@charset "UTF-8";
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: Arial, sans-serif;
            background-color: #000;
            color: #333;
            line-height: 1.6;
             text-decoration: none;
         
            margin: 0 auto;
        }
		a{  text-decoration: none; color:#ccc}
		a:hover{ color:#000}
		img{ max-width:100%}
		.container { max-width: 1400px; margin:0 auto}

        /* 顶部全屏Banner */
        .top-banner {
            width: 100%;
			margin-top:65px;
       
        }
        .top-banner img {
            width: 100%;
            height: auto;
            display: block;
        }
		   /* 搜索栏 */
        .search-bar {
            background-color: #333;
            padding: 10px 0;
        }
        .search-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .search-tags a {
            color: #ccc;
            font-size: 0.9rem;
            text-decoration: none;
            margin-right: 8px;
        }
        .search-tags a:hover {
            color: #fff;
        }
        .search-wrap {
            position: relative;
            width: 280px;
            max-width: 100%; 
        }
        .search-input {
            display: flex;
        }
        .search-input input {
            width: 100%;
            padding: 6px;
            border: none;
            outline: none;
        }
        /* 搜索按钮：图片样式 */
        .search-input button {
            background-color: #fff;
            border: none;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }
        .search-input button img {
            width: 32px;
            height: 32px;
            object-fit: contain;
        }
      /* 修复搜索下拉被遮挡 */
.search-suggest {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 9999; /* 最高层级，防止被遮挡 */
    display: none;
    padding: 8px 0;
    box-sizing: border-box;
}
.search-suggest a {
    display: block;
    padding: 8px 15px;
    color: #333;
    text-decoration: none;
}
.search-suggest a:hover {
    background: #f5f5f5;
}
/* 给外层容器加相对定位，作为下拉框参照物 */
.search-input {
    position: relative;
}
        /* 面包屑导航 */
        .breadcrumb {
			 grid-column: 1 / -1;
            background-color: #222;
            padding: 15px 15px;
            margin: 20px 0;
            border-radius: 4px;
            font-size: 14px;
			color:#fff;
        }
        .breadcrumb a {
            color: #ccc;
            text-decoration: none;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: #999;
            margin: 0 5px;
        }
	
		
/*-------------------------简介*/
        /* 公司简介文本 */
        .company-intro {
            margin: 30px 0;
        }
        .company-intro h1 {
            font-size: 24px;
            margin-bottom: 20px;
            color: #fff;
        }
        .company-intro p {
            margin-bottom: 15px;
            font-size: 15px;
            color: #ddd;
        }

        /* 核心数据卡片 */
        .stats-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin: 40px 0;
        }
        .stat-card {
            background-color: #222;
            padding: 25px;
            border-radius: 8px;
            text-align: center;
        }
        .stat-card .number {
            font-size: 48px;
            font-weight: bold;
            color: #fff;
            margin-bottom: 15px;
            position: relative;
        }
        .stat-card .number::after {
            content: "+";
            font-size: 24px;
            color: #ff9900;
            position: absolute;
            top: 5px;
            right: 20px;
        }
        .stat-card p {
            font-size: 14px;
            color: #ccc;
        }

        /* 通用板块头部样式 */
        .section-header {
            text-align: center;
            margin: 60px 0 30px;
        }
        .section-header h2 {
            font-size: 36px;
            color: #fff;
            font-weight: bold;
            margin-bottom: 15px;
            letter-spacing: 1px;
        }
        .section-header p {
            font-size: 14px;
            color: #ccc;
            max-width: 1200px;
            margin: 0 auto;
            line-height: 1.5;
        }

