<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>北京华焱坤泰科技有限公司 - 科技创新 赋能未来</title>
    <link rel="stylesheet" href="css/index.css">
    <script src="js/articles.js"></script>

    <link rel="icon" href="favicon.ico" mce_href="favicon.ico" type="image/x-icon">
    <link rel="shortcut icon" href="favicon.ico" mce_href="favicon.ico" type="image/x-icon">

    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-color: #0066ff;
            --secondary-color: #00d4ff;
            --accent-color: #ff6b00;
            --dark-bg: #0a0e27;
            --card-bg: rgba(255, 255, 255, 0.05);
            --text-light: #ffffff;
            --text-gray: #a0a0a0;
            --max-width: 1200px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--dark-bg);
            color: var(--text-light);
            overflow-x: hidden;
            line-height: 1.6;
        }

        /* 导航栏 */
        /* 导航栏 - 优化版 */
        nav {
            position: fixed;
            top: 0;
            width: 100%;
            background: linear-gradient(180deg, rgba(10, 14, 39, 0.95) 0%, rgba(10, 14, 39, 0.85) 100%);
            backdrop-filter: blur(20px);
            z-index: 1000;
            padding: 0;
            transition: all 0.4s ease;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .nav-container {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 3rem;
            position: relative;
        }

        /* 导航栏装饰线 */
        .nav-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 3rem;
            right: 3rem;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--secondary-color), transparent);
            opacity: 0.3;
        }

        
        .logo {
            display: flex;
            align-items: center;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .logo-img {
            height: 40px;
            width: auto;
            display: block;
            filter: brightness(1.2) contrast(1.1);
            transition: all 0.3s ease;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-links a:hover {
            color: var(--secondary-color);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary-color);
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        /* 英雄区域 */
        .hero {
            height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
        }

        /* 增强的科技背景图 */
        .hero-tech-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('img/bg001.png');
            background-size: cover, cover;
            background-position: center, center;
            opacity: 0.25;
            z-index: 0;
            animation: bg-shift 20s ease-in-out infinite;
        }

        @keyframes bg-shift {
            0%, 100% { background-position: center center, center center; }
            50% { background-position: center top, center bottom; }
        }

        /* 增强的科技网格背景 */
        .hero-grid {
            position: absolute;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(0, 212, 255, 0.15) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.15) 1px, transparent 1px);
            background-size: 40px 40px;
            animation: grid-move 15s linear infinite;
            z-index: 1;
        }

        @keyframes grid-move {
            0% { transform: translate(0, 0); }
            100% { transform: translate(40px, 40px); }
        }

        /* 增强的科技粒子效果 */
        .hero-particles {
            position: absolute;
            width: 100%;
            height: 100%;
            z-index: 2;
        }

        .particle {
            position: absolute;
            width: 3px;
            height: 3px;
            background: var(--secondary-color);
            border-radius: 50%;
            opacity: 0;
            animation: particle-float 8s infinite;
            box-shadow: 0 0 6px var(--secondary-color);
        }

        @keyframes particle-float {
            0% {
                opacity: 0;
                transform: translateY(100vh) translateX(0) scale(0);
            }
            10% {
                opacity: 1;
                transform: translateY(90vh) translateX(10px) scale(1);
            }
            90% {
                opacity: 1;
                transform: translateY(10vh) translateX(20px) scale(1);
            }
            100% {
                opacity: 0;
                transform: translateY(0) translateX(30px) scale(0);
            }
        }

        /* 增强的渐变背景 */
        .hero-bg {
            position: absolute;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 30% 40%, rgba(0, 102, 255, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(0, 212, 255, 0.3) 0%, transparent 50%);
            animation: pulse 3s ease-in-out infinite;
            z-index: 3;
        }

        @keyframes pulse {
            0%, 100% { 
                transform: scale(1); 
                opacity: 0.3; 
            }
            50% { 
                transform: scale(1.05); 
                opacity: 0.4; 
            }
        }

        .hero-content {
            text-align: center;
            z-index: 4;
            max-width: 800px;
            padding: 0 2rem;
            position: relative;
        }

        .hero h1 {
            font-size: 4rem;
            margin-bottom: 1.5rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--accent-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: fadeInUp 1s ease;
            text-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
            letter-spacing: 2px;
        }

        .hero p {
            font-size: 1.4rem;
            color: var(--text-gray);
            margin-bottom: 2.5rem;
            animation: fadeInUp 1s ease 0.2s;
            animation-fill-mode: both;
            text-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
        }

        .cta-button {
            display: inline-block;
            padding: 1.2rem 3rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            transition: all 0.3s ease;
            animation: fadeInUp 1s ease 0.4s;
            animation-fill-mode: both;
            box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
            font-size: 1.1rem;
            letter-spacing: 1px;
        }

        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 102, 255, 0.6);
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(40px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 通用容器样式 */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* 关于我们 - 简化版 */
        .about-us {
            padding: 5rem 0;
            background: #0f1429;
        }

        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        }

        .about-content {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 3rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }

        .about-text {
            max-width: 900px;
            margin: 0 auto 2rem;
        }

        .about-text h3 {
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: var(--secondary-color);
        }

        .about-text p {
            color: var(--text-gray);
            line-height: 1.8;
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
        }

        .about-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin: 3rem 0;
        }

        .stat-item {
            text-align: center;
            padding: 1.5rem;
            background: rgba(0, 102, 255, 0.1);
            border-radius: 10px;
            transition: all 0.3s ease;
        }

        .stat-item:hover {
            transform: translateY(-3px);
            background: rgba(0, 102, 255, 0.15);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        .stat-label {
            color: var(--text-gray);
            font-size: 0.95rem;
        }

        .certifications {
            margin-top: 2rem;
        }

        .certifications h4 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: var(--text-light);
        }

        .cert-list {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .cert-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.8rem 1.2rem;
            background: rgba(255, 107, 0, 0.1);
            border-radius: 20px;
            transition: all 0.3s ease;
        }

        .cert-item:hover {
            background: rgba(255, 107, 0, 0.2);
            transform: translateY(-2px);
        }

        .cert-icon {
            font-size: 1.2rem;
            color: var(--accent-color);
        }

        .cert-text {
            color: var(--text-light);
            font-size: 0.9rem;
            font-weight: 500;
        }

        /* 业务领域 */
        .business-areas {
            padding: 5rem 0;
            background: #0a0e27;
        }

        .business-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .business-card {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 15px;
            padding: 2rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .business-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, transparent, rgba(0, 212, 255, 0.1), transparent);
            transform: translateX(-100%);
            transition: transform 0.6s ease;
        }

        .business-card:hover::before {
            transform: translateX(100%);
        }

        .business-card:hover {
            transform: translateY(-5px);
            border-color: var(--secondary-color);
            box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
        }

        .business-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }

        .business-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text-light);
        }

        .business-card p {
            color: var(--text-gray);
            line-height: 1.8;
        }

        /* 技术实力 */
        .tech-strength {
            padding: 5rem 0;
            background: #0f1429;
        }

        .tech-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .tech-item {
            text-align: center;
            padding: 2rem;
            background: var(--card-bg);
            border-radius: 15px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s ease;
        }

        .tech-item:hover {
            background: rgba(0, 102, 255, 0.1);
            border-color: var(--primary-color);
            transform: scale(1.05);
        }

        .tech-icon {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 1rem;
        }

        .tech-item h4 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }

        .tech-item p {
            color: var(--text-gray);
            font-size: 0.9rem;
        }

        /* 解决方案 */
        .solutions {
            padding: 5rem 0;
            background: #0a0e27;
        }

        .tab-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 3rem;
            flex-wrap: wrap;
        }

        .tab-button {
            padding: 0.8rem 1.5rem;
            background: transparent;
            border: 1px solid var(--primary-color);
            color: var(--text-light);
            border-radius: 25px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
        }

        .tab-button.active {
            background: var(--primary-color);
            color: white;
        }

        .tab-button:hover {
            background: var(--primary-color);
            color: white;
        }

        .tab-content {
            display: none;
            animation: fadeIn 0.5s ease;
        }

        .tab-content.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .solution-detail {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 3rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .solution-detail h3 {
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: var(--secondary-color);
        }

        .solution-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }

        .feature-icon {
            color: var(--accent-color);
            font-size: 1.5rem;
            flex-shrink: 0;
        }

        /* 联系我们 */
        .contact {
            padding: 5rem 0;
            background: #0f1429;
        }

        .contact-info {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 3rem;
            border: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            max-width: 1000px;
            margin: 0 auto;
        }

        .contact-item {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 2rem;
            padding: 1.5rem;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 10px;
            transition: all 0.3s ease;
        }

        .contact-item:hover {
            background: rgba(0, 102, 255, 0.1);
            transform: translateY(-3px);
        }

        .contact-item:last-child {
            margin-bottom: 0;
        }

        .contact-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            flex-shrink: 0;
        }

        .contact-text {
            text-align: left;
        }

        .contact-text h4 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }

        .contact-text p {
            color: var(--text-gray);
            font-size: 1rem;
        }

        .contact-cta {
            margin-top: 3rem;
        }

        .contact-button {
            display: inline-block;
            padding: 1rem 2.5rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
        }

        .contact-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
        }

        /* 页脚 */
        footer {
            background: #050815;
            padding: 3rem 0;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-content {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 2rem;
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .social-links a {
            color: var(--text-gray);
            font-size: 1.5rem;
            transition: color 0.3s ease;
        }

        .social-links a:hover {
            color: var(--secondary-color);
        }

        .copyright {
            color: var(--text-gray);
            font-size: 0.9rem;
        }

        /* 文章资讯 */
        .articles {
            display: none;
            padding: 5rem 0;
            background: #0f1429;
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .article-card {
            background: var(--card-bg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 15px;
            padding: 2rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .article-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, transparent, rgba(0, 212, 255, 0.08), transparent);
            transform: translateX(-100%);
            transition: transform 0.6s ease;
            z-index: 0;
        }

