:root {
            --primary-color: #c62828;
            --secondary-color: #2e7d32;
            --accent-color: #ff9800;
            --dark-color: #1b5e20;
            --light-color: #f5f5f5;
            --text-dark: #333;
            --text-light: #666;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.7;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--dark-color);
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background-color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1565299624946-b28f40a0ca4b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
        }
        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 2.5rem;
            opacity: 0.9;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: #a71c1c;
            border-color: #a71c1c;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .feature-card {
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.4s ease;
            border: 1px solid #eaeaea;
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .feature-card .card-body {
            padding: 2rem;
        }
        .feature-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .product-card {
            border-radius: 8px;
            overflow: hidden;
            transition: all 0.3s ease;
            border: 1px solid #eee;
        }
        .product-card:hover {
            transform: scale(1.03);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .product-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .news-card {
            border-left: 4px solid var(--secondary-color);
            padding-left: 1.5rem;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            border-left-color: var(--primary-color);
            padding-left: 2rem;
        }
        .footer {
            background-color: #1a1a1a;
            color: #ccc;
            padding-top: 4rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        .footer h5::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: var(--primary-color);
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        .copyright {
            background-color: #111;
            padding: 1.5rem 0;
            margin-top: 3rem;
            border-top: 1px solid #333;
        }
        friendlink {
            display: block;
            margin-top: 2rem;
        }
        .flink {
            display: inline-block;
            background-color: #f8f9fa;
            padding: 0.5rem 1.2rem;
            margin: 0.3rem;
            border-radius: 4px;
            color: var(--text-dark);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .navbar-nav {
                text-align: center;
                padding-top: 1rem;
            }
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.8s ease forwards;
        }
        .contact-card {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            border-radius: 10px;
            padding: 2rem;
            height: 100%;
            transition: all 0.3s ease;
        }
        .contact-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .content-section {
            padding: 5rem 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
        }
        .text-center .section-title::after {
            left: 50%;
            transform: translateX(-50%);
        }