         /* 历史发展板块 - 优化版 */
        .history-section {
            margin: 40px 0;
        }
        .history-slider {
            width: 100%;
            overflow: hidden;
            position: relative;
            margin: 30px 0;
            user-select: none;
        }
        .history-wrap {
            display: flex;
            transition: transform 0.4s ease;
            width: 100%;
        }
        .history-page {
            flex: 0 0 100%;
            padding: 0 10px;
        }
        /* PC端：2行3列 核心布局 */
        .history-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            grid-template-rows: repeat(2, 1fr);
            gap: 20px;
            width: 100%;
        }
        .history-item {
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .history-item a {
            display: flex;
            flex-direction: column;
            height: 100%;
            text-decoration: none;
            color: inherit;
            gap: 10px;
        }
        .history-item-text {
            font-size: 13px;
            color: #ccc;
            line-height: 1.4;
            min-height: 48px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
		 .history-item-text strong{ font-size:18px;}
        /* 固定图片尺寸 + 不变形 */
        .history-item-img {
            width: 100%;
            height: 320px;
          
            object-position: center;
            display: block;
            border-radius: 4px;
        }
        .history-item a:hover .history-item-text {
            color: #fff;
        }
        .history-item a:hover .history-item-img {
            opacity: 0.9;
            transform: scale(1.02);
            transition: 0.3s;
        }


        /* 资质证书板块 - 修复图片显示不全 */
        .quality-section {
            margin: 60px 0;
        }
        .quality-slider {
            width: 100%;
            overflow: hidden;
            position: relative;
            margin: 20px 0;
            user-select: none;
        }
        .quality-slider-wrap {
            display: flex;
            transition: transform 0.4s ease;
            align-items: flex-start;
        }
        .quality-item {
            flex: 0 0 calc(25% - 12px);
            margin: 0 6px;
            text-decoration: none;
            color: #ccc;
            display: flex;
            flex-direction: column;
        }
        /* 修复：图片完整显示，不裁剪变形 */
        .quality-item-img {
            width: 100%;
            height: 380px;
            object-fit: contain;  /* 完整展示图片，保留原图比例 */
            object-position: center;
            background: #111;
            display: block;
            flex-shrink: 0;
        }
        .quality-item-text {
            font-size: 12px;
            color: #ccc;
            padding: 8px 0;
            line-height: 1.4;
            text-align: center;
            min-height: 40px;
        }
        .quality-item:hover .quality-item-text {
            color: #fff;
        }
        .quality-item:hover .quality-item-img {
            opacity: 0.9;
        }

        /* 小圆点导航 */
        .dots {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin: 20px 0 40px;
        }
        .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #444;
            cursor: pointer;
            transition: background 0.3s ease;
        }
        .dot.active {
            background: #fff;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .history-grid {
                grid-template-columns: repeat(2, 1fr);
                grid-template-rows: auto auto;
                gap: 15px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .quality-item {
                flex: 0 0 calc(50% - 10px);
                margin: 0 5px;
            }
            .quality-item-img {
                height: 300px;
            }
            .history-item-img {
                height: 160px;
            }
        }

        @media (max-width: 480px) {
            .stats-cards {
                grid-template-columns: 1fr;
            }
            .quality-item-img {
                height: 260px;
            }
            .history-item-img {
                height: 140px;
            }
        }
		
		
		        /* 底部容器样式 */
        .footer-container {
            background-color: #000;
            color: #fff;
            padding: 40px 0;
            width: 100%;
        }

        /* 导航列容器 - 核心自适应布局 */
        .footer-nav {
            display: flex;
            justify-content: flex-start;
            align-items: flex-start;
            gap: 60px; /* 列之间的间距 */
            flex-wrap: wrap; /* 自动换行 */
        }

        /* 每一列的样式 */
        .footer-column {
            flex: 1; /* 均分宽度 */
            min-width: 200px; /* 小屏幕最小宽度，保证可读性 */
        }

        /* 列标题样式 */
        .column-title {
            font-size: 16px;
            font-weight: bold;
            position: relative;
            padding-bottom: 10px;
            margin-bottom: 15px;
            color: #fff;
        }

        /* 标题下方的橙色小横线 */
        .column-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background-color: #f9a825; /* 橙色 */
        }

        /* 导航链接样式 */
        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: #ccc; /* 浅白色，贴近原图效果 */
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: #fff; /* hover 时变纯白 */
        }

        /* 社交媒体图标容器 */
        .social-icons {
            margin-top: 40px;
            display: flex;
            gap: 20px;
            justify-content: center;
        }

        .social-icons a {
            color: #fff;
            font-size: 20px;
            text-decoration: none;
        }

        /* 响应式适配：小屏幕（手机） */
        @media (max-width: 768px) {
            .footer-container {
                padding: 30px 20px;
            }
            .footer-nav {
                gap: 30px;
            }
        }
		
		
		/*-----------------------------------------新闻列表*/
		 .news-container {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        /* 新闻板块 - 统一背景 + 链接块 */
        .news-item {
            display: flex;
            background-color: #1a1a1a;
            overflow: hidden;
            flex-wrap: wrap;
            transition: all 0.3s ease; /* 动画过渡 */
            cursor: pointer;
            position: relative;
        }

        /* 鼠标悬浮动态效果 */
        .news-item:hover {
            transform: translateY(-6px); /* 上浮 */
            box-shadow: 0 8px 20px rgba(0,0,0,0.4); /* 阴影 */
        }

        /* 图片区域 */
        .news-img {
            flex: 0 0 320px;
            width: 320px;
        }

        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* 内容区域 */
        .news-content {
            flex: 1;
            padding: 25px 30px;
            position: relative;
            padding-bottom: 70px;
        }

        .news-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            color: #fff;
            line-height: 1.4;
        }

        .news-desc {
            font-size: 14px;
            color: #ccc;
            line-height: 1.5;
            margin-bottom: 20px;
        }

        .news-more {
            color: #ccc;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
        }

        .news-more::before {
            content: "♦";
            margin-right: 5px;
            font-size: 10px;
        }

        /* 日期：完全紧贴 右下角 */
        .news-date {
            position: absolute;
            right: 0;    /* 右侧贴边 */
            bottom: 0;   /* 底部贴边 */
            background-color: #333;
            width: 60px;
            text-align: center;
            padding: 8px 0;
        }

        .date-day {
            font-size: 24px;
            font-weight: bold;
            line-height: 1;
            color: #fff;
        }

        .date-month {
            font-size: 12px;
            color: #ccc;
        }

        /* 移动端自适应 */
        @media (max-width: 768px) {
            .news-item {
                flex-direction: column;
            }
            .news-img {
                flex: 0 0 auto;
                width: 100%;
            }
            .news-content {
                padding: 20px;
                padding-bottom: 70px;
            }
            .news-date {
                width: 55px;
            }
            .date-day {
                font-size: 20px;
            }
        }
		
		  /* ------------------------------------------ 新闻详情*/
       /* 外层容器：控制整体居中、间距，不再统一背景 */
        .news-wrap {
           
            display: grid;
            /* 3:1比例 + 右侧最小宽度280px，禁止侧边栏被压缩 */
            grid-template-columns: 3fr minmax(280px, 1fr);
            gap: 20px;
            /* 锁定网格轨道尺寸，防止内容撑开/收缩 */
            grid-auto-columns: 0;
        }

        /* 面包屑导航 单独通栏 */
      
     
        /* 主内容区：独立白色背景 */
        .main-content {
            background: #fff;
            padding: 30px;
            /* 主区域禁止收缩 */
            min-width: 0;
        }

        .article-header {
            margin-bottom: 20px;
            border-bottom: 1px solid #eee;
            padding-bottom: 15px;
        }

        .article-title {
            font-size: 22px;
            margin-bottom: 10px;
            color: #222;
        }

        .article-meta {
            font-size: 12px;
            color: #666;
        }

        .article-content {
            margin-bottom: 30px;
        }

        .article-content p {
            margin-bottom: 15px;
           
            font-size: 15px;
        }

        /* 视频容器 */
        .video-container {
            width: 100%;
            aspect-ratio: 16/9;
            background-color: #333;
            margin-bottom: 20px;
        }

        /* 分页导航 —— 完美紧贴白色盒子左右边缘 */
        .pagination-content {
            display: flex;
            justify-content: space-between;
            margin: 20px -30px -30px;
        }

