:root {
            --primary-color: #0056b3;
            --secondary-color: #ffc107;
            --dark-color: #212529;
            --light-color: #f8f9fa;
            --success-color: #198754;
            --danger-color: #dc3545;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 30, 60, 0.85), rgba(0, 30, 60, 0.9)), url('https://images.unsplash.com/photo-1621905252507-b35492cc74b4?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0 100px;
            position: relative;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
            text-align: center;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--primary-color);
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            border-radius: 10px;
            overflow: hidden;
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15) !important;
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.8rem;
        }
        .btn-primary-custom {
            background: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary-custom:hover {
            background: #004494;
            border-color: #004494;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 86, 179, 0.3);
        }
        .contact-info i {
            width: 40px;
            color: var(--primary-color);
        }
        .footer {
            background: var(--dark-color);
            color: #ccc;
            padding-top: 3rem;
        }
        .footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: white;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 20px;
            margin: 5px 10px 5px 0;
            border-radius: 4px;
            color: #ccc;
            transition: all 0.3s;
            text-decoration: none;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .product-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .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::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            right: -13px;
            background-color: white;
            border: 4px solid var(--primary-color);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }
        .left {
            left: 0;
        }
        .right {
            left: 50%;
        }
        .right::after {
            left: -12px;
        }
        .timeline-content {
            padding: 20px 30px;
            background-color: white;
            position: relative;
            border-radius: 6px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        @media screen and (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item::after {
                left: 18px;
            }
            .left, .right {
                left: 0;
            }
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(0, 86, 179, 0.1);
            color: var(--primary-color);
            font-weight: 600;
        }
        .sticky-nav {
            position: sticky;
            top: 0;
            z-index: 1020;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .bg-gradient-primary {
            background: linear-gradient(135deg, var(--primary-color), #003d82);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: all 0.3s;
            max-height: 60px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .map-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0;
        }
        .breadcrumb-item a {
            color: var(--primary-color);
        }
        .text-justify {
            text-align: justify;
        }
        .lead {
            font-size: 1.15rem;
        }