:root {
            --primary-color: #0a3d62;
            --secondary-color: #f9ca24;
            --accent-color: #eb4d4b;
            --light-bg: #f8f9fa;
            --dark-text: #2c3e50;
            --transition: all 0.3s ease;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: var(--dark-text);
            overflow-x: hidden;
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(10, 61, 98, 0.95);
            backdrop-filter: blur(10px);
            padding-top: 1rem;
            padding-bottom: 1rem;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: white !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.85) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 61, 98, 0.85), rgba(10, 61, 98, 0.9)), url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 10rem 0 8rem;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            opacity: 0.9;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border: none;
            color: var(--primary-color);
            padding: 0.8rem 2.5rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #f1c40f;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .service-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem 2rem;
            height: 100%;
            transition: var(--transition);
            border: 1px solid #eee;
            text-align: center;
            box-shadow: var(--shadow);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-color: var(--secondary-color);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: inline-block;
        }
        .about-img {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .about-img:hover {
            transform: scale(1.03);
        }
        .portfolio-item {
            position: relative;
            border-radius: 15px;
            overflow: hidden;
            margin-bottom: 2rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .portfolio-item:hover {
            transform: translateY(-10px);
        }
        .portfolio-overlay {
            position: absolute;
            bottom: 0;
            background: linear-gradient(transparent, rgba(10, 61, 98, 0.9));
            width: 100%;
            padding: 2rem;
            color: white;
            transform: translateY(30px);
            transition: var(--transition);
            opacity: 0;
        }
        .portfolio-item:hover .portfolio-overlay {
            transform: translateY(0);
            opacity: 1;
        }
        .team-card {
            background: white;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            margin-bottom: 2rem;
        }
        .team-card:hover {
            transform: translateY(-10px);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
        }
        .contact-info-box {
            background: var(--light-bg);
            border-radius: 15px;
            padding: 2.5rem;
            height: 100%;
            border-left: 5px solid var(--secondary-color);
            transition: var(--transition);
        }
        .contact-info-box:hover {
            background: white;
            box-shadow: var(--shadow);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        footer {
            background-color: var(--primary-color);
            color: rgba(255, 255, 255, 0.85);
            padding-top: 4rem;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 1.5rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 0.7rem;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .friendlink {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            padding: 2rem;
            margin-top: 2rem;
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.8);
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .flink:hover {
            background-color: var(--secondary-color);
            color: var(--primary-color);
            border-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 1.5rem 0;
            margin-top: 4rem;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background-color: var(--secondary-color);
            color: var(--primary-color);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #f1c40f;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .navbar-nav {
                background-color: rgba(10, 61, 98, 0.98);
                padding: 1rem;
                border-radius: 10px;
                margin-top: 1rem;
            }
        }