        .pagination-btn {
            background-color: #222;
            color: #fff;
            padding: 12px 25px;
            border: none;
            cursor: pointer;
            font-size: 14px;
            transition: background 0.2s;
        }

        .pagination-btn:hover {
            background-color: #444;
        }

        /* 侧边栏：美化样式 + 卡片效果 */
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 15px;
            /* 关键：侧边栏不参与自动收缩 */
            min-width: 280px;
            width: 100%;
        }

        /* 右侧每个模块卡片 */
        .news-sidebar-widget {
            background: #fff;
            padding: 20px;
            /* 内部内容超出自动换行，不向外撑开容器 */
            overflow: hidden;
        }

        .widget-title {
            font-size: 16px;
            margin-bottom: 12px;
            border-bottom: 2px solid #eee;
            padding-bottom: 8px;
            color: #222;
            font-weight: bold;
        }

        /* 列表样式 + 左侧小图标 */
        .widget-list {
            list-style: none;
        }

        .widget-list li {
            margin-bottom: 9px;
            font-size: 14px;
            padding-left: 16px;
            position: relative;
            /* 超长文字自动换行，不会撑开侧边栏宽度 */
            word-wrap: break-word;
            overflow-wrap: break-word;
        }

        /* 左侧小圆点图标 */
        .widget-list li::before {
            content: "•";
            position: absolute;
            left: 0;
            top: 0;
            color: #444;
            font-weight: bold;
        }

        .widget-list a {
            color: #333;
            text-decoration: none;
            /* 链接文字不横向溢出 */
            display: inline-block;
            max-width: calc(100% - 16px);
        }

        .widget-list a:hover {
            color: #000;
        }

        /* 移动端自适应 */
        @media (max-width: 768px) {
            .news-wrap {
                grid-template-columns: 1fr;
            }
            .main-content {
                padding: 20px 15px;
                min-width: auto;
            }
            .news-sidebar {
                min-width: auto;
            }
            .pagination-content {
                margin: 20px -15px -15px;
            }
            .article-title {
                font-size: 18px;
            }
        }
		
		/*--------------------------------产品封面*/
		  .products-container {
           
            display: flex;
            flex-direction: column;
            gap: 20px; /* 每个卡片之间的间距 */
			margin:20px 0;
        }
		
		 /* 卡片：核心排版单元 */
        .valve-card {
            display: flex;
            flex-wrap: wrap; /* 自适应换行 */
            background-color: #1a1a1a;
            border-radius: 8px;
            overflow: hidden;
        }

        /* 图片区域：占比、背景、居中 */
        .valve-image {
            flex: 1 1 400px; /* 最小宽度400px，自适应拉伸 */
            background-color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .valve-image img {
            max-width: 100%;
            max-height: 400px;
            object-fit: contain;
        }

        /* 文本区域：占比、样式、内边距 */
        .valve-text {
            flex: 1 1 400px; /* 最小宽度400px，自适应拉伸 */
            color: #fff;
            padding: 40px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        /* 标题样式 */
        .valve-title {
            font-size: 28px;
            font-weight: bold;
            text-transform: uppercase;
            color: #fff;
        }

        /* 正文样式 */
        .valve-description {
            font-size: 16px;
            line-height: 1.6;
            color: #e0e0e0;
        }

        /* 响应式适配：手机端优化 */
        @media (max-width: 800px) {
            .valve-text {
                padding: 20px;
            }
            .valve-title {
                font-size: 24px;
            }
            .valve-description {
                font-size: 14px;
            }
        }
		
		
		/*------------------------------------------------------------产品详情*/
		      
        
        /* 容器：电脑端左右布局，不换行 */
        .prod-page-wrap {
            display: flex;
            flex-wrap: nowrap;
            max-width: 1400px;
           
            gap: 20px;
            align-items: flex-start;
			margin-top:20px;
        }

         /* 左侧侧边栏 */
        .prod-sidebar {
            width: 280px;
            flex: none;
            background: #fff;
            border-radius: 4px;
            overflow: hidden;
            position: sticky;
            top: 20px;
        }
        .prod-sidebar-title {
            background: #222;
            color: #fff;
            padding: 12px 15px;
            font-size: 16px;
        }

        /* 一级菜单 */
        .prod-nav-l1 > li > a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 15px;
            border-bottom: 1px solid #eee;
            font-size: 15px;
            transition: 0.2s;
			color:#333;
        }
        .prod-nav-l1 > li > a:hover {
            background: #000;
            color: #fff;
        }
        .prod-nav-l1 > li > a.active {
            background: #333;
            color: #fff;
        }
        /* 默认收缩状态箭头向右 */
        .prod-nav-l1 > li > a::after {
            content: "▶";
            font-size: 10px;
            transition: transform 0.3s ease;
            transform: rotate(0deg);
        }
        /* 展开active箭头向下 */
        .prod-nav-l1 > li > a.active::after {
            transform: rotate(90deg);
        }
        /* 无子菜单隐藏箭头 */
        .prod-nav-l1 > li:not(.has-sub) > a::after {
            content: "";
        }

        /* 二级菜单平滑过渡 */
        .prod-nav-l2 {
            background: #f8f8f8;
            overflow: hidden;
            max-height: 0;
            opacity: 0;
            transition: all 0.3s ease;
        }
        .prod-nav-l2.show {
            max-height: 800px;
            opacity: 1;
        }

        .prod-nav-l2 li a {
            display: block;
            padding: 10px 15px 10px 30px;
            border-bottom: 1px solid #eee;
            font-size: 14px;
            position: relative;
			color:#333;
        }
        .prod-nav-l2 li a:hover::after {
            content: "";
            position: absolute;
            left: 30px;
            right: 15px;
            bottom: 0;
            height: 1px;
            background: #000;
			 color: #000;
        }
        .prod-nav-l2 li a.active {
            color: #000;
            font-weight: bold;
			
        }

        /* 右侧主内容 */
        .prod-main {
            flex: 1;
            background: #fff;
            padding: 20px;
            border-radius: 4px;
        }

        .prod-breadcrumb {
            font-size: 14px;
            color: #666;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .prod-breadcrumb a {
            color: #666;
        }

        .prod-pic {
            text-align: center;
            margin-bottom: 20px;
        }
        .prod-pic img {
            max-width: 100%;
            height: auto;
        }
        .prod-name {
            text-align: center;
            font-size: 18px;
            margin-bottom: 25px;
            color: #333;
        }

        /* 灰色通栏 + 黑色标题 无缝衔接 */
        .prod-block-head {
            width: 100%;
            background: #999;
            margin: 20px 0 10px;
            padding: 0;
        }
        .prod-block-title {
            background: #000;
            color: #fff;
            padding: 10px 14px;
            font-size: 16px;
            display: inline-block;
            border-radius: 0;
            margin-left: 10px;
        }
        .prod-subtitle {
            font-size: 15px;
            margin: 12px 0;
            color: #333;
        }

        .prod-drawing {
            text-align: center;
            margin: 15px 0;
        }
        .prod-drawing img {
            max-width: 100%;
            height: auto;
        }

        .prod-note {
            font-size: 12px;
            color: #666;
            margin: 10px 0 20px;
            line-height: 1.5;
        }

        /* 表格外层容器 */
        .table-container {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            margin-bottom: 30px;
        }
        /* 表格整体外框黑色 */
        .table-container table {
            width: 100%;
            min-width: 800px;
            border-collapse: collapse;
            border: 1px solid #000;
        }
        /* 默认所有单元格边框黑色 */
        .table-container table td {
            border: 1px solid #000;
            padding: 10px;
            text-align: center;
            font-size: 14px;
        }
        .table-container table tr:nth-child(even) {
            background:#f5f5f5;
        }
        /* 仅前两行内部分隔线变白，外层表格边框仍黑色 */
        .table-container table > tbody > tr:nth-child(1) > td,
        .table-container table > tbody > tr:nth-child(2) > td {
            border-color: #fff;
        }

