* { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
            line-height: 1.6; 
            overflow-x: hidden;
        }
        
        /* 页面加载动画 */
        .page-loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            transition: opacity 0.5s ease-out;
        }
        
        .loader {
            width: 50px;
            height: 50px;
            border: 3px solid rgba(255,255,255,0.3);
            border-top: 3px solid white;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        /* 滚动进度条 */
        .scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: linear-gradient(90deg, #f7931a, #ff9500);
            z-index: 1001;
            transition: width 0.3s ease;
        }
        
        /* 浮动粒子背景 */
        .particles {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            pointer-events: none;
        }
        
        .particle {
            position: absolute;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            animation: float 6s ease-in-out infinite;
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }
        
        .navbar {
            background: rgba(255,255,255,0.95);
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
            backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        
        .navbar.scrolled {
            background: rgba(255,255,255,0.98);
            padding: 0.5rem 0;
            box-shadow: 0 4px 30px rgba(0,0,0,0.15);
        }
        
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2rem;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #f7931a;
            text-decoration: none;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }
        
        .nav-links a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            position: relative;
            transition: color 0.3s ease;
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 50%;
            background: linear-gradient(45deg, #f7931a, #ff9500);
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        .nav-links a:hover {
            color: #f7931a;
        }
        
        .btn {
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 25px;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.3s ease;
            transform: translateY(0);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
        }
        
        .btn-primary {
            background: linear-gradient(45deg, #f7931a, #ff9500);
            color: white;
            position: relative;
            overflow: hidden;
        }
        
        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s ease;
        }
        
        .btn-primary:hover::before {
            left: 100%;
        }
        
        .btn-secondary {
            background: transparent;
            color: #f7931a;
            border: 2px solid #f7931a;
        }
        
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            padding: 2rem;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)" /></svg>');
            animation: backgroundMove 20s linear infinite;
        }
        
        @keyframes backgroundMove {
            0% { transform: translateX(0) translateY(0); }
            100% { transform: translateX(-10px) translateY(-10px); }
        }
        
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            animation: fadeInUp 1s ease-out 0.5s both;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        
        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            animation: fadeInUp 1s ease-out 0.7s both;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
        }
        
        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            animation: fadeInUp 1s ease-out 0.9s both;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .features {
            padding: 5rem 2rem;
            background: white;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            text-align: center;
            transition: all 0.3s ease;
            transform: translateY(0);
            opacity: 0;
            animation: slideInUp 0.6s ease-out forwards;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.15);
        }
        
        .feature-card:nth-child(1) { animation-delay: 0.1s; }
        .feature-card:nth-child(2) { animation-delay: 0.2s; }
        .feature-card:nth-child(3) { animation-delay: 0.3s; }
        .feature-card:nth-child(4) { animation-delay: 0.4s; }
        .feature-card:nth-child(5) { animation-delay: 0.5s; }
        .feature-card:nth-child(6) { animation-delay: 0.6s; }
        
        @keyframes slideInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .feature-icon {
            font-size: 3rem;
            color: #f7931a;
            margin-bottom: 1rem;
            transition: transform 0.3s ease;
        }
        
        .feature-card:hover .feature-icon {
            transform: scale(1.1) rotateY(360deg);
        }
        
        .download-section {
            padding: 5rem 2rem;
            background: linear-gradient(135deg, #f7931a 0%, #ff9500 100%);
            color: white;
            text-align: center;
        }
        
        .download-btn {
            background: white;
            color: #f7931a;
            padding: 1rem 2rem;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            margin: 0 0.5rem;
            transition: all 0.3s ease;
            transform: translateY(0);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }
        
        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
            background: #f8f9fa;
        }
        
        .versions {
            padding: 5rem 2rem;
            background: #f8f9fa;
        }
        
        .versions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }
        
        .version-card {
            background: white;
            padding: 2rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            text-align: center;
            transition: all 0.3s ease;
            transform: translateY(0);
            position: relative;
            overflow: hidden;
        }
        
        .version-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(247,147,26,0.1), transparent);
            transition: left 0.6s ease;
        }
        
        .version-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        
        .version-card:hover::before {
            left: 100%;
        }
        
        .version-price {
            font-size: 3rem;
            font-weight: bold;
            color: #f7931a;
            margin: 1rem 0;
        }
        
        .footer {
            background: #333;
            color: white;
            padding: 3rem 2rem;
        }
        
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        
        .footer-section h4 {
            color: #f7931a;
            margin-bottom: 1rem;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section ul li {
            margin-bottom: 0.5rem;
        }
        
        .footer-section ul li a {
            color: #ccc;
            text-decoration: none;
        }
        
        /* 弹窗样式 */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0,0,0,0.5);
        }
        
        .modal-content {
            background-color: #fefefe;
            margin: 5% auto;
            padding: 20px;
            border: none;
            border-radius: 15px;
            width: 90%;
            max-width: 800px;
            max-height: 80vh;
            overflow-y: auto;
            position: relative;
        }
        
        .close {
            color: #aaa;
            float: right;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            position: absolute;
            right: 20px;
            top: 10px;
        }
        
        .close:hover,
        .close:focus {
            color: #000;
            text-decoration: none;
        }
        
        /* 返回顶部按钮 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: linear-gradient(45deg, #f7931a, #ff9500);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            font-size: 1.2rem;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            transform: translateY(100px);
            opacity: 0;
            z-index: 1000;
        }
        
        .back-to-top.visible {
            transform: translateY(0);
            opacity: 1;
        }
        
        .back-to-top:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        }
        
        /* 新增的视觉效果 */
        .glow {
            animation: glow 2s ease-in-out infinite alternate;
        }
        
        @keyframes glow {
            from { box-shadow: 0 0 10px rgba(247,147,26,0.5); }
            to { box-shadow: 0 0 20px rgba(247,147,26,0.8), 0 0 30px rgba(247,147,26,0.6); }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hero h1 { font-size: 2.5rem; }
            .hero-buttons { flex-direction: column; }
            .modal-content {
                width: 95%;
                margin: 10% auto;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 45px;
                height: 45px;
            }
            .particles { display: none; }
        }