/* 基础重置与变量 - 蓝色主题 */
        :root {
            --primary-color: #2196F3;
            --primary-dark: #1976D2;
            --primary-light: #64B5F6;
            --secondary-color: #03A9F4;
            --accent-color: #2979FF;
            --success-color: #4CAF50;
            --dark-bg: #0A1929;
            --dark-secondary: #132F4C;
            --card-bg: rgba(19, 47, 76, 0.85);
            --light-text: #E3F2FD;
            --gray-text: #90A4AE;
            --border-color: rgba(33, 150, 243, 0.3);
            --shadow: 0 10px 30px rgba(33, 150, 243, 0.15);
            --shadow-strong: 0 15px 35px rgba(33, 150, 243, 0.25);
            --radius: 16px;
            --radius-lg: 24px;
            --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --gradient-primary: linear-gradient(135deg, #2196F3, #03A9F4, #2979FF);
            --gradient-secondary: linear-gradient(135deg, #03A9F4, #00BCD4);
            --gradient-dark: linear-gradient(135deg, #0A1929, #132F4C);
            --gradient-card: linear-gradient(145deg, rgba(33, 150, 243, 0.1), rgba(3, 169, 244, 0.05));
            --glass-bg: rgba(19, 47, 76, 0.4);
            --glass-border: rgba(255, 255, 255, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        
        body {
            font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            color: var(--light-text);
            background: var(--gradient-dark);
            min-height: 100vh;
            overflow-x: hidden;
            background-attachment: fixed;
            position: relative;
        }
        
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 10% 20%, rgba(33, 150, 243, 0.1) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(3, 169, 244, 0.1) 0%, transparent 40%),
                radial-gradient(circle at 50% 50%, rgba(41, 121, 255, 0.05) 0%, transparent 60%);
            z-index: -1;
            pointer-events: none;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        
        a:hover {
            opacity: 0.9;
        }
        
        ul, ol {
            list-style: none;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 8px;
            transition: var(--transition);
        }
        
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        .clearfix::after {
            content: '';
            display: table;
            clear: both;
        }
        
        /* 加载动画 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes slideIn {
            from { transform: translateX(-30px); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }
        
        @keyframes pulse {
            0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(33, 150, 243, 0.4); }
            70% { transform: scale(1.05); box-shadow: 0 0 0 15px rgba(33, 150, 243, 0); }
            100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(33, 150, 243, 0); }
        }
        
        @keyframes float {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            33% { transform: translateY(-15px) rotate(2deg); }
            66% { transform: translateY(5px) rotate(-2deg); }
        }
        
        @keyframes shimmer {
            0% { background-position: -1000px 0; }
            100% { background-position: 1000px 0; }
        }
        
        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }
        
        /* 头部样式 */
        .app-header {
            background: var(--glass-bg);
            backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--glass-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
            animation: fadeIn 0.8s ease-out 0.2s both;
        }
        
        .header-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .app-logo {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        
        .logo-icon {
            width: 56px;
            height: 56px;
            background: var(--gradient-primary);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: white;
            box-shadow: 0 8px 25px rgba(33, 150, 243, 0.3);
            animation: pulse 3s infinite;
            position: relative;
            overflow: hidden;
        }
        
        .logo-icon::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            animation: shimmer 3s infinite;
        }
        
        .logo-text {
            display: flex;
            flex-direction: column;
        }
        
        .logo-title {
            font-size: 28px;
            font-weight: 800;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.1;
            letter-spacing: -0.5px;
        }
        
        .logo-subtitle {
            font-size: 13px;
            color: var(--primary-light);
            margin-top: 6px;
            font-weight: 500;
            letter-spacing: 1px;
        }
        
        /* 下载按钮 */
        .download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 16px 36px;
            background: var(--gradient-primary);
            color: white;
            border-radius: var(--radius);
            font-size: 17px;
            font-weight: 700;
            text-align: center;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
            z-index: 1;
            letter-spacing: 0.5px;
        }
        
