:root {
            --primary-color: #00d9ff;
            --secondary-color: #8a2be2;
            --accent-color: #ff2a6d;
            --dark-bg: #0a0e17;
            --darker-bg: #050811;
            --card-bg: rgba(10, 14, 23, 0.85);
            --text-light: #ffffff;
            --text-dim: #a0b1c5;
        }
        a {
            color: inherit;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.3s ease;
            padding: 0.2em 0;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Exo 2', sans-serif;
            background-color: #0f172a;
            color: #e2e8f0;
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            padding-top: 80px; 
        }
        
        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(5, 8, 17, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 217, 255, 0.1);
            z-index: 1000;
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        
        .main-nav.scrolled {
            background: rgba(5, 8, 17, 0.98);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }
        
        .nav-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 15px;
            text-decoration: none;
        }
        
        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 18px;
        }
        
        .nav-logo-text {
            font-family: 'Orbitron', sans-serif;
            font-weight: 700;
            font-size: 20px;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        
        .nav-item {
            position: relative;
        }
        
        .nav-link {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            padding: 10px 0;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .nav-link:hover {
            color: var(--primary-color);
        }
        
        .nav-link.active {
            color: var(--primary-color);
        }
        
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        
        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 24px;
            cursor: pointer;
            padding: 5px;
            transition: color 0.3s ease;
        }
        
        .mobile-menu-btn:hover {
            color: var(--primary-color);
        }
        
        /* 网格背景 */
        .grid-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            opacity: 0.1;
            background-image: 
                linear-gradient(rgba(0, 217, 255, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 217, 255, 0.05) 1px, transparent 1px);
            background-size: 50px 50px;
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            padding: 15px 0;
            font-size: 14px;
            background: var(--card-bg);
            margin: 20px 0 30px;
            border-radius: 10px;
            padding: 15px 20px;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        .breadcrumb span {
            color: var(--text-dim);
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(138, 43, 226, 0.1));
            border-radius: 20px;
            padding: 60px 40px;
            margin: 40px 0;
            text-align: center;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
        }
        
        .hero-content h1 {
            color: var(--primary-color);
            font-size: 36px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
        }
        
        .hero-content p {
            color: var(--text-dim);
            font-size: 18px;
            max-width: 800px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        
        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }
        
        .btn {
            padding: 15px 30px;
            border-radius: 10px;
            border: none;
            font-family: 'Exo 2', sans-serif;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 16px;
            text-decoration: none;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 217, 255, 0.3);
        }
        
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-light);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
        }
        
        .hero-features {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
        }
        
        .feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-dim);
            font-size: 14px;
        }
        
        .feature-item i {
            color: var(--primary-color);
        }
        
        /* 技术说明部分 */
        .technical-explanation {
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.05), rgba(138, 43, 226, 0.05));
            border-radius: 20px;
            padding: 60px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .technical-explanation .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .technical-explanation .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .tech-card {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 30px;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        
        .tech-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary-color);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
        }
        
        .tech-icon {
            font-size: 40px;
            margin-bottom: 20px;
            color: var(--primary-color);
        }
        
        .tech-content h3 {
            color: var(--primary-color);
            margin-bottom: 15px;
            font-size: 22px;
            font-family: 'Orbitron', sans-serif;
        }
        
        .tech-content p {
            color: var(--text-dim);
            line-height: 1.7;
            margin-bottom: 15px;
        }
        
        .tech-content ul {
            list-style: none;
            margin-top: 15px;
            padding-left: 0;
        }
        
        .tech-content li {
            margin-bottom: 8px;
            padding-left: 25px;
            position: relative;
            color: var(--text-dim);
        }
        
        .tech-content li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: bold;
        }
        
        .data-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        
        .data-item {
            text-align: center;
            padding: 20px;
            background: var(--card-bg);
            border-radius: 10px;
            border: 1px solid rgba(0, 217, 255, 0.1);
        }
        
