
        @media (min-width: 768px) {
            .about-img, .about-text {
                flex: 1 1 400px;
            }
        }
        .about-text h3 {
            margin-bottom: 10px;
            font-size: clamp(32px, 2.5vw, 22px);
        }
        .about-text p {
            font-size: clamp(12px, 1.8vw, 14px);
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .supplier {
            padding: 30px 15px;
            text-align: center;
            max-width: 1400px;
            margin: 0 auto;
        }
        .supplier h3 {
            color: #0a3d62;
            margin-bottom: 20px;
            font-size: clamp(32px, 2.5vw, 22px);
        }
        .supplier-logos {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
            width: 100%;
            box-sizing: border-box;
        }
        .supplier-logos img {
            height: 70px;
            width: 200px;
            flex: 0 0 200px;
            min-width: 150px;
            max-width: 200px;
            border: 1px #b4b4b4 solid;
            object-fit: contain;
            padding: 5px;
        }
        footer {
            background: #333;
            color: #fff;
            padding: 30px 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
            justify-content: flex-start;
            width: 100%;
            margin: 0;
        }
        .footer-col {
            flex: 1 1 280px;
            min-width: 280px;
            max-width: 500px;
		color: #fff; text-decoration: none;
        }
    .footer-col a {
            
		color: #fff; text-decoration: none;
        }

    .footer-col a href{
            
		color: #3498db; text-decoration: none;
        }


        .footer-col h4 {
            margin-bottom: 15px;
            font-size: clamp(32px, 2vw, 16px);
            font-weight: bold;
            margin-left: 60px;
        }
        .footer-col p, .footer-col ul li {
            font-size: clamp(14px, 1.6vw, 13px);
            line-height: 1.8;
            margin: 6px 0;
            margin-left: 60px;
            padding: 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .copyright {
            text-align: left;
            padding: 12px 20px;
            background: #222;
            color: #aaa;
            font-size: clamp(14px, 1.5vw, 12px);
            width: 100%;
            margin: 0;
            border-top: 1px solid #444;
            padding-left: 80px;
        }
        @media (max-width: 992px) {
            .footer-col h4, .footer-col p, .footer-col ul li {
                margin-left: 40px;
            }
            .copyright {
                padding-left: 60px;
            }
        }
        @media (max-width: 768px) {
            .footer-col h4, .footer-col p, .footer-col ul li {
                margin-left: 20px;
            }
            .copyright {
                padding-left: 40px;
            }
        }
		
		


        /* 标题统一样式：粗体+深灰+层级字号 */
        h1 { font-size: 32px; font-weight: 700; }
        h2 { font-size: 26px; font-weight: 700; color:#0a3d62}
        h3 { font-size: 16px; font-weight: 600; }
        /* 正文/列表：常规字重+浅灰+统一字号 */
        p, li { font-size: 16px; font-weight: 400; }
        ul { padding-left: 20px; list-style: disc; }
        /* 间距类：标准化外边距，避免杂乱 */
        .mb-10 { margin-bottom: 10px; }
        .mb-15 { margin-bottom: 15px; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .mt-40 { margin-top: 40px; }
        /* Banner区域：背景高400px+可替换+文字白色+居中，单独收紧内部行间距 */
        .banner1 {
            position: relative;
            width: 100%;
            height: 280px; /* 头部Banner背景图高度设为280px */
            background: url('../images/about.jpg') no-repeat center center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
        .banner-content {
            line-height: 1.2; /* 收紧Banner内文字行间距，图标/标题/面包屑更紧凑 */
        }
        .banner-content * { color: #ffffff; } /* Banner内文字强制白色 */
        .banner-icon img {
            width: 45px; /* 小房子小图标固定宽度60px */
            height: auto; /* 高度自适应，不拉伸变形 */
            display: block;
            margin: 0 auto 5px; /* 图标底部留10px间距，与标题紧凑衔接 */
        }
        .banner h1 {
         font-size:40px; /* 标题与面包屑间距收紧，保留少量空隙 */
        }
        .banner .breadcrumb { font-size: 18px; opacity: 0.9; }
		
		 .banner2 {
            position: relative;
            width: 100%;
            height: 280px; /* 头部Banner背景图高度设为280px */
            background: url('../images/process.jpg') no-repeat center center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
		
		.banner3{
            position: relative;
            width: 100%;
            height: 280px; /* 头部Banner背景图高度设为280px */
            background: url('../images/Food.jpg') no-repeat center center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
			.banner4{
            position: relative;
            width: 100%;
            height: 280px; /* 头部Banner背景图高度设为280px */
            background: url('../images/equipment.jpg') no-repeat center center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
		
		.banner5{
            position: relative;
            width: 100%;
            height: 280px; /* 头部Banner背景图高度设为280px */
            background: url('../images/Fluid.jpg') no-repeat center center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
			.banner6{
            position: relative;
            width: 100%;
            height: 280px; /* 头部Banner背景图高度设为280px */
            background: url('../images/Contact.jpg') no-repeat center center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }
		
		
        /* 内容区域：统一内边距 */
        .content {
            padding: 40px 0;
            width: 100%;
        }
        /* 左图右文：左右布局+自适应，左侧图固定400px */
        .about-row {
            display: flex;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 30px; /* 图文间距标准化 */
            margin-bottom: 20px;
        }
         .about-img1 {
            width: 400px; /* 固定左侧小图宽度400px */
            flex: 0 0 auto; /* 取消弹性缩放，固定宽度 */
			
        }
        .about-img img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }
        .about-text {
            flex: 1;
            min-width: 300px;
        }
        /* 业务/优势/愿景区域：统一排版+层级 */
        .business-section {
            width: 100%;
        }
        .advantage-list li {
            margin-bottom: 10px;
        }
        .vision-text {
            margin-top: 20px;
            padding-top: 10px;
            border-top: 1px solid #f0f0f0;
        }
        /* 底部区域：图片固定1000px+版权 统一排版，保留自适应 */
        .bottom-area {
            width: 100%;
            margin-top:10px;
        }
        .bottom-img-box {
            width: 1000px; /* 固定底部大图宽度1000px */
            max-width: 100%; /* 响应式关键：屏幕小于1000px时占满屏幕 */
        }
        .bottom-img-box img {
            width: 100%;
            height: auto;
            display: block;
            margin-bottom: 15px;
        }
        .copyright {
            font-size: 13px;
            text-align: left;

        }
        /* 响应式适配：手机端自动重排+字号/Banner高度自适应 */
        @media (max-width: 768px) {
            /* Banner适配：高度按比例缩小，文字/图标间距仍紧凑 */
            .banner { height: 200px; } /* 手机端Banner高度自适应缩小为200px，比例协调 */
            .banner h1 { font-size: 26px; }
            .banner .breadcrumb { font-size: 16px; }
            .banner-icon img { width: 50px; } /* 手机端图标稍缩为50px，更适配小屏幕 */
            /* 图文布局：手机端上下排列，图片占满屏幕 */
            .about-row { flex-direction: column; gap: 20px; }
            .about-img { width: 100%; } /* 手机端左侧图取消400px，占满屏幕 */
            /* 字号适配：手机端缩小标题 */
            h2 { font-size: 18px; }
            h3 { font-size: 15px; }
            p, li { font-size: 13px; }
            /* 间距适配：手机端缩小间距 */
            .content { padding: 25px 0; }
            .mb-30 { margin-bottom: 20px; }
            .mt-40 { margin-top: 25px; }
        }
		
		
		
		
		   /* 产品网格：一排6个 */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 20px;
            margin-bottom: 30px;
        }
        .product-item {
            text-align: center;
        }
        .product-item img {
            width: 100%;
            height: auto;
            display: block;
            margin-bottom: 10px;
            border-radius: 4px;
        }
        .product-item p {
            font-size: 14px;
            color: #555;
            line-height: 1.5;
        }
        /* 响应式适配 */
        @media (max-width: 1024px) {
            .product-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        @media (max-width: 768px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-title {
                font-size: 20px;
                padding: 20px 0;
            }
            .banner {
                height: 150px;
            }
        }
        @media (max-width: 480px) {
            .product-grid {
                grid-template-columns: repeat(1, 1fr);
            }
        }
		
		
		 /* 容器样式 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
    
        }

        /* 头部区域 */
        .header-section {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 40px 0;
            gap: 40px;
        }