        .download-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.7s;
            z-index: -1;
        }
        
        .download-btn:hover::before {
            left: 100%;
        }
        
        .download-btn:hover {
            transform: translateY(-5px) scale(1.02);
            box-shadow: var(--shadow-strong);
        }
        
        .download-btn:active {
            transform: translateY(-2px) scale(1);
        }
        
        .download-btn-large {
            padding: 20px 48px;
            font-size: 18px;
            border-radius: var(--radius-lg);
        }
        
        /* 英雄区域 */
        .hero-section {
            padding: 100px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .hero-title {
            font-size: 56px;
            font-weight: 900;
            margin-bottom: 24px;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.1;
            animation: fadeIn 1s ease-out 0.3s both;
            letter-spacing: -1px;
        }
        
        .hero-subtitle {
            font-size: 22px;
            color: var(--gray-text);
            max-width: 900px;
            margin: 0 auto 48px;
            line-height: 1.7;
            animation: fadeIn 1s ease-out 0.5s both;
        }
        
        .version-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            background: var(--gradient-card);
            color: var(--primary-light);
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 40px;
            border: 1px solid rgba(33, 150, 243, 0.3);
            animation: fadeIn 1s ease-out 0.4s both;
            backdrop-filter: blur(10px);
        }
        
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 24px;
            margin-bottom: 80px;
            flex-wrap: wrap;
            animation: fadeIn 1s ease-out 0.7s both;
        }
        
        .app-screenshot {
            max-width: 360px;
            margin: 0 auto;
            animation: float 8s ease-in-out infinite;
            filter: drop-shadow(0 25px 50px rgba(0, 0, 0, 0.5));
        }
        
        /* 特性区域 */
        .features-section {
            padding: 100px 0;
            position: relative;
        }
        
        .features-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .section-title {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 72px;
            text-align: center;
            position: relative;
            color: var(--light-text);
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -20px;
            left: 50%;
            transform: translateX(-50%);
            width: 120px;
            height: 4px;
            background: var(--gradient-primary);
            border-radius: 2px;
            animation: gradientShift 3s ease infinite;
            background-size: 200% 200%;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }
        
        .feature-card {
            background: var(--gradient-card);
            backdrop-filter: blur(20px);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
            border: 1px solid var(--glass-border);
            transition: var(--transition);
            animation: fadeIn 0.8s ease-out;
            animation-fill-mode: both;
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--gradient-primary);
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: -1;
        }
        
        .feature-card:hover::before {
            opacity: 0.1;
        }
        
        .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:hover {
            transform: translateY(-12px);
            box-shadow: var(--shadow-strong);
            border-color: var(--primary-color);
        }
        
        .feature-icon {
            width: 88px;
            height: 88px;
            background: var(--gradient-primary);
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 28px;
            font-size: 40px;
            box-shadow: 0 10px 30px rgba(33, 150, 243, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .feature-icon::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            animation: shimmer 3s infinite;
        }
        
        .feature-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--light-text);
        }
        
        .feature-description {
            color: var(--gray-text);
            line-height: 1.7;
            font-size: 16px;
        }
        
        /* 下载区域 */
        .download-section {
            padding: 100px 0;
            text-align: center;
            position: relative;
        }
        
        .download-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .download-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 60px;
        }
        
        .download-card {
            background: var(--gradient-card);
            backdrop-filter: blur(20px);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            border: 1px solid var(--glass-border);
            transition: var(--transition);
            animation: fadeIn 0.8s ease-out;
            animation-fill-mode: both;
            position: relative;
            overflow: hidden;
        }
        
        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--gradient-primary);
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: -1;
        }
        
        .download-card:hover::before {
            opacity: 0.1;
        }
        
        .download-card:nth-child(1) { animation-delay: 0.1s; }
        .download-card:nth-child(2) { animation-delay: 0.2s; }
        .download-card:nth-child(3) { animation-delay: 0.3s; }
        
        .download-card:hover {
            transform: translateY(-12px);
            box-shadow: var(--shadow-strong);
            border-color: var(--primary-color);
        }
        
        .os-icon {
            width: 100px;
            height: 100px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 32px;
            font-size: 48px;
            box-shadow: 0 15px 35px rgba(33, 150, 243, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .os-icon::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            animation: shimmer 3s infinite;
        }
        
        .os-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--light-text);
        }
        
        .os-info {
            color: var(--gray-text);
            margin-bottom: 32px;
            min-height: 72px;
            line-height: 1.7;
            font-size: 16px;
        }
        
        /* 系统要求 */
        .requirements-section {
            padding: 100px 0;
            position: relative;
        }
        
        .requirements-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .requirements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
            margin-top: 60px;
        }
        
        .requirement-item {
            background: var(--gradient-card);
            backdrop-filter: blur(20px);
            border-radius: var(--radius);
            padding: 36px 28px;
            border: 1px solid var(--glass-border);
            transition: var(--transition);
            animation: fadeIn 0.8s ease-out;
            animation-fill-mode: both;
            position: relative;
            overflow: hidden;
        }
        
        .requirement-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--gradient-primary);
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: -1;
        }
        
        .requirement-item:hover::before {
            opacity: 0.1;
        }
        
        .requirement-item:nth-child(1) { animation-delay: 0.1s; }
        .requirement-item:nth-child(2) { animation-delay: 0.2s; }
        .requirement-item:nth-child(3) { animation-delay: 0.3s; }
        .requirement-item:nth-child(4) { animation-delay: 0.4s; }
        
        .requirement-item:hover {
            transform: translateY(-8px);
            border-color: var(--primary-color);
            box-shadow: var(--shadow);
        }
        
        .req-icon {
            width: 68px;
            height: 68px;
            background: var(--gradient-primary);
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 28px;
            box-shadow: 0 8px 25px rgba(33, 150, 243, 0.3);
        }
        
        .req-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--light-text);
        }
        
        .req-description {
            color: var(--gray-text);
            font-size: 15px;
            line-height: 1.6;
        }
        
        /* 安装步骤 */
        .steps-section {
            padding: 100px 0;
            position: relative;
        }
        
        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .steps-container {
            max-width: 900px;
            margin: 60px auto 0;
            position: relative;
        }
        
        .steps-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 36px;
            bottom: 0;
            width: 4px;
            background: var(--gradient-primary);
            border-radius: 2px;
            animation: gradientShift 3s ease infinite;
            background-size: 200% 200%;
        }
        
        .step-item {
            display: flex;
            margin-bottom: 56px;
            position: relative;
            animation: slideIn 0.8s ease-out;
            animation-fill-mode: both;
        }
        
        .step-item:nth-child(1) { animation-delay: 0.1s; }
        .step-item:nth-child(2) { animation-delay: 0.3s; }
        .step-item:nth-child(3) { animation-delay: 0.5s; }
        .step-item:nth-child(4) { animation-delay: 0.7s; }
        
        .step-number {
            width: 72px;
            height: 72px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            font-weight: 800;
            color: white;
            margin-right: 36px;
            flex-shrink: 0;
            z-index: 1;
            box-shadow: 0 10px 30px rgba(33, 150, 243, 0.4);
            position: relative;
            overflow: hidden;
        }
        
        .step-number::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
            animation: shimmer 3s infinite;
        }
        
        .step-content {
            flex: 1;
            background: var(--gradient-card);
            backdrop-filter: blur(20px);
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--glass-border);
            transition: var(--transition);
        }
        
        .step-item:hover .step-content {
            border-color: var(--primary-color);
            box-shadow: var(--shadow);
        }
        
        .step-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--primary-light);
        }
        
        .step-description {
            color: var(--gray-text);
            line-height: 1.7;
            font-size: 16px;
        }
        
        /* 常见问题 */
        .faq-section {
            padding: 100px 0;
            position: relative;
        }
        
