:root {
            --primary-color: #c62828;
            --secondary-color: #388e3c;
            --accent-color: #ff8f00;
            --light-color: #fff8e1;
            --dark-color: #263238;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1565299624946-b28f40a0ae38?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0;
            margin-top: 76px;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
        }
        .product-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .product-card img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f8f9fa;
            border-radius: 50px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .footer {
            background: var(--dark-color);
            color: #ccc;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .bg-light-custom {
            background-color: var(--light-color);
        }
        .btn-primary-custom {
            background: var(--primary-color);
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary-custom:hover {
            background: #a71c1c;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(198, 40, 40, 0.3);
        }
        .icon-feature {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -38px;
            top: 5px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-color);
            border: 4px solid white;
            box-shadow: 0 0 0 3px var(--primary-color);
        }
        .contact-info i {
            width: 40px;
            color: var(--primary-color);
        }
        .article-content {
            text-align: justify;
            hyphens: auto;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
                text-align: center;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }