:root {
            --primary-color: #c8102e;
            --secondary-color: #003366;
            --accent-color: #f4a300;
            --light-gray: #f8f9fa;
            --dark-gray: #343a40;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.8;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--secondary-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            color: var(--dark-gray) !important;
            font-weight: 500;
            margin: 0 8px;
            position: relative;
            padding: 8px 0 !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(200, 16, 46, 0.8)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0 120px;
            margin-top: 76px;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 25px;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 12px 35px;
            font-weight: 600;
            border-radius: 30px;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #a50d26;
            border-color: #a50d26;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(200, 16, 46, 0.2);
        }
        .btn-secondary-custom {
            background-color: transparent;
            border-color: white;
            color: white;
            padding: 12px 35px;
            font-weight: 600;
            border-radius: 30px;
            transition: var(--transition);
        }
        .btn-secondary-custom:hover {
            background-color: white;
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .icon-box {
            width: 80px;
            height: 80px;
            background-color: rgba(200, 16, 46, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            transition: var(--transition);
        }
        .card-hover:hover .icon-box {
            background-color: var(--primary-color);
            color: white;
        }
        .icon-box i {
            font-size: 2rem;
            color: var(--primary-color);
        }
        .card-hover:hover .icon-box i {
            color: white;
        }
        .product-card {
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }
        .product-img {
            height: 250px;
            overflow: hidden;
        }
        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img img {
            transform: scale(1.1);
        }
        .product-card:hover {
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .badge-custom {
            background-color: var(--accent-color);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-weight: 600;
        }
        .news-card {
            border-left: 4px solid transparent;
            transition: var(--transition);
            height: 100%;
        }
        .news-card:hover {
            border-left-color: var(--primary-color);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
        }
        .stats-section {
            background: linear-gradient(rgba(0, 51, 102, 0.9), rgba(0, 51, 102, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 80px 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--accent-color);
            margin-bottom: 10px;
        }
        .stat-title {
            font-size: 1.2rem;
            font-weight: 600;
        }
        footer {
            background-color: #1a2a3a;
            color: #ccc;
            padding-top: 70px;
        }
        .footer-title {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: var(--primary-color);
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .contact-info i {
            width: 30px;
            color: var(--primary-color);
        }
        .copyright {
            background-color: #0e1a26;
            padding: 20px 0;
            margin-top: 50px;
            font-size: 0.9rem;
        }
        .friendlink {
            background-color: var(--light-gray);
            padding: 40px 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            color: var(--dark-gray);
            padding: 10px 20px;
            margin: 5px 10px;
            border-radius: 5px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #eaeaea;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .navbar-collapse {
                background-color: white;
                padding: 15px;
                border-radius: 5px;
                box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
                margin-top: 10px;
            }
        }