    <title>杭州包钢稀土科技发展有限责任公司</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        body {
            display: flex;
            flex-direction: column;  /* 改为垂直布局 */
            min-height: 100vh;       /* 保持最小视口高度 */
            background-color: rgb(241, 241, 248);
        }
        /* 新增内容容器 */
        main {
            flex: 1;                /* 占据剩余空间 */
            width: 100%;
            /* 顶部留白过大导致卡片偏下：收紧但仍避开固定导航 */
            padding: 26px 20px 40px;
            margin-top: 60px;        /* 适配固定导航栏 */
        }

        /* 导航容器 */
        .nav-container {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }
        
        /* 导航主体 */
        .nav-wrapper {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 主导航栏 */
        .main-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 60px;
        }
        
        .logo {
            font-size: 24px;
            font-weight: 600;
            color: #000;
            text-decoration: none;
        }
        
        /* 导航菜单 */
        .nav-menu {
            display: flex;
            list-style: none;
            height: 100%;
        }
        
        .nav-item {
            position: relative;
            padding: 0 20px;
            height: 100%;
            display: flex;
            align-items: center;
        }
        
        .nav-link {
            text-decoration: none;
            color: #666;
            font-size: 14px;
            transition: color 0.3s;
            position: relative;
        }
        
        .nav-link:hover {
            color: #000;
        }
        
        /* 横向下拉菜单 */
        .dropdown-horizontal {
            position: absolute;
            top: 100%;
            left: 0;
            width: 200vw;
            margin-left: -100vw;
            left: 50%;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(30px);
            display: none;
            padding: 40px 0;
            box-shadow: 0 20px 30px rgba(0,0,0,0.1);
            border-top: 1px solid rgba(0,0,0,0.1);
        }
        
        .dropdown-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            padding: 0 20px;
        }
        
        .menu-section h3 {
            font-size: 12px;
            color: #666;
            margin-bottom: 15px;
            font-weight: 500;
            text-transform: uppercase;
        }
        
        .menu-section ul {
            list-style: none;
        }
        
        .menu-section li {
            margin-bottom: 12px;
        }
        
        .menu-section a {
            color: #000;
            text-decoration: none;
            font-size: 16px;
            transition: opacity 0.3s;
        }
        
        .menu-section a:hover {
            opacity: 0.7;
        }
        
        /* 交互效果 */
        .nav-item:hover .dropdown-horizontal {
            display: block;
            animation: menuSlide 0.3s cubic-bezier(0.23, 1, 0.32, 1);
        }
        
        @keyframes menuSlide {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .shell {
            /* 新的卡片布局：桌面三列栅格 */
            max-width: 1120px;
            margin: 0 auto;
            padding: 12px 0 0;
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 26px;
        }

        .shell .box {
            position: relative;
            overflow: hidden;
            border-radius: 24px;
            border: 1px solid rgba(210, 210, 215, 0.9);
            background: rgba(255, 255, 255, 0.72);
            box-shadow: 0 18px 55px rgba(0, 0, 0, 0.06);
            backdrop-filter: blur(14px) saturate(1.12);
            -webkit-backdrop-filter: blur(14px) saturate(1.12);
            transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease, background 220ms ease;
        }

        /* 去掉原来的 3D 翻转效果 */
        .shell:hover .box {
            transform: none;
        }

        .shell .box a {
            display: block;
            width: 100%;
            height: 100%;
            text-decoration: none;
            color: inherit;
        }

        .shell .box:hover {
            transform: translateY(-6px);
            box-shadow: 0 30px 90px rgba(0, 0, 0, 0.12);
            border-color: rgba(0, 113, 227, 0.25);
            background: rgba(255, 255, 255, 0.82);
            z-index: 2;
        }

        .shell .box .images {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 12px 12px 0;
            background: linear-gradient(
                180deg,
                rgba(0, 113, 227, 0.08) 0%,
                rgba(245, 245, 247, 0.55) 100%
            );
        }

        /* 统一照片尺寸并铺满容器，去掉留白 */
        .shell .box .images img {
            display: block;
            width: 100%;
            aspect-ratio: 2 / 3;
            height: auto;
            object-fit: contain;
            object-position: center center;
            border-radius: 18px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.10);
            background: #fff;
        }

        .shell .box .content {
            padding: 14px 18px 18px;
            text-align: center;
        }

        .shell .box .content h2 {
            color: var(--text0, #111);
            font-size: 20px;
            font-weight: 850;
            letter-spacing: -0.02em;
        }

        .shell .box .content p {
            margin-top: 6px;
            color: var(--text2, rgba(17, 24, 39, 0.65));
            font-size: 13px;
            letter-spacing: 0.02em;
        }

        /* 保留原选择器：禁用 hover 动画相关 transform（新布局不需要） */
        .shell .box:hover .content h2,
        .shell .box:hover .content p {
            transform: none;
        }
        
        /* 修改页脚样式 */
        footer {
            background: #1d1d1f;
            color: #f5f5f7;
            padding: 40px 20px;
            text-align: center;
            width: 100%;
            margin-top: 200px;        /* 自动填充底部空间 */
        }

        /* 移动端样式 */
        @media (min-width: 769px) {
            /* PC端时隐藏移动端导航 */
            .mobile-header,
            .mobile-menu {
                display: none !important;
            }
            
            /* PC端时显示主导航 */
            .nav-container {
                display: block;
            }
        }

