:root {
            --primary: #6a11cb;
            --secondary: #2575fc;
            --accent: #00d2ff;
            --dark: #0a0a1a;
            --light: #f8f9fa;
            --neon: #00ff9d;
            --gradient: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            --gradient-reverse: linear-gradient(135deg, var(--accent), var(--secondary), var(--primary));
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Exo 2', sans-serif;
            background-color: var(--dark);
            color: var(--light);
            line-height: 1.6;
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(106, 17, 203, 0.15) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, rgba(37, 117, 252, 0.1) 0%, transparent 20%);
            min-height: 100vh;
        }
        
        /* 动态背景 */
        .dynamic-bg {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            opacity: 0.3;
            background: 
                radial-gradient(circle at 20% 30%, rgba(106, 17, 203, 0.4) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(37, 117, 252, 0.3) 0%, transparent 40%);
            animation: pulse 15s ease-in-out infinite alternate;
        }
        
        @keyframes pulse {
            0% { opacity: 0.2; transform: scale(1); }
            100% { opacity: 0.4; transform: scale(1.05); }
        }
        
        /* 导航栏 */
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 5%;
            background-color: rgba(10, 10, 26, 0.9);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(0, 210, 255, 0.2);
        }
        
        .logo {
            font-family: 'Orbitron', sans-serif;
            font-size: 1.8rem;
            font-weight: 700;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 0 20px rgba(106, 17, 203, 0.5);
        }
        
        .nav-links {
            display: flex;
            gap: 2rem;
        }
        
        .nav-links a {
            color: var(--light);
            text-decoration: none;
            font-weight: 500;
            position: relative;
            padding: 0.5rem 0;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: var(--accent);
        }
        
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient);
            transition: width 0.3s;
        }
        
        .nav-links a:hover::after {
            width: 100%;
        }
        
        /* 主要区域 */
        .hero {
            padding: 4rem 5% 3rem;
            text-align: center;
            max-width: 1200px;
            margin: 0 auto;
        }
        
        /* 动态渐变色标题 */
        .dynamic-gradient-text {
            font-family: 'Orbitron', sans-serif;
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            background: linear-gradient(90deg, 
                #6a11cb, #2575fc, #00d2ff, #6a11cb, #2575fc, #00d2ff);
            background-size: 300% 100%;
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 0 30px rgba(0, 210, 255, 0.3);
            line-height: 1.2;
            animation: gradientMove 8s linear infinite;
        }
        
        @keyframes gradientMove {
            0% { background-position: 0% 50%; }
            100% { background-position: 300% 50%; }
        }
        
        .hero p {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 3rem;
            color: rgba(255, 255, 255, 0.8);
        }
        
        .highlight {
            color: var(--accent);
            font-weight: 600;
        }
        
        /* 二维码区域 */
        .qr-section {
            display: flex;
            justify-content: center;
            gap: 4rem;
            margin: 3rem 0 4rem;
            flex-wrap: wrap;
        }
        
        .qr-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            padding: 2rem;
            text-align: center;
            border: 1px solid rgba(0, 210, 255, 0.2);
            transition: transform 0.3s, box-shadow 0.3s;
            width: 280px;
        }
        
        .qr-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 210, 255, 0.2);
            border-color: var(--accent);
        }
        
        .qr-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            color: var(--accent);
        }
        
        .qr-img {
            width: 180px;
            height: 180px;
            margin: 0 auto 1rem;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid rgba(0, 210, 255, 0.3);
            background-color: rgba(0, 0, 0, 0.2);
        }
        
        .qr-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        /* AI视频案例区域 */
        .video-cases {
            max-width: 900px;
            margin: 0 auto 5rem;
            padding: 0 5%;
            text-align: center;
        }
        
        .section-title-small {
            font-family: 'Orbitron', sans-serif;
            font-size: 2rem;
            margin-bottom: 2rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .video-cases-subtitle {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 2.5rem;
            font-size: 1.1rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .video-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }
        
        .video-item {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            padding: 1.5rem;
            border: 1px solid rgba(0, 210, 255, 0.1);
            transition: all 0.3s;
            text-align: center;
        }
        
        .video-item:hover {
            transform: translateY(-5px);
            border-color: var(--accent);
            box-shadow: 0 10px 25px rgba(0, 210, 255, 0.15);
        }
        
        .video-thumbnail {
            width: 100%;
            max-width: 240px;
            height: 320px; /* 3:4竖屏比例 */
            margin: 0 auto 1.2rem;
            border-radius: 12px;
            overflow: hidden;
            position: relative;
            cursor: pointer;
            border: 2px solid rgba(255, 255, 255, 0.1);
            background: linear-gradient(45deg, rgba(106, 17, 203, 0.2), rgba(37, 117, 252, 0.2));
        }
        
        .video-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .video-thumbnail:hover img {
            transform: scale(1.05);
        }
        
        .video-thumbnail::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.3);
            z-index: 1;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .video-thumbnail:hover::before {
            opacity: 1;
        }
        
        .video-thumbnail::after {
            content: '\f04b';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-size: 3rem;
            z-index: 2;
            opacity: 0.8;
            text-shadow: 0 0 20px rgba(0, 210, 255, 0.5);
            transition: all 0.3s;
        }
        
        .video-thumbnail:hover::after {
            opacity: 1;
            transform: translate(-50%, -50%) scale(1.1);
        }
        
        .video-title {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--accent);
        }
        
        .video-desc {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }
        
        /* 视频播放模态框 */
        .video-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .video-modal.active {
            display: flex;
            opacity: 1;
        }
        