        /* 手机端：768px以下上下堆叠 */
        @media (max-width: 767.98px) {
            .prod-page-wrap {
                flex-direction: column;
            }
            .prod-sidebar {
                width: 100%;
                position: static;
            }
            .prod-main {
                width: 100%;
            }
        }
		
		
		/*---------------------------------------------------软管阀简介*/
		 /* 产品标题 */
        .product-title-wrap {
            text-align: center;
            padding:40px 0 20px 0;
        }
        .product-title {
            font-size: 2rem;
            font-weight: bold;
            display: inline-block;
            margin-bottom: 8px;
			color:#fff
        }
        .title-decor {
            width: 180px;
            height: 12px;
            margin: 0 auto;
         
            background-size: contain;
            background-repeat: no-repeat;
            background-position: center;
        }

        /* 白色内容块 */
        .content-block {
            background-color: #fff;
            color: #000;
            padding: 20px;
            margin-bottom: 20px;
            border-radius: 5px;
        }
        /* 小标题：左蓝实线 + 右灰实线 */
        .content-block h3 {
            color: #000;
            padding-bottom: 8px;
            margin-bottom: 15px;
            position: relative;
        }
        .content-block h3::before {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: #000;
        }
        .content-block h3::after {
            content: "";
            position: absolute;
            left: 50px;
            bottom: 0;
            width: calc(100% - 50px);
            height: 2px;
            background-color: #cccccc;
        }

        /* 内容图片 */
        .block-img {
            width: 100%;
        }
        .block-img img {
            max-width: 100%;
            height: auto;
            display: block;
        }

 

        /* 响应式 */
        @media (max-width: 768px) {
            .banner-content { flex-direction: column; }
            .product-title { font-size: 1.5rem; }
           
        }
       
	   /*---------------------------------------------------软管阀阀芯*/
	     /* 头部样式 */
        .header {
            text-align: center;
            margin-bottom: 40px; margin-top:40px;
        }

        .header h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            color: #fff;
        }

        .header p {
            font-size: 1rem;
            color: #ccc;
            max-width: 1400px;
            margin: 0 auto;
        }

        /* 通用内容卡片 */
        .content-card {
            background-color: #fff;
            color: #333;
            padding: 30px;
            border-radius: 8px;
            margin-bottom: 40px;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }

        .content-card h2 {
            color: #0056b3;
            border-bottom: 2px solid #0056b3;
            padding-bottom: 10px;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }

        .content-card p {
            margin-bottom: 15px;
            font-size: 1rem;
        }

        /* 结构模块 */
        .structure {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .structure-img-container {
            width: 100%;
            text-align: center;
        }

        .structure-img {
            max-width: 100%;
            height: auto;
            border: 1px solid #eee;
            border-radius: 4px;
        }

        /* 材料区域 整体 */
        .materials-section {
            max-width: 1400px;
            margin: 0 auto 40px;
        }

        .materials-section h2 {
            text-align: center;
            font-size: 2rem;
            margin-bottom: 30px;
            color: #fff;
        }

        .materials-section .intro {
            color: #ccc;
            text-align: center;
            margin-bottom: 30px;
            font-size: 1rem;
        }

        /* 电脑端一行2个 */
        .materials-wrap {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        /* 单个材料卡片 */
        .material-item {
            display: flex;
            background: #fff;
            color: #333;
            border-radius: 8px;
            overflow: hidden;
            align-items: stretch;
        }

        /* 电脑端：图片固定宽度 + 紧贴边缘 + 等比缩放 */
        .material-pic {
            width: 220px; /* 固定宽度，可自行修改数值 */
            flex-shrink: 0;
            display: flex;
            align-items: stretch;
            overflow: hidden;
        }

        .material-pic img {
            width: 100%;
            height: 100%;
            object-fit: contain; /* 完整显示图片，等比不变形、不裁切 */
            display: block;
            transition: all 0.4s ease;
        }

