    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: #eef2f8;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            color: #1a2c3e;
            line-height: 1.5;
            /*padding: 2.5rem 1.5rem;*/
        }

        /* 主容器 - 宽松大气 */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 2rem;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            padding: 2.5rem 2.2rem;
        }

        /* 头部区域 */
        .site-header {
            text-align: center;
            margin-bottom: 2.8rem;
            border-bottom: 2px solid #ecf3f9;
            padding-bottom: 1.8rem;
        }

        .site-header h1 {
            font-size: 2.5rem;
            font-weight: 650;
            letter-spacing: -0.3px;
            background: linear-gradient(120deg, #1e5a6e, #2c8f6c);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 0.6rem;
        }

        .site-header .sub {
            color: #5f7f9a;
            font-size: 1rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 主要栏目卡片区（首页、关于、新闻、联系）- 已去除促销 */
        .main-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
            margin-bottom: 3rem;
        }

        .nav-card {
            background: #f9fbfe;
            border-radius: 1.5rem;
            padding: 1rem 2rem;
            min-width: 140px;
            text-align: center;
            transition: all 0.25s ease;
            border: 1px solid #e2edf6;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
        }

        .nav-card:hover {
            transform: translateY(-4px);
            border-color: #cadeef;
            background: white;
            box-shadow: 0 15px 25px -12px rgba(0, 0, 0, 0.1);
        }

        .nav-card a {
            text-decoration: none;
            display: block;
            color: inherit;
        }

        .nav-icon {
            font-size: 1.8rem;
            display: block;
            margin-bottom: 0.5rem;
        }

        .nav-card h3 {
            font-weight: 600;
            font-size: 1.2rem;
            color: #266d8c;
            margin-bottom: 0.2rem;
        }

        .nav-card p {
            font-size: 0.8rem;
            color: #6f8dab;
        }

        /* 章节标题 */
        .section-title {
            font-size: 1.8rem;
            font-weight: 650;
            color: #1e4d6b;
            margin: 2.2rem 0 1.5rem 0;
            padding-left: 0.8rem;
            border-left: 5px solid #3ba07c;
            letter-spacing: -0.2px;
        }

        /* 产品中心网格 (宽松卡片) */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 2rem;
            margin-bottom: 1rem;
        }

        .product-card {
            background: #ffffff;
            border-radius: 1.5rem;
            border: 1px solid #e8f0f6;
            transition: all 0.25s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
            overflow: hidden;
        }

        .product-card:hover {
            border-color: #cde0ec;
            box-shadow: 0 18px 30px -12px rgba(0, 0, 0, 0.08);
            transform: translateY(-2px);
        }

        .card-title {
            background: #fbfefe;
            padding: 1.2rem 1.5rem 0.8rem 1.5rem;
            border-bottom: 1px solid #eff3f8;
            display: flex;
            justify-content: space-between;
            align-items: baseline;
            flex-wrap: wrap;
        }

        .card-title h3 {
            font-weight: 650;
            font-size: 1.2rem;
            color: #2a6a87;
        }

        .badge {
            background: #e7f0f7;
            font-size: 0.7rem;
            padding: 0.25rem 0.8rem;
            border-radius: 30px;
            color: #2c6e8f;
            font-weight: 500;
        }

        .product-tags {
            padding: 1.2rem 1.5rem 1.5rem 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem 0.9rem;
        }

        .product-tag {
            background: #f4f8fc;
            padding: 0.45rem 1.2rem;
            border-radius: 3rem;
            font-size: 0.85rem;
            color: #2f4a6e;
            text-decoration: none;
            border: 1px solid #e2edf6;
            transition: all 0.2s;
            display: inline-block;
        }

        .product-tag:hover {
            background: #e8f0f8;
            border-color: #bbd4e8;
            color: #1c6e8f;
            transform: translateY(-1px);
        }

        /* 新闻资讯区域（仅保留新闻，二级栏目横向排列） */
        .news-section {
            background: #f9fbfe;
            border-radius: 1.5rem;
            padding: 1.5rem 2rem;
            margin: 1rem 0 2rem 0;
            border: 1px solid #e6eff6;
        }

        .news-section h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: #266d8c;
            margin-bottom: 1rem;
            border-left: 4px solid #3ba07c;
            padding-left: 0.8rem;
        }

        .news-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
        }

        .news-links a {
            background: white;
            padding: 0.5rem 1.5rem;
            border-radius: 2.5rem;
            text-decoration: none;
            color: #2c5a6e;
            font-size: 0.95rem;
            border: 1px solid #dce8f0;
            transition: 0.2s;
        }

        .news-links a:hover {
            background: #eef4fa;
            border-color: #bbd4e8;
            color: #1c6e8f;
        }

        /* 底部链接区 */
        .footer-area {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #ecf3f9;
            text-align: center;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.8rem;
            margin-bottom: 1.2rem;
        }

        .footer-links a {
            text-decoration: none;
            color: #5482a0;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .footer-links a:hover {
            color: #2c8faf;
            text-decoration: underline;
        }

        .copyright {
            font-size: 0.8rem;
            color: #8ba2bc;
            margin-top: 0.8rem;
        }

        /* 响应式 */
        @media (max-width: 800px) {
            body {
                padding: 1.2rem;
            }
            .container {
                padding: 1.5rem;
            }
            .site-header h1 {
                font-size: 1.9rem;
            }
            .product-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-links {
                gap: 1rem;
                flex-direction: column;
                align-items: center;
            }
            .nav-card {
                padding: 0.8rem 1.2rem;
            }
        }

        @media (max-width: 480px) {
            .product-tag {
                font-size: 0.75rem;
                padding: 0.3rem 1rem;
            }
        }
    </style>