@font-face {
            font-family: 'Material Icons';
            font-style: normal;
            font-weight: 400;
            src: url(../font/materialicons.woff2) format('woff2');
        }
        
        .material-icons {
            font-family: 'Material Icons';
            font-weight: normal;
            font-style: normal;
            font-size: 24px;
            line-height: 1;
            letter-spacing: normal;
            text-transform: none;
            display: inline-block;
            white-space: nowrap;
            word-wrap: normal;
            direction: ltr;
            -webkit-font-smoothing: antialiased;
        }
        
        :root {
            --primary-color: #6366f1;
            --primary-dark: #4f46e5;
            --secondary-color: #10b981;
            --dark-bg: #0f172a;
            --darker-bg: #020617;
            --light-bg: #f8fafc;
            --text-light: #f1f5f9;
            --text-dark: #1e293b;
            --glass-bg: rgba(255, 255, 255, 0.08);
            --glass-border: rgba(255, 255, 255, 0.1);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            --section-padding: 100px 0;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: var(--text-light);
            background-color: var(--darker-bg);
            overflow-x: hidden;
            transition: var(--transition);
        }
        
        body.light-mode {
            background-color: var(--light-bg);
            color: var(--text-dark);
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            padding: 25px 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            background-color: rgba(15, 23, 42, 0.9);
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }
        
        body.light-mode header {
            background-color: rgba(248, 250, 252, 0.9);
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
        }
        
        .logo .material-icons {
            margin-right: 10px;
            font-size: 2.2rem;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            color: var(--text-light);
            text-decoration: none;
            font-weight: 500;
            font-size: 1.05rem;
            transition: var(--transition);
            position: relative;
            padding: 5px 0;
        }
        
        body.light-mode .nav-links a {
            color: var(--text-dark);
        }
        
        .nav-links a:hover {
            color: var(--primary-color);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        /* 按钮容器横向排列 */
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .theme-toggle, .mobile-toggle {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            color: var(--text-light);
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.2rem;
        }
        
        /* 统一主题切换时的按钮颜色 */
        body.light-mode .theme-toggle,
        body.light-mode .mobile-toggle {
            background: rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.1);
            color: var(--text-dark);
        }
        
        .theme-toggle:hover, .mobile-toggle:hover {
            background: var(--primary-color);
            transform: translateY(-2px);
            color: white;
        }
        
        .mobile-toggle {
            display: none;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 180px 0 120px;
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            max-width: 800px;
            position: relative;
            z-index: 2;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 25px;
            background: linear-gradient(90deg, #fff 0%, var(--primary-color) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        body.light-mode .hero h1 {
            background: linear-gradient(90deg, var(--darker-bg) 0%, var(--primary-dark) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 40px;
            color: #cbd5e1;
            max-width: 600px;
        }
        
        body.light-mode .hero p {
            color: #475569;
        }
        
        .cta-button {
            display: inline-block;
            background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 16px 36px;
            margin-top: 0.8rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow);
        }
        
        .cta-button:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(99, 102, 241, 0.3);
        }
        
        /* 服务区域 */
        .services {
            padding: var(--section-padding);
            background-color: rgba(15, 23, 42, 0.5);
        }
        
        body.light-mode .services {
            background-color: rgba(241, 245, 249, 0.5);
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 20px;
        }
        
        .section-subtitle {
            text-align: center;
            color: #94a3b8;
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 60px;
        }
        
        body.light-mode .section-subtitle {
            color: #64748b;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .service-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 40px 30px;
            transition: var(--transition);
            backdrop-filter: blur(10px);
        }
        
        .service-card:hover {
            transform: translateY(-15px);
            border-color: var(--primary-color);
            box-shadow: var(--shadow);
        }
        
        .service-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            font-size: 1.8rem;
            color: white;
        }
        
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }
        
        .service-card p {
            color: #cbd5e1;
            margin-bottom: 20px;
        }
        
        body.light-mode .service-card p {
            color: #475569;
        }
        
        /* 优势区域 */
        .advantages {
            padding: var(--section-padding);
        }
        
        .advantages-content {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 80px;
        }
        
        .advantages-content.reverse {
            flex-direction: row-reverse;
        }
        
        .advantages-text {
            flex: 1;
        }
        
        .advantages-image {
            flex: 1;
            height: 400px;
            border-radius: 20px;
            overflow: hidden;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            position: relative;
        }
        
        .advantages-image::before {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1));
        }
        
        .advantages h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
        }
        
        /* 流程区域 */
        .process {
            padding: var(--section-padding);
            background-color: rgba(15, 23, 42, 0.5);
        }
        
        body.light-mode .process {
            background-color: rgba(241, 245, 249, 0.5);
        }
        
        .process-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 60px;
        }
        
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            z-index: 1;
        }
        
        .step {
            text-align: center;
            position: relative;
            z-index: 2;
            flex: 1;
            max-width: 200px;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            background: var(--darker-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 800;
            margin: 0 auto 25px;
            color: var(--primary-color);
            border: 5px solid var(--primary-color);
        }
        
        body.light-mode .step-number {
            background: var(--light-bg);
        }
        
        /* 页脚 */
        footer {
            background-color: var(--dark-bg);
            padding: 80px 0 30px;
        }
        
        body.light-mode footer {
            background-color: #e2e8f0;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 50px;
            margin-bottom: 50px;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            color: white;
        }
        
        body.light-mode .footer-column h3 {
            color: var(--darker-bg);
        }
        
        .footer-column p {
            color: #94a3b8;
            margin-bottom: 20px;
        }
        
        body.light-mode .footer-column p {
            color: #64748b;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
        }
        
        body.light-mode .footer-links a {
            color: #64748b;
        }
        
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        
        .social-icons {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-icons a {
            width: 45px;
            height: 45px;
            background: var(--glass-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: var(--transition);
        }
        
        body.light-mode .social-icons a {
            color: var(--text-dark);
        }
        
        .social-icons a:hover {
            background: var(--primary-color);
            transform: translateY(-5px);
        }
        
        /* 新增备案信息区域 */
        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 20px;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        body.light-mode .footer-legal {
            border-top: 1px solid rgba(0, 0, 0, 0.1);
        }
        
        .beian-link {
            display: inline-flex;
            align-items: center;
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 4px;
        }
        
        body.light-mode .beian-link {
            color: #64748b;
        }
        
        .beian-link:hover {
            color: var(--primary-color);
            background-color: rgba(99, 102, 241, 0.1);
        }
        
        .beian-link .material-icons {
            font-size: 1rem;
            margin-right: 5px;
        }
        
        .beian-img {
            height: 16px;
            margin-right: 5px;
            vertical-align: middle;
        }
        
        .copyright {
            text-align: center;
            color: #94a3b8;
            font-size: 0.9rem;
            margin-top: 15px;
        }
        
        body.light-mode .copyright {
            color: #64748b;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            
            .advantages-content {
                flex-direction: column;
            }
            
            .advantages-content.reverse {
                flex-direction: column;
            }
            
            .advantages-image {
                width: 100%;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 90px;
                left: 0;
                width: 100%;
                background-color: var(--dark-bg);
                flex-direction: column;
                align-items: center;
                padding: 30px 0;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
                z-index: 999;
            }
            
            body.light-mode .nav-links {
                background-color: var(--light-bg);
            }
            
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            
            .nav-links li {
                margin: 15px 0;
            }
            
            /* 移动端显示菜单按钮 */
            .mobile-toggle {
                display: flex;
            }
            
            /* 确保移动端按钮横向排列 */
            .header-actions {
                flex-direction: row;
                gap: 10px;
            }
            
            .hero {
                padding: 150px 0 80px;
            }
            
            .hero h1 {
                font-size: 2.3rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .process-steps {
                flex-direction: column;
                align-items: center;
                gap: 50px;
            }
            
            .process-steps::before {
                display: none;
            }
            
            /* 移动端备案信息调整 */
            .footer-legal {
                flex-direction: column;
                gap: 15px;
            }
        }
        
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .cta-button {
                padding: 14px 30px;
                font-size: 1rem;
            }
            
            .service-card {
                padding: 30px 20px;
            }
            
            /* 移动端小屏幕按钮间距调整 */
            .header-actions {
                gap: 8px;
            }
            
            .theme-toggle, .mobile-toggle {
                width: 42px;
                height: 42px;
                font-size: 1.1rem;
            }
        }
        
        @media (max-width: 400px) {
            /* 超小屏幕进一步调整 */
            .header-actions {
                gap: 6px;
            }
            
            .theme-toggle, .mobile-toggle {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
            
            .logo {
                font-size: 1.5rem;
            }
            
            .logo .material-icons {
                font-size: 1.8rem;
            }
        }