/* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        :root {
            --primary: #0a2540;
            --secondary: #0066ff;
            --accent: #00d4ff;
            --light: #f8f9fa;
            --dark: #1a1a2e;
            --gray: #6c757d;
            --light-gray: #e9ecef;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #fff;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 按钮样式 */
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background: var(--secondary);
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
        }
        
        .btn:hover {
            background: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 102, 255, 0.2);
        }
        
        .btn-accent {
            background: var(--accent);
            color: var(--dark);
        }
        
        .btn-accent:hover {
            background: #00b8e6;
        }
        
        /* 头部导航 */
        header {
            background-color: rgba(10, 37, 64, 0.95);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            color: white;
            font-size: 24px;
            font-weight: 700;
        }
        
        .logo span {
            color: var(--accent);
        }
        
        .logo i {
            color: var(--accent);
            font-size: 28px;
            margin-right: 10px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        nav ul li a:hover {
            color: var(--accent);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(rgba(10, 37, 64, 0.9), rgba(26, 26, 46, 0.9)), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?ixlib=rb-4.0.3&auto=format&fit=crop&w=2072&q=80');
            background-size: cover;
            background-attachment: fixed;
            color: white;
            padding: 180px 0 120px;
            text-align: center;
        }
        
        .hero h2 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
            color: rgba(255, 255, 255, 0.9);
        }
        
        /* 服务介绍 */
        .services {
            padding: 100px 0;
            background-color: var(--light);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .service-card {
            background: white;
            border-radius: 8px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
        }
        
        .service-icon i {
            font-size: 32px;
            color: white;
        }
        
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--primary);
        }
        
        /* GEO优化解释 */
        .geo-explanation {
            padding: 100px 0;
            background-color: white;
        }
        
        .geo-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .geo-text {
            flex: 1;
        }
        
        .geo-text h2 {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        
        .geo-text p {
            margin-bottom: 20px;
            color: var(--gray);
        }
        
        .geo-visual {
            flex: 1;
            background: linear-gradient(135deg, var(--primary), var(--dark));
            border-radius: 10px;
            padding: 40px;
            color: white;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .geo-visual h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--accent);
        }
        
        .geo-visual ul {
            list-style: none;
        }
        
        .geo-visual ul li {
            margin-bottom: 15px;
            padding-left: 25px;
            position: relative;
        }
        
        .geo-visual ul li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: bold;
        }
        
        /* 优势部分 */
        .advantages {
            padding: 100px 0;
            background-color: var(--light);
        }
        
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .advantage-item {
            text-align: center;
            padding: 30px;
        }
        
        .advantage-number {
            display: inline-block;
            width: 60px;
            height: 60px;
            background: var(--secondary);
            color: white;
            border-radius: 50%;
            line-height: 60px;
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        /* CTA区域 */
        .cta {
            padding: 100px 0;
            background: linear-gradient(rgba(10, 37, 64, 0.9), rgba(26, 26, 46, 0.9)), url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-attachment: fixed;
            color: white;
            text-align: center;
        }
        
        .cta h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .cta p {
            max-width: 700px;
            margin: 0 auto 40px;
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--accent);
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 10px;
        }
        
        .footer-column ul li a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-column ul li a:hover {
            color: var(--accent);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero h2 {
                font-size: 2.8rem;
            }
            
            .geo-content {
                flex-direction: column;
            }
        }
        
        @media (max-width: 768px) {
            nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--primary);
                flex-direction: column;
                padding: 20px 0;
                text-align: center;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }
            
            nav ul.show {
                display: flex;
            }
            
            nav ul li {
                margin: 10px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero h2 {
                font-size: 2.2rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 576px) {
            .hero {
                padding: 150px 0 80px;
            }
            
            .hero h2 {
                font-size: 1.8rem;
            }
            
            .services, .geo-explanation, .advantages, .cta {
                padding: 70px 0;
            }
        }