:root {
            --primary-color: #525456;
            --footer-bg: #343a40;
        }
        
        body {
            background-color: white;
            color: var(--primary-color);
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        
        /* 导航栏样式 */
        .navbar {
            background-color: white !important;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .navbar-brand img {
            height: 40px;
        }
        
        .navbar-nav .nav-link {
            color: var(--primary-color) !important;
            font-weight: 500;
            margin: 0 15px;
        }
        
        .navbar-nav .nav-link:hover {
            color: var(--primary-color) !important;
        }
        
        /* 首页视频背景 */
        .hero-section {
            position: relative;
            height: 100vh;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .hero-video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: -1;
        }
        
        .hero-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.3);
            z-index: 0;
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            color: white;
            max-width: 800px;
            padding: 0 20px;
        }
        
        .hero-title {
            font-size: 3.5rem;
            font-weight: bold;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        
        .hero-subtitle {
            font-size: 1.2rem;
            line-height: 1.6;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
        }
        
        .video-controls {
            position: absolute;
            bottom: 30px;
            right: 30px;
            z-index: 2;
        }
        
        .video-control-btn {
            background: rgba(255, 255, 255, 0.8);
            border: none;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-left: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .video-control-btn:hover {
            background: rgba(255, 255, 255, 1);
            transform: scale(1.1);
        }
        
        /* 产品展示 */
        .product-section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: bold;
            margin-bottom: 3rem;
            color: var(--primary-color);
        }
        
        .product-item {
            margin-bottom: 30px;
            overflow: hidden;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        
        .product-item:hover {
            transform: translateY(-5px);
        }
        
        .product-item img {
            width: 100%;
            height: 1300px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        
        .product-item:hover img {
            transform: scale(1.05);
        }
        
        /* 联系我们 */
        .contact-section {
            padding: 80px 0;
            background-color: #f8f9fa;
        }
        
        .contact-item {
            text-align: center;
            padding: 30px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            margin-bottom: 30px;
            transition: transform 0.3s ease;
        }
        
        .contact-item:hover {
            transform: translateY(-5px);
        }
        
        .contact-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .contact-title {
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 15px;
            color: var(--primary-color);
        }
        
        .contact-info {
            font-size: 1.1rem;
            color: #666;
        }
        
        .contact-link {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .contact-link:hover {
            color: var(--primary-color);
            text-decoration: underline;
        }
        
        /* 底部 */
        .footer {
            background-color: var(--footer-bg);
            color: #fff;
            padding: 40px 0 20px;
        }
        
        .footer-content {
            text-align: center;
        }
        
        .footer-links {
            margin-bottom: 20px;
        }
        
        .footer-link {
            color: #fff;
            text-decoration: none;
            margin: 0 15px;
        }
        
        .footer-link:hover {
            color: #fff;
            text-decoration: underline;
        }
        
        .footer-info {
            margin-bottom: 10px;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .hero-video {
                display: block; /* 确保视频在移动端显示 */
            }
            
            .hero-section {
                min-height: 100vh; /* 使用min-height而不是height */
            }
            
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .product-item img {
                height: 500px;
            }
            
            .video-controls {
                bottom: 20px;
                right: 20px;
            }
            
            .video-control-btn {
                width: 40px;
                height: 40px;
            }
        }
        
        /* 平滑滚动 */
        html {
            scroll-behavior: smooth;
        }
        
        /* 导航栏固定时的偏移 */
        .navbar-offset {
            padding-top: 76px;
            margin-top: -76px;
        }