/* 基础样式 */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #7c3aed;
            --text: #1e293b;
            --text-light: #64748b;
            --light: #f8fafc;
            --border: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text);
            background-color: var(--light);
        }
        
        /* 布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        section {
            padding: 80px 0;
        }
        
        /* 头部样式 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
        }
        
        /* 导航菜单 */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
        }
        
        .nav-menu li {
            margin-left: 30px;
        }
        
        .nav-menu a {
            color: var(--text);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            position: relative;
        }
        
        .nav-menu a:hover {
            color: var(--primary);
        }
        
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: width 0.3s;
        }
        
        .nav-menu a:hover::after {
            width: 100%;
        }
        
        /* 英雄区域 */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 80%;
            height: 200%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, rgba(37, 99, 235, 0) 70%);
            z-index: -1;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        
        .hero-text {
            flex: 1;
        }
        
        .hero-image {
            flex: 1;
            position: relative;
        }
        
        .hero-image img {
            width: 100%;
            max-width: 500px;
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
        }
        
        .hero-badge {
            position: absolute;
            top: -20px;
            right: -20px;
            background: white;
            padding: 15px 20px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            font-weight: 600;
            color: var(--primary);
        }
        
        h1 {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 30px;
            max-width: 500px;
        }
        
        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        
        .btn-primary {
            background-color: var(--primary);
            color: white;
            box-shadow: var(--shadow);
        }
        
        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
        }
        
        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            margin-left: 15px;
        }
        
        .btn-outline:hover {
            background-color: var(--primary);
            color: white;
        }
        
        .btn-icon {
            margin-right: 8px;
        }
        
        /* 关于部分 */
        .about {
            background-color: white;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        
        .about-content {
            display: flex;
            gap: 60px;
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }
        
        .about-text p {
            margin-bottom: 20px;
            color: var(--text-light);
        }
        
        .about-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            margin-top: 40px;
        }
        
        .stat-item {
            background-color: var(--light);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }
        
        .stat-label {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        .about-image {
            flex: 1;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        
        .about-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        /* 专长部分 */
        .expertise {
            background-color: var(--light);
        }
        
        .expertise-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .expertise-card {
            background-color: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: transform 0.3s ease;
        }
        
        .expertise-card:hover {
            transform: translateY(-10px);
        }
        
        .expertise-icon {
            width: 60px;
            height: 60px;
            background-color: rgba(37, 99, 235, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 1.5rem;
        }
        
        .expertise-card h3 {
            margin-bottom: 15px;
        }
        
        .expertise-card p {
            color: var(--text-light);
        }
        
        /* 页脚 */
        footer {
            background-color: var(--text);
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
            margin-bottom: 40px;
        }
        
        .footer-col {
            flex: 1;
            min-width: 250px;
        }
        
        .footer-col h3 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            color: white;
        }
        
        .footer-col p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 15px;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
        }
        
        .social-link {
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .social-link:hover {
            background-color: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column-reverse;
            }
            
            .hero-text {
                text-align: center;
            }
            
            .hero p {
                margin-left: auto;
                margin-right: auto;
            }
            
            .btn-group {
                justify-content: center;
            }
            
            .about-content {
                flex-direction: column;
            }
            
            .hero-badge {
                right: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                background-color: white;
                flex-direction: column;
                align-items: center;
                padding: 30px 0;
                box-shadow: var(--shadow-lg);
                transition: all 0.5s ease;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 15px 0;
            }
            
            h1 {
                font-size: 2.5rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .btn-group {
                flex-direction: column;
            }
            
            .btn-outline {
                margin-left: 0;
                margin-top: 15px;
            }
        }
        
        @media (max-width: 576px) {
            h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            section {
                padding: 60px 0;
            }
            
            .about-stats {
                grid-template-columns: 1fr;
            }
        }