        .header-content {
            flex: 1;
        }

        h1 {
            font-size: 3rem;

            margin-bottom: 25px;
            line-height: 1.2;
        }

        .header-content p {
            font-size: 1.25rem;
            color: #000;
            line-height: 1.6;
        }

        .header-image {
            flex-shrink: 0;
        }

        .header-image img {
            max-width: 400px;
            height: auto;
            display: block;
			border-radius: 4px
        }

         .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            padding: 20px 0;
            width: 100%;
        }
        .benefit-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 30px 20px;
            border-radius: 8px;
            background: #f8f9fa;
            cursor: pointer;
            transition: transform 0.3s ease-in-out;
            border: 1px solid #eee;
            text-align: center;
        }
        /* 鼠标悬浮卡片向上浮动，图标始终正常显示 */
        .benefit-card:hover {
            transform: translateY(-8px);
        }
        /* 图标容器居中+固定尺寸，图标本身居中 */
        .icon-wrapper {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            flex-shrink: 0;
        }
        .icon-wrapper svg {
            width: 32px;
            height: 32px;
            fill: #fff;
            display: block;
        }
        /* 卡片文字链接样式 - 保留原有字体，加链接默认样式 */
        .benefit-card a {
            color: #333;
            text-decoration: none;
            font-size: 14px;
            line-height: 1.5;
            font-weight: 500;
        }
        .benefit-card a:hover {
            color: #308edb;
            text-decoration: underline;
        }
        /* 图标配色保留，统一命名 */
        .icon-blue { background-color: #308edb; }
        .icon-green { background-color: #4CAF50; }
        .icon-orange { background-color: #FF9800; }
        .icon-purple { background-color: #9C27B0; }
        .icon-teal { background-color: #009688; }
        .icon-amber { background-color: #FFC107; }
        /* 响应式适配 - 小屏自动缩列，保留原有布局 */
        @media (max-width: 768px) {
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 15px;
            }
            .benefit-card {
                padding: 20px 15px;
            }
            .icon-wrapper {
                width: 50px;
                height: 50px;
            }
            .icon-wrapper svg {
                width: 28px;
                height: 28px;
            }
        }
        @media (max-width: 480px) {
            .benefits-grid {
                grid-template-columns: 1fr;
            }
        }
	.solution-img {
    overflow: hidden;
    width: 50%;
    height: 350px;
}
.solution-img img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 保持图片比例，裁剪溢出部分 */
    transition: transform 0.3s ease-in-out;
	border-radius:4px;
}
.solution-img img:hover {
    transform: scale(1.08); /* 放大1.08倍，可按需调整 */
}
/* 2. 所有solution-item内的内容顶对齐，图文各占50%，无间距 */
.solution-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
    width: 100%;
}
/* 3. 文字区域顶对齐，宽度固定50%，padding留白保持美观 */
.solution-text {
    width: 50%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 0 15px; /* 左右留白，避免文字贴图片 */
    box-sizing: border-box;
}
.solution-text h3, .solution-text p {
    margin: 0 0 15px 0;
    width: 100%;
}
/* 4. Detail按钮固定宽度100px，保留原有样式 */
.solution-text .btn {
    width: 100px !important;
    display: inline-block !important;
    margin-top: auto; /* 按钮靠下，文字仍顶对齐 */
}
/* 响应式适配：移动端堆叠显示，图文宽度100%，图片高度自适应 */
@media (max-width: 768px) {
    .solution-item {
        flex-direction: column;
        align-items: stretch;
    }
    .solution-img {
        width: 100%;
        height: auto; /* 移动端取消固定高度，适配屏幕 */
    }
    .solution-text {
        width: 100%;
        padding: 15px 0 0 0;
    }
}	
	
	
	
	
	
	
	
	
	/* --- 在线客服按钮（置顶不遮挡）--- */
        .online-customer-service {
            position: fixed;
            right: 20px;
            top: 400px; /* 置顶显示 */
            background-color: #308edb;
            color: var(--text-white);
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            cursor: pointer;
            z-index: 99999 !important; /* 超高层级，避免被任何元素遮挡 */
            transition: var(--transition);
			
