:root {
            --primary-color: #0a3d62;
            --secondary-color: #079992;
            --accent-color: #f8c291;
            --light-color: #f5f6fa;
            --dark-color: #2c3e50;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .navbar {
            background-color: rgba(10, 61, 98, 0.95) !important;
            backdrop-filter: blur(10px);
            padding-top: 1rem;
            padding-bottom: 1rem;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: white !important;
        }
        .navbar-brand i {
            color: var(--accent-color);
            margin-right: 8px;
        }
        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            margin: 0 3px;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: white !important;
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, #1e5799 100%);
            color: white;
            padding: 160px 0 120px;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('https://images.unsplash.com/photo-1589829545856-d10d557cf95f?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            opacity: 0.15;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        }
        .hero p {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .hero-btns .btn {
            margin-right: 15px;
            margin-bottom: 15px;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }
        .btn-primary:hover {
            background-color: #0a7c7c;
            border-color: #0a7c7c;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(7, 153, 146, 0.3);
        }
        .btn-outline-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
        }
        .service-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 2.5rem 2rem;
            height: 100%;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            border-top: 4px solid transparent;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
            border-top-color: var(--secondary-color);
        }
        .service-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
        }
        .about-img {
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
        }
        .about-img img {
            transition: var(--transition);
        }
        .about-img:hover img {
            transform: scale(1.03);
        }
        .case-item {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            margin-bottom: 30px;
            box-shadow: var(--box-shadow);
        }
        .case-img {
            height: 250px;
            overflow: hidden;
        }
        .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-item:hover .case-img img {
            transform: scale(1.1);
        }
        .case-content {
            padding: 1.5rem;
            background: white;
        }
        .case-tag {
            display: inline-block;
            background: var(--light-color);
            color: var(--secondary-color);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .team-card {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            margin-bottom: 30px;
        }
        .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .team-img {
            height: 280px;
            overflow: hidden;
        }
        .team-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .team-card:hover .team-img img {
            transform: scale(1.05);
        }
        .team-info {
            padding: 1.5rem;
            text-align: center;
        }
        .team-social {
            margin-top: 1rem;
        }
        .team-social a {
            display: inline-block;
            width: 36px;
            height: 36px;
            line-height: 36px;
            background: var(--light-color);
            color: var(--primary-color);
            border-radius: 50%;
            margin: 0 5px;
            transition: var(--transition);
        }
        .team-social a:hover {
            background: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
        }
        .contact-form {
            background: white;
            padding: 2.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .form-control {
            padding: 0.8rem 1rem;
            border: 1px solid #e1e5eb;
            border-radius: var(--border-radius);
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.25rem rgba(7, 153, 146, 0.25);
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: var(--border-radius);
            color: var(--dark-color);
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
            border: 1px solid #eaeaea;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(10, 61, 98, 0.2);
            text-decoration: none;
        }
        .footer {
            background-color: var(--dark-color);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 80px;
            padding-bottom: 40px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background: var(--secondary-color);
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 5px;
        }
        .footer-contact li {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        .footer-contact i {
            color: var(--secondary-color);
            margin-right: 10px;
            margin-top: 5px;
            flex-shrink: 0;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .section-padding {
                padding-top: 60px;
                padding-bottom: 60px;
            }
        }
        @media (max-width: 768px) {
            .hero {
                padding: 120px 0 80px;
            }
            .hero h1 {
                font-size: 2.3rem;
            }
            .navbar-nav .nav-link {
                padding: 0.5rem 0 !important;
                margin: 5px 0;
            }
            .contact-form {
                padding: 1.5rem;
            }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }