:root {
            --primary-color: #2a6ebb;
            --secondary-color: #f8b739;
            --accent-color: #34c9bb;
            --light-color: #f8f9fc;
            --dark-color: #2c3e50;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Helvetica Neue', 'Microsoft YaHei', Arial, sans-serif;
            color: #333;
            overflow-x: hidden;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--accent-color);
            transition: var(--transition);
            transform: translateX(-50%);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 80%;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(42, 110, 187, 0.9) 0%, rgba(52, 201, 187, 0.85) 100%), url('https://images.unsplash.com/photo-1503676260728-1c00da094a0b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 10rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: #fff;
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #e6a52a;
            border-color: #e6a52a;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            color: var(--dark-color);
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        .feature-icon {
            font-size: 2.8rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: inline-block;
            transition: var(--transition);
        }
        .feature-card {
            padding: 2.5rem 2rem;
            border-radius: 15px;
            background: #fff;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            height: 100%;
            transition: var(--transition);
            border: 1px solid #f0f0f0;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(42, 110, 187, 0.1);
        }
        .feature-card:hover .feature-icon {
            color: var(--accent-color);
            transform: scale(1.1);
        }
        .product-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0,0,0,0.08);
            transition: var(--transition);
            margin-bottom: 2rem;
        }
        .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;
        }
        .product-card .card-body {
            padding: 1.8rem;
        }
        .stats-section {
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            color: white;
            padding: 5rem 0;
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 0.5rem;
        }
        .news-card {
            border-left: 5px solid var(--accent-color);
            padding-left: 1.5rem;
            margin-bottom: 2rem;
            transition: var(--transition);
        }
        .news-card:hover {
            border-left-color: var(--primary-color);
            padding-left: 2rem;
        }
        .team-member {
            text-align: center;
            margin-bottom: 2rem;
        }
        .team-member img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid #f0f0f0;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .team-member:hover img {
            border-color: var(--accent-color);
        }
        .contact-info-box {
            background: var(--light-color);
            padding: 2.5rem;
            border-radius: 15px;
            height: 100%;
            border-left: 5px solid var(--primary-color);
        }
        .contact-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding: 4rem 0 2rem;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 3rem 0;
            border-top: 1px solid #eee;
            border-bottom: 1px solid #eee;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            background: white;
            border-radius: 30px;
            border: 1px solid #e0e0e0;
            color: #555;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none !important;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .copyright {
            background-color: #1a252f;
            color: #aaa;
            padding: 1.5rem 0;
            font-size: 0.9rem;
        }
        .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;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
            text-decoration: none;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--accent-color);
            color: white;
        }