        .video-modal-content {
            position: relative;
            width: 90%;
            max-width: 360px; /* 3:4竖屏视频宽度 */
            height: 480px; /* 3:4竖屏视频高度 */
            background: #000;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
            border: 2px solid var(--accent);
        }
        
        /* 视频播放器样式 */
        .video-player {
            width: 100%;
            height: 100%;
            object-fit: cover;
            background: #000;
        }
        
        .video-controls {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
            padding: 1rem;
            display: flex;
            justify-content: center;
            gap: 1rem;
            opacity: 0;
            transition: opacity 0.3s;
        }
        
        .video-modal-content:hover .video-controls {
            opacity: 1;
        }
        
        .video-control-btn {
            background: rgba(255, 255, 255, 0.2);
            border: none;
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: all 0.3s;
        }
        
        .video-control-btn:hover {
            background: var(--accent);
            transform: scale(1.1);
        }
        
        .close-modal {
            position: absolute;
            top: -40px;
            right: 0;
            background: none;
            border: none;
            color: white;
            font-size: 2rem;
            cursor: pointer;
            transition: color 0.3s;
        }
        
        .close-modal:hover {
            color: var(--accent);
        }
        
        /* 功能介绍区域 - 改进为单行布局 */
        .section-title {
            font-family: 'Orbitron', sans-serif;
            font-size: 2.5rem;
            text-align: center;
            margin-bottom: 3rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        /* 功能区域改进为单行布局，类似平台卡片样式 */
        .features {
            max-width: 1200px;
            margin: 0 auto 6rem;
            padding: 0 5%;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        
        .feature-item {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            padding: 2rem;
            border: 1px solid rgba(0, 210, 255, 0.1);
            transition: all 0.3s;
            text-align: left;
        }
        
        .feature-item:hover {
            transform: translateY(-5px);
            border-color: var(--accent);
            box-shadow: 0 10px 25px rgba(0, 210, 255, 0.15);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .feature-item h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--accent);
        }
        
        .feature-item p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            line-height: 1.5;
        }
        
        /* 其他平台区域 */
        .other-platforms {
            max-width: 1200px;
            margin: 0 auto 6rem;
            padding: 0 5%;
        }
        
        .platforms {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .platform-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border-radius: 16px;
            padding: 1.8rem;
            border: 1px solid rgba(0, 210, 255, 0.1);
            transition: all 0.3s;
        }
        
        .platform-card:hover {
            border-color: var(--accent);
            box-shadow: 0 10px 20px rgba(0, 210, 255, 0.1);
        }
        
        .platform-icon {
            font-size: 2rem;
            margin-bottom: 1.2rem;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .platform-card h3 {
            font-size: 1.4rem;
            margin-bottom: 0.8rem;
            color: var(--accent);
        }
        
        .platform-link {
            display: inline-block;
            margin-top: 1rem;
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            position: relative;
            padding-bottom: 3px;
        }
        
        .platform-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s;
        }
        
        .platform-link:hover::after {
            width: 100%;
        }
        
        /* 友情链接 - 简化样式 */
        .friend-links {
            text-align: center;
            padding: 2rem 5%;
            background: rgba(0, 0, 0, 0.2);
            margin-top: 2rem;
            border-top: 1px solid rgba(0, 210, 255, 0.1);
            border-bottom: 1px solid rgba(0, 210, 255, 0.1);
        }
        
        .friend-links h3 {
            font-family: 'Exo 2', sans-serif;
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: var(--accent);
            font-weight: 500;
        }
        
        .links-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }
        
        .friend-link {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            padding: 0.5rem 1rem;
            transition: all 0.3s;
            font-size: 0.95rem;
            position: relative;
        }
        
        .friend-link:hover {
            color: var(--accent);
        }
        
        .friend-link::after {
            content: '·';
            position: absolute;
            right: -0.5rem;
            color: rgba(255, 255, 255, 0.3);
        }
        
        .friend-link:last-child::after {
            display: none;
        }
        
        /* 底部 */
        footer {
            text-align: center;
            padding: 2.5rem 5%;
            background-color: rgba(0, 0, 0, 0.5);
        }
        
        .copyright {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .dynamic-gradient-text {
                font-size: 2.8rem;
            }
            
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .qr-section {
                gap: 2rem;
            }
            
            .video-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
                margin-left: auto;
                margin-right: auto;
            }
            
            .video-thumbnail {
                max-width: 300px;
                height: 400px;
            }
            
            .video-modal-content {
                max-width: 300px;
                height: 400px;
            }
        }
        
        @media (max-width: 768px) {
            nav {
                flex-direction: column;
                gap: 1.5rem;
            }
            
            .nav-links {
                flex-wrap: wrap;
                justify-content: center;
                gap: 1.2rem;
            }
            
            .dynamic-gradient-text {
                font-size: 2.3rem;
            }
            
            .hero p {
                font-size: 1.1rem;
            }
            
            .section-title, .section-title-small {
                font-size: 2rem;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
                padding: 0 1rem;
            }
            
            .qr-card {
                width: 100%;
                max-width: 280px;
            }
            
            .video-thumbnail {
                max-width: 250px;
                height: 333px;
            }
            
            .video-modal-content {
                max-width: 250px;
                height: 333px;
            }
        }
        
        @media (max-width: 480px) {
            .dynamic-gradient-text {
                font-size: 1.8rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .section-title, .section-title-small {
                font-size: 1.7rem;
            }
            
            .friend-link {
                padding: 0.4rem 0.8rem;
                font-size: 0.9rem;
            }
            
            .video-thumbnail {
                max-width: 200px;
                height: 267px;
            }
            
            .video-modal-content {
                max-width: 200px;
                height: 267px;
            }
        }
        
        /* 动画效果 */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }
        
        .floating {
            animation: float 5s ease-in-out infinite;
        }