:root {
            --primary: #2563EB; /* 科技蓝主色调 */
            --secondary: #3B82F6; /* 科技蓝辅助色 */
            --accent: #059669; /* 绿色强调色（开源特色） */
            --light: #F8FAFC; /* 浅色背景 */
            --gray: #64748B; /* 灰色文字 */
            --dark: #1E293B; /* 深色背景 */
            --shadow: 0 4px 6px rgba(0,0,0,0.1);
            --radius: 8px;
            --tech-bg: #EFF6FF; /* 科技风格背景 */
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "Segoe UI", "Consolas", "Monaco", monospace;
        }
        
        body {
            background: linear-gradient(135deg, var(--light) 0%, var(--tech-bg) 100%);
            color: var(--dark);
            line-height: 1.6;
        }
        
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 导航栏 */
        header {
            background: white;
            box-shadow: var(--shadow);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--primary);
            text-decoration: none;
        }
        
        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 14px;
        }
        
        .nav-links {
            display: flex;
            gap: 30px;
        }
        
        .nav-links a {
            color: var(--gray);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            position: relative;
        }
        
        .nav-links a:hover, 
        .nav-links a.active {
            color: var(--primary);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s;
        }
        
        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }
        
        .download-btn {
            background: var(--primary);
            color: white;
            padding: 8px 20px;
            border-radius: var(--radius);
            text-decoration: none;
            font-weight: 500;
            transition: background 0.3s;
        }
        
        .download-btn:hover {
            background: #1D4ED8;
        }
        
        /* 英雄区域 */
        .hero {
            padding: 100px 0 60px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
        }
        
        .hero h1 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto 30px;
        }
        
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }
        
        .btn {
            padding: 12px 30px;
            border-radius: var(--radius);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .btn-primary {
            background: var(--accent);
            color: white;
        }
        
        .btn-primary:hover {
            background: #047857;
            transform: translateY(-2px);
        }
        
        .btn-outline {
            border: 2px solid white;
            color: white;
        }
        
        .btn-outline:hover {
            background: white;
            color: var(--primary);
        }
        
        /* 功能区 */
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--secondary);
        }
        
        .section-title p {
            color: var(--gray);
            max-width: 600px;
            margin: 20px auto 0;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background: white;
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 1.8rem;
            font-weight: bold;
        }
        
        .feature-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--primary);
        }
        
        /* 下载区 */
        .download-section {
            background: var(--tech-bg);
        }
        
        .download-card {
            background: white;
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        
        .download-card h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        
        .download-card p {
            color: var(--gray);
            margin-bottom: 30px;
        }
        
        .download-options {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }
        
        .storage-option {
            background: #F1F5F9;
            border-radius: var(--radius);
            padding: 20px;
            display: flex;
            align-items: center;
            gap: 15px;
            text-decoration: none;
            color: var(--dark);
            transition: all 0.3s;
            border: 2px solid transparent;
        }
        
        .storage-option:hover {
            background: #E2E8F0;
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        
        .storage-icon {
            width: 50px;
            height: 50px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            font-weight: bold;
        }
        
        .baidu-icon {
            background: #2932E1;
        }
        
        .quark-icon {
            background: #5C6BC0;
        }
        
        .storage-info h4 {
            font-size: 1.2rem;
            margin-bottom: 5px;
        }
        
        .storage-info p {
            font-size: 0.9rem;
            color: var(--gray);
            margin: 0;
        }
        
        .version-info {
            background: #F1F5F9;
            border-radius: var(--radius);
            padding: 20px;
            text-align: left;
        }
        
        .version-info h4 {
            margin-bottom: 15px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .version-info ul {
            list-style: none;
        }
        
        .version-info li {
            padding: 8px 0;
            border-bottom: 1px dashed #CBD5E1;
            display: flex;
            justify-content: space-between;
        }
        
        .version-info li:last-child {
            border-bottom: none;
        }
        
        /* 教程区 */
        .tutorial-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .tutorial-step {
            background: white;
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
            position: relative;
        }
        
        .step-number {
            position: absolute;
            top: -15px;
            left: 30px;
            width: 30px;
            height: 30px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        .tutorial-step h3 {
            margin: 20px 0 15px;
            color: var(--primary);
        }
        
        .code-block {
            background: var(--tech-bg);
            color: var(--dark);
            padding: 15px;
            border-radius: var(--radius);
            font-family: "Consolas", "Monaco", monospace;
            font-size: 0.9rem;
            margin: 15px 0;
            overflow-x: auto;
            border-left: 4px solid var(--primary);
        }
        
        /* 常见问题 */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            margin-bottom: 15px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            background: white;
        }
        
        .faq-question {
            padding: 20px;
            background: white;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 500;
            color: var(--dark);
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s;
            background: #F8FAFC;
            color: var(--gray);
        }
        
        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 500px;
        }
        
        .faq-toggle {
            transition: transform 0.3s;
            color: var(--primary);
            font-weight: bold;
        }
        
        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
        }
        
        /* 页脚 */
        footer {
            background: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-column h3 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--secondary);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #94A3B8;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #334155;
            color: #64748B;
            font-size: 0.9rem;
        }
        
        /* 响应式 */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .hero h1 {
                font-size: 2rem;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .download-card {
                padding: 30px 20px;
            }
            
            .btn {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
        }