:root {
            --primary: #2c3e50;
            --secondary: #27ae60;
            --light: #f8f9fa;
        }

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

        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
        }

        /* 导航栏 */
        .navbar {
            background: var(--primary);
            padding: 1rem;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .navbar-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            transition: opacity 0.3s;
        }

        .nav-links a:hover {
            opacity: 0.8;
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 首屏 */
        .hero-section {
            background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(39, 174, 96, 0.8)),
                        url('data:image/webp;base64,UklGRlIAAABXRUJQVlA4IEYAAAAvAAAAAIeEAS0AAAV0YFN4mJw4GjD9/2ckCRDEGVZQOCDiAAAAUA==');
            background-size: cover;
            background-position: center;
            height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            padding: 2rem;
        }

        .hero-title {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .cta-button {
            background: var(--secondary);
            color: white;
            padding: 1rem 2rem;
            border: none;
            text-decoration: none;
            border-radius: 25px;
            font-size: 1.1rem;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(39, 174, 96, 0.4);
        }

        .cta-button:active {
            transform: scale(0.98);
        }

        /* 核心理念 */
        .core-values {
            background: var(--light);
            padding: 4rem 1rem;
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            font-size: 2rem;
            color: var(--primary);
        }

        .section-title-2 {
            text-align: center;
            margin-bottom: 3rem;
            font-size: 2rem;
            color: white;
        }

        .core-values-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .core-value-card {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
            text-align: center;
            transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), 
                        box-shadow 0.3s ease;
        }

        .core-value-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
        }

        .core-value-card i {
            color: var(--secondary);
            margin-bottom: 1rem;
            font-size: 2.5rem;
        }

        /* 功能对比表格 */
        .comparison-section {
            padding: 4rem 1rem;
            background: var(--light);
        }

        .comparison-table {
            max-width: 1200px;
            margin: 0 auto;
            overflow-x: auto;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        th, td {
            padding: 1.2rem;
            text-align: center;
            border-bottom: 1px solid #eee;
        }

        th {
            background: var(--primary);
            color: white;
            font-weight: 500;
        }

        tr:nth-child(even) {
            background-color: #f8f9fa;
        }

        .price-tag {
            display: block;
            font-size: 1.3rem;
            margin: 0.5rem 0;
        }

        .category-row {
            background: #f1f2f6;
            font-weight: bold;
            color: var(--primary);
        }

        .fa-check {
            color: #27ae60;
        }

        .fa-times {
            color: #e74c3c;
        }

        /* 优势模块 */
        .advantages {
            background: var(--primary);
            color: white;
            padding: 4rem 1rem;
        }

        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .advantage-item {
            text-align: center;
            padding: 2rem;
        }

        .advantage-item i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        /* 页脚 */
        footer {
            background: var(--primary);
            color: white;
            text-align: center;
            padding: 2rem 1rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto 1rem;
        }

        .social-links a {
            color: white;
            margin: 0 0.5rem;
            font-size: 1.2rem;
            transition: opacity 0.3s;
        }

        .social-links a:hover {
            opacity: 0.8;
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                background: rgba(44, 62, 80, 0.95);
                padding: 1rem;
                justify-content: space-around;
                flex-direction: row;
            }

            .nav-links.active {
                display: flex;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero-title {
                font-size: 2rem;
            }

            /* 响应式表格优化 */
            .comparison-table table, 
            .comparison-table thead, 
            .comparison-table tbody, 
            .comparison-table th, 
            .comparison-table td, 
            .comparison-table tr { 
                display: block; 
            }
            
            .comparison-table thead tr { 
                position: absolute;
                top: -9999px;
                left: -9999px;
            }
            
            .comparison-table tr {
                border: 2px solid #eee;
                margin-bottom: 1rem;
            }
            
            .comparison-table td {
                border: none;
                position: relative;
                padding-left: 50%;
                text-align: left;
            }
            
            .comparison-table td:before {
                position: absolute;
                left: 1rem;
                width: 45%;
                padding-right: 10px;
                white-space: nowrap;
                content: attr(data-label);
                font-weight: bold;
                color: var(--primary);
            }
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        @keyframes ripple {
            from { transform: scale(0); opacity: 1; }
            to { transform: scale(4); opacity: 0; }
        }
        .legal-links {
            margin-bottom: 1rem;
        }

        .legal-links a {
            color: white;
            text-decoration: none;
            margin: 0 1rem;
        }