* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        :root {
            --primary: #2c69a0;
            --secondary: #70c5c3;
            --primary-light: rgba(44, 105, 160, 0.1);
            --secondary-light: rgba(112, 197, 195, 0.1);
            --accent: #4da3c7;
            --dark: #1a3a5c;
            --light: #f0f7fa;
            --warning: #fff3cd;
            --success: #d4edda;
            --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e7ec 100%);
            color: #333;
            line-height: 1.6;
            padding-top: 70px;
        }
        
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            padding: 15px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 5%;
        }
        
        .logo-container {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .logo {
            font-size: 28px;
            font-weight: 700;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 10px;
            color: var(--secondary);
        }
        
        .nav-links {
            display: flex;
            gap: 25px;
        }
        
        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            font-size: 16px;
            transition: all 0.3s ease;
            padding: 8px 15px;
            border-radius: 20px;
        }
        
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        
        .container {
            max-width: 1200px;
            margin: 30px auto;
            padding: 0 20px;
        }
        
        .hero {
            background: linear-gradient(120deg, rgba(255,255,255,0.9) 0%, rgba(245,245,255,0.9) 100%);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: var(--card-shadow);
            text-align: center;
            border: 1px solid rgba(255,255,255,0.6);
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            color: var(--dark);
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 30px;
            color: #555;
        }
        
        .hero-image {
            max-width: 100%;
            border-radius: 15px;
            margin-top: 25px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(0,0,0,0.05);
        }
        
        .section {
            background: white;
            border-radius: 18px;
            padding: 35px;
            margin-bottom: 35px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.05);
        }
        
        .section-title {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 25px;
            color: var(--dark);
            font-size: 1.8rem;
        }
        
        .section-title i {
            color: var(--primary);
            background: rgba(44, 105, 160, 0.15);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .warning {
            background-color: var(--warning);
            border-left: 5px solid #ffc107;
            padding: 20px;
            margin: 25px 0;
            border-radius: 8px;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }
        
        .feature-card {
            background: linear-gradient(135deg, var(--light) 0%, #e6f2f8 100%);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
        }
        
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        }
        
        .feature-card i {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--secondary);
        }
        
        .feature-card h3 {
            margin-bottom: 15px;
            color: var(--dark);
        }

        /* 下载页面样式 */
        .versions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }

        .version-card {
            background: linear-gradient(135deg, var(--light) 0%, #e6f2f8 100%);
            border-radius: 15px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
            position: relative;
            overflow: hidden;
        }

        .version-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        }

        .version-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .version-header h3 {
            font-size: 1.5rem;
            color: var(--primary);
            margin: 0;
        }

        .version-tag {
            background: var(--secondary);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .version-tag.old-version {
            background: #999;
        }

        .release-date {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .version-features {
            margin-bottom: 25px;
        }

        .version-features h4 {
            margin-bottom: 12px;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .version-features ul {
            padding-left: 20px;
            color: #555;
        }

        .version-features li {
            margin-bottom: 8px;
        }

        .version-download {
            text-align: center;
            margin-top: 20px;
        }

        .system-support {
            margin-top: 12px;
            font-size: 0.85rem;
            color: #333;
        }
        
        .system-support a {
            color: #333;
            text-decoration: underline;
        }

        .nav-links a.active {
            background: rgba(255, 255, 255, 0.25);
            font-weight: 600;
        }
        
        .update-highlight {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
            border-radius: 15px;
            padding: 25px;
            margin: 25px 0;
            border-left: 4px solid var(--secondary);
        }
        
        .footer {
            background: var(--dark);
            color: white;
            text-align: center;
            padding: 30px 0;
            margin-top: 50px;
            border-top: 5px solid var(--primary);
        }
        
        .footer-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 25px;
            margin: 20px 0;
        }
        
        .footer-links a {
            color: white;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .footer-links a:hover {
            color: var(--accent);
        }
        
        .copyright {
            margin-top: 20px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        
        .btn {
            display: inline-block;
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            padding: 14px 35px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(44, 105, 160, 0.3);
            margin: 10px 5px;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(44, 105, 160, 0.4);
        }
        
        .btn-outline {
            background: transparent;
            border: 2px solid #333;
            color: #333;
            box-shadow: none;
        }
        
        .btn-outline:hover {
            background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
        }
        
        .legal-notice {
            background: rgba(255, 255, 255, 0.9);
            border-radius: 15px;
            padding: 25px;
            margin: 30px 0;
            border: 2px dashed var(--secondary);
        }
        
        .legal-notice h3 {
            color: var(--primary);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .tech-specs {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 25px;
        }
        
        .spec-card {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
            border-radius: 12px;
            padding: 20px;
            border: 1px solid rgba(112, 197, 195, 0.2);
        }
        
        .spec-card h4 {
            color: var(--secondary);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        @media (max-width: 768px) {
            .header {
                flex-direction: column;
                padding: 15px;
            }
            
            .nav-links {
                margin-top: 15px;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
        }