        .faq-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .faq-container {
            max-width: 900px;
            margin: 60px auto 0;
        }
        
        .faq-item {
            background: var(--gradient-card);
            backdrop-filter: blur(20px);
            border-radius: var(--radius);
            padding: 32px;
            margin-bottom: 20px;
            border: 1px solid var(--glass-border);
            transition: var(--transition);
            animation: fadeIn 0.8s ease-out;
            animation-fill-mode: both;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }
        
        .faq-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--gradient-primary);
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: -1;
        }
        
        .faq-item:hover::before {
            opacity: 0.05;
        }
        
        .faq-item:nth-child(1) { animation-delay: 0.1s; }
        .faq-item:nth-child(2) { animation-delay: 0.2s; }
        .faq-item:nth-child(3) { animation-delay: 0.3s; }
        .faq-item:nth-child(4) { animation-delay: 0.4s; }
        .faq-item:nth-child(5) { animation-delay: 0.5s; }
        
        .faq-item:hover {
            border-color: var(--primary-color);
            transform: translateX(8px);
        }
        
        .faq-question {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--light-text);
        }
        
        .faq-question::after {
            content: '▼';
            font-size: 16px;
            color: var(--primary-color);
            transition: transform 0.4s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }
        
        .faq-item.active .faq-question::after {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            color: var(--gray-text);
            line-height: 1.7;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.6s ease, margin-top 0.6s ease;
            font-size: 16px;
        }
        
        .faq-item.active .faq-answer {
            max-height: 500px;
            margin-top: 20px;
        }
        
        /* 页脚样式 */
        .app-footer {
            margin-top: 100px;
            background: var(--glass-bg);
            border-top: 1px solid var(--glass-border);
            padding: 80px 0 40px;
            backdrop-filter: blur(20px);
            position: relative;
        }
        
        .app-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 48px;
            margin-bottom: 48px;
        }
        
        .footer-section h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 28px;
            color: var(--light-text);
            position: relative;
            padding-bottom: 12px;
        }
        
        .footer-section h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--gradient-primary);
            border-radius: 3px;
        }
        
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        
        .footer-links a {
            color: var(--gray-text);
            transition: var(--transition);
            padding: 8px 0;
            position: relative;
            padding-left: 24px;
        }
        
        .footer-links a::before {
            content: '›';
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-size: 20px;
            transition: transform 0.3s ease;
        }
        
        .footer-links a:hover {
            color: var(--primary-light);
            transform: translateX(8px);
        }
        
        .footer-links a:hover::before {
            transform: translateX(4px);
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid var(--glass-border);
            color: var(--gray-text);
            font-size: 15px;
        }
        
        .copyright {
            margin-bottom: 16px;
            font-size: 16px;
        }
        
        .seo-text {
            color: var(--gray-text);
            font-size: 15px;
            line-height: 1.8;
            margin-top: 32px;
            padding: 32px;
            background: var(--gradient-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(20px);
        }
        
        .seo-text h3 {
            color: var(--light-text);
            margin-bottom: 24px;
            font-size: 24px;
        }
        
        .seo-text p {
            margin-bottom: 20px;
        }
        
        /* 返回顶部按钮 */
        .back-to-top {
            position: fixed;
            bottom: 40px;
            right: 40px;
            width: 60px;
            height: 60px;
            background: var(--gradient-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
            box-shadow: 0 10px 30px rgba(33, 150, 243, 0.3);
            border: none;
            outline: none;
        }
        
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            transform: translateY(-8px) scale(1.1);
            box-shadow: 0 15px 35px rgba(33, 150, 243, 0.5);
        }
        
        /* 进度条 */
        .reading-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: var(--gradient-primary);
            z-index: 1001;
            transition: width 0.3s ease;
            animation: gradientShift 3s ease infinite;
            background-size: 200% 200%;
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .container {
                max-width: 100%;
                padding: 0 20px;
            }
            
