: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;
        }

/* 独立命名空间，绝对不会污染原有样式 */
.aibtn-custom-container {
  width: 100%;
  max-width: 800px;
  margin: 30px auto 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  padding: 0 20px;
  box-sizing: border-box;
}
.aibtn-custom {
  position: relative;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: #0d0f17;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  min-width: 160px;
}
.aibtn-custom::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  /*background: linear-gradient(45deg, #4fc3f7, #673ab7, #e91e63, #4fc3f7);*/
  background-size: 300% 300%;
  z-index: -1;
  border-radius: 12px;
  animation: aibtn-glow 6s linear infinite;
}
@keyframes aibtn-glow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.aibtn-custom::after {
  content: '';
  position: absolute;
  inset: 1px;
  background: #4b009e;
  border-radius: 11px;
  z-index: -1;
}
/* 高亮主按钮 */
.aibtn-highlight {
  color: #fff;
  font-weight: 700;
}
.aibtn-highlight::after {
  background: linear-gradient(45deg, #f74f4f, #673ab7);
}
/* 交互效果 */
.aibtn-custom:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(79, 195, 247, 0.35);
}
.aibtn-custom:active {
  transform: translateY(1px);
  box-shadow: 0 2px 8px rgba(79, 195, 247, 0.2);
}
/* 适配手机 */
@media (max-width: 600px) {
  .aibtn-custom {
    width: 100%;
    max-width: 280px;
  }
}

/* 新增独立CSS 不冲突 */
.logo-img{width:36px;height:36px;vertical-align:middle;margin-right:10px;}
.ai-img-case{padding:70px 20px;background:#0b0b1b;text-align:center;}
.ai-img-case h2{margin-bottom:12px;}
.ai-img-case p{color:#ccc;margin-bottom:40px;max-width:900px;margin-left:auto;margin-right:auto;}
.img-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1100px;margin:0 auto;}
.img-card{background:#141425;border-radius:12px;overflow:hidden;}
.img-card img{width:100%;height:220px;object-fit:cover;cursor:pointer;}
.img-card h3{padding:14px;font-size:16px;color:#fff;margin:0;}
.img-card p{padding:0 14px 14px;color:#bbb;font-size:14px;}
.faq{padding:70px 20px;}
.faq h2{text-align:center;margin-bottom:12px;}
.faq p{text-align:center;color:#ccc;margin-bottom:40px;}
.faq-container{max-width:900px;margin:0 auto;}
.faq-item{background:#181830;border-radius:10px;margin-bottom:10px;overflow:hidden;}
.faq-q{padding:18px 20px;color:#fff;font-weight:500;display:flex;justify-content:space-between;align-items:center;cursor:pointer;}
.faq-a{max-height:0;overflow:hidden;transition:all 0.3s;padding:0 20px;color:#ccc;}
.faq-a-inner{padding-bottom:18px;}
.faq-item.active .faq-a{max-height:500px;}
.img-popup{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.9);display:flex;align-items:center;justify-content:center;z-index:9999;opacity:0;pointer-events:none;transition:0.3s;}
.img-popup.active{opacity:1;pointer-events:auto;}
.img-popup img{max-width:90%;max-height:90%;border-radius:8px;}
.img-close{position:absolute;top:30px;right:30px;color:#fff;font-size:32px;cursor:pointer;}

/* ========== 视频弹窗【原生比例·绝不拉伸·终极修复】 ========== */
.video-modal{
  position:fixed;
  top:0;left:0;
  width:100%;height:100%;
  background:rgba(0,0,0,0.9);
  z-index:9998;
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transition:opacity 0.3s ease;
}
.video-modal.active{opacity:1;pointer-events:auto;}

/* 外层：限制最大尺寸，居中，不拉伸 */
.video-modal-content{
  position:relative;
  width:auto;
  height:auto;
  max-width:90%;
  max-height:90vh;
  background:#000;
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 0 30px rgba(255,255,255,0.1);
  display:flex;
  flex-direction:column;
}

.close-modal{
  position:absolute;
  top:15px;right:15px;
  background:rgba(255,255,255,0.2);
  border:none;color:#fff;
  width:36px;height:36px;
  border-radius:50%;font-size:20px;
  cursor:pointer;z-index:10;
  display:flex;align-items:center;justify-content:center;
}

/* 核心：视频保持原生比例，完整显示、居中、不拉伸 */
.video-player{
  width:100%;
  height:auto;
  max-height:calc(90vh - 50px);
  display:block;
  object-fit:contain; /* 关键：保留原比例，完整显示，不裁剪、不拉伸 */
  background:#000;
}

.video-controls{
  display:flex;
  align-items:center;
  justify-content:center;
  padding:10px;
  background:#111;
  gap:15px;
}
.video-control-btn{
  background:transparent;border:none;color:#fff;
  font-size:18px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  transition:background 0.2s;
}
.video-control-btn:hover{background:rgba(255,255,255,0.1);}
#pauseBtn{display:none;}