:root {
            --primary-blue: rgb(37, 99, 235);
            --primary-blue-dark: rgb(30, 80, 200);
            --light-blue: rgb(230, 240, 255);
            --text-dark: rgb(33, 37, 41);
            --text-light: rgb(108, 117, 125);
            --bg-white: rgb(255, 255, 255);
            --bg-light: rgb(248, 249, 250);
            --bg-dark: rgb(33, 37, 41);
            --border-color: rgb(222, 226, 230);
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --radius: 8px;
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Noto Sans SC', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background-color: var(--bg-white);
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部导航 */
        header {
            background-color: var(--bg-white);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }
        
        .logo-icon {
            width: 40px;
            height: 40px;
            background-color: var(--primary-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 20px;
            font-weight: bold;
        }
        
        .logo-text {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
        }
        
        .logo-text span {
            color: var(--primary-blue);
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }
        
        .nav-menu a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        
        .nav-menu a:hover {
            color: var(--primary-blue);
        }
        
        .nav-menu a.active {
            color: var(--primary-blue);
        }
        
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary-blue);
        }
        
        .nav-buttons {
            display: flex;
            gap: 15px;
        }
        
        .btn {
            padding: 10px 22px;
            border-radius: var(--radius);
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            font-size: 16px;
        }
        
        .btn-primary {
            background-color: var(--primary-blue);
            color: white;
        }
        
        .btn-primary:hover {
            background-color: var(--primary-blue-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        
        .btn-outline {
            background-color: transparent;
            color: var(--primary-blue);
            border: 1px solid var(--primary-blue);
        }
        
        .btn-outline:hover {
            background-color: var(--light-blue);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-dark);
            cursor: pointer;
        }
        
        /* 首页英雄区域 */
        .hero {
            padding: 100px 0;
            background: linear-gradient(135deg, #f5f9ff 0%, #e8f1ff 100%);
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        
        .hero-text {
            flex: 1;
        }
        
        .hero-text h1 {
            font-size: 48px;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text-dark);
        }
        
        .hero-text h1 span {
            color: var(--primary-blue);
        }
        
        .hero-text p {
            font-size: 18px;
            color: var(--text-light);
            margin-bottom: 30px;
        }
        
        .hero-buttons {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        
        .hero-image {
            flex: 1;
            position: relative;
        }
        
        .app-window {
            background-color: white;
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            transform: perspective(1000px) rotateY(-10deg);
            transition: var(--transition);
        }
        
        .app-window:hover {
            transform: perspective(1000px) rotateY(-5deg);
        }
        
        .window-header {
            background-color: var(--bg-light);
            padding: 15px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid var(--border-color);
        }
        
        .window-buttons {
            display: flex;
            gap: 8px;
        }
        
        .window-btn {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }
        
        .window-btn.red {
            background-color: #ff5f57;
        }
        
        .window-btn.yellow {
            background-color: #ffbd2e;
        }
        
        .window-btn.green {
            background-color: #28ca42;
        }
        
        .window-title {
            flex: 1;
            text-align: center;
            font-weight: 500;
            color: var(--text-light);
        }
        
        .window-content {
            padding: 30px;
            height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
        }
        
        .pdf-icon {
            font-size: 80px;
            color: var(--primary-blue);
            margin-bottom: 20px;
        }
        
        .window-content p {
            color: var(--text-light);
            font-size: 18px;
            text-align: center;
        }
        
        /* 功能展示区域 */
        .features {
            padding: 100px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: var(--text-dark);
            margin-bottom: 15px;
        }
        
        .section-title p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background-color: var(--bg-white);
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            background-color: var(--light-blue);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary-blue);
            font-size: 24px;
        }
        
        .feature-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: var(--text-dark);
        }
        
        .feature-card p {
            color: var(--text-light);
            margin-bottom: 20px;
        }
        
        /* 新增软件定制特色区域 */
        .customization-section {
            padding: 80px 0;
            background-color: var(--bg-light);
        }
        
        .customization-content {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        
        .customization-text {
            flex: 1;
        }
        
        .customization-image {
            flex: 1;
        }
        
        .customization-image img {
            max-width: 100%;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        
        /* 下载区域 */
        .download-section {
            text-align: center;
            padding: 80px 0;
            background: linear-gradient(135deg, #f5f9ff 0%, #e8f1ff 100%);
        }
        
        .download-options {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 40px;
        }
        
        .download-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 15px 30px;
            background-color: var(--bg-white);
            border-radius: var(--radius);
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            box-shadow: var(--shadow);
            transition: var(--transition);
            min-width: 200px;
            justify-content: center;
        }
        
        .download-btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            background-color: var(--primary-blue);
            color: white;
        }
        
        .download-btn i {
            font-size: 24px;
        }
        
        .version-info {
            margin-top: 30px;
            color: var(--text-light);
            font-size: 14px;
        }
        
        /* 页脚 */
        footer {
            background-color: var(--bg-dark);
            color: white;
            padding: 70px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
        }
        
        .footer-logo .logo-icon {
            width: 40px;
            height: 40px;
        }
        
        .footer-logo .logo-text {
            color: white;
            font-size: 24px;
        }
        
        .footer-about p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        
        .footer-links h4 {
            font-size: 18px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;

        }
        
        .footer-links h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--primary-blue);
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .footer-contact p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .footer-contact i {
            color: var(--primary-blue);
            width: 20px;
        }
        
        .footer-bottom {
            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: 14px;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            transition: var(--transition);
        }
        
        .social-links a:hover {
            background-color: var(--primary-blue);
            transform: translateY(-3px);
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            
            .hero-text h1 {
                font-size: 40px;
            }
            
            .app-window {
                transform: none;
                max-width: 600px;
                margin: 0 auto;
            }
            
            .app-window:hover {
                transform: translateY(-5px);
            }
            
            .customization-content {
                flex-direction: column;
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                z-index: 999;
            }
            
            .nav-menu.active {
                display: flex;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero {
                padding: 70px 0;
            }
            
            .hero-text h1 {
                font-size: 32px;
            }
            
            .section-title h2 {
                font-size: 30px;
            }
            
            .features, .hero, .customization-section {
                padding: 70px 0;
            }
        }
        
        /* SEO优化样式 */
        .seo-keyword-link {
            color: var(--primary-blue);
            font-weight: 500;
            text-decoration: none;
            border-bottom: 1px dotted var(--primary-blue);
            transition: var(--transition);
        }
        
        .seo-keyword-link:hover {
            border-bottom: 1px solid var(--primary-blue);
            color: var(--primary-blue-dark);
        }
        
        .highlight-box {
            background-color: var(--light-blue);
            border-left: 4px solid var(--primary-blue);
            padding: 20px;
            margin: 30px 0;
            border-radius: 0 var(--radius) var(--radius) 0;
        }
        
        .highlight-box h3 {
            color: var(--primary-blue);
            margin-bottom: 10px;
        }