            .hero-title {
                font-size: 48px;
            }
        }
        
        @media (max-width: 992px) {
            .hero-title {
                font-size: 42px;
            }
            
            .hero-subtitle {
                font-size: 20px;
            }
            
            .section-title {
                font-size: 36px;
            }
            
            .features-grid,
            .download-cards,
            .requirements-grid {
                grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            }
            
            .hero-buttons {
                gap: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                gap: 20px;
                text-align: center;
            }
            
            .hero-title {
                font-size: 36px;
            }
            
            .hero-subtitle {
                font-size: 18px;
                padding: 0 16px;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
                padding: 0 16px;
            }
            
            .download-btn {
                width: 100%;
                max-width: 320px;
            }
            
            .section-title {
                font-size: 32px;
            }
            
            .features-grid,
            .download-cards,
            .requirements-grid {
                grid-template-columns: 1fr;
                padding: 0 16px;
            }
            
            .steps-container::before {
                left: 30px;
            }
            
            .step-number {
                width: 60px;
                height: 60px;
                font-size: 24px;
                margin-right: 24px;
            }
            
            .faq-container {
                padding: 0 16px;
            }
            
            .back-to-top {
                bottom: 24px;
                right: 24px;
                width: 52px;
                height: 52px;
                font-size: 20px;
            }
        }
        
        @media (max-width: 480px) {
            .hero-title {
                font-size: 32px;
            }
            
            .hero-subtitle {
                font-size: 17px;
            }
            
            .version-badge {
                font-size: 14px;
                padding: 10px 24px;
            }
            
            .section-title {
                font-size: 28px;
            }
            
            .feature-card,
            .download-card,
            .requirement-item {
                padding: 36px 24px;
            }
            
            .step-content {
                padding: 24px;
            }
            
            .faq-item {
                padding: 24px;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
                padding: 0 16px;
            }
            
            .footer-section h3::after {
                left: 50%;
                transform: translateX(-50%);
            }
            
            .footer-links a {
                padding-left: 0;
            }
            
            .footer-links a::before {
                display: none;
            }
            
            .seo-text {
                padding: 24px;
                margin: 24px 16px;
            }
        }
        
        /* 深色模式优化 */
        @media (prefers-color-scheme: dark) {
            :root {
                --dark-bg: #0A1929;
                --dark-secondary: #132F4C;
                --card-bg: rgba(19, 47, 76, 0.85);
            }
        }
        
        /* 打印样式 */
        @media print {
            .app-header,
            .app-footer,
            .back-to-top,
            .download-btn {
                display: none !important;
            }
            
            body {
                background: white !important;
                color: black !important;
            }
            
            .container {
                max-width: 100% !important;
                padding: 0 !important;
            }
            
            .hero-title {
                color: #1976D2 !important;
                -webkit-text-fill-color: #1976D2 !important;
            }
        }
        
        /* 图标字体模拟 */
        .iconfont {
            font-family: 'Material Icons', 'Segoe UI Symbol', sans-serif;
            font-weight: normal;
            font-style: normal;
            font-size: 24px;
            display: inline-block;
            line-height: 1;
            text-transform: none;
            letter-spacing: normal;
            word-wrap: normal;
            white-space: nowrap;
            direction: ltr;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
            -moz-osx-font-smoothing: grayscale;
            font-feature-settings: 'liga';
        }
        
        /* 自定义图标 */
        .icon-strawberry:before { content: "🍓"; }
        .icon-download:before { content: "⬇️"; }
        .icon-android:before { content: "🤖"; }
        .icon-apple:before { content: "🍎"; }
        .icon-windows:before { content: "🪟"; }
        .icon-video:before { content: "🎬"; }
        .icon-hd:before { content: "📺"; }
        .icon-speed:before { content: "⚡"; }
        .icon-safe:before { content: "🛡️"; }
        .icon-cpu:before { content: "🖥️"; }
        .icon-ram:before { content: "💾"; }
        .icon-storage:before { content: "💿"; }
        .icon-os:before { content: "🔧"; }
        .icon-up:before { content: "↑"; }
/* 长尾下载板块样式 */
        .longtail-section {
            margin: 40px 0 30px;
            padding: 25px 0;
            background: rgba(10, 25, 41, 0.7);
            border-radius: 20px;
            border: 1px solid rgba(33, 150, 243, 0.2);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }
        