        .article-card:hover::before {
            transform: translateX(100%);
        }

        .article-card:hover {
            transform: translateY(-5px);
            border-color: var(--secondary-color);
            box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
        }

        .article-card-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 1.2rem;
            position: relative;
            z-index: 1;
        }

        .article-card-date {
            display: inline-block;
            font-size: 0.8rem;
            color: var(--accent-color);
            background: rgba(255, 107, 0, 0.12);
            padding: 0.3rem 0.8rem;
            border-radius: 15px;
            margin-bottom: 1rem;
            align-self: flex-start;
            position: relative;
            z-index: 1;
        }

        .article-card-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-light);
            margin-bottom: 0.8rem;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            position: relative;
            z-index: 1;
        }

        .article-card-excerpt {
            color: var(--text-gray);
            font-size: 0.92rem;
            line-height: 1.7;
            margin-bottom: 1.5rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            position: relative;
            z-index: 1;
        }

        .article-read-more {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.2rem;
            background: transparent;
            border: 1px solid var(--primary-color);
            color: var(--text-light);
            border-radius: 25px;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            align-self: flex-start;
            text-decoration: none;
            position: relative;
            z-index: 1;
        }

        .article-read-more:hover {
            background: var(--primary-color);
            color: white;
        }

        .article-read-more i {
            transition: transform 0.3s ease;
        }

        .article-read-more:hover i {
            transform: translateX(3px);
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

            .hero p {
                font-size: 1.1rem;
            }

            .section-title {
                font-size: 2rem;
            }

            .about-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }

            .cert-list {
                justify-content: center;
            }

            .business-grid,
            .tech-grid {
                grid-template-columns: 1fr;
            }

            .contact-item {
                flex-direction: column;
                text-align: center;
            }

            .contact-text {
                text-align: center;
            }

            .articles-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .about-stats {
                grid-template-columns: 1fr;
            }

            .cert-item {
                font-size: 0.8rem;
                padding: 0.6rem 1rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
    </style>
</head>
<body>
    <!-- 导航栏 -->
    <nav>
        <div class="nav-container">
            <!-- <div class="logo">华焱坤泰科技</div> -->
            <!-- 图片Logo -->
            <a href="#home" class="logo" id="mainLogo">
                <img src="img/logo.png" alt="华焱坤泰科技" class="logo-img" onerror="this.parentElement.classList.add('logo-img-fallback')">
            </a>
            <ul class="nav-links">
                <li><a href="#home">首页</a></li>
                <li><a href="#about">关于我们</a></li>
                <li><a href="#business">业务领域</a></li>
                <li><a href="#tech">技术实力</a></li>
                <li><a href="#solutions">解决方案</a></li>
                <li style="display: none;"><a href="#articles">文章资讯</a></li>
                <li><a href="#contact">联系我们</a></li>
            </ul>
        </div>
    </nav>

    <!-- 英雄区域 -->
    <section class="hero" id="home">
        <!-- 增强的科技背景图 -->
        <div class="hero-tech-bg"></div>
        
        <!-- 增强的科技网格背景 -->
        <div class="hero-grid"></div>
        
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                el.style.transition = 'all 0.6s ease';
                observer.observe(el);
            });
        }

        // ========== 原有JS ==========

        // 添加滚动动画
        const observerOptions = {
            threshold: 0.1,
            rootMargin: '0px 0px -100px 0px'
        };

        const observer = new IntersectionObserver(function(entries) {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.style.opacity = '1';
                    entry.target.style.transform = 'translateY(0)';
                }
            });
        }, observerOptions);

        // 观察所有卡片
        document.querySelectorAll('.business-card, .tech-item, .about-content, .solution-detail').forEach(el => {
            el.style.opacity = '0';
            el.style.transform = 'translateY(20px)';
            el.style.transition = 'all 0.6s ease';
            observer.observe(el);
        });

        // 观察联系信息项
        document.querySelectorAll('.contact-item').forEach(el => {
            el.style.opacity = '0';
            el.style.transform = 'translateY(20px)';
            el.style.transition = 'all 0.6s ease';
            observer.observe(el);
        });

        // 数字动画
        function animateNumbers() {
            const numbers = document.querySelectorAll('.stat-number');
            numbers.forEach(num => {
                const target = parseInt(num.innerText);
                let current = 0;
                const increment = target / 50;
                const timer = setInterval(() => {
                    current += increment;
                    if (current >= target) {
                        current = target;
                        clearInterval(timer);
                    }
                    num.innerText = Math.floor(current) + (num.innerText.includes('+') ? '+' : '');
                }, 30);
            });
        }

        // 当统计卡片进入视口时触发数字动画
        const statObserver = new IntersectionObserver(function(entries) {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    animateNumbers();
                    statObserver.unobserve(entry.target);
                }
            });
        }, { threshold: 0.5 });

        const statsContainer = document.querySelector('.about-stats');
        if (statsContainer) {
            statObserver.observe(statsContainer);
        }

        // 初始化文章板块
        renderArticles();
    </script>
</body>
</html>