        .data-number {
            display: block;
            font-size: 36px;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 5px;
            font-family: 'Orbitron', sans-serif;
        }
        
        .data-label {
            font-size: 14px;
            color: var(--text-dim);
        }
        
        /* 对比部分 */
        .comparison-section {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .comparison-section .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .comparison-section .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .comparison-table {
            margin: 40px auto;
            max-width: 1000px;
            overflow-x: auto;
        }
        
        .comparison-table table {
            width: 100%;
            border-collapse: collapse;
            background: rgba(5, 8, 17, 0.5);
            border-radius: 10px;
            overflow: hidden;
        }
        
        .comparison-table th {
            background: rgba(0, 217, 255, 0.1);
            color: var(--primary-color);
            padding: 15px;
            text-align: center;
            font-family: 'Orbitron', sans-serif;
            font-weight: 600;
        }
        
        .comparison-table td {
            padding: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            color: var(--text-light);
        }
        
        .comparison-table tr:hover {
            background: rgba(0, 217, 255, 0.05);
        }
        
        .text-success {
            color: #00ff9d !important;
            font-weight: bold;
        }
        
        /* 核心服务部分 */
        .core-services {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .core-services .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .core-services .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .service-card, .feature-card {
            background: rgba(5, 8, 17, 0.5);
            border-radius: 15px;
            padding: 30px;
            border: 1px solid rgba(0, 217, 255, 0.1);
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .service-card:hover, .feature-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary-color);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            margin: 0 auto 25px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        
        .feature-title {
            color: var(--text-light);
            font-size: 20px;
            margin-bottom: 15px;
            font-family: 'Exo 2', sans-serif;
            font-weight: 600;
        }
        
        .feature-description {
            color: var(--text-dim);
            line-height: 1.7;
            font-size: 15px;
        }
        
        /* 案例研究部分 */
        .case-studies {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .case-studies .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .case-studies .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .case-tabs {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin: 30px 0;
            flex-wrap: wrap;
        }
        
        .tab-btn {
            padding: 12px 30px;
            background: rgba(5, 8, 17, 0.5);
            border: 1px solid rgba(0, 217, 255, 0.1);
            border-radius: 30px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
            color: var(--text-light);
        }
        
        .tab-btn.active {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border-color: transparent;
        }
        
        .case-content {
            background: rgba(5, 8, 17, 0.7);
            border-radius: 15px;
            padding: 40px;
            border: 1px solid rgba(0, 217, 255, 0.1);
        }
        
        .case-timeline {
            display: none;
        }
        
        .case-timeline.active {
            display: block;
        }
        
        .timeline-item {
            display: flex;
            margin-bottom: 30px;
            align-items: flex-start;
        }
        
        .timeline-date {
            flex: 0 0 100px;
            font-weight: bold;
            color: var(--primary-color);
            font-family: 'Orbitron', sans-serif;
        }
        
        .timeline-content {
            flex: 1;
            padding-left: 30px;
            border-left: 3px solid var(--primary-color);
            position: relative;
        }
        
        .timeline-content:before {
            content: "";
            position: absolute;
            left: -10px;
            top: 0;
            width: 15px;
            height: 15px;
            background: var(--primary-color);
            border-radius: 50%;
        }
        
        .timeline-content h4 {
            color: var(--text-light);
            margin-bottom: 10px;
            font-size: 18px;
        }
        
        .timeline-content p {
            color: var(--text-dim);
            line-height: 1.7;
        }
        
        /* 价格部分 */
        .pricing {
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.05), rgba(138, 43, 226, 0.05));
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .pricing .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .pricing .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .promo-label {
            text-align: center;
            color: var(--accent-color);
            font-weight: bold;
            margin-bottom: 30px;
            font-size: 18px;
        }
        