        .longtail-title {
            text-align: center;
            font-size: 20px;
            color: #64B5F6;
            margin-bottom: 20px;
            font-weight: 600;
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .longtail-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, transparent, #2196F3, transparent);
        }
        
        .longtail-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .longtail-btn {
            background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(3, 169, 244, 0.1));
            border: 1px solid rgba(33, 150, 243, 0.3);
            color: #90CAF9;
            padding: 12px 20px;
            border-radius: 12px;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 180px;
            flex: 1 0 auto;
            max-width: 220px;
        }
        
        .longtail-btn:hover {
            background: linear-gradient(135deg, rgba(33, 150, 243, 0.2), rgba(3, 169, 244, 0.2));
            border-color: #2196F3;
            color: #E3F2FD;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(33, 150, 243, 0.2);
        }
        
        .longtail-btn i {
            margin-right: 8px;
            font-size: 16px;
        }
        
        @media (max-width: 768px) {
            .longtail-buttons {
                gap: 10px;
            }
            
            .longtail-btn {
                min-width: 160px;
                padding: 10px 15px;
                font-size: 13px;
                flex: 0 0 calc(50% - 10px);
            }
        }
        
        @media (max-width: 576px) {
            .longtail-btn {
                flex: 0 0 100%;
                max-width: 100%;
            }
        }
        
         /* 长尾下载板块样式 */
        .longtail-section {
            margin: 40px 0 30px;
            padding: 25px 0;
            background: rgba(10, 25, 41, 0.7);
            border-radius: 20px;
            border: 1px solid rgba(33, 150, 243, 0.2);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        }
        
        .longtail-title {
            text-align: center;
            font-size: 20px;
            color: #64B5F6;
            margin-bottom: 20px;
            font-weight: 600;
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .longtail-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, transparent, #2196F3, transparent);
        }
        
        .longtail-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 1000px;
            margin: 0 auto;
        }
        
        .longtail-btn {
            background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(3, 169, 244, 0.1));
            border: 1px solid rgba(33, 150, 243, 0.3);
            color: #90CAF9;
            padding: 12px 20px;
            border-radius: 12px;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 180px;
            flex: 1 0 auto;
            max-width: 220px;
        }
        
        .longtail-btn:hover {
            background: linear-gradient(135deg, rgba(33, 150, 243, 0.2), rgba(3, 169, 244, 0.2));
            border-color: #2196F3;
            color: #E3F2FD;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(33, 150, 243, 0.2);
        }
        
        .longtail-btn i {
            margin-right: 8px;
            font-size: 16px;
        }
        
        /* 全国区域性软件属性数据样式 */
        .regional-data-section {
            background: rgba(15, 30, 50, 0.7);
            border-radius: 18px;
            padding: 25px;
            margin: 30px 0;
            border: 1px solid rgba(33, 150, 243, 0.2);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
        }
        
        .regional-title {
            font-size: 22px;
            color: #2196F3;
            margin-bottom: 20px;
            text-align: center;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        .regional-title i {
            font-size: 24px;
        }
        
        .regional-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-bottom: 25px;
        }
        
        .download-statistics, .regional-distribution, .news-updates {
            background: rgba(25, 40, 60, 0.8);
            border-radius: 15px;
            padding: 20px;
            border: 1px solid rgba(33, 150, 243, 0.15);
        }
        
        .data-title {
            font-size: 18px;
            color: #64B5F6;
            margin-bottom: 15px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .data-title i {
            font-size: 20px;
        }
        