        }
        .online-customer-service:hover {
            background-color: #00308d;
            transform: scale(1.05);
        }
        .customer-service-icon {
            font-size: 24px;
        }
        /* --- 邮件发送弹窗（置顶不遮挡，样式不变）--- */
        .email-modal {
            position: fixed;
            right: 90px;
            top: 50%;
            transform: translateY(-50%) scale(0.9);
            opacity: 0;
            visibility: hidden;
            width: 400px;
            max-width: 90vw;
            background: white;
            border-radius: 16px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
            z-index: 99999 !important; /* 最高层级，不被遮挡 */
            transition: all 0.3s ease;
            overflow: hidden;
        }
        .email-modal.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(-50%) scale(1);
        }
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	
	  
        /* --- 全局颜色定义 --- */
        :root {
            --primary-deep: #0a3382;    /* 一级默认深蓝色背景 */
            --primary-hover: #1e6ba0;   /* 一级菜单hover浅蓝色（核心修改） */
            --secondary-hover: #666666; /* 二级菜单hover浅灰色（核心修改） */
            --text-white: #ffffff;      /* 所有默认白色文字 */
            --shadow: 0 4px 12px rgba(0,0,0,0.15); /* 通用阴影 */
            --transition: all 0.2s ease;/* 动画过渡 */
            --menu-width: 180px;        /* 一级+产品服务二级菜单统一宽度 */
            --border-radius: 4px;       /* 圆角值 */
        }
        
        /* --- 导航栏容器：一级默认深蓝底 --- */
        .nav-container {
            background-color: var(--primary-deep);
            position: relative;
            z-index: 9999; /* 低于弹窗和客服按钮层级 */
            width: 100%;
        }
        /* --- 一级菜单 (紧凑分布+均匀分配) --- */
        .nav-menu {
            list-style: none;
            display: flex;
            justify-content: space-around; /* 均匀分布 */
            align-items: center;
            height: 60px;
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 10px; /* 减少左右内边距，紧凑显示 */
            width: 100%;
        }
        .nav-item {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
            cursor: pointer;
            white-space: nowrap;
            padding: 0;
            flex: 1; /* 菜单项均分宽度 */
            justify-content: center; /* 一级文字居中 */
            margin: 0 5px; /* 菜单项之间小间距 */
        }
        .nav-link {
            color: var(--text-white);
            text-decoration: none;
            font-size: 18px; /* 一级菜单16px字体 */
            font-weight: 500;
            height: 100%;
            padding: 0 10px; /* 紧凑点击区域 */
            display: flex;
            align-items: center;
            transition: var(--transition); /* 过渡动画 */
            border-radius: 0; /* 取消圆角 */
            width: var(--menu-width); /* 一级菜单固定宽度 */
            justify-content: center; /* 一级文字强制居中 */
        }
        /* 一级菜单hover：浅蓝色（核心修改，与二级区分） */
        .nav-item:hover > .nav-link {
            background-color:#308edb;
			