        .pricing-table {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .pricing-card {
            background: var(--card-bg);
            border-radius: 15px;
            padding: 40px 30px;
            border: 1px solid rgba(0, 217, 255, 0.1);
            position: relative;
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .pricing-card:hover {
            transform: translateY(-10px);
            border-color: var(--primary-color);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
        }
        
        .pricing-card.popular {
            border: 2px solid var(--primary-color);
            transform: scale(1.05);
        }
        
        .pricing-card.popular:hover {
            transform: scale(1.05) translateY(-10px);
        }
        
        .promo-tag, .popular-tag {
            position: absolute;
            top: 15px;
            right: 15px;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
        }
        
        .promo-tag {
            background: linear-gradient(135deg, var(--accent-color), #ff5500);
            color: white;
        }
        
        .popular-tag {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        
        .pricing-header {
            margin-bottom: 30px;
        }
        
        .pricing-name {
            color: var(--text-light);
            font-size: 24px;
            margin-bottom: 10px;
            font-family: 'Orbitron', sans-serif;
        }
        
        .feature-list {
            list-style: none;
            padding-left: 0;
            text-align: left;
        }
        
        .feature-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-dim);
        }
        
        .feature-list i {
            color: var(--primary-color);
            flex-shrink: 0;
            margin-top: 3px;
        }
        
        /* 关键词部分 */
        .keyword-section {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .keyword-section .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .keyword-section .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .keyword-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            justify-content: center;
            margin-top: 30px;
        }
        
        .keyword-tag {
            padding: 10px 25px;
            background: rgba(5, 8, 17, 0.5);
            border-radius: 25px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-light);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid rgba(0, 217, 255, 0.1);
        }
        
        .keyword-tag:hover {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            border-color: transparent;
        }
        
        /* FAQ部分 */
        .faq {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .faq .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .faq .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }
        
        .faq-item {
            margin-bottom: 20px;
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid rgba(0, 217, 255, 0.1);
        }
        
        .faq-question {
            padding: 20px;
            background: rgba(5, 8, 17, 0.5);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-light);
            font-weight: 600;
            font-size: 16px;
        }
        
        .faq-question:hover {
            background: rgba(0, 217, 255, 0.1);
        }
        
        .faq-question i {
            color: var(--primary-color);
            transition: transform 0.3s ease;
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: rgba(5, 8, 17, 0.3);
        }
        
        .faq-answer p {
            padding: 20px 0;
            color: var(--text-dim);
            line-height: 1.7;
        }
        
        /* SEO教程部分 */
        #news {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        #news .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        #news .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .news-list {
            margin-bottom: 30px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .news-list:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }
        
        .news-item {
            background: rgba(5, 8, 17, 0.5);
            border-radius: 10px;
            padding: 20px;
            border: 1px solid rgba(0, 217, 255, 0.1);
            transition: all 0.3s ease;
        }
        
        .news-item:hover {
            border-color: var(--primary-color);
            transform: translateY(-5px);
        }
        
        .news-content h3 {
            margin-bottom: 10px;
        }
        
        .news-title {
            color: var(--text-light);
            font-size: 18px;
            margin-bottom: 10px;
        }
        
        .news-link {
            color: var(--text-light);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .news-link:hover {
            color: var(--primary-color);
        }
        
        .news-excerpt {
            color: var(--text-dim);
            line-height: 1.7;
            margin-bottom: 15px;
        }
        
        .news-date {
            color: var(--text-dim);
            font-size: 14px;
        }
        
        .btn-outline {
            padding: 12px 30px;
            background: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-block;
        }
        
        .btn-outline:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        
        .text-center {
            text-align: center;
        }
        
        /* 友情链接部分 */
        .friend-links {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 50px 40px;
            margin: 40px 0;
            border: 1px solid rgba(0, 217, 255, 0.1);
            backdrop-filter: blur(10px);
        }
        
        .friend-links .section-title {
            color: var(--primary-color);
            font-size: 32px;
            font-family: 'Orbitron', sans-serif;
            margin-bottom: 15px;
            text-align: center;
        }
        
        .friend-links .section-subtitle {
            color: var(--text-dim);
            font-size: 18px;
            text-align: center;
            margin-bottom: 40px;
        }
        
        .friend-links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }
        
        .friend-link-item {
            background: rgba(5, 8, 17, 0.5);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            border: 1px solid rgba(0, 217, 255, 0.1);
            transition: all 0.3s ease;
        }
        
        .friend-link-item:hover {
            transform: translateY(-5px);
            border-color: var(--primary-color);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .friend-link-item a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 500;
            font-size: 16px;
            display: block;
            transition: color 0.3s ease;
        }
        
        .friend-link-item:hover a {
            color: var(--primary-color);
        }
        
        /* 页脚 - 与关于我们页面统一 */
        footer {
            text-align: center;
            padding: 40px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: 60px;
            color: var(--text-dim);
            font-size: 15px;
            position: relative;
        }
        
        footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-section {
            text-align: left;
        }
        
        .footer-section h4 {
            color: var(--primary-color);
            font-size: 18px;
            margin-bottom: 15px;
            font-family: 'Orbitron', sans-serif;
        }
        
        .footer-section p {
            color: var(--text-dim);
            line-height: 1.6;
            margin-bottom: 15px;
        }
        
        .footer-section ul {
            list-style: none;
            padding-left: 0;
        }
        
        .footer-section li {
            margin-bottom: 8px;
            color: var(--text-dim);
        }
        
        .footer-section a {
            color: var(--text-dim);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-section a:hover {
            color: var(--primary-color);
        }
        
        .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        
        .copyright p {
            margin-bottom: 10px;
        }
        
        .copyright a {
            color: var(--text-dim);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .copyright a:hover {
            color: var(--primary-color);
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .pricing-table {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .friend-links-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: rgba(5, 8, 17, 0.98);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 40px;
                gap: 0;
                transition: left 0.3s ease;
                backdrop-filter: blur(10px);
                border-top: 1px solid rgba(0, 217, 255, 0.1);
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-item {
                width: 100%;
                text-align: center;
            }
            
            .nav-link {
                display: block;
                padding: 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                font-size: 18px;
            }
            
            .nav-link:hover {
                background: rgba(0, 217, 255, 0.05);
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            body {
                padding-top: 70px;
            }
            
            .hero-content h1 {
                font-size: 28px;
            }
            
            .hero-content p {
                font-size: 16px;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .hero-features {
                flex-direction: column;
                align-items: center;
                gap: 15px;
            }
            
            .data-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .pricing-table {
                grid-template-columns: 1fr;
            }
            
            .pricing-card.popular {
                transform: none;
            }
            
            .pricing-card.popular:hover {
                transform: translateY(-10px);
            }
            
            .friend-links-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .timeline-item {
                flex-direction: column;
            }
            
            .timeline-date {
                margin-bottom: 10px;
            }
            
            .timeline-content {
                padding-left: 20px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .section-subtitle {
                font-size: 16px;
            }
            
            .tech-card, .service-card, .feature-card {
                padding: 20px;
            }
            
            .technical-explanation, .comparison-section, .core-services, 
            .case-studies, .pricing, .keyword-section, .faq, #news, .friend-links {
                padding: 30px 20px;
                margin: 30px 0;
            }
        }
        
        @media (max-width: 480px) {
            .data-stats {
                grid-template-columns: 1fr;
            }
            
            .friend-links-grid {
                grid-template-columns: 1fr;
            }
            
            .keyword-cloud {
                gap: 10px;
            }
            
            .keyword-tag {
                padding: 8px 15px;
                font-size: 14px;
            }
            
            .data-number {
                font-size: 28px;
            }
            
            .feature-icon {
                width: 50px;
                height: 50px;
                font-size: 24px;
            }
        }