:root {
            --primary-color: #0a3d62;
            --secondary-color: #3c6382;
            --accent-color: #f9ca24;
            --light-color: #f5f6fa;
            --dark-color: #2c3e50;
            --success-color: #1dd1a1;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, .navbar-brand {
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-header {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-header h2 {
            display: inline-block;
            padding-bottom: 15px;
            position: relative;
        }
        .section-header h2:after {
            content: '';
            position: absolute;
            width: 70px;
            height: 4px;
            background: var(--accent-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 61, 98, 0.85), rgba(60, 99, 130, 0.9)), url('https://images.unsplash.com/photo-1556742049-0cfed4f6a45d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 180px 0 120px;
            position: relative;
        }
        @media (max-width: 768px) {
            .hero-section { padding: 120px 0 80px; }
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero-section h1 { font-size: 2.5rem; }
        }
        .btn-primary-custom {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            color: var(--dark-color);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 30px;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: #e0b420;
            border-color: #e0b420;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: color 0.3s;
        }
        .navbar {
            padding-top: 1rem;
            padding-bottom: 1rem;
            transition: all 0.4s;
            background-color: rgba(255,255,255,0.98) !important;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        .navbar-brand {
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand i {
            color: var(--accent-color);
            margin-right: 8px;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-color) !important;
        }
        .icon-box {
            background: white;
            padding: 2.5rem;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            height: 100%;
            transition: transform 0.3s, box-shadow 0.3s;
            border-top: 4px solid var(--accent-color);
        }
        .icon-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.1);
        }
        .icon-box i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .stats-box {
            text-align: center;
            padding: 2rem;
            background: var(--light-color);
            border-radius: 10px;
            transition: all 0.3s;
        }
        .stats-box:hover {
            background: white;
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .product-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.06);
            transition: all 0.4s ease;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.12);
        }
        .product-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .product-card .card-body {
            padding: 1.8rem;
        }
        .news-card {
            border-left: 4px solid var(--accent-color);
            border-radius: 0 8px 8px 0;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.04);
            transition: all 0.3s;
        }
        .news-card:hover {
            border-left-width: 8px;
            padding-left: 1.7rem;
        }
        .friendlink-section {
            background: var(--light-color);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 50px;
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s;
            border: 1px solid #eee;
        }
        .flink:hover {
            color: var(--primary-color);
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.08);
            border-color: var(--accent-color);
        }
        .contact-info-box {
            background: var(--primary-color);
            color: white;
            padding: 2.5rem;
            border-radius: 12px;
            height: 100%;
        }
        .contact-info-box i {
            font-size: 2rem;
            margin-bottom: 1.2rem;
            color: var(--accent-color);
        }
        footer {
            background: var(--dark-color);
            color: #bbb;
            padding-top: 4rem;
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--accent-color);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 1.5rem 0;
            margin-top: 3rem;
        }
        .map-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            height: 100%;
            min-height: 300px;
        }
        .form-control, .form-select {
            padding: 12px 18px;
            border-radius: 8px;
            border: 1px solid #ddd;
            transition: all 0.3s;
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.25rem rgba(249, 202, 36, 0.25);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--accent-color);
            color: var(--dark-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #e0b420;
            transform: translateY(-5px);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
            margin-top: 3rem;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 3px;
            background: var(--accent-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
            padding-left: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -38px;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--primary-color);
            border: 3px solid var(--accent-color);
        }