            color: var(--text-white) !important;
        }
        /* --- 通用二级菜单 --- */
        .submenu {
            position: absolute;
            top: 100%;
            left: 50%; /* 水平居中 */
            transform: translate(-50%, 0); /* 无偏移 */
            background-color: var(--primary-deep);
            min-width: auto; /* 按文字自适应 */
            width: max-content; /* 宽度自适应文字 */
            max-width: 350px; /* 最大宽度限制 */
            box-shadow: var(--shadow);
            list-style: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition); /* 淡入淡出动画 */
            z-index: 9999;
            padding: 0; /* 取消内边距 */
            /* 仅底部圆角 */
            border-bottom-left-radius: var(--border-radius);
            border-bottom-right-radius: var(--border-radius);
            border-top-left-radius: 0;
            border-top-right-radius: 0;
        }
        .submenu li {
            padding: 12px 15px; /* 左右内边距统一 */
            color: var(--text-white);
            transition: var(--transition); /* hover动画 */
            border-bottom: none !important; /* 隐藏分隔线 */
            font-size: 14px;
            text-align: left; /* 文字靠左 */
            white-space: nowrap; /* 不换行 */
            line-height: 1.5;
            overflow: visible;
            margin: 0;
        }
        /* 二级菜单hover：浅灰色（核心修改，与一级区分） */
        .submenu li:hover, .submenu li.active {
            background-color:#f4f4f4;
            color: #333;
            padding-left: 15px !important; /* 强制左内边距 */
        }
        .submenu li a {
            color: inherit;
            text-decoration: none;
            display: block;
            width: 100%;
            height: 100%;
            padding: 0;
            margin: 0;
        }
        /* 一级hover显示二级：无偏移 */
        .nav-item:hover > .submenu {
            opacity: 1;
            visibility: visible;
            transform: translate(-50%, 0);
        }
        /* --- 产品服务二级菜单 --- */
        .product-service-submenu {
            width: var(--menu-width) !important; /* 与一级宽度统一 */
            max-width: var(--menu-width) !important;
            left: 50% !important; /* 居中 */
        }
        .product-service-submenu li {
            white-space: normal !important; /* 强制两行 */
            max-height: 60px !important;
            display: -webkit-box !important;
            -webkit-line-clamp: 2 !important;
            -webkit-box-orient: vertical !important;
            overflow: hidden !important;
        }
        /* --- 产品中心面板 --- */
        .product-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translate(-50%, 0); /* 居中 */
            background-color: var(--primary-deep);
            width: 1000px; /* 加宽面板，适配文字显示 */
            max-width: 95vw; /* 小屏适配 */
            box-shadow: var(--shadow);
            padding: 15px;
            display: flex;
            gap: 25px; /* 加大列间距 */
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 9999;
            flex-wrap: nowrap;
            /* 仅底部圆角 */
            border-bottom-left-radius: var(--border-radius);
            border-bottom-right-radius: var(--border-radius);
            border-top-left-radius: 0;
            border-top-right-radius: 0;
        }
        .product-column {
            flex: 1;
            min-width: 230px; /* 加宽列宽，确保文字两行显示 */
            width: auto;
            padding: 0;
            margin: 0;
        }
        /* 产品二级标题（优化两行显示） */
        .product-title {
            font-weight: bold;
            padding: 8px 15px;
            margin-bottom: 10px;
            background: none;
            color: var(--text-white);
            border-radius: 0;
            white-space: normal !important;
            max-height: 60px !important;
            display: -webkit-box !important;
            -webkit-line-clamp: 2 !important;
            -webkit-box-orient: vertical !important;
            overflow: hidden !important;
            width: 100%;
            font-size: 14px;
            text-align: left;
            line-height: 1.5;
        }
        .product-items {
            list-style: none;
            width: 100%;
            padding: 0;
            margin: 0;
        }
        /* 产品三级菜单（hover圆角4px） */
        .product-items li {
            padding: 8px 15px;
            color: var(--text-white);
            border-radius: 0 !important; /* 默认无圆角 */
            transition: var(--transition);
            white-space: normal !important;
            max-height: 60px !important;
            display: -webkit-box !important;
            -webkit-line-clamp: 2 !important;
            -webkit-box-orient: vertical !important;
            overflow: hidden !important;
            width: 100% !important; /* 强制占满列宽 */
            border-bottom: none !important; /* 隐藏分隔线 */
            font-size: 14px;
            text-align: left;
            margin: 0;
            box-sizing: border-box !important; /* 强制盒模型，padding不溢出 */
            position: relative;
            z-index: 1;
        }
        /* 产品三级hover：浅灰色+圆角4px（与二级菜单颜色一致） */
        .product-items li:hover, .product-items li.active {
            background-color: #f4f4f4;
            color: #333;
            padding: 8px 15px !important; /* 取消左右padding偏移 */
            width: 100% !important;
            box-sizing: border-box !important;
            margin: 0 !important;
            border: none !important;
            border-radius: var(--border-radius) !important; /* hover圆角4px */
        }
        .product-items li a {
            color: inherit;
            text-decoration: none;
            display: block;
            width: 100%;
            height: 100%;
            padding: 0;
            margin: 0;
        }
        /* 产品面板hover显示：无偏移 */
        .nav-item:hover .product-panel {
            opacity: 1;
            visibility: visible;
            transform: translate(-50%, 0);
        }
        /* --- 移动端汉堡菜单 --- */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 24px;
            padding: 0 20px;
            cursor: pointer;
            height: 60px;
            z-index: 10000;
        }
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                height: auto;
                align-items: flex-start;
                background-color: var(--primary-deep);
                max-width: 100%;
                padding: 10px 0;
                gap: 0;
                width: 100%;
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-item {
                width: 100%;
                padding: 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
                flex: none;
                justify-content: flex-start;
                margin: 0;
            }
            .nav-link {
                width: 100%;
                padding: 15px 20px;
                border-radius: 0;
                justify-content: flex-start;
                font-size: 16px;
            }
            /* 移动端一级菜单hover：浅蓝色 */