        /* 图片hover动效 */
        .material-pic:hover img {
            transform: scale(1.08);
            filter: brightness(0.9);
        }

        /* 右侧文字区域 */
        .material-text {
            flex: 1;
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .material-text h3 {
            color: #000;
            margin-bottom: 12px;
            font-size: 1.2rem;
        }

        .material-text ul {
            list-style: disc;
            padding-left: 20px;
        }

        .material-text li {
            margin-bottom: 8px;
            font-size: 0.9rem;
        }

        /* 产品实拍 */
        .product-photos {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .product-photo {
            width: 100%;
            height: 300px;
            object-fit: cover;
            border-radius: 8px;
            border: 1px solid #333;
        }

        /* 平板：一行1个 */
        @media (max-width: 992px) {
            .materials-wrap {
                grid-template-columns: 1fr;
            }
        }

        /* 手机端：改为上下布局，图片自适应全屏 */
        @media (max-width: 768px) {
            .header h1 {
                font-size: 2rem;
            }
            .content-card h2 {
                font-size: 1.5rem;
            }
            .materials-section h2 {
                font-size: 1.8rem;
            }
            .material-item {
                flex-direction: column;
            }
            .material-pic {
                width: 100%; /* 手机端取消固定宽度，铺满 */
            }
            .material-pic img {
                height: auto;
            }
            .product-photo {
                height: 250px;
            }
        }

        @media (max-width: 480px) {
            body {
                padding: 10px;
            }
            .content-card {
                padding: 20px;
            }
            .product-photo {
                height: 200px;
            }
        }
		
		/*------------------------------------------------------------------联系*/
		.contact-wrap {


display: flex;
gap: 64px;
flex-wrap: wrap;
align-items: flex-start; /* 顶部对齐核心 */
margin-top:40px; margin-bottom:40px;
}
.contact-form-block,
.contact-info-block {
flex: 1;
min-width: 320px;
padding-top: 0; /* 清除内边距差异 */
}


/* 左侧主标题 */
.contact-main-title {
font-size: 36px;
margin: 0 0 24px 0; /* 仅底部外边距，顶部margin=0 */
line-height: 1.25;
font-weight: 600;color:#fff
}
/* 右侧分区小标题 统一顶部margin规则 */
.contact-sub-title {
font-size: 32px;
margin: 0 0 16px 0; /* 顶部margin归零，仅底部留白 */
font-weight: 600;
color:#fff
}


/* 表单说明文字 */
.contact-form-desc {
font-size: 20px;
margin-bottom: 40px;
line-height: 1.5;
opacity: 0.95;color:#999
}

/* 输入框容器 */
.contact-input-item {
margin-bottom: 28px;
}
/* 自定义输入框 不使用原生input选择器 --> .contact-input */
.contact-input {
width: 100%;
background: transparent;
border: none;
border-bottom: 1px solid #ffffff;
padding: 12px 0;
color: #fff;
font-size: 20px;
outline: none;
}
.contact-input::placeholder {
color: #cccccc;
}

/* 提交按钮 不使用原生button选择器 --> .contact-submit-btn */
.contact-submit-btn {
background-color: #333;
color: #fff;
border: none;
padding: 14px 32px;
font-size: 18px;
cursor: pointer;
transition: background 0.25s ease;
}
.contact-submit-btn:hover {
background-color: #292828;
}

/* 联系文字行 */
.contact-text-row {
font-size: 20px;
margin-bottom: 12px;
line-height: 1.45;color:#999
}
.contact-text-row a {
color: #fff;
text-decoration: none;
}
.contact-text-row a:hover {
text-decoration: underline;
}

/* 分割线 */
.contact-divider-line {
width: 100%;
height: 1px;
background: #404040;
margin: 16px 0;
}

/* 移动端自适应 */
@media (max-width: 768px) {

.contact-wrap {
gap: 32px;
}
.contact-main-title {
font-size: 28px;
}
.contact-sub-title {
font-size: 20px;
}
.contact-form-desc,
.contact-input,
.contact-text-row {
font-size: 16px;
}
}

