:root {
            --primary-color: #8b0000;
            --secondary-color: #d4af37;
            --dark-color: #1a1a1a;
            --light-color: #f8f9fa;
            --text-color: #333;
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover {
            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-1596461404969-9ae70f2830c1?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: white;
        }
        .hero-section p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--primary-color);
        }
        .section-title.text-center:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-box {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
        }
        .feature-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(139, 0, 0, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .product-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            background-color: white;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .product-img {
            height: 250px;
            overflow: hidden;
        }
        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-img img {
            transform: scale(1.05);
        }
        .product-info {
            padding: 1.5rem;
        }
        .product-price {
            color: var(--primary-color);
            font-weight: 700;
            font-size: 1.2rem;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 0.6rem 2rem;
            border-radius: 30px;
            font-weight: 500;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #6d0000;
            border-color: #6d0000;
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(139, 0, 0, 0.3);
        }
        .btn-secondary-custom {
            background-color: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            padding: 0.6rem 2rem;
            border-radius: 30px;
            font-weight: 500;
            transition: var(--transition);
        }
        .btn-secondary-custom:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(139, 0, 0, 0.3);
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
        }
        .timeline-content {
            padding: 20px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            background-color: white;
            border: 4px solid var(--primary-color);
            border-radius: 50%;
            top: 15px;
            z-index: 1;
        }
        .timeline-item:nth-child(odd)::after {
            right: -12px;
        }
        .timeline-item:nth-child(even)::after {
            left: -12px;
        }
        .contact-info-box {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--box-shadow);
            height: 100%;
            text-align: center;
        }
        .contact-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(139, 0, 0, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .footer {
            background-color: var(--dark-color);
            color: #aaa;
            padding: 4rem 0 2rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid #333;
            padding-top: 1.5rem;
            margin-top: 3rem;
            text-align: center;
        }
        .friendlink {
            background-color: #f9f9f9;
            padding: 3rem 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 0.8rem 1.5rem;
            border-radius: 30px;
            margin: 0.5rem;
            text-decoration: none;
            color: var(--text-color);
            border: 1px solid #ddd;
            transition: var(--transition);
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .map-container {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
        }
        .certificate-badge {
            display: inline-block;
            background-color: #f8f9fa;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            padding: 0.8rem 1.2rem;
            margin: 0.5rem;
            font-size: 0.9rem;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-item::after {
                left: 18px;
            }
            .timeline-item:nth-child(odd)::after,
            .timeline-item:nth-child(even)::after {
                left: 18px;
            }
        }
        .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;
            font-size: 1.2rem;
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
            z-index: 1000;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #6d0000;
            color: white;
            transform: translateY(-5px);
        }