            .nav-item:hover > .nav-link {
                background-color: var(--primary-hover) !important;
                color: var(--text-white) !important;
            }
            .menu-toggle {
                display: flex;
                align-items: center;
            }
            .submenu, .product-panel {
                position: static;
                display: none;
                box-shadow: none;
                background-color: #082a6d;
                transform: none !important;
                max-width: 100%;
                width: 100%;
                flex-direction: column;
                gap: 0;
                padding: 0 20px;
                /* 仅底部圆角 */
                border-bottom-left-radius: var(--border-radius);
                border-bottom-right-radius: var(--border-radius);
                border-top-left-radius: 0;
                border-top-right-radius: 0;
            }
            /* 移动端产品服务二级菜单：宽度100% */
            .product-service-submenu {
                width: 100% !important;
                max-width: 100% !important;
                left: 0 !important;
            }
            .submenu li {
                color: var(--text-white);
                white-space: normal;
                word-wrap: break-word;
                border-bottom: none !important; /* 移动端隐藏分隔线 */
                font-size: 14px;
                text-align: left;
                padding: 12px 15px;
                max-height: none !important;
                display: block !important;
                -webkit-line-clamp: unset !important;
            }
            /* 移动端二级菜单hover：浅灰色 */
            .submenu li:hover, .submenu li.active {
                background-color: var(--secondary-hover) !important;
                color: var(--text-white) !important;
            }
            .product-column {
                margin-bottom: 15px;
                min-width: 100%;
                max-width: 100%;
                width: 100%;
            }
            .product-title {
                background: none;
                color: var(--text-white);
                width: 100%;
                font-size: 14px;
                text-align: left;
                max-height: none !important;
                display: block !important;
                -webkit-line-clamp: unset !important;
            }
            .product-items li {
                color: var(--text-white);
                white-space: normal;
                word-wrap: break-word;
                border-bottom: none !important; /* 移动端隐藏分隔线 */
                font-size: 14px;
                text-align: left;
                max-height: none !important;
                display: block !important;
                -webkit-line-clamp: unset !important;
                border-radius: 0 !important; /* 移动端默认无圆角 */
            }
            /* 移动端三级菜单hover：浅灰色+圆角 */
            .product-items li:hover, .product-items li.active {
                background-color: var(--secondary-hover) !important;
                color: var(--text-white) !important;
                border-radius: var(--border-radius) !important; /* 移动端hover圆角4px */
            }
            /* 移动端hover展开菜单 */
            .nav-item:hover > .submenu,
            .nav-item:hover .product-panel {
                display: block;
            }
            /* 移动端客服按钮适配 */
            .online-customer-service {
                width: 50px;
                height: 50px;
                right: 10px;
                top: 10px;
            }
            .customer-service-icon {
                font-size: 20px;
            }
            /* 移动端邮件弹窗适配 */
            .email-modal {
                right: 70px;
                width: 320px;
            }
        }
        /* 移除一级菜单下方空白 */
        .banner {
            margin-top: 0 !important;
        }
        /* 回到顶部按钮层级 */
        #backToTop {
            z-index: 9998 !important;
        }
        /* 邮件弹窗头部样式（保持原样） */
        .modal-header {
            background-color: #308edb;
            color: white;
            padding: 20px;
            text-align: center;
            position: relative;
        }
        .modal-header h2 {
            font-size: 1.8rem;
            margin-bottom: 8px;
            font-weight: bold;
        }
        .modal-header p {
            font-size: 1rem;
            line-height: 1.5;
        }
        .close-modal {
            position: absolute;
            top: 15px;
            left: 15px;
            font-size: 24px;
            cursor: pointer;
            color: white;
        }
        /* 邮件表单样式（保持原样） */
        .email-form {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }
        .form-group label {
            font-size: 14px;
            color: #666;
        }
        .form-group input,
        .form-group textarea {
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: border-color 0.3s ease;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: #308edb;
        }
        .send-email-btn {
            background-color: #308edb;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        .send-email-btn:hover {
            background-color: #00308d;
        }
        /* 电话/邮箱快捷按钮 - 悬浮显示信息（保持原样） */
        .service-shortcuts {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-top: 10px;
        }
        .shortcut-btn {
            width: 50px;
            height: 50px;
            background-color: #888;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
        }
        .shortcut-btn:hover {
            background-color: #666;
        }
        .shortcut-btn svg {
            width: 25px;
            height: 25px;
            fill: white;
        }
        /* 悬浮显示的气泡（保持原样） */
        .tooltip {
            position: absolute;
            right: 60px;
            top: 50%;
            transform: translateY(-50%);
            background: white;
            color: #333;
            padding: 6px 12px;
            border-radius: 6px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.15);
            font-size: 14px;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: all 0.2s ease;
            z-index: 9999;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        /* 气泡小三角（保持原样） */
        .tooltip::after {
            content: '';
            position: absolute;
            right: -6px;
            top: 50%;
            transform: translateY(-50%);
            border-width: 6px 0 6px 6px;
            border-style: solid;
            border-color: transparent transparent transparent white;
        }
        /* 鼠标悬浮时显示气泡（保持原样） */
        .shortcut-btn:hover .tooltip {
            opacity: 1;
            visibility: visible;
            right: 55px;
        }
        /* 悬浮提示内图标样式（保持原样） */
        .tooltip-icon {
            width: 16px;
            height: 16px;
            fill: #666;
        }
		
