:root {
            --primary-blue: #0066cc;
            --dark-blue: #004080;
            --light-blue: #e6f2ff;
            --accent-teal: #00a3a3;
            --neutral-gray: #4a5568;
            --light-gray: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5, .navbar-brand {
            font-weight: 600;
            color: var(--dark-blue);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.97);
            box-shadow: 0 2px 15px rgba(0, 102, 204, 0.1);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar.scrolled {
            padding: 0.5rem 0;
        }
        .navbar-brand img {
            height: 42px;
            transition: height 0.3s;
        }
        .nav-link {
            color: var(--neutral-gray) !important;
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            position: relative;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-blue) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--primary-blue);
            left: 1.2rem;
            bottom: 0;
            transition: width 0.3s;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: calc(100% - 2.4rem);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 70%, var(--accent-teal) 100%);
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            top: -100px;
            right: -100px;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            bottom: -80px;
            left: -80px;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.5rem; }
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 60px;
            height: 4px;
            background: var(--primary-blue);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 102, 204, 0.15) !important;
        }
        .icon-box {
            width: 70px;
            height: 70px;
            background: var(--light-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            transition: all 0.3s;
        }
        .card-hover:hover .icon-box {
            background: var(--primary-blue);
            color: white;
        }
        .btn-primary {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
            padding: 0.6rem 1.8rem;
            border-radius: 30px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--dark-blue);
            border-color: var(--dark-blue);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 102, 204, 0.3);
        }
        .btn-outline-primary {
            color: var(--primary-blue);
            border-color: var(--primary-blue);
            padding: 0.6rem 1.8rem;
            border-radius: 30px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
            transform: translateY(-2px);
        }
        footer {
            background: linear-gradient(to bottom, #1a2b4a, #0d1729);
            color: #cbd5e0;
            padding-top: 4rem;
        }
        footer a {
            color: #cbd5e0;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin: 2rem 0;
        }
        .flink {
            display: inline-block;
            background: rgba(255, 255, 255, 0.05);
            padding: 0.5rem 1.2rem;
            margin: 0.3rem;
            border-radius: 20px;
            transition: all 0.3s;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .flink:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-blue);
            line-height: 1;
        }
        .news-card {
            border-left: 4px solid transparent;
            transition: all 0.3s;
            padding: 1.5rem;
            height: 100%;
        }
        .news-card:hover {
            border-left-color: var(--primary-blue);
            background-color: var(--light-gray);
            transform: translateX(5px);
        }
        .contact-info-box {
            background: var(--light-gray);
            border-radius: 12px;
            padding: 2rem;
            height: 100%;
            border-left: 4px solid var(--primary-blue);
        }
        .product-img-container {
            overflow: hidden;
            border-radius: 10px;
            height: 220px;
        }
        .product-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .product-img-container:hover img {
            transform: scale(1.05);
        }
        .timeline-item {
            position: relative;
            padding-left: 2.5rem;
            padding-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary-blue);
            left: 0;
            top: 5px;
        }
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 2px;
            height: 100%;
            background: #e2e8f0;
            left: 5px;
            top: 20px;
        }
        .timeline-item:last-child::after {
            display: none;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--dark-blue);
            transform: translateY(-3px);
        }