/*-------------------------------------------------历程详情*/
               /* 主容器 重命名 wrap-main */
        .wrap-main {
            display: flex;
            flex-wrap: wrap;
           
       
            gap: 24px;
            /* 取消等高对齐 */
            align-items: flex-start;
        }

        /* 左侧内容区 wrap-left 白色背景容器 */
        .wrap-left {
            flex: 1;
            min-width: 320px;
            background: #ffffff;
            color: #000;
            padding: 30px 24px;
            border-radius: 2px;
        }
        .txt-year-head {
            font-size: 30px;
            color: #000;
            font-weight: bold;
            padding-bottom: 16px;
            margin-bottom: 20px;
            border-bottom: 1px solid #ddd;
        }
        .txt-russian-desc {
            font-size: 16px;
            color: #333;
            margin-bottom: 20px;
            line-height: 1.8;
        }

        /* 轮播容器 固定高度 */
        .box-slide {
            width: 100%;
          
            overflow: hidden;
            border-radius: 2px;
            position: relative;
            user-select: none;
        }
        .slide-track {
            display: flex;
            height: 100%;
            transition: transform 0.6s ease;
            cursor: grab;
        }
        .slide-track:active {
            cursor: grabbing;
        }
        .slide-img {
            flex: 0 0 100%; /* 每张图占容器100%宽度，不再写死300% */
            height: 100%;
            pointer-events: none;
            object-fit: fill; /* 拉伸填满允许变形 */
        }

        /* 轮播指示点 */
        .slide-dots {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 12px;
            margin-bottom: 22px;
        }
        .dot-item {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #666;
            cursor: pointer;
            transition: background 0.3s;
        }
        .dot-item.active {
            background: #e63946;
        }

        /* 翻页链接区域 */
        .wrap-page-turn {
            display: flex;
            justify-content: space-between;
            margin-top: 0;
            padding: 0;
        }
        .btn-turn-page {
            display: inline-block;
            padding: 9px 18px;
            background: #222;
            color: #fff;
            text-decoration: none;
            border-radius: 24px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-turn-page:hover {
            background: #444;
        }

        /* 右侧侧边栏 sticky跟随滚动 */
        .wrap-aside {
            flex: 0 0 270px;
            position: sticky;
            top: 24px;
            height: auto;
        }
        .box-aside-nav {
            background: #ffffff;
            color: #000;
            padding: 15px 20px;
        }
        .txt-aside-title {
            font-size: 36px;
            text-align: center;
            font-weight: bold;
            margin-bottom: 15px;
            letter-spacing: 1px;
        }

        .wrap-menu-l1 {
            margin-bottom: 6px;
        }
        .item-menu-l1 {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            background: #f0f0f0;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .item-menu-l1:hover {
            background: #e0e0e0;
        }
        .item-menu-l1.active {
            background: #000;
            color: #fff;
        }

        /* 日期日历图标 */
        .icon-cal-date {
            color: #000;
            font-size: 18px;
            width: 18px;
            text-align: center;
            transition: color 0.2s ease;
        }
        .item-menu-l1.active .icon-cal-date {
            color: #ffffff !important;
        }

        /* 二级菜单 */
        .box-submenu {

            display: none;
            padding: 8px 0;
        }
        .box-submenu.open {
            display: block;
        }
        .item-menu-l2 {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            text-decoration: none;
            color: #000;
            border-bottom: 1px dashed #ddd;
            transition: all 0.2s ease;
        }
        .wrap-l2-arrow {
            width: 18px;
            text-align: center;
            font-size: 16px;
        }
        .item-menu-l2:hover {
            background: #f5f5f5;
        }
        .item-menu-l2.active {
            background: #e9e9e9;
            border-bottom: 1px solid #000;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .wrap-main {
                flex-direction: column;
                align-items: flex-start;
            }
            .wrap-aside {
                position: static;
                width: 100%;
                margin-top: 30px;
            }
            .box-slide {
                height: 320px;
            }
        }