   <style>
        /* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        
        body {
            color: #333;
            line-height: 1.6;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 1px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo-img {
            margin: 0;
            width: 60px;
            height: 60px;
            background-color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-right: 5px;
            color: white;
            font-weight: bold;
            font-size: 24px;
        }
        
.logo-text h1 {
    margin: 0;
  letter-spacing: 0.5em; 
    font-size: 24px;
    font-weight: bold;
    color: #333;
    line-height: 1.2;
}
        
.logo-text p {
    margin: 0; 
   letter-spacing: 0.12em; 
    font-size: 12px;
    color: #666;
    line-height: 1.5;
}

        
        /* 导航栏 */
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
            position: relative;
        }
        
        nav ul li a {
            font-weight: 500;
            padding: 5px 0;
            transition: color 0.3s;
        }
        
        nav ul li a:hover {
            color: #4CAF50;
        }
        
        nav ul li.active a {
            color: #4CAF50;
            border-bottom: 2px solid #4CAF50;
        }
        
        /* 英雄区域 */
.hero {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
    overflow: hidden;
}

.hero-slides {
    position: absolute;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5));
}

.hero-slide:nth-child(1) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('hero1.jpg');
    animation: fade 12s infinite;
}

.hero-slide:nth-child(2) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('hero2.jpg');
    animation: fade 12s infinite 4s;
}

.hero-slide:nth-child(3) {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('hero3.jpg');
    animation: fade 12s infinite 8s;
}

@keyframes fade {
    0%, 100% { opacity: 0; }
    20%, 80% { opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

        .hero h2 {
            font-size: 48px;
            margin-bottom: 20px;
            color: #fff;
        }
        
        .hero p {
            font-size: 20px;
            margin-bottom: 30px;
            color: #eee;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: #4CAF50;
            color: white;
            border-radius: 4px;
            font-weight: bold;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            background-color: #3e8e41;
            transform: translateY(-2px);
        }
        
        /* 业务板块 */
        .services {
            padding: 80px 0;
            background-color: #f9f9f9;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: #333;
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .service-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        .service-img {
            height: 200px;
            background-color: #ddd;
            background-size: cover;
            background-position: center;
        }
        
        .service-content {
            padding: 25px;
        }
        
        .service-content h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: #333;
        }
        
        .service-content p {
            color: #666;
            margin-bottom: 20px;
        }
        
        /* 关于我们 */
        .about {
            padding: 100px 0;
            background-color: white;
        }
        
        .about-container {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .about-img {
            flex: 1;
            min-height: 400px;
            background-color: #f1f1f1;
            border-radius: 8px;
            background-image: url('about.jpg');
            background-size: cover;
            background-position: center;
        }
        
        .about-content {
            flex: 1;
        }
        
        .about-content h2 {
            font-size: 36px;
            margin-bottom: 20px;
            color: #333;
        }
        
        .about-content p {
            margin-bottom: 20px;
            color: #666;
        }
        
        /* 联系方式 */
        .contact {
            padding: 80px 0;
            background-color: #f9f9f9;
        }
        
        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .contact-info {
            background-color: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .contact-info h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: #333;
        }
        
        .contact-info p {
            margin-bottom: 15px;
            color: #666;
            display: flex;
            align-items: center;
        }
        
        .contact-info i {
            margin-right: 10px;
            color: #4CAF50;
        }
        
        /* 页脚 */
        footer {
            background-color: #222;
            color: #aaa;
            padding: 50px 0 20px;
        }
        
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-col h3 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-col h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: #4CAF50;
        }
        
        .footer-col p {
            margin-bottom: 15px;
        }
        
        .footer-col ul {
            list-style: none;
        }
        
        .footer-col ul li {
            margin-bottom: 10px;
        }
        
        .footer-col ul li a:hover {
            color: #4CAF50;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transition: all 0.3s;
        }
        
        .social-links a:hover {
            background-color: #4CAF50;
            color: white;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 14px;
        }
        
/* ========================
   响应式设计 - 增强版
   ======================== */

/* 大平板和笔记本设备 (992px以下) */
@media (max-width: 992px) {
    .about-container, 
    .container {
        flex-direction: column;
        gap: 30px;
    }
    
    .about-img {
        width: min(100%, 600px);
        margin: 0 auto;
        align-self: center;
    }
    
    /* 添加卡片布局优化 */
    .values-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 调整时间轴位置 */
    .timeline::before {
        left: 15px;
    }
    
    .timeline-year {
        left: -55px;
    }
}

/* 平板设备 (768px以下) */
@media (max-width: 768px) {
    /* 增强布局控制 */
    .header-container,
    .container {
        flex-direction: column;
        text-align: center;
        padding: 20px 0;
    }
    
    /* 优化导航菜单 */
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
        padding: 0 15px;
    }
    
    nav ul li {
        margin: 0;
    }
    
    /* 改进文字可读性 */
    .hero h2 {
        font-size: clamp(28px, 5vw, 36px);
        line-height: 1.2;
        margin-bottom: 15px;
    }
    
    .hero p {
        font-size: clamp(16px, 2.5vw, 18px);
    }

    .hero-content {
        padding: 0 25px;
    }
    
    /* 单列布局调整 */
    .values-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    /* 时间轴响应式 */
    .timeline {
        padding-left: 30px;
    }
    
    .timeline-year {
        position: relative;
        left: auto;
        top: -15px;
        width: auto;
        display: inline-block;
        padding: 5px 15px;
        margin-bottom: 10px;
    }
    
    .timeline-content {
        padding: 20px;
    }
}

/* 手机设备 (576px以下) */
@media (max-width: 576px) {
    /* 自适应高度 */
    .hero {
        height: clamp(350px, 70vh, 400px);
    }
    
    /* 文本优化 */
    .hero h2 {
        font-size: clamp(24px, 5vw, 28px);
        word-break: keep-all;
    }
    
    .section-title h2 {
        font-size: clamp(24px, 5vw, 28px);
    }

    /* 紧凑导航 */
    nav ul {
        gap: 8px 12px;
    }
    
    /* 减少内边距 */
    .about-intro,
    .timeline-item,
    .team-card,
    .value-card {
        padding: 15px;
    }
    
    /* 调整图片高度 */
    .about-image,
    .team-image {
        height: 300px;
    }
}

/* 超小屏幕设备 (400px以下) */
@media (max-width: 400px) {
    /* 微调字体大小 */
    .hero h2 {
        font-size: 22px;
    }
    
    .section-title h2 {
        font-size: 22px;
    }
    
    /* 更紧凑的布局 */
    nav ul {
        gap: 6px;
    }
    
    /* 隐藏部分次要元素 */
    .logo-text p {
        display: none;
    }
    
    /* 简化页脚 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
    }
}

/* ========================
   响应式增强实用类
   ======================== */

/* 移动设备隐藏/显示控制 */
.mobile-only {
    display: none;
}
@media (max-width: 768px) {
    .mobile-only {
        display: block;
    }
    .desktop-only {
        display: none;
    }
}

/* 响应式间距控制 */
.responsive-padding {
    padding: clamp(15px, 3vw, 30px);
}

.responsive-margin {
    margin: clamp(10px, 2vw, 20px);
}

/* 响应式字体大小 */
.responsive-heading {
    font-size: clamp(20px, 4vw, 32px);
}

.responsive-text {
    font-size: clamp(14px, 2vw, 16px);
}


    </style>