        @media (max-width: 768px) {
            /* 移动端时隐藏PC导航 */
            .nav-container {
                display: none !important;
            }
            
            /* 移动端时显示移动导航 */
            .mobile-header {
                display: flex !important;
            }

            .shell {
                grid-template-columns: 1fr;
                padding: 0 10px;
                gap: 18px;
            }

            .shell .box {
                width: 100%;
                transform: none;
                margin: 0;
                border-radius: 20px;
            }

            .shell .box:hover {
                transform: translateY(-4px);
                box-shadow: 0 26px 80px rgba(0, 0, 0, 0.10);
                z-index: 2;
            }

            .shell .box .images {
                padding: 12px 12px 0;
            }

            .shell .box .images img {
                border-radius: 16px;
            }

            .shell .box .content {
                position: static;
                padding: 14px 16px 18px;
            }

            .shell .box .content h2 {
                font-size: 18px;
            }

            .shell .box .content p {
                font-size: 12.5px;
            }

            footer {
                width: 100vw; /* 跟导航栏宽度一致 */
                margin-left: auto;
                margin-right: auto;
                box-sizing: border-box;
            }
        }
        @media (max-width: 600px) {
            .nav-container {
                display: none; /* 隐藏桌面导航 */
            }

            .mobile-header {
                display: flex;
                justify-content: space-between;
                align-items: center;
                padding: 10px 20px;
                background: rgba(255, 255, 255, 0.9);
                border-bottom: 1px solid rgba(0, 0, 0, 0.1);
                position: relative;
                z-index: 1001;
            }

            .mobile-logo {
                font-size: 18px;
                font-weight: 600;
                color: #000;
                text-decoration: none;
            }

            .mobile-logo-en {
                font-size: 8px !important;
                color: #444;
                margin-top: 2px;
                letter-spacing: 1px;
                font-weight: 400;
                white-space: nowrap;
                line-height: 1;
                text-overflow: ellipsis;
                overflow: hidden;
                max-width: 100vw;
            }

            @media (max-width: 768px) {
            .main-nav, .nav-menu, .nav-login {
                display: none !important;
            }
            .mobile-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                height: 60px;
                padding: 0 16px;
                background: rgba(255,255,255,0.95);
                position: fixed;
                top: 0;
                left: 0;
                width: 93vw;
                z-index: 1200;
                border-bottom: 1px solid #eee;
            }
            .mobile-logo {
                font-size: 16px;
                font-weight: 600;
                color: #222;
                text-decoration: none;
                flex: 1;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            .mobile-menu-btn {
                background: none;
                border: none;
                font-size: 28px;
                color: #222;
                cursor: pointer;
                padding: 8px;
            }
            .mobile-menu {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 100vw;
                height: 100vh;
                background: #222;
                color: #fff;
                z-index: 2000;
                flex-direction: column;
                padding-top: 60px;
                transition: transform 0.3s cubic-bezier(.4,0,.2,1);
                overflow-y: auto; /* 允许菜单内容滚动 */
                -webkit-overflow-scrolling: touch; /* iOS 惯性滚动 */
            }
            .mobile-menu.active {
                display: flex;
            }
            body.mobile-menu-open {
                overflow: hidden;
                position: fixed;
                width: 100vw;
            }
            .mobile-menu-close {
                position: absolute;
                top: 16px;
                right: 20px;
                background: none;
                border: none;
                color: #fff;
                font-size: 28px;
                cursor: pointer;
                z-index: 2100;
            }
            .mobile-menu-list {
                list-style: none;
                padding: 0;
                margin: 0;
                width: 100%;
            }
            .mobile-menu-list li {
                border-bottom: 1px solid rgba(255,255,255,0.08);
            }
            .mobile-menu-link {
                display: block;
                color: #fff;
                text-decoration: none;
                font-size: 18px;
                padding: 18px 28px;
                width: 100%;
                transition: background 0.2s;
            }
            .mobile-menu-link:hover {
                background: rgba(255,255,255,0.08);
            }
            .mobile-menu-dropdown {
                background: #222;
                padding-left: 32px;
            }
            .mobile-menu-dropdown a {
                color: #fff;
                font-size: 16px;
                display: block;
                padding: 12px 0;
                text-decoration: none;
            }
            .mobile-menu-dropdown a:hover {
                text-decoration: underline;
            }
            body.mobile-menu-open {
                overflow: hidden;
            }
            .carousel-container {
                margin-top: 60px !important;
            }
            .carousel-caption {
                position: absolute;
                left: 0;
                right: 0;
                bottom: 0;
                width: 100%;
                max-width: 100%;
                padding: 0.7rem 0.7rem 0.9rem 0.7rem;
                background: rgba(0,0,0,0.32);
                text-align: left;
                color: #fff;
                animation: fadeIn 1.5s ease-in-out;
            }
            .carousel-caption h2 {
                font-size: 1.15rem;
                margin-bottom: 0.5rem;
                font-weight: 700;
                color: #fff;
                text-shadow: 0 2px 6px rgba(0,0,0,0.25);
                line-height: 1.3;
            }
            .carousel-caption p {
                font-size: 0.92rem;
                margin-bottom: 0.7rem;
                line-height: 1.5;
                color: #fff;
                text-shadow: 0 1px 3px rgba(0,0,0,0.18);
            }
            .read-more {
                padding: 7px 14px;
                font-size: 0.92rem;
            }
        }