        .total-downloads {
            font-size: 28px;
            color: #4FC3F7;
            font-weight: 700;
            text-align: center;
            margin: 15px 0;
        }
        
        .download-growth {
            color: #81C784;
            font-size: 14px;
            text-align: center;
            margin-bottom: 15px;
        }
        
        .region-list {
            list-style: none;
            padding: 0;
        }
        
        .region-item {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px solid rgba(33, 150, 243, 0.1);
        }
        
        .region-name {
            color: #BBDEFB;
        }
        
        .region-count {
            color: #4FC3F7;
            font-weight: 500;
        }
        
        .news-item {
            padding: 12px 0;
            border-bottom: 1px solid rgba(33, 150, 243, 0.1);
        }
        
        .news-date {
            color: #81C784;
            font-size: 13px;
            margin-bottom: 5px;
        }
        
        .news-content {
            color: #E3F2FD;
            font-size: 14px;
            line-height: 1.5;
        }
        
        /* 软件详细说明介绍样式 */
        .software-details-section {
            background: linear-gradient(145deg, rgba(15, 30, 50, 0.8), rgba(25, 40, 60, 0.8));
            border-radius: 20px;
            padding: 30px;
            margin: 30px 0;
            border: 1px solid rgba(33, 150, 243, 0.25);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
        }
        
        .software-details-title {
            font-size: 24px;
            color: #2196F3;
            margin-bottom: 25px;
            text-align: center;
            font-weight: 600;
            position: relative;
            padding-bottom: 10px;
        }
        
        .software-details-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            background: linear-gradient(90deg, transparent, #03A9F4, transparent);
        }
        
        .details-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }
        
        .basic-info, .system-info, .user-reviews {
            background: rgba(20, 35, 55, 0.9);
            border-radius: 15px;
            padding: 22px;
            border: 1px solid rgba(33, 150, 243, 0.2);
        }
        
        .details-subtitle {
            font-size: 18px;
            color: #64B5F6;
            margin-bottom: 18px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            padding-bottom: 8px;
            border-bottom: 1px solid rgba(33, 150, 243, 0.2);
        }
        
        .details-subtitle i {
            font-size: 20px;
        }
        
        .info-item {
            display: flex;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid rgba(33, 150, 243, 0.1);
        }
        
        .info-label {
            color: #BBDEFB;
            font-weight: 500;
        }
        
        .info-value {
            color: #4FC3F7;
            font-weight: 500;
        }
        
        .system-list {
            list-style: none;
            padding: 0;
        }
        
        .system-item {
            padding: 10px 0;
            border-bottom: 1px solid rgba(33, 150, 243, 0.1);
            color: #E3F2FD;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .system-item i {
            color: #4FC3F7;
            font-size: 16px;
        }
        
        .review-item {
            background: rgba(25, 40, 60, 0.8);
            border-radius: 12px;
            padding: 18px;
            margin-bottom: 15px;
            border: 1px solid rgba(33, 150, 243, 0.15);
        }
        
        .review-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
        }
        
        .reviewer-name {
            color: #4FC3F7;
            font-weight: 500;
        }
        
        .review-rating {
            color: #FFB74D;
            font-weight: 500;
        }
        
        .review-content {
            color: #E3F2FD;
            font-size: 14px;
            line-height: 1.6;
        }
        
        .review-date {
            color: #81C784;
            font-size: 12px;
            margin-top: 10px;
            text-align: right;
        }
        
        @media (max-width: 768px) {
            .longtail-buttons {
                gap: 10px;
            }
            
            .longtail-btn {
                min-width: 160px;
                padding: 10px 15px;
                font-size: 13px;
                flex: 0 0 calc(50% - 10px);
            }
            
            .regional-grid, .details-grid {
                grid-template-columns: 1fr;
            }
            
            .regional-data-section, .software-details-section {
                padding: 20px;
            }
        }
        
        @media (max-width: 576px) {
            .longtail-btn {
                flex: 0 0 100%;
                max-width: 100%;
            }
        }