:root {
            --primary-color: #c62828;
            --secondary-color: #f5f5f5;
            --accent-color: #ff9800;
            --dark-color: #333333;
            --light-color: #ffffff;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', system-ui, sans-serif;
            color: var(--dark-color);
            overflow-x: hidden;
        }
        .header-gradient {
            background: linear-gradient(135deg, rgba(198,40,40,0.9) 0%, rgba(139,0,0,0.9) 100%);
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1414235077428-338989a2e8c0?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
        }
        .section-title.left-align:after {
            left: 0;
            transform: none;
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #a71c1c;
            border-color: #a71c1c;
            transform: translateY(-2px);
        }
        .icon-box {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--secondary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: var(--primary-color);
            font-size: 2rem;
        }
        .service-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            background: var(--secondary-color);
            border-radius: 30px;
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #e0e0e0;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .footer {
            background: #222222;
            color: #cccccc;
        }
        .footer a {
            color: #cccccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--accent-color);
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.1);
            margin-right: 10px;
            transition: var(--transition);
        }
        .social-icon:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
        }
        .navbar-brand img {
            height: 50px;
        }
        .product-card img {
            height: 200px;
            object-fit: cover;
        }
        .testimonial-card {
            background: var(--secondary-color);
            border-left: 5px solid var(--primary-color);
        }
        .contact-info-box {
            padding: 1.5rem;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0 60px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stats-number {
                font-size: 2.5rem;
            }
        }
        .map-container {
            height: 400px;
            border-radius: 10px;
            overflow: hidden;
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0;
        }
        .breadcrumb-item a {
            color: var(--primary-color);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -36px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--primary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--primary-color);
        }