:root {
            --primary-color: #0a4d8c;
            --secondary-color: #c9a96e;
            --accent-color: #1a6dbe;
            --dark-color: #1e3a5f;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
            --transition: all 0.3s ease;
        }
        body {
            font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding: 15px 0;
            transition: var(--transition);
        }
        .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: 600;
            color: var(--dark-color) !important;
            margin: 0 8px;
            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: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .navbar-toggler {
            border: none;
            padding: 0;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 77, 140, 0.85), rgba(30, 58, 95, 0.9)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2069&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 150px 0 120px;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 25px;
            line-height: 1.2;
        }
        .hero-subtitle {
            font-size: 1.2rem;
            margin-bottom: 35px;
            opacity: 0.9;
            max-width: 700px;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: #fff;
            font-weight: 600;
            padding: 12px 32px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #b89a5e;
            border-color: #b89a5e;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .btn-outline-light {
            font-weight: 600;
            padding: 12px 32px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .service-card {
            background-color: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            height: 100%;
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background-color: rgba(10, 77, 140, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            color: var(--primary-color);
            font-size: 2rem;
        }
        .project-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: var(--transition);
            position: relative;
        }
        .project-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .project-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(10, 77, 140, 0.9));
            color: white;
            padding: 30px 20px 20px;
            transform: translateY(100%);
            transition: var(--transition);
        }
        .project-card:hover .project-overlay {
            transform: translateY(0);
        }
        .stats-section {
            background-color: var(--primary-color);
            color: white;
            padding: 80px 0;
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .stat-text {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        .team-card {
            background-color: #fff;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: var(--transition);
        }
        .team-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 80px 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            border: 1px solid #e9ecef;
            border-radius: 6px;
            padding: 12px 24px;
            margin: 8px;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .footer {
            background-color: var(--dark-color);
            color: rgba(255, 255, 255, 0.8);
        }
        .footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 25px;
            padding-bottom: 10px;
            position: relative;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: var(--secondary-color);
        }
        .footer-bottom {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.8rem;
            }
            .hero-section {
                padding: 120px 0 80px;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.9rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .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;
            cursor: pointer;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }