:root {
            --primary: #ff6b35;
            --primary-dark: #e55a2b;
            --primary-light: #ff8c5a;
            --secondary: #2c3e50;
            --accent: #3498db;
            --accent2: #9b59b6;
            --light: #f8f9fa;
            --white: #ffffff;
            --gray: #6c757d;
            --dark-gray: #4a5568;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            color: var(--dark-gray);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark), var(--accent2));
            color: var(--white);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        }
        
        header::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }
        
        header::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }
        
        .header-content {
            position: relative;
            z-index: 1;
        }
        
        header h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 800;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        
        header p {
            font-size: 1.4rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.95;
        }
        
        .btn {
            display: inline-block;
            background-color: var(--white);
            color: var(--primary);
            padding: 14px 32px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            transition: all 0.3s;
            box-shadow: 0 6px 20px rgba(0,0,0,0.2);
            margin: 0 10px;
        }
        
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.25);
        }
        
        .btn-outline {
            background-color: transparent;
            color: var(--white);
            border: 3px solid var(--white);
        }
        
        /* 特性区域 */
        .features {
            padding: 5rem 0;
        }
        .features table {line-height:30px;width:100%;margin: 1rem 0;}
        .features table tr td{padding:0 1%}
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            font-size: 2.5rem;
            color: var(--secondary);
            position: relative;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 5px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            border-radius: 5px;
        }
        
        .section-subtitle {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 4rem;
            color: var(--gray);
            font-size: 1.2rem;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
        }
        
        .feature-card {
            background: var(--white);
            padding: 2.5rem 2rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            text-align: center;
            transition: all 0.4s;
            border: 1px solid rgba(0,0,0,0.05);
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: linear-gradient(to right, var(--primary), var(--accent), var(--accent2));
        }
        
        .feature-card:hover {
            transform: translateY(-12px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }
        
        .feature-icon {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        
        .feature-card h3 {
            margin-bottom: 1rem;
            color: var(--secondary);
            font-size: 1.5rem;
        }
        
        .feature-card p {
            color: var(--gray);
        }
        
        /* 下载区域 */
        .downloads {
            padding: 5rem 0;
            background: linear-gradient(135deg, var(--accent), var(--accent2));
            color: var(--white);
        }
        
        .download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        
        .download-card {
            background: rgb(255 255 255);
            padding: 2.5rem 2rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            text-align: center;
            transition: all 0.4s;
            color: var(--dark-gray);
        }
        
        .download-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.2);
            background: var(--white);
        }
        
        .platform-icon {
            font-size: 4.5rem;
            margin-bottom: 1.5rem;
        }
        
        .android { color: #3ddc84; }
        .ios { color: #007aff; }
        .windows { color: #0078d7; }
        .mac { color: #555; }
        
        .version {
            color: var(--gray);
            margin-bottom: 1rem;
            font-size: 0.9rem;
        }
        
        .file-size {
            color: var(--gray);
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }
        
        /* 使用指南 */
        .guide {
            padding: 5rem 0;
            background: linear-gradient(to bottom, #f8f9fa, #e9ecef);
        }
        
        .steps {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            margin-top: 3rem;
        }
        
        .step {
            flex: 1;
            min-width: 250px;
            text-align: center;
            padding: 0 1.5rem;
            margin-bottom: 2rem;
            position: relative;
        }
        
        .step:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 25px;
            right: 0;
            width: 50%;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent));
        }
        
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 1.5rem;
            box-shadow: 0 4px 10px rgba(255, 107, 53, 0.3);
        }
        
        .step h3 {
            margin-bottom: 1rem;
            color: var(--secondary);
            font-size: 1.3rem;
        }
        
        .step p {
            color: var(--gray);
        }
        .daohang{max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;}
        .daohang_text{margin: 1rem 0;}
        .daohang_text a {text-decoration:none;color:#000;border-bottom: 1px dashed #b9b9b9;}
        /* 常见问题 */
        .faq {
            padding: 5rem 0;
        }
        
        .faq-item {
            margin-bottom: 2rem;
            border-bottom: 2px solid #e2e8f0;
            padding-bottom: 1.5rem;
        }
        
        .faq-question {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--secondary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: color 0.3s;
            padding: 10px 0;
        }
        .faq-question a {text-decoration:none;color: #3e3e3e;}
        .faq-question:hover {
            color: var(--primary);
        }
        
        .faq-answer {
            color: var(--gray);
            line-height: 1.8;
            display: none;
            font-size: 1.1rem;
            padding-left: 10px;
        }
        
        .faq-answer.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        /* 页脚 */
        footer {
            background: linear-gradient(135deg, var(--secondary), #1a2530);
            color: var(--white);
            padding: 4rem 0 2rem;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2.5rem;
            margin-bottom: 3rem;
        }
        
        .footer-section h3 {
            margin-bottom: 1.5rem;
            color: var(--white);
            font-size: 1.3rem;
            position: relative;
        }
        
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section ul li {
            margin-bottom: 0.8rem;
        }
        
        .footer-section a {
            color: #b0b7c3;
            text-decoration: none;
            transition: all 0.3s;
            font-size: 1rem;
        }
        
        .footer-section a:hover {
            color: var(--white);
            padding-left: 5px;
        }
        
        .footer-section p {
            color: #b0b7c3;
            line-height: 1.8;
            font-size: 1rem;
        }
        
        .social-links {
            display: flex;
            margin-top: 1.5rem;
        }
        
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 50%;
            margin-right: 10px;
            transition: all 0.3s;
        }
        
        .social-links a:hover {
            background-color: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #8a94a6;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            header h1 {
                font-size: 2.3rem;
            }
            
            header p {
                font-size: 1.1rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .steps {
                flex-direction: column;
            }
            
            .step {
                margin-bottom: 2.5rem;
            }
            
            .step:not(:last-child)::after {
                display: none;
            }
            
            .btn {
                display: block;
                margin: 10px auto;
                width: 80%;
                max-width: 300px;
            }
        }





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