:root {
            --primary: #dc3545;
            --primary-dark: #bd2130;
            --primary-light: #e83e8c;
            --secondary: #6c757d;
            --dark: #212529;
            --light: #f8f9fa;
        }
        
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        
        .navbar {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            padding: 15px 0;
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: white !important;
            display: flex;
            align-items: center;
        }
        
        .logo-ns {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: white;
            color: var(--primary);
            font-weight: 800;
            font-size: 1.5rem;
            border-radius: 8px;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        
        . product-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('images/product.png');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
        }
		        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('images/xiaofan.png');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
        }
       
        .hero-section .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero-badge {
            display: inline-block;
            background: var(--primary);
            color: white;
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        
        .section-title {
            position: relative;
            margin-bottom: 40px;
            padding-bottom: 15px;
            font-weight: 700;
        }
        
        .section-title:after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--primary);
        }
        
        .section-title.text-center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        
        .feature-box {
            background: white;
            border-radius: 10px;
            padding: 30px;
            height: 100%;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .feature-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            background: rgba(220, 53, 69, 0.1);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.8rem;
        }
        
        .product-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: all 0.3s;
            height: 100%;
        }
        
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
        }
        
        .product-img {
            height: 200px;
            overflow: hidden;
        }
        
        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .product-card:hover .product-img img {
            transform: scale(1.1);
        }
        
        .product-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--primary);
            color: white;
            padding: 5px 15px;
            border-radius: 30px;
            font-size: 0.8rem;
            z-index: 10;
        }
        
        .stats-box {
            background: white;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }
        
        .stats-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        
        .tech-section {
            background: url('./images/hero.png');
            background-size: cover;
            background-attachment: fixed;
            position: relative;
            color: white;
        }
        
        .tech-section:before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
        }
        
        .tech-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 10px;
            padding: 30px;
            margin-bottom: 30px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .footer {
            background: #1a1a1a;
            color: #ddd;
            padding: 70px 0 0;
        }
        
        .footer-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-title:after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--primary);
        }
        
        .footer-links a {
            display: block;
            margin-bottom: 12px;
            color: #aaa;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
        }
        
        .social-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 50%;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .social-link:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }
        
        .copyright {
            background: rgba(0, 0, 0, 0.2);
            padding: 25px 0;
            text-align: center;
            margin-top: 50px;
        }
        
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
        }
        
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
        }
        
        .btn-outline-primary:hover {
            background: var(--primary);
            color: white;
        }
        
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            opacity: 0;
            transition: all 0.3s;
        }
        
        .back-to-top.show {
            opacity: 1;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .hero-section {
                padding: 100px 0 60px;
            }
            
            .section-title {
                margin-bottom: 30px;
            }
            
            .feature-box {
                margin-bottom: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 40px;
            }
            
            .hero-title {
                font-size: 2.2rem;
            }
            
            .footer {
                padding: 50px 0 0;
            }
            
            .footer-col {
                margin-bottom: 30px;
            }
        }