		
		  /* 全局重置 */
      
        /* 主体容器：响应式居中，顶部对齐 */
        .intro-container {
            max-width: 1400px;
            margin: 0 auto;
            padding:20px 0 20px 0;
            display: flex;
            align-items: flex-start; /* 顶部对齐 */
            gap:30px;
        }
        /* 图片区域：移除播放按钮，圆角4px */
        .intro-image-wrapper {
            flex: 1;
            position: relative;
            min-width: 400px;
        }
        .intro-image {
            width: 100%;
            height: auto;
            display: block;
            border-radius: 4px; /* 圆角4px */
        }
        /* 移除视频播放按钮相关样式 */
        .play-button {
            display: none;
        }
        /* 文字区域 */
        .intro-text-wrapper {
            flex: 1;
            min-width: 400px;
        }
        /* 大标题样式：统一32px */
        .intro-title {
            font-size: 32px;
            font-weight: 700;
            color: #0a3055;
            margin-bottom: 12px;
            position: relative;
        }
        /* 标题下划线 */
        .intro-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -16px;
            width: 60px;
            height: 5px;
            background-color: #3498db;
            border-radius: 3px;
        }
        /* 第一段介绍（蓝色文字）：统一16px */
        .intro-desc-highlight {
            font-size: 16px;
            line-height: 1.5;
            color: #0056b3;
            margin: 32px 0 15px 0;
            font-weight: 500;
        }
        /* 第二段介绍（灰色文字）：统一16px */
        .intro-desc-normal {
            font-size: 16px;
            line-height: 1.7;
            color: #555;
        }
        /* 响应式：平板（≤1024px） */
        @media (max-width: 1024px) {
            .intro-container {
                gap: 40px;
                padding: 30px 20px;
            }
            .intro-title {
                font-size: 28px;
            }
            .intro-desc-highlight {
                font-size: 15px;
                margin: 28px 0 30px 0;
            }
            .intro-desc-normal {
                font-size: 15px;
            }
        }
        /* 响应式：手机（≤768px） */
        @media (max-width: 768px) {
            .intro-container {
                flex-direction: column;
                gap: 30px;
                padding: 20px 15px;
            }
            .intro-image-wrapper,
            .intro-text-wrapper {
                min-width: 100%;
                width: 100%;
            }
            .intro-title {
                font-size: 24px;
            }
            .intro-title::after {
                width: 50px;
                height: 4px;
                bottom: -12px;
            }
            .intro-desc-highlight {
                font-size: 14px;
                margin: 24px 0 26px 0;
            }
            .intro-desc-normal {
                font-size: 14px;
            }
        }
        /* 响应式：小屏手机（≤480px） */
        @media (max-width: 480px) {
            .intro-title {
                font-size: 22px;
            }
            .intro-desc-highlight {
                font-size: 13px;
            }
            .intro-desc-normal {
                font-size: 13px;
            }
        }